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Sample records for bryophytes

  1. Conservation status of bryophytes in eastern Australia

    OpenAIRE

    Streimann, Heinar

    1994-01-01

    No bryophyte conservation programs are in place in Australia as the knowledge of bryophytes is poor, especially of their habitat preferences and distribution. The conservation of species against habitats is discussed and it is maintained on present evidence that areas conserved for vascular plants and/or animal habitats, as national parks and forest reserves, in most cases would adequately conserve bryophytes.

  2. [Research advances on interactions among bryophytes].

    Science.gov (United States)

    Bu, Zhao-Jun; Chen, Xu; Jiang, Li-Hong; Li, Hong-Kai; Zhao, Hong-Yan

    2009-02-01

    This paper summarized the present research status and advances on the intra- and interspecific positive interaction, intra- and inter-specific competition, niche, and coexistence of bryophytes. Bryophytes are generally the dominant plants in harsh environments, and there is a trade-off between their water retention and light and nutrient resource availability. Because of the lesser importance of competition in harsh environments, the positive interaction among bryophytes is common, but the intra- and inter-specific competition among bryophytes and the competition between bryophytes and vascular plants are not rare. Competition hierarchy may exist among some bryophytes, but often changes with environments. In the process of bryophyte community formation, the random process, nature of colonization, and difference in regeneration strategy can result in the niche overlap and coexistence of bryophytes, and the niche differentiation resulted from competition is also one of the mechanisms for bryophytes coexistence. Bryophytes should not be simply classified as stress tolerated-ruderal life history strategists, and competition is still one of important factors for constructing some bryophyte communities and vegetations co-existed by bryophytes and vascular plants.

  3. Phytohormone Profiling across the Bryophytes.

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    Lenka Záveská Drábková

    Full Text Available Bryophytes represent a very diverse group of non-vascular plants such as mosses, liverworts and hornworts and the oldest extant lineage of land plants. Determination of endogenous phytohormone profiles in bryophytes can provide substantial information about early land plant evolution. In this study, we screened thirty bryophyte species including six liverworts and twenty-four mosses for their phytohormone profiles in order to relate the hormonome with phylogeny in the plant kingdom.Samples belonging to nine orders (Pelliales, Jungermanniales, Porellales, Sphagnales, Tetraphidales, Polytrichales, Dicranales, Bryales, Hypnales were collected in Central and Northern Bohemia. The phytohormone content was analysed with a high performance liquid chromatography electrospray tandem-mass spectrometry (HPLC-ESI-MS/MS.As revealed for growth hormones, some common traits such as weak conjugation of both cytokinins and auxins, intensive production of cisZ-type cytokinins and strong oxidative degradation of auxins with abundance of a major primary catabolite 2-oxindole-3-acetic acid were pronounced in all bryophytes. Whereas apparent dissimilarities in growth hormones profiles between liverworts and mosses were evident, no obvious trends in stress hormone levels (abscisic acid, jasmonic acid, salicylic acid were found with respect to the phylogeny.The apparent differences in conjugation and/or degradation strategies of growth hormones between liverworts and mosses might potentially show a hidden link between vascular plants and liverworts. On the other hand, the complement of stress hormones in bryophytes probably correlate rather with prevailing environmental conditions and plant survival strategy than with plant evolution.

  4. SAXICOLE BRYOPHYTES FROM VÂLSAN KEYS

    OpenAIRE

    Codruţa Mihaela Dobrescu; Liliana Cristina Soare

    2015-01-01

    The paper presents a review of the saxicole species in the Vâlsan Keys and considerations regarding the bryophytic saxicole cenoses from the protected area. To analyze the diversity of the saxicole bryophytes, we considered the number of species, as well as the phytogeografical element, the growth form and the “life strategy” of each species. From the systematic perspective, Vâlsan Keys are featured by a high specific diversity of the saxicole bryophytes.

  5. SAXICOLE BRYOPHYTES FROM VÂLSAN KEYS

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    Codruţa Mihaela Dobrescu

    2015-07-01

    Full Text Available The paper presents a review of the saxicole species in the Vâlsan Keys and considerations regarding the bryophytic saxicole cenoses from the protected area. To analyze the diversity of the saxicole bryophytes, we considered the number of species, as well as the phytogeografical element, the growth form and the “life strategy” of each species. From the systematic perspective, Vâlsan Keys are featured by a high specific diversity of the saxicole bryophytes.

  6. Recent developments in bryophyte population ecology

    NARCIS (Netherlands)

    During, H.J.; Tooren, B.F. van

    1987-01-01

    Bryophytes abound in a wide variety of habitats, and despite their low stature play a significant role in many ecosystems. Earlier views of bryophytes as being ‘evolutionary failures’ are being questioned since the discovery of high genetic variability in those species and populations which have bee

  7. New or otherwise interesting Bryophytes from Crete

    NARCIS (Netherlands)

    Gradstein, S.R.

    1971-01-01

    This report deals with the results of the determination of bryophytes collected by the author in 1967 in the western District of Chanià on the island of Crete. 33 species new to Crete were discovered and a number of bryophytes were collected for the first time in the District Chanià. Some species li

  8. Bryophytes - an emerging source for herbal remedies and chemical production

    DEFF Research Database (Denmark)

    Sabovljevic, Marko S.; Sabovljević, Aneta D.; Ikram, Nur Kusaira K.

    2016-01-01

    biomass in various ecosystems, bryophytes are a seldom part of ethnomedicine and rarely subject to medicinal and chemical analyses. Still, hundreds of novel natural products have been isolated from bryophytes. Bryophytes have been shown to contain numerous potentially useful natural products, including...... loss, plant growth regulators and allelopathic activities. Bryophytes also cause allergies and contact dermatitis. All these effects highlight bryophytes as potential source for herbal remedies and production of chemicals to be used in various products....

  9. Fern and bryophyte endozoochory by slugs.

    Science.gov (United States)

    Boch, Steffen; Berlinger, Matthias; Fischer, Markus; Knop, Eva; Nentwig, Wolfgang; Türke, Manfred; Prati, Daniel

    2013-07-01

    Endozoochory plays a prominent role for the dispersal of seed plants, and dispersal vectors are well known. However, for taxa such as ferns and bryophytes, endozoochory has only been suggested anecdotally but never tested in controlled experiments. We fed fertile leaflets of three ferns and capsules of four bryophyte species to three slug species. We found that, overall, spores germinated from slug feces in 57.3% of all 89 fern and in 51.3% of all 117 bryophyte samples, showing that the spores survived gut passage of slugs. Moreover, the number of samples within which spores successfully germinated did not differ among plant species but varied strongly among slug species. This opens new ecological perspectives suggesting that fern and bryophyte endozoochory by gastropods is a so-far-overlooked mode of dispersal, which might increase local population sizes of these taxa by spore deposition on suitable substrates.

  10. Secondary metabolites in bryophytes: an ecological aspect.

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    Xie, Chun-Feng; Lou, Hong-Xiang

    2009-03-01

    Bryophytes frequently grow in an unfavorable environment as the earliest land plants, and inevitably biosynthesize secondary metabolites against biotic or abiotic stress. They not only defend against the plant competition, microbial attack, and insect or animal predation, but also function in UV protection, drought tolerance, and freezing survival. This review covers the ecological aspect of secondary metabolites in bryophytes and is taxonomically presented according to the ecological significances.

  11. How do bryophytes govern generative recruitment of vascular plants?

    Science.gov (United States)

    Soudzilovskaia, Nadejda A; Graae, Bente J; Douma, Jacob C; Grau, Oriol; Milbau, Ann; Shevtsova, Anna; Wolters, Loes; Cornelissen, Johannes H C

    2011-06-01

    Interactions between vascular plants and bryophytes determine plant community composition in many ecosystems. Yet, little is known about the importance of interspecific differences between bryophytes with respect to their effects on vascular plants. We compared the extent to which species-specific bryophyte effects on vascular plant generative recruitment depend on the following underlying mechanisms: allelopathy, mechanical obstruction, soil moisture and temperature control. We sowed 10 vascular plant species into monospecific mats of six chemically and structurally diverse bryophytes, and examined 1-yr seedling recruitment. Allelopathic effects were also assessed in a laboratory phyto-assay. Although all bryophytes suppressed vascular plant regeneration, there were significant differences between the bryophyte species. The lack of interactions indicated the absence of species-specific adaptations of vascular plants for recruitment in bryophyte mats. Differences between bryophyte species were best explained by alterations in temperature regime under bryophyte mats, mostly by reduced temperature amplitudes during germination. The temperature regime under bryophyte mats was well predicted by species-specific bryophyte cushion thickness. The fitness of established seedlings was not affected by the presence of bryophytes. Our results suggest that climatically or anthropogenically driven changes in the species' composition of bryophyte communities have knock-on effects on vascular plant populations via generative reproduction.

  12. BRYOPHYTES OF MOUNT PATUHA, WEST JAVA, INDONESIA

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    ROBBERT GRADSTEIN

    2010-11-01

    Full Text Available GRADSTEIN, R.    et al. 2010. Bryophytes of Mount Patuha, West  Java,  Indonesia.  Reinwardtia  13(2:  107–123. This  paper  presents  the  results  of  a  two–day  survey  of  the  bryophyte  flora of Mt.  Patuha  and  its  surroundings  near Bandung, West Java, carried out in the framework of the 5th regional training course on bryophyte and lichen diversity and conservation organized by SEAMEO BIOTROP, Bogor, in July 2009. A total of 159 bryophyte species were identi-fied,  including 98 mosses, 60  liverworts, and 1 hornwort, representing almost 1/6 of the  total bryophyte flora of Java. Three moss species, Bryohumbertia subcomosa (Dix. J.–P. Frahm, Fissidens gymnogynus Besch. and F. polypodioidesHedw., and one liverwort, Lejeunea pectinella Mizut., are new additions to the Javanese flora. The bryophyte diversity of Mt. Patuha is well representative of the Malesian flora and is rich in uncommon species. However, the relatively poor representation of shade epiphytes and commonness of sun epiphytes and generalists reflect disturbance of the forest by anthropogenic activities. Careful attention should be given  to conservation of  the  remaining natural  forest  in order  to prevent further losses of the rich bryophyte diversity of the area.

  13. National Inventory of Swiss Bryophytes (NISM)

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    Hofmann, Heike; Schnyder, Norbert

    2012-01-01

    The NISM-database (GIVD ID EU-CH-004) contains bryophyte records from 1,237 relevés of 100 m². 408 of these relevés are located on a systematic grid which covers the whole of Switzerland and Liechtenstein (1 relevé). Further 430 plots have been placed randomly (429 in CH, 1 in LI) and 399 plots have been positioned arbitrarily into different habitat types (387 in CH, 12 in LI). On each plot all bryophyte species present were recorded. For each species on each plot the main substrate where the...

  14. Bryophytes from Tuxedni Wilderness area, Alaska

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    Schofield, W.B.; Talbot, S. S.; Talbot, S.L.

    2002-01-01

    The bryoflora of two small maritime islands, Chisik and Duck Island (2,302 ha), comprising Tuxedni Wilderness in western lower Cook Inlet, Alaska, was examined to determine species composition in an area where no previous collections had been reported. The field study was conducted from sites selected to represent the totality of environmental variation within Tuxedni Wilderness. Data were analyzed using published reports to compare the bryophyte distribution patterns at three levels, the Northern Hemisphere, North America, and Alaska. A total of 286 bryophytes were identified: 230 mosses and 56 liverworts. Bryum miniatum, Dichodontium olympicum, and Orthotrichum pollens are new to Alaska. The annotated list of species for Tuxedni Wilderness expands the known range for many species and fills distribution gaps within Hulte??n's Central Pacific Coast district. Compared with bryophyte distribution in the Northern Hemisphere, the bryoflora of Tuxedni Wilderness primarily includes taxa of boreal (61%), montane (13%), temperate (11%), arctic-alpine (7%), cosmopolitan (7%), distribution; 4% of the total moss flora are North America endemics. A brief summary of the botanical exploration of the general area is provided, as is a description of the bryophytes present in the vegetation and habitat types of Chisik and Duck Islands.

  15. Bryophytes: Hoard of remedies, an ethno-medicinal review

    OpenAIRE

    Chandra, Satish; Chandra, Dinesh; Barh, Anupam; Pankaj,; Pandey, Raj Kumar; Sharma, Ishwar Prakash

    2016-01-01

    Bryophytes are the second largest group of land plants after angiosperms. There is very less knowledge available about medicinal properties of these plants. Bryophytes are popular remedy among the tribal people of different parts of the world. Tribal people use these plants to cure various ailments in their daily lives. Bryophytes are used to cure hepatic disorders, skin diseases, cardiovascular diseases, used as antipyretic, antimicrobial, wound healing and many more other ailments by differ...

  16. Life strategies of bryophytes on loess cliffs in Vojvodina, Serbia

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    Sabovljević Marko S.

    2004-01-01

    Full Text Available The loess cliffs of Vojvodina present a special ecosystem type. The main plant components in these habitats are cryptogams (bryophytes and lichens. The biology and life strategies of bryophytes recorded on loess in Vojvodina are studied in the present work, whose results confirm a very special ecology in such habitats. Colonist species with xeropottioid characteristics are dominant among bryophytes. It is stressed that loess cliff habitats are especially important from the standpoint of conservation.

  17. Assessment of pollution with aquatic bryophytes in Maritsa River (Bulgaria).

    Science.gov (United States)

    Gecheva, Gana; Yurukova, Lilyana; Ganeva, Anna

    2011-10-01

    Bryophyte species composition and 26 common physico-chemical and inorganic chemical parameters were assessed at 23 selected sites in the Maritsa River (BG) over a 4-year period. Principal components analyses (PCA) of both bryophytes and water variables distinguished different locations in the ecosystem. The data imply that the content of elements measured in bryophytes represents river contamination, while species compositional patterns reflect hydromorphology and general degradation. This study for the first time combined aquatic bryophyte occurrence, the bioaccumulation of 17 macro-and microelements in 17 species, and 26 water factors by principal components analysis (PCA) in an assessment of river pollution.

  18. Bryophyte Diversity in Mukteshwar (Uttarakhand): an overview

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    Asthana, A. K.; Sahu, Vinay

    2013-01-01

    The present study deals with the investigation of bryophytic flora of Mukteshwar (Uttarakhand). The present account deals with the study of 38 species belonging to 31 genera of 21 families. The mosses are represented by 21 species of 20 genera and 12 families, while Liverworts are represented by 15 species of 10 genera and 8 families. Hornworts consist of 1 genus and 2 species. The dominant families are Aytoniaceae, Marchantiaceae, Thuidiaceae and Pottiaceae. The dominant genera are Plagiocha...

  19. Bryophytes: Hoard of remedies, an ethno-medicinal review.

    Science.gov (United States)

    Chandra, Satish; Chandra, Dinesh; Barh, Anupam; Pankaj; Pandey, Raj Kumar; Sharma, Ishwar Prakash

    2017-01-01

    Bryophytes are the second largest group of land plants after angiosperms. There is very less knowledge available about medicinal properties of these plants. Bryophytes are popular remedy among the tribal people of different parts of the world. Tribal people use these plants to cure various ailments in their daily lives. Bryophytes are used to cure hepatic disorders, skin diseases, cardiovascular diseases, used as antipyretic, antimicrobial, wound healing and many more other ailments by different tribal communities of Africa, America, Europe, Poland, Argentina, Australia, New Zealand, Turkey, Japan, Taiwan, Pakistan, China, Nepal and different parts of South, North and Eastern India. Apart from ethno-medicinal uses some bryophytes possesses antitumor activities against different cancer cell lines and this property of bryophytes needs to be more focused in the future. Compile information about medicinal properties and anticancer properties of bryophytes is lacking till date. In the present review, the authors tried to compile all the ethno-medicinal and other related information of bryophytes and fill the knowledge lacuna in this particular field. Some published reviews are available but the information is segregated. This manuscript will help people doing research in the bryophytes.

  20. Phylogenetic biogeography and taxonomy of disjunctly distributed bryophytes

    Institute of Scientific and Technical Information of China (English)

    Jochen HEINRICHS; J(o)rn HENTSCHEL; Kathrin FELDBERG; Andrea BOMBOSCH; Harald SCHNEIDER

    2009-01-01

    More than 200 research papers on the molecular phylogeny and phylogenetic biogeography of bryophytes have been published since the beginning of this millenium. These papers corroborated assumptions of a complex ge-netic structure of morphologically circumscribed bryophytes, and raised reservations against many morphologically justified species concepts, especially within the mosses. However, many molecular studies allowed for corrections and modifications of morphological classification schemes. Several studies reported that the phylogenetic structure of disjunctly distributed bryophyte species reflects their geographical ranges rather than morphological disparities. Molecular data led to new appraisals of distribution ranges and allowed for the reconstruction of refugia and migra-tion routes. Intercontinental ranges of bryophytes are often caused by dispersal rather than geographical vicariance. Many distribution patterns of disjunct bryophytes are likely formed by processes such as short distance dispersal, rare long distance dispersal events, extinction, recolonization and diversification.

  1. Potential of Microsatellites Markers for the Genetic Analysis of Bryophytes

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    Saumy PANDEY

    2016-03-01

    Full Text Available Microsatellites have increasingly being used to study genetic diversity, phylogeny, population genetics, population ecology and genetic mapping of bryophytes. Due to co-dominant and highly reproducible features, microsatellites became markers of choice for several genetic analyses of bryophytes. However, the major limitation is de novo isolation of microsatellites from the interest species which were studied and gave genomic libraries. Initially, traditional methods of microsatellite development were tedious and time consuming, but due to the sequencing of several bryophytes available in public databases, advancement in PCR technologies and computer software, have cumulatively facilitated the development of microsatellites for bryophytes study. This review examines the features, strategies for the development of microsatellites and their utilization in many aspects of genetic and ecological studies of bryophytes.

  2. Forensic botany: usability of bryophyte material in forensic studies.

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    Virtanen, Viivi; Korpelainen, Helena; Kostamo, Kirsi

    2007-10-25

    Two experiments were performed to test the relevance of bryophyte (Plantae, Bryophyta) material for forensic studies. The first experiment was conducted to reveal if, and how well, plant fragments attach to footwear in general. In the test, 16 persons walked outdoors wearing rubber boots or hiking boots. After 24h of use outdoors the boots were carefully cleaned, and all plant fragments were collected. Afterwards, all plant material was examined to identify the species. In the second experiment, fresh material of nine bryophyte species was kept in a shed in adverse conditions for 18 months, after which DNA was extracted and subjected to genotyping to test the quality of the material. Both experiments give support for the usability of bryophyte material in forensic studies. The bryophyte fragments become attached to shoes, where they remain even after the wearer walks on a dry road for several hours. Bryophyte DNA stays intact, allowing DNA profiling after lengthy periods following detachment from the original plant source. Based on these experiments, and considering the fact that many bryophytes are clonal plants, we propose that bryophytes are among the most usable plants to provide botanical evidence for forensic investigations.

  3. The temperature acclimation potential of tropical bryophytes.

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    Wagner, S; Zotz, G; Bader, M Y

    2014-01-01

    Bryophyte biomass and diversity in tropical moist forests decrease dramatically from higher altitudes towards the lowlands. High respiratory carbon losses at high temperatures may partly explain this pattern, if montane species are unable to acclimatise their metabolic rates to lowland temperatures. We transplanted ten bryophyte species from two altitudes (1200 and 500 m a.s.l.) to lower (warmer) altitudes (500 m and sea level) in Panama. We studied short-term temperature acclimation of CO2 exchange for 2.5 months, and survival and growth for 21 months following transplantation. Short-term acclimation did not occur, and on a longer time scale mortality was highest and growth lowest in the transplanted samples. A few transplanted samples of most species, however, survived the whole experiment and finished with growth rates similar to controls. This recovery of growth rate suggests temperature acclimation, in spite of no measurable metabolic changes in smaller random samples. This acclimation even compensated for shorter periods of CO2 uptake due to more rapid drying. Nevertheless, these species are not abundant in lowland forests, perhaps due to dispersal or establishment limitation. The apparent heterogeneity of the acclimation potential within species may allow populations to adapt locally and avoid being forced uphill under climatic warming.

  4. In vitro culture and secondary metabolite isolation in bryophytes.

    Science.gov (United States)

    Sabovljevic, Aneta; Sabovljevic, Marko; Jockovic, Nebojsa

    2009-01-01

    Bryophytes, the second largest group of land plants, are extremely rich in terpenoids, phenols, glycosides, and fatty acids. Although bryophytes could be used in medicine, their chemistry is not very well known and the problem remains to obtain enough quantity of same species for analysis. In vitro cultivation of bryophytes is the most appropriate way for large biomass production and isolate of numerous useful compounds showing some interesting biologic activities. This technique is also useful in developmental, cellular, molecular, biochemical, and eco-physiologic studies.

  5. Metal accumulation by stream bryophytes, related to chemical speciation.

    Science.gov (United States)

    Tipping, E; Vincent, C D; Lawlor, A J; Lofts, S

    2008-12-01

    Metal accumulation by aquatic bryophytes was investigated using data for headwater streams of differing chemistry. The Windermere Humic Aqueous Model (WHAM) was applied to calculate chemical speciation, including competitive proton and metal interactions with external binding sites on the plants. The speciation modelling approach gives smaller deviations between observed and predicted bryophyte contents of Cu, Zn, Cd and Pb than regressions based on total filtered metal concentrations. If all four metals, and Ni, are considered together, the WHAM predictions are superior at the 1% level. Optimised constants for bryophyte binding by the trace metals are similar to those for humic substances and simple carboxylate ligands. Bryophyte contents of Na, Mg and Ca are approximately explained by binding at external sites, while most of the K is intracellular. Oxide phases account for some of the Al, and most of the Mn, Fe and Co.

  6. Therapeutic potential of bryophytes and derived compounds against cancer

    Institute of Scientific and Technical Information of China (English)

    Abhijit Dey; Anuradha Mukherjee

    2015-01-01

    Bryophytes, taxonomically placed between the algae and the pteridophytes, are divided into three classes such as Liverworts, Hornworts and Mosses. Indigenous use involves this small group of plants to treat various diseases. Bryophytes have been investigated pharmacologically for active biomolecules. Several constituents with therapeutic potential have been isolated, characterized and investigated for antibacterial, antifungal, antiviral, antioxidative, antiinflamatory and anticancerous efficacy. The present review deals with the literature covering the anticancerous potential of bryophytes. Apart from the examples of the compounds and the containing bryophyte genera, the authors have tried to include the examples of cancer cell lines on which the efficacy have been tested and the mode of action of certain cytotoxic agents. Crude extracts and isolated compounds from bryophytes were found to possess potent cytotoxic properties. Different types of terpenoids and bibenzyls have been reported among the most potent cytotoxic compounds. Most of these compounds were found to induce apoptosis by activating a number of genes and enzymes. Biochemical markers such as DNA fragmentation, nuclear condensation, proteolysis of poly (ADP-ribose) polymerase, activation of caspases, inhibition of antiapoptotic nuclear transcriptional factor-kappaB, activation of p38 mitogen-activated protein kinase etc. have been found to be associated with apoptotic and necrotic response. This review summarizes recent scientific findings and suggests further investigations to evaluate the cytotoxic efficacy of bryophytes.

  7. Phytochemical and biological studies of bryophytes.

    Science.gov (United States)

    Asakawa, Yoshinori; Ludwiczuk, Agnieszka; Nagashima, Fumihiro

    2013-07-01

    The bryophytes contain the Marchantiophyta (liverworts), Bryophyta (mosses) and Anthocerotophyta (hornworts). Of these, the Marchantiophyta have a cellular oil body which produce a number of mono-, sesqui- and di-terpenoids, aromatic compounds like bibenzyl, bis-bibenzyls and acetogenins. Most sesqui- and di-terpenoids obtained from liverworts are enantiomers of those found in higher plants. Many of these compounds display a characteristic odor, and can have interesting biological activities. These include: allergenic contact dermatitis, antimicrobial, antifungal and antiviral, cytotoxic, insecticidal, insect antifeedant, superoxide anion radical release, 5-lipoxygenase, calmodulin, hyaluronidase, cyclooxygenase, DNA polymerase β, and α-glucosidase and NO production inhibitory, antioxidant, piscicidal, neurotrophic and muscle relaxing activities among others. Each liverwort biosynthesizes unique components, which are valuable for their chemotaxonomic classification. Typical chemical structures and biological activity of the selected liverwort constituents as well as the hemi- and total synthesis of some biologically active compounds are summarized.

  8. Catalogue of the bryophytes of Sulawesi. Supplement 1: new species records

    NARCIS (Netherlands)

    Ariyanti, N.S.; Gradstein, S.R.; Sporn, S.G.; Angelika, R.; Tan, B.C.

    2009-01-01

    We report 177 bryophyte species (61 mosses, 115 liverworts, 1 hornwort) new to Sulawesi, raising the total number of bryophytes species recorded from the island to 653. The new combination Chiloscyphus morobeanus (Piippo) Gradst. comb. nov. is made.

  9. Contribution to knowledge of the bryophyte flora of the western Alps (Italy, France

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    Sabovljević M.

    2006-01-01

    Full Text Available The study is a contribution to knowledge of the bryophyte flora of the Alps. The huge bryophyte collection made during 1997 in the Western Alps is presented. A total of 152 bryophyte species were recorded, including 113 mosses and 39 hepatics.

  10. Contribution to knowledge of the bryophyte flora of the western Alps (Italy, France)

    OpenAIRE

    Sabovljević M.

    2006-01-01

    The study is a contribution to knowledge of the bryophyte flora of the Alps. The huge bryophyte collection made during 1997 in the Western Alps is presented. A total of 152 bryophyte species were recorded, including 113 mosses and 39 hepatics.

  11. Bryophytes from Simeonof Island in the Shumagin Islands, southwestern Alaska

    Science.gov (United States)

    Schofield, W.B.; Talbot, S. S.; Talbot, S.L.

    2004-01-01

    Simeonof Island is located south of the Alaska Peninsula in the hyperoceanic sector of the middle boreal subzone. We examined the bryoflora of Simeonof Island to determine species composition in an area where no previous collections had been reported. This field study was conducted in sites selected to represent the spectrum of environmental variation within Simeonof Island. Data were analyzed using published reports to compare bryophyte distribution patterns at three levels, the Northern Hemisphere, North America, and Alaska. A total of 271 bryophytes were identified: 202 mosses and 69 liverworts. The annotated list of species for Simeonof Island expands the known range for many species and fills distribution gaps within Hulte??n's Western Pacific Coast district. Maps and notes on the distribution of 14 significant distribution records are presented. Compared with bryophyte distribution in the Northern Hemisphere, the bryoflora of Simeonof Island primarily includes taxa of boreal (55%), temperate (20%), arctic (10%), and cosmopolitan (8%) distribution; 6% of the moss flora are western North America endemics. A description of the bryophytes present in the vegetation and habitat types is provided as is a quantitative analysis of the most frequently occurring bryophytes in crowberry heath.

  12. Metal accumulation by stream bryophytes, related to chemical speciation

    Energy Technology Data Exchange (ETDEWEB)

    Tipping, E. [Centre for Ecology and Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP (United Kingdom)], E-mail: et@ceh.ac.uk; Vincent, C.D.; Lawlor, A.J.; Lofts, S. [Centre for Ecology and Hydrology, Lancaster Environment Centre, Library Avenue, Bailrigg, Lancaster LA1 4AP (United Kingdom)

    2008-12-15

    Metal accumulation by aquatic bryophytes was investigated using data for headwater streams of differing chemistry. The Windermere Humic Aqueous Model (WHAM) was applied to calculate chemical speciation, including competitive proton and metal interactions with external binding sites on the plants. The speciation modelling approach gives smaller deviations between observed and predicted bryophyte contents of Cu, Zn, Cd and Pb than regressions based on total filtered metal concentrations. If all four metals, and Ni, are considered together, the WHAM predictions are superior at the 1% level. Optimised constants for bryophyte binding by the trace metals are similar to those for humic substances and simple carboxylate ligands. Bryophyte contents of Na, Mg and Ca are approximately explained by binding at external sites, while most of the K is intracellular. Oxide phases account for some of the Al, and most of the Mn, Fe and Co. - Speciation modelling can be used to interpret the accumulation of Ni, Cu, Zn, Cd and Pb by bryophytes, supporting its use to quantify trace metal bioavailability in the field.

  13. Bryophytes and lichens: small but indispensable forest dwellers

    Science.gov (United States)

    Hutten, Martin; Woodward, Andrea

    2002-01-01

    * What is a Bryophyte? * Bryophytes are the small green plants commonly known as mosses, liverworts and hornworts. Compared to plants, they have primitive tissues for conducting food and water, and they lack a protective outer surface to maintain water balance. Most bryophytes, because they lack tissues such as roots, obtain their water through direct surface contact with their environment. During dry weather they have the capacity to withstand complete dehydration. Bryophytes that are dry may appear dead but will regain normal function when moisture is available. Instead of producing seeds, bryophytes can either reproduce sexually by means of spores, or asexually when small pieces break off and grow into new individuals. * What is a Lichen? * Lichens are dual organisms consisting of a fungus and an alga or a cyanobacterium. The fungus provides the alga with structure, protection, nutrients, and water absorbed from the atmosphere and the substrate (e.g., soil, rotten logs, tree branches). In return, the alga provides carbohydrates from photosynthesis to the fungus. Algae from some lichens grow independently of the fungus, but in lichen form, the algae can inhabit more challenging environments than when growing alone. Most lichens can reproduce asexually. They either produce specialized propagules containing both partners, or parts of the lichen simply break, allowing both the fungus and the alga to disperse together. In some lichens, the fungal partner reproduces sexually by releasing spores, but the partner alga must be present in order for a lichen to reform.

  14. Living together and living apart: the sexual lives of bryophytes.

    Science.gov (United States)

    Haig, David

    2016-10-19

    Haploid gametophytes of bryophytes spread by clonal growth but mate locally, within an area defined by the range of sperm movement. Rarity of establishment from spores or vegetative competition can result in unisexual populations unable to reproduce sexually. Females typically outcompete males, probably because females expend fewer resources than males on the production of gametes. Extreme sexual dimorphism-tiny males growing as epiphytes on much larger females-has evolved many times. Haploid selfing is common in bryophytes with bisexual gametophytes, and results in completely homozygous sporophytes. Spores from these sporophytes recapitulate the genotype of their single haploid parent. This process can be considered analogous to 'asexual' reproduction with 'sexual' reproduction occurring after rare outcrossing between haploid parents. Ferns also produce bisexual haploid gametophytes but, unlike bryophytes, haploid outcrossing predominates over haploid selfing. This difference is probably related to clonal growth and vegetative competition occurring in the haploid but not the diploid phase in bryophytes, but the reverse in ferns. Ferns are thereby subject to stronger inbreeding depression than bryophytes.This article is part of the themed issue 'Weird sex: the underappreciated diversity of sexual reproduction'.

  15. Bryophytes of beach forests in Chon Buri Province, Thailand

    Directory of Open Access Journals (Sweden)

    Phiangphak Sukkharak

    2014-10-01

    Full Text Available An investigation of bryophyte diversity of three beach forests including Had Tung Prong, Had Tein Talay, and the beach forest in Thai Island and Sea Natural History Museum in Chon Buri Province, Thailand, was carried out. From 137 enumerated specimens, 16 species (6 mosses, 10 liverworts in 12 genera (5 mosses, 7 liverworts and eight families (5 mosses, 3 liverworts were found. Among those the most common families of mosses are Fissidentaceae (2 species and the most common families of liverwort are Lejeuneaceae (8 species. A comparison of species richness among the three areas revealed that the highest species richness of bryophytes was found in Had Tung Prong. Moreover, of all bryophyte species found, Weissia edentula Mitt. was the most common one.

  16. Estimation of stand-level leaf area for boreal bryophytes.

    Science.gov (United States)

    Bond-Lamberty, Ben; Gower, Stith T

    2007-04-01

    Bryophytes dominate the carbon and nitrogen cycling of many poorly drained terrestrial ecosystems and are important in the vegetation-atmosphere exchange of carbon and water, yet few studies have estimated their leaf area at the stand scale. This study quantified the bryophyte-specific leaf area (SLA) and leaf area index (LAI) in a group of different-aged boreal forest stands in well and poorly drained soils. Species-specific SLA (for three feather mosses, four Sphagnum spp. and Aulacomnium palustre mixed with Tomentypnum nitens) was assessed by determining the projected area using a flatbed scanner and cross-sectional geometry using a dissecting microscope. The hemisurface leaf area was computed as the product of SLA and live biomass and was scaled by coverage data collected at all stands. Pleurozium schreberi dominated the spatial coverage, biomass and leaf area in the well-drained stands, particularly the oldest, while S. fuscum and A. palustre were important in the poorly drained stands. Live moss biomass ranged from 47 to 230 g m(-2) in the well-drained stands dominated by feather mosses and from 102 to 228 g m(-2) in the poorly drained stands. Bryophyte SLA varied between 135 and 473 cm(2) g(-1), for A. palustre and S. capillifolium, respectively. SLA was strongly and significantly affected by bryophyte species, but did not vary between stands; in general, there was no significant difference between the SLA of non-Sphagnum mosses. Bryophyte LAI increased with stand age, peaking at 3.1 and 3.7 in the well and poorly drained stands, respectively; this represented approximately 40% of the overstory LAI in the well-drained stands and 100-1,000% in the poorly drained stands, underscoring the important role bryophytes play in the water and carbon budgets of these boreal forests.

  17. Influence of heavy metal pollution on lichens and bryophytes

    Energy Technology Data Exchange (ETDEWEB)

    Rao, D.N.; Robitaille, G.; LeBlanc, F.

    1977-05-01

    A close correlation was observed between metal accumulation levels and phytosociological and physiological changes produced in lichens and bryophytes in a sulfur dioxide and heavy metal polluted area around a copper smelter in Murdochville, Canada. This observation has prompted a discussion of some of the past and present research on ecology, phytosociology, and physiology of lichens and bryophytes with respect to heavy metal pollution. Hopefully this will lead to a better understanding of the use of these plants in the diagnosis of heavy metal pollution. Data are received on the accumulation of Ba, Cu, Pb, Sr and Zn in certain mosses and their corresponding substrates.

  18. Bryophyte responses to microclimatic edge effects across riparian buffers.

    Science.gov (United States)

    Stewart, Katherine J; Mallik, Azim U

    2006-08-01

    Although riparian buffers are an important aspect of forest management in the boreal forest of Canada, little is known about the habitat conditions within buffers, due in part to complex edge effects in response to both the upland clearcut and the stream. We investigated microclimatic conditions and bryophyte growth and vitality in seven locations between the stream edge and 60 m into the upland undisturbed conifer forests and at the clearcut sites with riparian buffer 30 km northwest of Thunder Bay, Ontario, Canada. We hypothesized that the growth and vitality of a pleurocarpous moss, Hylocomium splendens, and an acrocarpous moss, Polytrichum commune, would be directly related to the microclimatic gradients detected. We further hypothesized that sensitivity of the bryophytes to environmental factors will vary depending on their life form type, i.e., pleurocarpous moss will respond differently than the acrocarpous moss. Both bryophyte species were transplanted in pots and placed at 10-m intervals along 60-m transects perpendicular to the stream across the buffer and undisturbed sites. Bryophyte growth, cover, and vitality, as well as microclimatic parameters and plant cover, were measured over the summer in 2003. The riparian buffers were simultaneously affected by microclimatic gradients extending from both the clearcut edge and the riparian-upland ecotonal edge. Both bryophyte species responded to changes in the microclimatic conditions. However, vapor pressure deficit (VPD) was the most important factor influencing the growth of H. splendens, whereas for P. commune growth soil moisture was most important. Our study confirms earlier findings that interior forest bryophytes such as H. splendens can be used as indicators to monitor edge effects and biodiversity recovery following forest harvesting. We demonstrate that growth and vitality of these bryophytes reflect the prevailing near-ground microclimatic conditions at the forest edges. Abundance estimates of such

  19. Forestry impacts on the hidden fungal biodiversity associated with bryophytes.

    Science.gov (United States)

    Davey, Marie L; Kauserud, Håvard; Ohlson, Mikael

    2014-10-01

    Recent studies have revealed an unexpectedly high, cryptic diversity of fungi associated with boreal forest bryophytes. Forestry practices heavily influence the boreal forest and fundamentally transform the landscape. However, little is known about how bryophyte-associated fungal communities are affected by these large-scale habitat transformations. This study assesses to what degree bryophyte-associated fungal communities are structured across the forest successional stages created by current forestry practices. Shoots of Hylocomium splendens were collected in Picea abies dominated forests of different ages, and their associated fungal communities were surveyed by pyrosequencing of ITS2 amplicons. Although community richness, diversity and evenness were relatively stable across the forest types and all were consistently dominated by ascomycete taxa, there was a marked shift in fungal community composition between young and old forests. Numerous fungal operational taxonomic units (OTUs) showed distinct affinities for different forest ages. Spatial structure was also detected among the sites, suggesting that environmental gradients resulting from the topography of the study area and dispersal limitations may also significantly affect bryophyte-associated fungal community structure. This study confirms that Hylocomium splendens hosts an immense diversity of fungi and demonstrates that this community is structured in part by forest age, and as such is highly influenced by modern forestry practices.

  20. Patterns of bryophyte diversity in arable fields of Lithuania

    Directory of Open Access Journals (Sweden)

    Danguolė Andriušaitytė

    2013-03-01

    Full Text Available The paper presents research data on bryophyte diversity in arable land throughout the territory of Lithuania. The bryoflora was analyzed regarding systematic structure and morphological forms, life-history strategies, mode of reproduction and frequency of species. Bryophyte diversity in arable fields of Lithuania was compared with that of Slovakia and the British Isles, which are positioned in different geographical regions of Europe. A total of 97 species of bryophytes of 25 families and 48 genera were ascertained. Dominance of acrocarpous mosses and thalloid liverworts, high representation of Pottiaceae, Bryaceae, Mielichhoferiaceae and Ricciaceae families as well as Bryum, Dicranella, Pohlia and Riccia genera, wide distribution of annual shuttles and ephemeral colonists, high reproduction effort of the species (frequent sporophytes and asexual propagules were specific features of the bryophytes of the studied habitats as a result of adaptations to regular disturbances. The distribution of species into six frequency groups seemed to be uneven. The most abundant group of species with the lowest frequency (1–3 records covered 53.6% of all species. The group contained about 90% of all many-year potential life span species recorded in the habitat. Species with short life span were distributed quite evenly throughout frequency groups. No regionally-specific species were ascertained in the studied habitat. Most of arable-land-specific species recorded in Lithuania is distributed throughout different regions of Europe.

  1. The lichen and bryophyte vegetation of Cuverville Island, Antarctica

    NARCIS (Netherlands)

    de Leeuw, C; Aptroot, A; van Zanten, B

    1998-01-01

    In the Antarctic summer of 1993 the vegetation of Cuverville Island, a small island near the west coast of the Antarctic Peninsula, was mapped and described. Eleven different plant communities of algae, lichens, bryophytes and spermatophytes have been distinguished. The 51 species Vary from endemic

  2. A note on the Bryophytes of the Maltese Islands

    NARCIS (Netherlands)

    Gradstein, S.R.

    1972-01-01

    A small set of bryophytes collected on the islands of Malta and Gozo in April-May, 1968, and April, 1969, by K. U. Kramer and L. Y. Th. Westra (Utrecht) was handed to the author for identification. The results are presented here as a supplement to a paper on the vascular plants of the Maltese island

  3. Inventory of Bryophytes in the “Bulgarka” Nature Park

    Directory of Open Access Journals (Sweden)

    Plamen S. Stoyanov

    2016-06-01

    Full Text Available This study reports data on the diversity of bryophytes in the Bulgarka Nature Park. The registered 55 species belonged to 23 families and 46 genera. Six species were with conservationstatus; 2 were assessed as Not Evaluated. The main threats were assessed and measures towardsbryophyte conservation were proposed.

  4. Turnover of recently assimilated carbon in arctic bryophytes.

    Science.gov (United States)

    Street, L E; Subke, J A; Sommerkorn, M; Heinemeyer, A; Williams, M

    2011-10-01

    Carbon (C) allocation and turnover in arctic bryophytes is largely unknown, but their response to climatic change has potentially significant impacts on arctic ecosystem C budgets. Using a combination of pulse-chase experiments and a newly developed model of C turnover in bryophytes, we show significant differences in C turnover between two contrasting arctic moss species (Polytrichum piliferum and Sphagnum fuscum). (13)C abundance in moss tissues (measured up to 1 year) and respired CO(2) (traced over 5 days) were used to parameterise the bryophyte C model with four pools representing labile and structural C in photosynthetic and stem tissue. The model was optimised using an Ensemble Kalman Filter to ensure a focus on estimating the confidence intervals (CI) on model parameters and outputs. The ratio of aboveground NPP:GPP in Polytrichum piliferum was 23% (CI 9-35%), with an average turnover time of 1.7 days (CI 1.1-2.5 days). The aboveground NPP:GPP ratio in Sphagnum fuscum was 43% (CI 19-65%) with an average turnover time of 3.1 days (CI 1.6-6.1 days). These results are the first to show differences in C partitioning between arctic bryophyte species in situ and highlight the importance of modelling C dynamics of this group separately from vascular plants for a realistic representation of vegetation in arctic C models.

  5. Biochemical and Molecular Mechanisms of Desiccation Tolerance in Bryophytes

    Science.gov (United States)

    Bryophytes, because they descend from the earliest branching events in the phylogeny of land plants, hold an important position in our investigations into the mechanisms by which plants respond to dehydration and by what paths such mechanisms have evolved. This is true regardless of what aspect of p...

  6. Bryophyte spore germinability is inhibited by peatland substrates

    Science.gov (United States)

    Bu, Zhao-Jun; Li, Zhi; Liu, Li-Jie; Sundberg, Sebastian; Feng, Ya-Min; Yang, Yun-He; Liu, Shuang; Song, Xue; Zhang, Xing-Lin

    2017-01-01

    Bryophyte substrates and species may affect spore germination through allelopathy. Polytrichum strictum is currently expanding in peatlands in north-eastern China - is this an effect of its superior spore germinability or do its gametophytes have a stronger allelopathic effect than do Sphagnum? We conducted a spore burial experiment to test the effect of species identity, substrate and water table depth (WTD) on spore germinability and bryophyte allelopathic effect with P. strictum and two Sphagnum species (S. palustre and S. magellanicum). After 5 months of burial during a growing season, the spores were tested for germinability. Allelopathic effect of bryophyte substrates was assessed by the difference between spore germinability after being stored inside or outside the substrates. After burial, more than 90% of the spores lost their germinability across all three species due to ageing and allelopathy. Spore germinability differed among species, where the spores in S. palustre had a higher germination frequency than those in P. strictum. The three bryophytes maintained a higher germinability in Sphagnum than in Polytrichum hummocks, probably due to a stronger allelopathic effect of P. strictum. Water table drawdown by 10 cm increased germinability by more than 60% across the three species. The study indicates that P. strictum does not possess an advantage regarding spore germination but rather its gametophytes have a stronger allelopathic effect. Due to the weaker inhibitive effect of Sphagnum gametophytes, P. strictum may have a potential establishment superiority over Sphagnum in peatlands, in addition to a better drought tolerance, which may explain its current expansion.

  7. Total flavonoid concentrations of bryophytes from Tianmu Mountain, Zhejiang Province (China): Phylogeny and ecological factors.

    Science.gov (United States)

    Wang, Xin; Cao, Jianguo; Dai, Xiling; Xiao, Jianbo; Wu, Yuhuan; Wang, Quanxi

    2017-01-01

    The flavonoids in bryophytes may have great significance in phylogeny and metabolism research. However, to date there has been little research on bryophyte metabolites, especially flavonoids. To redress this somewhat, we determined flavonoid concentrations of bryophytes from Tianmu Mountain through a colorimetric assay and considered the factors influencing the results. This is the first time that the flavonoid contents of bryophytes have been examined in detail. The results revealed a range of total flavonoid concentrations in 90 samples collected from Tianmu Mountain from 1.8 to 22.3 mg/g (w/w). The total flavonoid contents of liverworts were generally higher than those of mosses; acrocarpous mosses had generally higher values than that of pleurocarpous mosses. The total flavonoid contents of bryophytes growing at lower light levels were general higher than those growing in full-sun. The total flavonoid contents of epiphytic bryophytes were highest, while those of aquatic bryophytes were the lowest. Total flavonoid contents of species growing at low-latitudes were much higher than those at high-latitude individuals. In conclusion, total flavonoid contents of bryophytes have some connection with plant phylogeny; more flavonoids might be contained in relatively primitive bryophytes. Meanwhile, the effects of ecological factors on total flavonoid contents of bryophytes exist; light and habitat (especially tree habitat and river habitat) might be representative factor.

  8. Total flavonoid concentrations of bryophytes from Tianmu Mountain, Zhejiang Province (China): Phylogeny and ecological factors

    Science.gov (United States)

    Cao, Jianguo; Dai, Xiling; Xiao, Jianbo; Wu, Yuhuan; Wang, Quanxi

    2017-01-01

    The flavonoids in bryophytes may have great significance in phylogeny and metabolism research. However, to date there has been little research on bryophyte metabolites, especially flavonoids. To redress this somewhat, we determined flavonoid concentrations of bryophytes from Tianmu Mountain through a colorimetric assay and considered the factors influencing the results. This is the first time that the flavonoid contents of bryophytes have been examined in detail. The results revealed a range of total flavonoid concentrations in 90 samples collected from Tianmu Mountain from 1.8 to 22.3 mg/g (w/w). The total flavonoid contents of liverworts were generally higher than those of mosses; acrocarpous mosses had generally higher values than that of pleurocarpous mosses. The total flavonoid contents of bryophytes growing at lower light levels were general higher than those growing in full-sun. The total flavonoid contents of epiphytic bryophytes were highest, while those of aquatic bryophytes were the lowest. Total flavonoid contents of species growing at low-latitudes were much higher than those at high-latitude individuals. In conclusion, total flavonoid contents of bryophytes have some connection with plant phylogeny; more flavonoids might be contained in relatively primitive bryophytes. Meanwhile, the effects of ecological factors on total flavonoid contents of bryophytes exist; light and habitat (especially tree habitat and river habitat) might be representative factor. PMID:28263997

  9. Stochastic processes dominate during boreal bryophyte community assembly.

    Science.gov (United States)

    Fenton, Nicole J; Bergeron, Yves

    2013-09-01

    Why are plant species found in certain locations and not in others? The study of community assembly rules has attempted to answer this question, and many studies articulate the historic dichotomy of deterministic (predictable niches) vs. stochastic (random or semi-random processes). The study of successional sequences to determine whether they converge, as would be expected by deterministic theory, or diverge, as stochastic theory would suggest, has been one method used to investigate this question. In this article we ask the question: Do similar boreal bryophyte communities develop in the similar habitat created by convergent succession after fires of different severities? Or do the stochastic processes generated by fires of different severity lead to different communities? Specifically we predict that deterministic structure will be more important for large forest-floor species than stochastic processes, and that the inverse will be true for small bryophyte species. We used multivariate regression trees and model selection to determine the relative weight of structure (forest structure, substrates, soil structure) and processes (fire severity) for two groups of bryophyte species sampled in 12 sites (seven high-severity and five low-severity fires). Contrary to our first hypothesis, processes were as important for large forest-floor bryophytes as for small pocket species. Fire severity, its interaction with the quality of available habitat, and its impact on the creation of biological legacies played dominant roles in determining community structure. In this study, sites with nearly identical forest structure, generated via convergent succession after high- and low-severity fire, were compared to see whether these sites supported similar bryophyte communities. While similar to some degree, both the large forest-floor species and the pocket species differed after high-severity fire compared to low-severity fire. This result suggests that the "how," or process of

  10. Bryophytes for Beginners: The Usability of a Printed Dichotomous Key versus a Multi-Access Computer-Based Key for Bryophyte Identification

    Science.gov (United States)

    Stagg, Bethan C.; Donkin, Maria E.; Smith, Alison M.

    2015-01-01

    Bryophytes are a rewarding study group in field biology and the UK bryophyte flora has international importance to biodiversity conservation. We designed an identification key to common woodland moss species and compared the usability of two formats, web-based multi-access and printed dichotomous key, with undergraduate students. The rate of…

  11. [Species diversity of bryophytes in West Tianmu Mountain of Zhejiang Province].

    Science.gov (United States)

    Li, Fenxia; Wang, Youfang; Liu, Li; Yang, Shuzhen

    2006-02-01

    In this paper, an investigation was made on the bryophytes at different altitudes of West Tianmu Mountain, with their species composition, similarity, and alpha- and beta-diversities. The results showed that at altitude 1100 m, the bryophytes under deciduous broad-leaved forest had the highest species number and richness, and the highest similarity with the bryophytes under deciduous broad-leaved shrub at 1300 m. The beta diversity index at altitude 800-1100 m was the largest, suggesting an obvious change and alternation of bryophyte species there. At altitude 1100 m, the species diversity of bryophytes was the highest, where should be the key area for bryophyte diversity conservation in West Tianmu Mountain.

  12. Effects of urban particulate deposition on microbial communities living in bryophytes: an experimental study.

    Science.gov (United States)

    Meyer, C; Bernard, N; Moskura, M; Toussaint, M L; Denayer, F; Gilbert, D

    2010-10-01

    Our previous in situ study showed that bryophyte-microorganism complexes were affected by particulate atmospheric pollution. Here, the effect of urban particulate wet deposits on microbial communities living in bryophytes was studied under controlled conditions. An urban particulate solution was prepared with particles extracted from analyzer' filters and nebulized on bryophytes in treatments differing in frequency and quantity. The bryophytes did not accumulate metallic trace elements, which were present in very weak concentrations. However, in treated microcosms the total microbial biomass and the biomasses of cyanobacteria, active testate amoebae and fungi significantly decreased in response to the deposition of particles. These results confirm that microbial communities living in terrestrial bryophytes could be more sensitive indicators of atmospheric pollution than bryophytes. Moreover, they suggest that unicellular predators--such as testate amoebae--could be especially useful microbial indicators, since they seem to be both directly and indirectly affected by pollution.

  13. N and P addition inhibits growth of rich fen bryophytes

    DEFF Research Database (Denmark)

    Andersen, Dagmar Kappel; Ejrnæs, Rasmus; Riis, Tenna

    2016-01-01

    vernicosus and paludella squarrosa) rich fen bryophytes were grown in mixed culture and subjected to rainwater or groundwater and three levels of N (0, 1 and 3 mg N L-1) and P (0, 0.05 and 0.1 mg P NL-1). All species responded negatively to higher N-levels and three of four species responded negatively...... to rainwater and higher P-levels. C. cuspidata had highest relative growth rate in all treatments, and the infrequently occurringrare species had lower relative growth rate and were more negatively affected by high levels of N than the frequently occurringcommon species. A negative effect of rainwater seemed...... to be caused by higher background levels of N in rainwater compared to groundwater rather than a pH-effect per se. We found a negative effect of high initial bryophyte density in three of four species indicating density dependent inhibition between species.We suggest that maintenance of oligotrophic conditions...

  14. Bryophytes: liverworts, mosses, and hornworts: extraction and isolation procedures.

    Science.gov (United States)

    Asakawa, Yoshinori; Ludwiczuk, Agnieszka

    2013-01-01

    There are more than 20,000 species of bryophytes in the world. Among them, almost of liverworts (Marchantiophyta) possess beautiful blue, yellow colored or colorless cellular oil bodies from which over several hundred new terpenoids, acetogenins, and aromatic compounds including flavonoids with more than 40 new carbon skeletons have been isolated. Some of the isolated compounds from liverworts show antimicrobial, antifungal, antiviral, allergenic contact dermatitis, cytotoxicity, insect antifeedant and mortality, antioxidant, nitric oxide (NO) production and plant growth inhibitory, neurotrophic and piscicidal activity, tublin polymerization inhibitory, muscle relaxing, and liver X-receptor (LXR)α agonist and (LXR)β antagonist activities, among others. The bio- and chemical diversity, chemical analysis of bryophytes including extraction, distillation, purification, TLC, GC and GC-MS, and HPLC analysis of oil bodies of liverworts are surveyed.

  15. Ecology and conservation of bryophytes and lichens on Fagus sylvatica

    OpenAIRE

    Fritz, Örjan

    2009-01-01

    Environmental factors related to the occurrence of epiphytic bryophytes and lichens were examined in beech (Fagus sylvatica) forests in the Province of Halland, Sweden. Patterns in species composition and species number at different temporal and spatial scales were analyzed with emphasis on species of conservation concern (i.e. red-listed and indicator species). (I) At stand level, the availability of substrate, a high stand age and forest continuity were the most important factors explaining...

  16. Shifts in bryophyte carbon isotope ratio across an elevation × soil age matrix on Mauna Loa, Hawaii: do bryophytes behave like vascular plants?

    Science.gov (United States)

    Waite, Mashuri; Sack, Lawren

    2011-05-01

    The carbon isotope ratio (δ(13)C) of vascular plant leaf tissue is determined by isotope discrimination, primarily mediated by stomatal and mesophyll diffusion resistances and by photosynthetic rate. These effects lead to predictable trends in leaf δ(13)C across natural gradients of elevation, irradiance and nutrient supply. Less is known about shifts in δ(13)C for bryophytes at landscape scale, as bryophytes lack stomata in the dominant gametophyte phase, and thus lack active control over CO(2) diffusion. Twelve bryophyte species were sampled across a matrix of elevation and soil ages on Mauna Loa, Hawaii Island. We tested hypotheses based on previous findings for vascular plants, which tend to have less negative δ(13)C at higher elevations or irradiances, and for leaves with higher leaf mass per area (LMA). Across the matrix, bryophytes spanned the range of δ(13)C values typical of C(3) vascular plants. Bryophytes were remarkably similar to vascular plants in exhibiting less negative δ(13)C with increasing elevation, and with lower overstory cover; additionally δ(13)C was related to bryophyte canopy projected mass per area, a trait analogous to LMA in vascular plants, also correlated negatively with overstory cover. The similarity of responses of δ(13)C in bryophytes and vascular plants to environmental factors, despite differing morphologies and diffusion pathways, points to a strong direct role of photosynthetic rate in determining δ(13)C variation at the landscape scale.

  17. A Preliminary Study of Bryophytes in Enggano Island, Bengkulu, Indonesia

    Directory of Open Access Journals (Sweden)

    Ainun Nadhifah

    2016-09-01

    Full Text Available Enggano Island is one of the outer islands  that belongs to the Province of Bengkulu. Furthermore, there is very limited information about the diversity of bryophyte from Sumatera, especially in lowland forest, Enggano Island. The aim of this research was to provide the initial information related to the diversity of bryophytes in Enggano. The research was conducted in six forests i.e. primary, secondary and degraded forests. The results showed that 32 number of collection from 14 families, 21 genera, and 32 species were identified. Leceuneaceae was common family for liverworts while the mosses family was dominated by Hypnaceae. None of the hornworts were found in this study. Some species identified (Taxyphyllum sp., Vesicularia sp., Riccardia sp., and Thuidium sp. have the potential benefit and biological activity. Two genera were new records to Sumatra, Gongylanthus, and Symphyogyna. Moreover, Gongylanthus sp. and Symphyogyna sp. have important records related to the habitat.How to CiteNadhifah, A., & Surya, M. I. (2016. A Preliminary Study of Bryophytes in Enggano Island, Bengkulu, Indonesia. Biosaintifika: Journal of Biology & Biology Education, 8(2, 201-205.

  18. Estimating impacts of lichens and bryophytes on global biogeochemical cycles

    Science.gov (United States)

    Porada, Philipp; Weber, Bettina; Elbert, Wolfgang; Pöschl, Ulrich; Kleidon, Axel

    2014-02-01

    Lichens and bryophytes may significantly affect global biogeochemical cycles by fixation of nitrogen and biotic enhancement of surface weathering rates. Most of the studies suggesting these effects, however, are either conceptual or rely on upscaling of regional estimates to obtain global numbers. Here we use a different method, based on estimates of net carbon uptake, to quantify the impacts of lichens and bryophytes on biogeochemical cycles at the global scale. We focus on three processes, namely, nitrogen fixation, phosphorus uptake, and chemical weathering. Our estimates have the form of potential rates, which means that we quantify the amount of nitrogen and phosphorus needed by the organisms to build up biomass, also accounting for resorption and leaching of nutrients. Subsequently, we use potential phosphorus uptake on bare ground to estimate chemical weathering by the organisms, assuming that they release weathering agents to obtain phosphorus. The predicted requirement for nitrogen ranges from 3.5 to 34 Tgyr-1 and for phosphorus it ranges from 0.46 to 4.6 Tgyr-1. Estimates of chemical weathering are between 0.058 and 1.1 km3 yr-1 of rock. These values seem to have a realistic order of magnitude, and they support the notion that lichens and bryophytes have the potential to play an important role for biogeochemical cycles.

  19. The Use of Bryophytes as Indicators of Hydric Soils and Wetland Hydrology during Wetland Delineations in the United States

    Science.gov (United States)

    2010-09-01

    2001), describes the ecological conditions associated with the habitats of European bryophytes , including available moisture, pH, substrate ...much is still unknown about bryophyte biology and ecology , the absence of a bryophyte species in a given habitat indicates less than its presence...Frego 2007). Species with broad geographic ranges and wide ecological tolerances are less likely to make useful bio-indicators. Most bryophytes

  20. Bryophyte colonization history of the virgin volcanic island Surtsey, Iceland

    Directory of Open Access Journals (Sweden)

    G. V. Ingimundardóttir

    2014-03-01

    Full Text Available The island Surtsey was formed in a volcanic eruption south of Iceland in 1963–1967 and has since then been protected and monitored by scientists. The first two moss species were found on Surtsey as early as 1967 and several new bryophyte species were discovered every year until 1973 when regular sampling ended. Systematic bryophyte inventories in a grid of 100 m × 100 m quadrats were made in 1971 and 1972. The number of observed species almost doubled between years with 36 species found in 1971 and 72 species in 1972. Here we report results from an inventory in 2008, when every other of the grid's quadrats were searched for bryophytes. Despite lower sampling intensity than in 1972, distributional expansion and contraction of earlier colonists was revealed as well as presence of new colonists. A total of 38 species were discovered, 15 of those were not encountered in 1972 and eight had never been reported from Surtsey before (Bryum elegans, Ceratodon heterophyllus, Didymodon rigidulus, Eurhynchium praelongum, Schistidium confertum, S. papillosum, Tortula hoppeana and T. muralis. Habitat loss due to erosion and reduced thermal activity in combination with successional vegetation changes are likely to have played a significant role in the decline of some bryophyte species which were abundant in 1972 (Leptobryum pyriforme, Schistidium apocarpum coll., Funaria hygrometrica, Philonotis spp., Pohlia spp, Schistidium strictum, Sanionia uncinata while others have continued to thrive and expand (e.g. Schistidium maritimum, Racomitrium lanuginosum, R. ericoides, R. fasciculare and Bryum argenteum. Some species (especially Bryum spp. benefit from the formation of new habitats, such as grassland within a gull colony, which was established in 1984. Several newcomers are rarely producing sporophytes on Iceland and unlikely to have dispersed by airborne spores. They are more likely to have been introduced to Surtsey by seagulls in the form of vegetative

  1. Bryophyte colonization history of the virgin volcanic island Surtsey, Iceland

    Science.gov (United States)

    Ingimundardóttir, G. V.; Weibull, H.; Cronberg, N.

    2014-08-01

    The island Surtsey was formed in a volcanic eruption south of Iceland in 1963-1967 and has since then been protected and monitored by scientists. The first two moss species were found on Surtsey as early as 1967 and several new bryophyte species were discovered every year until 1973 when regular sampling ended. Systematic bryophyte inventories in a grid of 100 m × 100 m quadrats were made in 1971 and 1972: the number of observed species doubled, with 36 species found in 1971 and 72 species in 1972. Here we report results from an inventory in 2008, when every other of the grid's quadrats were searched for bryophytes. Despite lower sampling intensity than in 1972, distributional expansion and contraction of earlier colonists was revealed as well as the presence of new colonists. A total of 38 species were discovered, 15 of those were not encountered in 1972 and eight had never been reported from Surtsey before (Bryum elegans, Ceratodon heterophyllus, Didymodon rigidulus, Eurhynchium praelongum, Schistidium confertum, S. papillosum, Tortula hoppeana and T. muralis). Habitat loss due to erosion and reduced thermal activity in combination with successional vegetation changes are likely to have played a significant role in the decline of some bryophyte species which were abundant in 1972 (Leptobryum pyriforme, Schistidium apocarpum coll., Funaria hygrometrica, Philonotis spp., Pohlia spp, Schistidium strictum, Sanionia uncinata) while others have continued to thrive and expand (e.g. Schistidium maritimum, Racomitrium lanuginosum, R. ericoides, R. fasciculare and Bryum argenteum). Some species (especially Bryum spp.) benefit from the formation of new habitats, such as grassland within a gull colony, which was established in 1984. Several newcomers are rarely producing sporophytes on Iceland and are unlikely to have been dispersed by airborne spores. They are more likely to have been introduced to Surtsey by seagulls in the form of vegetative fragments or dispersal agents

  2. Bryophyte colonization history of the virgin volcanic island Surtsey, Iceland

    Directory of Open Access Journals (Sweden)

    G. V. Ingimundardóttir

    2014-08-01

    Full Text Available The island Surtsey was formed in a volcanic eruption south of Iceland in 1963–1967 and has since then been protected and monitored by scientists. The first two moss species were found on Surtsey as early as 1967 and several new bryophyte species were discovered every year until 1973 when regular sampling ended. Systematic bryophyte inventories in a grid of 100 m × 100 m quadrats were made in 1971 and 1972: the number of observed species doubled, with 36 species found in 1971 and 72 species in 1972. Here we report results from an inventory in 2008, when every other of the grid's quadrats were searched for bryophytes. Despite lower sampling intensity than in 1972, distributional expansion and contraction of earlier colonists was revealed as well as the presence of new colonists. A total of 38 species were discovered, 15 of those were not encountered in 1972 and eight had never been reported from Surtsey before (Bryum elegans, Ceratodon heterophyllus, Didymodon rigidulus, Eurhynchium praelongum, Schistidium confertum, S. papillosum, Tortula hoppeana and T. muralis. Habitat loss due to erosion and reduced thermal activity in combination with successional vegetation changes are likely to have played a significant role in the decline of some bryophyte species which were abundant in 1972 (Leptobryum pyriforme, Schistidium apocarpum coll., Funaria hygrometrica, Philonotis spp., Pohlia spp, Schistidium strictum, Sanionia uncinata while others have continued to thrive and expand (e.g. Schistidium maritimum, Racomitrium lanuginosum, R. ericoides, R. fasciculare and Bryum argenteum. Some species (especially Bryum spp. benefit from the formation of new habitats, such as grassland within a gull colony, which was established in 1984. Several newcomers are rarely producing sporophytes on Iceland and are unlikely to have been dispersed by airborne spores. They are more likely to have been introduced to Surtsey by seagulls in the form of vegetative fragments

  3. The Effects of Bryophyte Morphology on Epiphytic Diatom Distribution in the Great Smoky Mountains National Park

    Science.gov (United States)

    Knapp, J. M.; Lowe, R. L.

    2005-05-01

    Diatoms and aquatic bryophytes have specific habitat requirements and are easily accessible in the field, making them ideal taxa for assessing water quality and environmental change. Although they both inhabit the same substrates within streams, there is a dearth of information regarding the relationship between these two indicator organisms. With this study, we examined the relationship between bryophytes and their epiphytic diatom communities from streams in the Great Smoky Mountains National Park. We hypothesized that bryophyte morphologies with more crevices between leaves would provide algae with a more protected micro-environment, resulting in a higher density of diatoms on these taxa compared to bryophytes with greatly exposed leaves. In addition, we also expect that bryophytes rich in crevices will have a high relative abundance of non-rheophilic taxa. Diatom community structure on bryophytes was determined using light microscopy. Using scanning electron microscopy, bryophytes were examined to compare the distribution and density of diatoms on the abnate and adnate surfaces of leaves. Preliminary results indicate that diatom density is not correlated with bryophyte species.

  4. Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes

    Science.gov (United States)

    Song, Liang; Lu, Hua-Zheng; Xu, Xing-Liang; Li, Su; Shi, Xian-Meng; Chen, Xi; Wu, Yi; Huang, Jun-Biao; Chen, Quan; Liu, Shuai; Wu, Chuan-Sheng; Liu, Wen-Yao

    2016-07-01

    Without any root contact with the soil, epiphytic bryophytes must experience and explore poor, patchy, and heterogeneous habitats; while, the nitrogen (N) uptake and use strategies of these organisms remain uncharacterized, which obscures their roles in the N cycle. To investigate the N sources, N preferences, and responses to enhanced N deposition in epiphytic bryophytes, we carried out an in situ manipulation experiment via the 15N labelling technique in an Asian cloud forest. Epiphytic bryophytes obtained more N from air deposition than from the bark, but the contribution of N from the bark was non-negligible. Glycine accounted for 28.4% to 44.5% of the total N in bryophyte tissue, which implies that organic N might serve as an important N source. Increased N deposition increased the total N uptake, but did not alter the N preference of the epiphytic bryophytes. This study provides sound evidence that epiphytic bryophytes could take up N from the bark and wet deposition in both organic and inorganic N forms. It is thus important to consider organic N and bark N sources, which were usually neglected, when estimating the role of epiphytic bryophytes in N cycling and the impacts of N deposition on epiphytic bryophytes in cloud forests.

  5. Contribution to knowledge of the bryophyte flora of Bačka (Vojvodina, Serbia

    Directory of Open Access Journals (Sweden)

    Sabovljević M.

    2006-01-01

    Full Text Available A contribution to knowledge of the poorly known bryophyte flora of Bačka region in Serbia is given in the present paper. The total of bryophyte species recorded in the region is raised from seven to 46. Six nationally threatened and two species threatened on the European level are found in the investigated area.

  6. Species richness and distribution of understorey bryophytes in different forest types in Colombian Amazonia

    NARCIS (Netherlands)

    Benavides, J.C.; Duque, A.J.; Duivenvoorden, J.F.; Cleef, A.M.

    2006-01-01

    The first bryophyte survey results from Colombian Amazonia are presented. Bryophyte species, differentiated into mosses and liverworts, and further into four life-form classes, were sampled in 0.1-ha plots. These plots were distributed over four landscape units in the middle Caquetá area: floodplain

  7. Effects of neighboring vascular plants on the abundance of bryophytes in different vegetation types

    Science.gov (United States)

    Jägerbrand, Annika K.; Kudo, Gaku; Alatalo, Juha M.; Molau, Ulf

    2012-07-01

    Due to the climate change, vegetation of tundra ecosystems is predicted to shift toward shrub and tree dominance, and this change may influence bryophytes. To estimate how changes in growing environment and the dominance of vascular plants influence bryophyte abundance, we compared the relationship of occurrence of bryophytes among other plant types in a five-year experiment of warming (T), fertilization (F) and T + F in two vegetation types, heath and meadow, in a subarctic-alpine ecosystem. We compared individual leaf area among shrub species to confirm that deciduous shrubs might cause severe shading effect. Effects of neighboring functional types on the performance of Hylocomium splendens was also analyzed. Results show that F and T + F treatments significantly influenced bryophyte abundance negatively. Under natural conditions, bryophytes in the heath site were negatively related to the abundance of shrubs and lichens and the relationship between lichens and bryophytes strengthened after the experimental period. After five years of experimental treatments in the meadow, a positive abundance relationship emerged between bryophytes and deciduous shrubs, evergreen shrubs and forbs. This relationship was not found in the heath site. Our study therefore shows that the abundance relationships between bryophytes and plants in two vegetation types within the same area can be different. Deciduous shrubs had larger leaf area than evergreen shrubs but did not show any shading effect on H. splendens.

  8. Higher photosynthetic capacity and different functional trait scaling relationships in erect bryophytes compared with prostrate species.

    Science.gov (United States)

    Wang, Zhe; Liu, Xin; Bao, Weikai

    2016-02-01

    Ecophysiological studies of bryophytes have generally been conducted at the shoot or canopy scale. However, their growth forms are diverse, and knowledge of whether bryophytes with different shoot structures have different functional trait levels and scaling relationships is limited. We collected 27 bryophyte species and categorised them into two groups based on their growth forms: erect and prostrate species. Twenty-one morphological, nutrient and photosynthetic traits were quantified. Trait levels and bivariate trait scaling relationships across species were compared between the two groups. The two groups had similar mean values for shoot mass per area (SMA), light saturation point and mass-based nitrogen (N(mass)) and phosphorus concentrations. Erect bryophytes possessed higher values for mass-based chlorophyll concentration (Chl(mass)), light-saturated assimilation rate (A(mass)) and photosynthetic nitrogen/phosphorus use efficiency. N(mass), Chl(mass) and A(mass) were positively related, and these traits were negatively associated with SMA. Furthermore, the slope of the regression of N(mass) versus Chl(mass) was steeper for erect bryophytes than that for prostrate bryophytes, whereas this pattern was reversed for the relationship between Chl(mass) and A(mass). In conclusion, erect bryophytes possess higher photosynthetic capacities than prostrate species. Furthermore, erect bryophytes invest more nitrogen in chloroplast pigments to improve their light-harvesting ability, while the structure of prostrate species permits more efficient light capture. This study confirms the effect of growth form on the functional trait levels and scaling relationships of bryophytes. It also suggests that bryophytes could be good models for investigating the carbon economy and nutrient allocation of plants at the shoot rather than the leaf scale.

  9. Bryophyte-cyanobacteria associations contribute to ecosystem-N-budget of boreal forest

    Science.gov (United States)

    Salemaa, Maija; Lindroos, Antti-Jussi; Merilä, Päivi; Mäkipää, Raisa; Smolander, Aino

    2014-05-01

    Bryophytes frequently dominate the ground vegetation on the forest floor in boreal region. Northern ecosystems are often nitrogen limited, and therefore biological nitrogen (N2) fixation of bryophyte-associated microbes is an important source of new N. In this study we estimated the N stock of bryophyte layer and the N input rate by N2 fixation of bryophyte-cyanobacteria associations at the ecosystem level. We studied 12 intensively monitored forest ecosystem plots (ICP Forests Level II) along a latitudinal gradient in Finland during 2009-2013. The total biomass and N stock of the bryophytes varied 700-2000 kg ha-1 and 9-23 kg ha-1, respectively. N2 fixation rate associated to bryophytes increased towards the north and was at highest 1-2 kg N ha-1 year-1 (based on the bryophyte biomass in the monitoring plots). This N input was at the same level as the N deposition in the northern Finland (1.5 kg N ha-1 year-1). In comparison, via needle litterfall and other tree litter c.a. 5 kg N ha-1 is annually returned to the nutrient cycle. In southern Finland, very low rates of N2 fixation were found probably because of inhibition by the anthropogenic N deposition. The upper parts of the bryophyte shoots showed 2-3 times higher N2-fixing rate than the lower parts, but differences between Hylocomium splendens and Pleurozium schreberi were minor. However, Dicranum species showed much lower N2 fixation rates compared to these two species. The moisture level of bryophytes and light/temperature conditions regulated strongly the rate of N2-fixing activity. The results showed that the bryophyte layer significantly contributes to the N input and plays an important role in controlling the N and C balances of boreal forests.

  10. Effects of bryophyte and lichen cover on permafrost soil temperature at large scale

    Science.gov (United States)

    Porada, Philipp; Ekici, Altug; Beer, Christian

    2016-09-01

    Bryophyte and lichen cover on the forest floor at high latitudes exerts an insulating effect on the ground. In this way, the cover decreases mean annual soil temperature and can protect permafrost soil. Climate change, however, may change bryophyte and lichen cover, with effects on the permafrost state and related carbon balance. It is, therefore, crucial to predict how the bryophyte and lichen cover will react to environmental change at the global scale. To date, current global land surface models contain only empirical representations of the bryophyte and lichen cover, which makes it impractical to predict the future state and function of bryophytes and lichens. For this reason, we integrate a process-based model of bryophyte and lichen growth into the global land surface model JSBACH (Jena Scheme for Biosphere-Atmosphere Coupling in Hamburg). The model simulates bryophyte and lichen cover on upland sites. Wetlands are not included. We take into account the dynamic nature of the thermal properties of the bryophyte and lichen cover and their relation to environmental factors. Subsequently, we compare simulations with and without bryophyte and lichen cover to quantify the insulating effect of the organisms on the soil. We find an average cooling effect of the bryophyte and lichen cover of 2.7 K on temperature in the topsoil for the region north of 50° N under the current climate. Locally, a cooling of up to 5.7 K may be reached. Moreover, we show that using a simple, empirical representation of the bryophyte and lichen cover without dynamic properties only results in an average cooling of around 0.5 K. This suggests that (a) bryophytes and lichens have a significant impact on soil temperature in high-latitude ecosystems and (b) a process-based description of their thermal properties is necessary for a realistic representation of the cooling effect. The advanced land surface scheme, including a dynamic bryophyte and lichen model, will be the basis for an improved

  11. Bryophyte flora of the Uvac river gorge (Southwest Serbia

    Directory of Open Access Journals (Sweden)

    Veljić M.

    2006-01-01

    Full Text Available In the examined area, 165 taxa were found and identified: 139 taxa from the class Bryopsida and 26 taxa from the class Marchantiopsida. Nine species are red-listed in Serbia. Material was collected from 62 localities, which were analyzed for similarity of chorological and ecological features using the Jaccard similarity index. Analysis of floristic elements and phytogeographic distribution showed that the greatest number of taxa are temperate elements with Holarctic distribution. Results of ecological analysis showed that in regard to the substratum aspect, terricolous, basophilous, and indifferent species were dominant. In relation to the ecological parameter humidity, most species were mesophilous. The majority of identified bryophytes were sciophilous taxa. .

  12. Survey of volatile oxylipins and their biosynthetic precursors in bryophytes.

    Science.gov (United States)

    Croisier, Emmanuel; Rempt, Martin; Pohnert, Georg

    2010-04-01

    Oxylipins are metabolites which are derived from the oxidative fragmentation of polyunsaturated fatty acids. These metabolites play central roles in plant hormonal regulation and defense. Here we survey the production of volatile oxylipins in bryophytes and report the production of a high structural variety of C5, C6, C8 and C9 volatiles of mosses. In liverworts and hornworts oxylipin production was not as pronounced as in the 23 screened mosses. A biosynthetic investigation revealed that both, C18 and C20 fatty acids serve as precursors for the volatile oxylipins that are mainly produced after mechanical wounding of the green tissue of mosses.

  13. Arsenic and mercury in native aquatic bryophytes: differences among species.

    Science.gov (United States)

    Díaz, Santiago; Villares, Rubén; López, Jesús; Carballeira, Alejo

    2013-04-01

    This study investigated the capacities of five species of aquatic bryophytes to accumulate As and Hg from their natural habitats in rivers in Galicia (NW Spain). The distributions of the concentrations of both elements in all species were skewed to the right, with a higher incidence of extreme values in the As data, which may indicate a greater degree of contamination by this metalloid. There were no significant differences in the accumulation of either of the elements between the different species studied, which justifies their combined use as biomonitors of As and Hg, at least in the study area.

  14. Structural characterization and chemical classification of some bryophytes found in Latvia.

    Science.gov (United States)

    Maksimova, Viktorija; Klavina, Laura; Bikovens, Oskars; Zicmanis, Andris; Purmalis, Oskars

    2013-07-01

    Bryophytes are the second largest taxonomic group in the plant kingdom; yet, studies conducted to better understand their chemical composition are rare. The aim of this study was to characterize the chemical composition of bryophytes common in Northern Europe by using elemental, spectral, and non-destructive analytical methods, such as Fourier transform IR spectrometry (FT-IR), solid-phase (13) C-NMR spectrometry, and pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), for the purpose of investigating their chemotaxonomic relationships on the basis of chemical-composition data. The results of all these analyses showed that bryophytes consist mainly of carbohydrates. Judging by FT-IR spectra, the OH groups in combination of CO groups were the most abundant groups. The (13) C-NMR spectra provided information on the presence of such compounds as phenolics and lipids. It was found that the amount of phenolic compounds in bryophytes is relatively small. This finding definitely confirmed the absence of lignin in the studied bryophytes. Cluster analysis was used to better understand differences in the chemical composition of bryophyte samples and to evaluate possible usage of these methods in the chemotaxonomy of bryophytes.

  15. UV-absorbing compounds in subarctic herbarium bryophytes

    Energy Technology Data Exchange (ETDEWEB)

    Huttunen, S. [Botany Division, Department of Biology, P.O. Box 3000, FIN-90 014 University of Oulu (Finland)]. E-mail: satu.huttunen@oulu.fi; Lappalainen, N.M. [Botany Division, Department of Biology, P.O. Box 3000, FIN-90 014 University of Oulu (Finland); Turunen, J. [Botany Division, Department of Biology, P.O. Box 3000, FIN-90 014 University of Oulu (Finland)

    2005-01-01

    The UV-B-absorbing compounds of herbarium specimens of 10 subarctic bryophyte species collected during the years 1926-1996 and available at the Botanical Museum, University of Oulu, were studied. We studied whether herbarium specimens reflect changes in the past radiation climate through their methanol-extractable compounds. The order of gametophytes based on the average amount of total compounds (sum of A{sub 280-320nm}) per mass from the lowest to the highest was Polytrichum commune, Pleurozium schreberi, Hylocomium splendens, Sphagnum angustifolium, Dicranum scoparium, Funaria hygrometrica, Sphagnum fuscum, Sphagnum warnstorfii, Sphagnum capillifolium and Polytrichastrum alpinum, and the amount of UV-B-absorbing compounds per specific surface area correlated with the summertime daily global radiation and latitude. P. alpinum, F. hygrometrica and three Sphagnum species seem to be good indicators for further studies. The amount of UV-B-absorbing compounds revealed no significant trends from the 1920s till the 1990s, with the exception of S. capillifolium, which showed a significant decreasing trend. - UV-B-absorbing compounds in subarctic herbarium bryophytes indicate the radiation climate of the collecting site and time.

  16. Adaptive evolution of rbcL in Conocephalum (Hepaticae, bryophytes).

    Science.gov (United States)

    Miwa, Hidetsugu; Odrzykoski, Ireneusz J; Matsui, Atsushi; Hasegawa, Masami; Akiyama, Hiroyuki; Jia, Yu; Sabirov, Renat; Takahashi, Hideki; Boufford, David E; Murakami, Noriaki

    2009-07-15

    An excess of nonsynonymous substitutions over synonymous ones has been regarded as an important indicator of adaptive evolution or positive selection at the molecular level. We now report such a case for rbcL sequences among cryptic species in Conocephalum (Hepaticae, Bryophytes). This finding can be regarded as evidence of adaptive evolution in several cryptic species (especially in F and JN types) within the genus. Bryophytes are small land plants with simple morphology. We can therefore expect the existence of several biologically distinct units or cryptic species within each morphological species. In our previous study, we found three rbcL types in Asian Conocephalum japonicum (Thunb.) Grolle and also found evidence strongly suggesting that the three types are reproductively isolated cryptic species. Additionally, we examined rbcL sequence variation in six cryptic species of C. conicum (L.) Dumort. previously recognized by allozyme analyses. As a result, we were able to discriminate the six cryptic species based only on their rbcL sequences. We were able to show that rbcL sequence variation is also useful in finding cryptic species of C. conicum.

  17. [Rearing immature horse flies (Diptera: Tabanidae) by using a substrate of bryophytes and sand].

    Science.gov (United States)

    Ferreira, Ruth L M; Rafael, José A

    2006-01-01

    A new method for rearing immature horse flies by using a substrate of bryophytes and sand is described and the advantages of such substrate for maintenance of species with long development periods are discussed.

  18. Hybridization and asymmetric reproductive isolation between the closely related bryophyte taxa Polytrichum commune and P. uliginosum

    NARCIS (Netherlands)

    van der Velde, M; Bijlsma, R

    2004-01-01

    Based on genetic differentiation, the haploid dioecious bryophyte taxa Polytrichum commune and P. uliginosum have been inferred to be completely reproductively isolated. However, analysing diploid sporophytes from a sympatric population for three diagnostic microsatellite markers, we show here that

  19. Bryophytes from the area drained by the Peel and Mackenzie Rivers, Yukon and Northwest Territories, Canada

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This report is on bryophytes from the area drained by the Peel and Mackenzie rivers in the Yukon territory of Canada. The distribution and general ecology of 263...

  20. Bryophyte colonisation and persistense in experimental grassland dominated by vascular plants

    OpenAIRE

    Aude, Erik; Ejrnæs, Rasmus

    2003-01-01

    A three-year multi-factorial microcosms experiment simulating dry grassland was used to test five hypotheses concerning establishment and persistence of bryophytes in grassland vegetation. The experimental treatments included fertilisation, defoliation and species composition of vascular vegetation. ANOVA-modelling showed a significant response of bryophyte species richness to fertilisation (negative) and defoliation (positive). Species composition of vascular vegetation had no effect on bryo...

  1. Bryophyte species richness and composition along an altitudinal gradient in Gongga Mountain, China.

    Directory of Open Access Journals (Sweden)

    Shou-Qin Sun

    Full Text Available An investigation of terrestrial bryophyte species diversity and community structure along an altitudinal gradient from 2,001 to 4,221 m a.s.l. in Gongga Mountain in Sichuan, China was carried out in June 2010. Factors which might affect bryophyte species composition and diversity, including climate, elevation, slope, depth of litter, vegetation type, soil pH and soil Eh, were examined to understand the altitudinal feature of bryophyte distribution. A total of 14 representative elevations were chosen along an altitudinal gradient, with study sites at each elevation chosen according to habitat type (forests, grasslands and accessibility. At each elevation, three 100 m × 2 m transects that are 50 m apart were set along the contour line, and three 50 cm × 50 cm quadrats were set along each transect at an interval of 30 m. Species diversity, cover, biomass, and thickness of terrestrial bryophytes were examined. A total of 165 species, including 42 liverworts and 123 mosses, are recorded in Gongga mountain. Ground bryophyte species richness does not show any clear elevation trend. The terrestrial bryophyte cover increases with elevation. The terrestrial bryophyte biomass and thickness display a clear humped relationship with the elevation, with the maximum around 3,758 m. At this altitude, biomass is 700.3 g m(-2 and the maximum thickness is 8 cm. Bryophyte distribution is primarily associated with the depth of litter, the air temperature and the precipitation. Further studies are necessary to include other epiphytes types and vascular vegetation in a larger altitudinal range.

  2. Contribution of genosystematics to current concepts of phylogeny and classification of bryophytes.

    Science.gov (United States)

    Troitsky, A V; Ignatov, M S; Bobrova, V K; Milyutina, I A

    2007-12-01

    This paper is a survey of the current state of molecular studies on bryophyte phylogeny. Molecular data have greatly contributed to developing a phylogeny and classification of bryophytes. The previous traditional systems of classification based on morphological data are being significantly revised. New data of the authors are presented on phylogeny of Hypnales pleurocarpous mosses inferred from nucleotide sequence data of the nuclear DNA internal transcribed spacers ITS1-2 and the trnL-F region of the chloroplast genome.

  3. Diversity of bryophytes in priority areas for conservation in the Atlantic forest of northeast Brazil

    Directory of Open Access Journals (Sweden)

    Mércia Patrícia Pereira Silva

    2015-03-01

    Full Text Available The northeastern Brazilian Atlantic forest is the region with the greatest diversity of bryophytes in the country. However, knowledge about bryophytes is irregularly distributed among Brazilian regions. Therefore, we aimed to contribute to knowledge about bryophytes on a regional scale in the northeastern Atlantic forest, to identify the centers of bryophyte diversity in that region, and to reiterate the importance and identify locations for which new protected areas should be created. We built a database of bryophytes in 23 locations of the region, based on a literature review and new floristic inventories. To identify the locations of greatest relevance to bryophyte conservation, we considered 1 total and endemic species richness, 2 phylogenetic diversity (PD, and 3 functional diversity (proportion of shade specialists. The northeastern Atlantic rainforest contains 396 spp., representing 26% of the taxa occurring in the country, 13 of which are endemic. Generalist species predominated (164 spp., followed by shade (133 spp. and sun (92 spp. specialists. The Murici Ecological Station had the highest richness, number of endemic species, and phylogenetic diversity.

  4. Complex Mutation and Weak Selection together Determined the Codon Usage Bias in Bryophyte Mitochondrial Genomes

    Institute of Scientific and Technical Information of China (English)

    Bin Wang; Jing Liu; Liang Jin; Xue-Ying Feng; Jian-Qun Chen

    2010-01-01

    Mutation and selection are two major forces causing codon usage biases. How these two forces influence the codon usages in green plant mitochondrial genomes has not been well investigated. In the present study, we surveyed five bryophyte mitochondrial genomes to reveal their codon usagepatterns as well as the determining forces. Three interesting findings were made. First, comparing to Chara vulgaris, an algal species sister to all extant land plants, bryophytes have more G, C-ending codon usages in their mitochondrial genes. This is consistent with the generally higher genomic GC content in bryophyte mitochondria, suggesting an increased mutational pressure toward GC. Second, as indicated by Wright's Nc-GC3s plot, mutation, not selection, is the major force affecting codon usages of bryophyte mitochondrial genes. However, the real mutational dynamics seem very complex. Context-dependent analysis indicated that nucleotide at the 2nd codon position would slightly affect synonymous codon choices. Finally, in bryophyte mitochondria, tRNA genes would apply a weak selection force to finetune the synonymous codon frequencies, as revealed by data of Ser4-Pro-Thr-Val families. In summary,complex mutation and weak selection together determined the codon usages in bryophyte mitochondrial genomes.

  5. Lichen and bryophyte distribution on oak in London in relation to air pollution and bark acidity

    Energy Technology Data Exchange (ETDEWEB)

    Larsen, R.S. [Natural History Museum, Cromwell Road, London SW7 5BD (United Kingdom); Imperial College London, London (United Kingdom); Bell, J.N.B. [Imperial College London, London (United Kingdom); James, P.W. [Natural History Museum, Cromwell Road, London SW7 5BD (United Kingdom); Chimonides, P.J. [Natural History Museum, Cromwell Road, London SW7 5BD (United Kingdom); Rumsey, F.J. [Natural History Museum, Cromwell Road, London SW7 5BD (United Kingdom); Tremper, A. [Kings College, London (United Kingdom); Purvis, O.W. [Natural History Museum, Cromwell Road, London SW7 5BD (United Kingdom)]. E-mail: w.purvis@nhm.ac.uk

    2007-03-15

    Epiphytic lichen and bryophyte distribution and frequency were investigated on the trunks of 145 young oak trees throughout London and surrounding counties, and compared with pollution levels and bark pH. Sixty-four lichen and four bryophyte species were recorded. Three major zones were identified: (i) two central regions with a few lichens, bryophytes absent; (ii) a surrounding region with a more diverse flora including a high cover of nitrophyte lichens; and (iii) an outer region, characterised by species absent from central London, including acidophytes. Nineteen species were correlated with nitrogen oxides and 16 with bark pH, suggesting that transport-related pollution and bark acidity influence lichen and bryophyte distribution in London today. Lichens and bryophytes are responding to factors that influence human and environmental health in London. Biomonitoring therefore has a practical role to assess the effects of measures to improve London's air quality. - Transport-related pollutants and bark acidity influence lichen and bryophyte distribution and abundance in London today.

  6. Vertical distribution of epiphytic bryophytes in Atlantic Forest fragments in northeastern Brazil

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    Hermeson Cassiano de Oliveira

    Full Text Available ABSTRACT The microclimatic gradient established from the forest understory to the canopy provides a range of different conditions for the establishment of bryophytes along the height of a tree. We investigated epiphytic bryophyte communities of four fragments of Atlantic Forest with the aim of describing their vertical zonation and assessing differentiation among the communities of the different fragments. In each fragment, five host trees were selected from which bryophyte samples were collected in four height zones from the base to the canopy. Furthermore, 10 plots were demarcated in each fragment where bryophytes were collected from the understory. In total, 114 bryophyte species were found on the 20 sampled phorophytes, plus an additional 51 species in the understory, for a total of 165 species. Species composition of height zones differed significantly between communities of the trunk base and the canopy. The samples from the understory included 77% of all species. Among all species found, 10 showed a significant preference for a specific height. Around 70% of the bryophyte species grew as mats; this life form occurred in all trees and height zones. The results showed a weak, yet significant, vertical gradient, which differs from what is usually found in the Atlantic Forest.

  7. Assessing airborne pollution effects on bryophytes - lessons learned through long-term integrated monitoring in Austria

    Energy Technology Data Exchange (ETDEWEB)

    Zechmeister, H.G. [Faculty of Life Sciences, University of Vienna, Althanstrasse 14, 1090 Vienna (Austria) and ecotox-Austria, Fleschgasse 22, Vienna (Austria)]. E-mail: harald.zechmeister@univie.ac.at; Dirnboeck, T. [Umweltbundesamt, Spittelauer Laende 5, 1090 Vienna (Austria)]. E-mail: thomas.dirnboeck@umweltbundesamt.at; Huelber, K. [VINCA, Giessergasse 6/7, 1090 Vienna (Austria)]. E-mail: karl.huelber@vinca.at; Mirtl, M. [Umweltbundesamt, Spittelauer Laende 5, 1090 Vienna (Austria)]. E-mail: michael.mirtl@umweltbundesamt.at

    2007-06-15

    The study uses measured and calculated data on airborne pollutants, particularly nitrogen (ranges between 28 to 43 kg N*ha{sup -1}*yr{sup -1}) and sulphur (10 to 18 kg SO{sub 4}-S*ha{sup -1}*yr{sup -1}), in order to assess their long-term (1992 to 2005) effects on bryophytes at the UN-ECE Integrated Monitoring site 'Zoebelboden' in Austria. Bryophytes were used as reaction indicators on 20 epiphytic plots using the IM monitoring method and on 14 terrestrial plots using standardised photography. The plots were recorded in the years 1992, 1993, 1998, and 2004/2005. Most species remained stable in terms of their overall population size during the observed period, even though there were rapid turnover rates of a large percentage of species on all investigated plots. Only a few bryophytes (Hypnum cupressiforme, Leucodon sciuroides) responded unambiguously to N and S deposition. Nitrogen deposition had a weak but significant effect on the distribution of bryophyte communities. However, the time shifts in bryophyte communities did not depend on total deposition of N and S. - Bryophytes show ambiguous response to airborne pollutants during 14 years of monitoring in a forest ecosystem.

  8. [Biomass and carbon storage of ground bryophytes under six types of young coniferous forest plantations].

    Science.gov (United States)

    Bao, Weikai; Lei, Bo; Leng, Li

    2005-10-01

    This paper studied the biomass and carbon storage of the ground bryophytes under young Picea balfouriana (P), Pinus tabulaeformis (Y), Pinus armandii (H), Larix kaempferi (L), Picea balfouriana-Pinus tabulaeformis (P-Y), and Pinus tabulaeformis-Pinus armandii (Y-H) forest plantations in the upper reach of Minjiang River, Sichuan Province. The results showed that total biomass and carbon storage of ground bryophytes were relatively low, being 3.11 - 460.36 kg x hm(-2) and 1.12 +/- 0.03 x 168.95 +/- 0.92 kg x hm(-2), respectively. On plot level, only the bryophyte biomass between forest P and others, and the carbon storage between forest L and others were significantly different. The ground bryophyte had the highest biomass and carbon storage under forest P, while the lowest ones under forest H. Comprehensive analysis suggested that forest type and its structural feature might be the important factors determining the biomass and carbon storage of ground bryophytes, and thinning was an important measure to improve ground bryophyte growth and biomass production.

  9. Exsiccatae in the bryophyte collection of the National Herbarium, Pretoria

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    J. van Rooy

    2013-01-01

    Full Text Available Exsiccatae in the bryophyte collection of the National Herbarium in Pretoria (PRE are catalogued for the first time. Most of the 66 series represented in PRE were issued in Europe, but the USA is the country where the largest number of exsiccatae originated. The exsiccatae span three centuries, with the earliest specimens issued in 1845 and the latest in 2009. This indicates the long-standing exchange of material and transfer of knowledge between herbaria in South Africa and countries of the northern Hemisphere. Many of the exsiccatae in PRE are incomplete and specimens were received as duplicates in exchange sets rather than exsiccatae. PRE houses a number of important African and southern hemisphere exsiccatae including two different sets of A. Rehmann’s Musci Austro-Africani (1875–1877 and Musci Austro-Africani cont., and R. Ochyra’s Bryophyta Antarctica exsiccata.

  10. [Bryophytes, a potent source of drugs for tomorrow's medicine?].

    Science.gov (United States)

    Krzaczkowski, Lucie; Wright, Michel; Gairin, Jean Edouard

    2008-11-01

    Although secondary plant metabolites provided numerous leads for the development of a wide array of therapeutic drugs, the discovery of new drugs with novel structures has declined in the past few years. Indeed higher plants have a similar evolutionary history and so produce similar metabolites. Search for novel sources of new therapeutic compounds within unexplored parts of biodiversity is thus an attractive challenge. Bryophytes, a group of small terrestrial plants remain relatively untouched in the drug discovery process whereas some have been used as medicinal plants. Studies of their secondary metabolites are recent but reveal original compounds, some of which not synthesized by higher plants. However investigations often meet difficulties during harvest or isolation of active compounds. In consequence, small quantities of substances obtained may be the main reason for the lack of biological tests. Strategies to overcome those troubles may exist and then lead to innovative medicinal applications.

  11. BRYOPHYTES NEW RECORDS FOR MATO GROSSO STATE, BRAZIL

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    Nelson Antunes de Moura

    2016-03-01

    Full Text Available This study, a pioneer in the region, is part of the bryoflora survey municipalities of Baron Melgaço, Cuiabá and Chapada dos Guimarães, located in the southern region of Mato Grosso, Brazil. All materials were collected as viewed Yano (1984. In the herbarium of Federal University of Mato Grosso (UFMT, the materials were compared with the species already identified in its different taxa. In this article, nine species are cited are presented for the first time for the state of Mato Grosso: Calymperes platyloma, Campylopus savannarum, C. surinamensis, Fabronia macroblepharis, Hyophyla involuta, Sematophyllum adnatum, S. demissum, Racopilum tomentosum and Vesicularia vesicularis. The results showed the high occurrence of species collected as first quote for the state of Mato Grosso, whereas sparse samples were collected in three municipalities of the state, demonstrating the wealth of species in the region. Keywords: bryophytes; liver; new records.

  12. A Guide to Alaskan Black Spruce Wetland Bryophytes: Species Specific to Delineation for Interior and South Central Regions

    Science.gov (United States)

    2008-06-01

    many habitats . Often mixed with other bryophytes . Similar to both P. proligera and P. annotina, but differs in the leaf base that is not decurrent...E R D C / C R R E L T N - 0 8 - 2 A Guide to Alaskan Black Spruce Wetland Bryophytes Species Specific to...SUBTITLE A Guide to Alaskan Black Spruce Wetland Bryophytes 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d

  13. Bryophyte species richness on retention aspens recovers in time but community structure does not.

    Directory of Open Access Journals (Sweden)

    Anna Oldén

    Full Text Available Green-tree retention is a forest management method in which some living trees are left on a logged area. The aim is to offer 'lifeboats' to support species immediately after logging and to provide microhabitats during and after forest re-establishment. Several studies have shown immediate decline in bryophyte diversity after retention logging and thus questioned the effectiveness of this method, but longer term studies are lacking. Here we studied the epiphytic bryophytes on European aspen (Populus tremula L. retention trees along a 30-year chronosequence. We compared the bryophyte flora of 102 'retention aspens' on 14 differently aged retention sites with 102 'conservation aspens' on 14 differently aged conservation sites. We used a Bayesian community-level modelling approach to estimate the changes in bryophyte species richness, abundance (area covered and community structure during 30 years after logging. Using the fitted model, we estimated that two years after logging both species richness and abundance of bryophytes declined, but during the following 20-30 years both recovered to the level of conservation aspens. However, logging-induced changes in bryophyte community structure did not fully recover over the same time period. Liverwort species showed some or low potential to benefit from lifeboating and high potential to re-colonise as time since logging increases. Most moss species responded similarly, but two cushion-forming mosses benefited from the logging disturbance while several weft- or mat-forming mosses declined and did not re-colonise in 20-30 years. We conclude that retention trees do not function as equally effective lifeboats for all bryophyte species but are successful in providing suitable habitats for many species in the long-term. To be most effective, retention cuts should be located adjacent to conservation sites, which may function as sources of re-colonisation and support the populations of species that require old

  14. Differential proteomics of dehydration and rehydration in bryophytes: evidence towards a common desiccation tolerance mechanism.

    Science.gov (United States)

    Cruz DE Carvalho, Ricardo; Bernardes DA Silva, Anabela; Soares, Renata; Almeida, André M; Coelho, Ana Varela; Marques DA Silva, Jorge; Branquinho, Cristina

    2014-07-01

    All bryophytes evolved desiccation tolerance (DT) mechanisms during the invasion of terrestrial habitats by early land plants. Are these DT mechanisms still present in bryophytes that colonize aquatic habitats? The aquatic bryophyte Fontinalis antipyretica Hedw. was subjected to two drying regimes and alterations in protein profiles and sucrose accumulation during dehydration and rehydration were investigated. Results show that during fast dehydration, there is very little variation in protein profiles, and upon rehydration proteins are leaked. On the other hand, slow dehydration induces changes in both dehydration and rehydration protein profiles, being similar to the protein profiles displayed by the terrestrial bryophytes Physcomitrella patens (Hedw.) Bruch and Schimp. and, to what is comparable with Syntrichia ruralis (Hedw.) F. Weber and D. Mohr. During dehydration there was a reduction in proteins associated with photosynthesis and the cytoskeleton, and an associated accumulation of proteins involved in sugar metabolism and plant defence mechanisms. Upon rehydration, protein accumulation patterns return to control values for both photosynthesis and cytoskeleton whereas proteins associated with sugar metabolism and defence proteins remain high. The current results suggest that bryophytes from different ecological adaptations may share common DT mechanisms.

  15. Assessing airborne pollution effects on bryophytes: lessons learned through long-term integrated monitoring in Austria.

    Science.gov (United States)

    Zechmeister, H G; Dirnböck, T; Hülber, K; Mirtl, M

    2007-06-01

    The study uses measured and calculated data on airborne pollutants, particularly nitrogen (ranges between 28 to 43kgN*ha(-1)*yr(-1)) and sulphur (10 to 18kgSO(4)-S*ha(-1)*yr(-1)), in order to assess their long-term (1992 to 2005) effects on bryophytes at the UN-ECE Integrated Monitoring site 'Zöbelboden' in Austria. Bryophytes were used as reaction indicators on 20 epiphytic plots using the IM monitoring method and on 14 terrestrial plots using standardised photography. The plots were recorded in the years 1992, 1993, 1998, and 2004/2005. Most species remained stable in terms of their overall population size during the observed period, even though there were rapid turnover rates of a large percentage of species on all investigated plots. Only a few bryophytes (Hypnum cupressiforme, Leucodon sciuroides) responded unambiguously to N and S deposition. Nitrogen deposition had a weak but significant effect on the distribution of bryophyte communities. However, the time shifts in bryophyte communities did not depend on total deposition of N and S.

  16. Comparison of bryophyte diversity in West Tianmu Mountain from 1977 to 2011

    Directory of Open Access Journals (Sweden)

    Daihua Wang

    2013-03-01

    Full Text Available Bryophyte diversity plays an important role in forest ecosystems and is important in conservation. Based on two surveys of the bryophyte flora in West Tianmu Mountain, Zhejiang Province, China, conductedbetween 1977 and 1980, and 2010 and 2011, respectively, an analysis was made of changes in bryophte diversity from 1977 to 2011. We found that: (1 in the past three decades, the number of species, genera andfamilies of bryophytes, especially of liverworts, has tended to decline; (2 Brachytheciaceae, Dicranaceae, Hypanceae and Pottiaceae remain as the dominant families; (3 the stability of families is higher than that of genera and species; and (4 the greatest changes have occurred in the buffer zone, where the number of species new to the nature reserve is the highest. Most bryophytes are distributed in the area around the entrance to the Old Openning Temple in the core zone. This area shows the highest Sørensen similarity and proportionof new liverwort species. In contrast, from the Old Openning Temple to Xianren Peak in the core zone, only a few species occur and the community exhibits the lowest Sørensen similarity. We suggest that the core zone should be regarded as a key area for bryophyte protection in the region.

  17. Bryophyte-like Fossil (Parafunaria sinensis) from Early-Middle Cambrian Kaili Formation in Guizhou Province, China

    Institute of Scientific and Technical Information of China (English)

    YANGRui-Dong; MAOJia-Rer; ZHANGWei-Hua; JIANGLi-Jun; GAOHui

    2004-01-01

    Abundant well-preserved animal and macroalgal fossils were discovered in the Early-MiddleCambrian Kaili Formation of Taijiang County, Guizhou Province, China, which constitute the Kaili Biota,named as one of the three important Burgess Shale-type faunas. The bryophyte-like fossil (Parafunariasinensis Yang gen. et sp. nov) was discovered in the horizon of occurrence of Macroalgal fossils. The fossilof P. sinensis possesses typical characters of bryophyte, such as whorled leaves, capsule and seta, andcomplex rhizoid or foot. We infer that the bryophyte-like fossil could be the ancestor of bryophyte. Thediscovery provides a new lead for further study on the origin and evolution of bryophyte or land plant.

  18. Medium term ecohydrological response of peatland bryophytes to canopy disturbance

    Science.gov (United States)

    Leonard, Rhoswen; Kettridge, Nick; Krause, Stefan; Devito, Kevin; Granath, Gustaf; Petrone, Richard; Mandoza, Carl; Waddington, James Micheal

    2016-04-01

    Canopy disturbance in northern forested peatlands is widespread. Canopy changes impact the ecohydrological function of moss and peat, which provide the principal carbon store within these carbon rich ecosystems. Different mosses have contrasting contributions to carbon and water fluxes (e.g. Sphagnum fuscum and Pleurozium schreberi) and are strongly influenced by canopy cover. As a result, changes in canopy cover lead to long-term shifts in species composition and associated ecohydrological function. Despite this, the medium-term response to such disturbance, the associated lag in this transition to a new ecohydrological and biogeochemical regime, is not understood. Here we investigate this medium term ecohydrological response to canopy removal using a randomised plot design within a north Albertan peatland. We show no significant ecohydrological change in treatment plots four years after canopy removal. Notably, Pleurozium schreberi and Sphagnum fuscum remained within respective plots post treatment and there was no significant difference in plot resistance to evapotranspiration or carbon exchange. Our results show that canopy removal alone has little impact on bryophyte ecohydrology in the short/medium term. This resistance to disturbance contrasts strongly with dramatic short-term changes observed within mineral soils suggesting that concurrent shifts in the large scale hydrology induced within such disturbances are necessary to cause rapid ecohydrological transitions. Understanding this lagged response is critical to determine the decadal response of carbon and water fluxes in response to disturbance and the rate at which important medium term ecohydrological feedbacks are invoked.

  19. Quantifying the effect of lichen and bryophyte cover on permafrost soil within a global land surface model

    Science.gov (United States)

    Porada, Philipp; Ekici, Altug; Beer, Christian

    2016-04-01

    Vegetation near the surface, such as bryophytes and lichens, has an insulating effect on the soil at high latitudes and it can therefore protect permafrost conditions. Warming due to climate change, however, may change the average surface coverage of bryophytes and lichens. This can result in permafrost thawing associated with a release of soil carbon to the atmosphere, which may lead to a positive feedback on atmospheric CO2. Thus, it is important to predict how the bryophyte and lichen cover at high latitudes will react to environmental change. However, current global land surface models so far contain mostly empirical approaches to represent bryophytes and lichens, which makes it impractical to predict their future state and function. For this reason, we integrate a process-based model of bryophyte and lichen growth into the global land surface model JSBACH. We explicitly represent dynamic thermal properties of the bryophyte and lichen cover and their relation to climate. Subsequently, we compare simulations with and without bryophyte and lichen cover to quantify the insulating effect. We estimate an annual average cooling effect of the bryophyte and lichen cover of 2.7 K on topsoil temperature for the northern high latitudes under current climate. Locally, the cooling may reach up to 5.7 K. Moreover, we show that neglecting dynamic properties of the bryophyte and lichen cover by using a simple, empirical scheme only results in an average cooling of around 0.5 K. This suggests that bryophytes and lichens have a significant impact on soil temperature in high-latitude ecosystems and also that a process-based description of their thermal properties is necessary for a realistic representation of the cooling effect.

  20. The Unexpected Re-Growth of Ice-Entombed Bryophytes in the Canadian High Arctic

    Science.gov (United States)

    La Farge, C.

    2014-12-01

    The rapid retreat of glaciers and ice caps throughout the Canadian Arctic is exposing pristine vegetation preserved beneath cold-based ice. For the past half century this vegetation has been consistently reported as dead. This interpretation has been overturned by the successful re-growth of Little Ice Age (1550-1850 AD) bryophytes emerging from the Teardrop Glacier, Sverdrup Pass, Ellesmere Island (79° N) collected in 2009. Some populations showed regeneration in the field and lab experiments confirmed their capacity to regrow. The species richness of these subglacial populations is exceptional, comprising >62 species that represent 44% of the extant bryophyte flora of Sverdrup Pass. Cold-based glaciers are known to provide critical habitats for a variety of microbiota (i.e., fungi, algae, cyanobacteria, bacteria and viruses) in high latitude ecosystems. The regeneration of Little Ice Age bryophytes fundamentally expands the concept of biological refugia to land plants that was previously restricted to survival above and beyond glacial margins. Given this novel understanding of subglacial ecosystems, fieldwork is now being extended southward to plateau ice caps on Baffin Island, Nunavut, where ice retreat is exposing subglacial populations of greater antiquity (thousands to tens of thousands of radiocarbon years before present). Bryophytes by nature are totipotent (stem cell equivalency) and poikilohydric (desiccation tolerance), which facilitate their unique adaptation to extreme environments. Continuity of the Arctic bryophyte flora extends back through the Holocene to the late Tertiary [Beaufort Fm, 2-5 Ma], when the majority of taxa were the same, based on records spanning the archipelago from Ellesmere to Banks Island. This record contrasts with that of vascular plants, which have had a number of extinctions, necessitating recolonization of arctic populations from outside the region. The biological significance of a stable bryophyte element highlights their

  1. Using Bryophytes and Stable isotopes to Assess Paleohydrological Changes in a Subarctic Alaskan Peatland

    Science.gov (United States)

    Jones, M.; Peteet, D.; Sambrotto, R.

    2007-12-01

    Hydrologic changes resulting from climate change have important effects on vegetation change and global feedback cycles in the high latitudes. In an attempt to move beyond pollen analysis to interpret past climate, a number of geochemical and biological proxies were used, including bulk peat δ 13C, δ15N, and bryophytes, to make paleohydrological inferences from peat cores in south central Alaska. Bryophyte species distribution and composition are sensitive to water table position and pH, making them good candidates for paleohydrologic analyses. Bryophyte species were identified in \\1-m2 plots from the forest edge to the wettest swale across numerous peatland sites on the Kenai Peninsula, taking pH, conductivity, and temperature measurements for each plot. This modern calibration was used to conduct bryophyte analysis from two peatland cores from the Kenai Peninsula lowlands dated to 14.2 ka and 18.8 ka. Both records exhibit good preservation of both leaves and stems, allowing for analysis and identification. Late-glacial domination of brown moss species denotes rich fen conditions, and high moisture availability, as is indicated in the δ13C record. Increased δ13C values ca. 10 ka indicate a shift from moister to drier conditions, and the bryophyte species switch to higher hummock brown moss species and Sphagnum spp. Similar shifts in δ15N from negative values to near 0‰ suggest a switch of nutrient input to the fen from combined nitrogen pools to atmospheric nitrogen sources. The bryophyte species composition shows a dominance of acidic poor fen conditions in the mid- to late- Holocene. These shifts corroborate what was previously interpreted in the pollen and macrofossil record from these peatland sites.

  2. Measurement and modeling of bryophyte evaporation in a boreal forest chronosequence

    Energy Technology Data Exchange (ETDEWEB)

    Bond-Lamberty, Benjamin; Gower, Stith T.; Amiro, Brian; Ewers, Brent

    2011-01-19

    The effects of changing climate and disturbance on forest water cycling are not well understood. In particular bryophytes contribute significantly to forest evapotranspiration (ET) in poorly-drained boreal forests, but few studies have directly measured this flux and how it changes with stand age and soil drainage. We used large chambers to measure bryophyte evaporation (E) in Canadian Picea mariana forests of varying ages and soil drainages, as well under controlled laboratory conditions, and modeled daily E using site-specific meteorological data to drive a Penman-Monteith-based model. Field measurements of E averaged 0.37 mm day-1, and ranged from 0.03 (Pleurozium schreberii in a 77-year-old dry stand) to 1.43 mm day-1 (Sphagnum riparium in a 43-year-old bog). canopy resistance ranged from ~0 (at 25 °C, some values were <0) to ~1500 s m-1 for dry, cold (5 °C) mosses. In the laboratory, moss canopy resistance was constant until a moss water content of ~6 g g-1 and then climbed sharply with further drying; no difference was observed between the three moss groups (feather mosses, hollow mosses, and hummock mosses) tested. Modeled annual E fluxes from bryophytes ranged from 0.4 mm day-1, in the well-drained stands, to ~1 mm day-1 in the 43-year-old bog, during the growing season. Eddy covariance data imply that bryophytes contributed 18-31% and 49-69% to the total ET flux, at the well- and poorly-drained stands respectively. Bryophyte E was greater in bogs than in upland stands, was driven by low-lying mosses, and did not vary with stand age; this suggests that shifts in forest age due to increasing fire will have little effect on the bryophyte contribution to ET.

  3. Methodology significantly affects genome size estimates: quantitative evidence using bryophytes.

    Science.gov (United States)

    Bainard, Jillian D; Fazekas, Aron J; Newmaster, Steven G

    2010-08-01

    Flow cytometry (FCM) is commonly used to determine plant genome size estimates. Methodology has improved and changed during the past three decades, and researchers are encouraged to optimize protocols for their specific application. However, this step is typically omitted or undescribed in the current plant genome size literature, and this omission could have serious consequences for the genome size estimates obtained. Using four bryophyte species (Brachythecium velutinum, Fissidens taxifolius, Hedwigia ciliata, and Thuidium minutulum), three methodological approaches to the use of FCM in plant genome size estimation were tested. These included nine different buffers (Baranyi's, de Laat's, Galbraith's, General Purpose, LB01, MgSO(4), Otto's, Tris.MgCl(2), and Woody Plant), seven propidium iodide (PI) staining periods (5, 10, 15, 20, 45, 60, and 120 min), and six PI concentrations (10, 25, 50, 100, 150, and 200 microg ml(-1)). Buffer, staining period and staining concentration all had a statistically significant effect (P = 0.05) on the genome size estimates obtained for all four species. Buffer choice and PI concentration had the greatest effect, altering the 1C-values by as much as 8% and 14%, respectively. As well, the quality of the data varied with the different methodology used. Using the methodology determined to be the most accurate in this study (LB01 buffer and PI staining for 20 min at 150 microg ml(-1)), three new genome size estimates were obtained: B. velutinum: 0.46 pg, H. ciliata: 0.30 pg, and T. minutulum: 0.46 pg. While the peak quality of flow cytometry histograms is important, researchers must consider that changes in methodology can also affect the relative peak positions and therefore the genome size estimates obtained for plants using FCM.

  4. 苔藓植物组织培养研究进展%Research progress on the bryophytes tissue culture

    Institute of Scientific and Technical Information of China (English)

    张楠; 杜宝明; 季梦成

    2011-01-01

    苔藓植物种类繁多,分布广泛,资源丰富,但目前对苔藓的研究才刚刚起步,苔藓的许多应用价值尚未得到开发.根据国内外相关研究,综述了苔藓植物的应用价值,并就苔藓植物在组织培养方面的研究进展进行概述,介绍了苔藓植物组织培养的研究简史.同时,对苔藓植物培养材料、消毒方法、基本培养基和培养条件的研究进行了总结分析.建议加强苔藓植物生理、生化方面的研究,发掘苔藓的应用价值,并加强时苔藓快繁体系的研究,建立苔藓植物组织培养的快繁体系.对苔藓组织培养的应用前景进行了展望.%Bryophytes are widely spread plants with abundant resources and various species. However, the study on bryophytes has just started and many of its applications have not yet been developed. This paper reviewed the application values of bryophytes according to related researches at home and abroad. The research progress and history on tissue culture of bryophytes were introduced. Meanwhile, the studies of culture materials of bryophytes, disinfection methods, basic media and culture conditions were analyzed and summarized. It was suggested strengthening physiology research and biochemistry research of bryophytes, exploring the application value of bryophytes, establishing tissue culture and rapid propagation system of bryophytes. The application prospects of bryophytes were put forward.

  5. Water relations and gas exchange of fan bryophytes and their adaptations to microhabitats in an Asian subtropical montane cloud forest.

    Science.gov (United States)

    Song, Liang; Zhang, Yong-Jiang; Chen, Xi; Li, Su; Lu, Hua-Zheng; Wu, Chuan-Sheng; Tan, Zheng-Hong; Liu, Wen-Yao; Shi, Xian-Meng

    2015-07-01

    Fan life forms are bryophytes with shoots rising from vertical substratum that branch repeatedly in the horizontal plane to form flattened photosynthetic surfaces, which are well suited for intercepting water from moving air. However, detailed water relations, gas exchange characteristics of fan bryophytes and their adaptations to particular microhabitats remain poorly understood. In this study, we measured and analyzed microclimatic data, as well as water release curves, pressure-volume relationships and photosynthetic water and light response curves for three common fan bryophytes in an Asian subtropical montane cloud forest (SMCF). Results demonstrate high relative humidity but low light levels and temperatures in the understory, and a strong effect of fog on water availability for bryophytes in the SMCF. The facts that fan bryophytes in dry air lose most of their free water within 1 h, and a strong dependence of net photosynthesis rates on water content, imply that the transition from a hydrated, photosynthetically active state to a dry, inactive state is rapid. In addition, fan bryophytes developed relatively high cell wall elasticity and the osmoregulatory capacity to tolerate desiccation. These fan bryophytes had low light saturation and compensation point of photosynthesis, indicating shade tolerance. It is likely that fan bryophytes can flourish on tree trunks in the SMCF because of substantial annual precipitation, average relative humidity, and frequent and persistent fog, which can provide continual water sources for them to intercept. Nevertheless, the low water retention capacity and strong dependence of net photosynthesis on water content of fan bryophytes indicate a high risk of unbalanced carbon budget if the frequency and severity of drought increase in the future as predicted.

  6. Outdoor studies on the effects of solar UV-B on bryophytes : Overview and methodology

    NARCIS (Netherlands)

    Boelen, P.; de Boer, M.K.; de Bakker, N.; Rozema, Jelte

    2006-01-01

    In this review all recent field studies on the effects of UV-B radiation on bryophytes are discussed. In most of the studies fluorescent UV-B tubes are used to expose the vegetation to enhanced levels of UV-B radiation to simulate stratospheric ozone depletion. Other studies use screens to filter th

  7. Estimating global carbon uptake by lichens and bryophytes with a process-based model

    Science.gov (United States)

    Porada, P.; Weber, B.; Elbert, W.; Pöschl, U.; Kleidon, A.

    2013-11-01

    Lichens and bryophytes are abundant globally and they may even form the dominant autotrophs in (sub)polar ecosystems, in deserts and at high altitudes. Moreover, they can be found in large amounts as epiphytes in old-growth forests. Here, we present the first process-based model which estimates the net carbon uptake by these organisms at the global scale, thus assessing their significance for biogeochemical cycles. The model uses gridded climate data and key properties of the habitat (e.g. disturbance intervals) to predict processes which control net carbon uptake, namely photosynthesis, respiration, water uptake and evaporation. It relies on equations used in many dynamical vegetation models, which are combined with concepts specific to lichens and bryophytes, such as poikilohydry or the effect of water content on CO2 diffusivity. To incorporate the great functional variation of lichens and bryophytes at the global scale, the model parameters are characterised by broad ranges of possible values instead of a single, globally uniform value. The predicted terrestrial net uptake of 0.34 to 3.3 Gt yr-1 of carbon and global patterns of productivity are in accordance with empirically-derived estimates. Considering that the assimilated carbon can be invested in processes such as weathering or nitrogen fixation, lichens and bryophytes may play a significant role in biogeochemical cycles.

  8. Bryophyte species associations with coarse woody debris and stand ages in Oregon

    Science.gov (United States)

    Rambo, T.; Muir, Patricia S.

    1998-01-01

    We quantified the relationships of 93 forest floor bryophyte species, including epiphytes from incorporated litterfall, to substrate and stand age in Pseudotsuga menziesii-Tsuga heterophylla stands at two sites in western Oregon. We used the method of Dufr??ne and Legendre that combines a species' relative abundance and relative frequency, to calculate that species' importance in relation to environmental variables. The resulting 'indicator value' describes a species' reliability for indicating the given environmental parameter. Thirty-nine species were indicative of either humus, a decay class of coarse woody debris, or stand age. Bryophyte community composition changed along the continuum of coarse woody debris decomposition from recently fallen trees with intact bark to forest floor humus. Richness of forest floor bryophytes will be enhanced when a full range of coarse woody debris decay classes is present. A suite of bryophytes indicated old-growth forest. These were mainly either epiphytes associated with older conifers or liverworts associated with coarse woody debris. Hardwood-associated epiphytes mainly indicated young stands. Mature conifers, hardwoods, and coarse woody debris are biological legacies that can be protected when thinning managed stands to foster habitat complexity and biodiversity, consistent with an ecosystem approach to forest management.

  9. Diversity of dead wood inhabiting fungal and bryophytes in semi-natural beech forests in Europe

    NARCIS (Netherlands)

    Ódor, P.; Heilmann-Clausen, J.; Christensen, M.; Aude, E.; Dort, van K.W.; Piltaver, A.; Siller, I.; Veerkamp, M.T.; Walleyn, R.; Standovár, T.; Hees, van A.F.M.; Kosec, J.; Matocec, N.; Kraigher, H.; Grebenc, T.

    2006-01-01

    Saproxylic organisms are among the most threatened species in Europe and constitute a major conservation problem because they depend on the most important forestry product - dead wood. Diversity of fungal and bryophyte communities occurring on dead beech trees was analyzed in five European countries

  10. Estimating global carbon uptake by lichens and bryophytes with a process-based model

    Directory of Open Access Journals (Sweden)

    P. Porada

    2013-02-01

    Full Text Available Lichens and bryophytes are abundant globally and they may even form the dominant autotrophs in (subpolar ecosystems, in deserts and at high altitudes. Moreover, they can be found in large amounts as epiphytes in old-growth forests. Here, we present the first process-based model which estimates the net carbon uptake by these organisms at the global scale, thus assessing their significance for biogeochemical cycles. The model uses gridded climate data and key properties of the habitat (e.g. disturbance intervals to predict processes which control net carbon uptake, namely photosynthesis, respiration, water uptake and evaporation. It relies on equations used in many dynamical vegetation models, which are combined with concepts specific to lichens and bryophytes, such as poikilohydry or the effect of water content on CO2 diffusivity. To incorporate the great functional variation of lichens and bryophytes at the global scale, the model parameters are characterised by broad ranges of possible values instead of a single, globally uniform value. The predicted terrestrial net carbon uptake of 0.34 to 3.3 (Gt C yr−1 and global patterns of productivity are in accordance with empirically-derived estimates. Considering that the assimilated carbon can be invested in processes such as weathering or nitrogen fixation, lichens and bryophytes may play a significant role in biogeochemical cycles.

  11. Multibeam Sonar Mapping and Modeling of a Submerged Bryophyte Mat in Crater Lake, Oregon

    Science.gov (United States)

    Dartnell, Peter; Collier, Robert; Buktenica, Mark; Jessup, Steven; Girdner, Scott; Triezenberg, Peter

    2008-01-01

    Traditionally, multibeam data have been used to map sea floor or lake floor morphology as well as the distribution of surficial facies in order to characterize the geologic component of benthic habitats. In addition to using multibeam data for geologic studies, we want to determine if these data can also be used directly to map the distribution of biota. Multibeam bathymetry and acoustic backscatter data collected in Crater Lake, Oregon, in 2000 are used to map the distribution of a deep-water bryophyte mat, which will be extremely useful for understanding the overall ecology of the lake. To map the bryophyte's distribution, depth range, acoustic backscatter intensity, and derived bathymetric index grids are used as inputs into a hierarchical decision-tree classification model. Observations of the bryophyte mat from over 23 line kilometers of lake-floor video collected in the summer of 2006 are used as controls for the model. The resulting map matches well with ground-truth information and shows that the bryophyte mat covers most of the platform surrounding Wizard Island as well as on outcrops around the caldera wall.

  12. Up in the tree--the overlooked richness of bryophytes and lichens in tree crowns.

    Directory of Open Access Journals (Sweden)

    Steffen Boch

    Full Text Available Assessing diversity is among the major tasks in ecology and conservation science. In ecological and conservation studies, epiphytic cryptogams are usually sampled up to accessible heights in forests. Thus, their diversity, especially of canopy specialists, likely is underestimated. If the proportion of those species differs among forest types, plot-based diversity assessments are biased and may result in misleading conservation recommendations. We sampled bryophytes and lichens in 30 forest plots of 20 m × 20 m in three German regions, considering all substrates, and including epiphytic litter fall. First, the sampling of epiphytic species was restricted to the lower 2 m of trees and shrubs. Then, on one representative tree per plot, we additionally recorded epiphytic species in the crown, using tree climbing techniques. Per tree, on average 54% of lichen and 20% of bryophyte species were overlooked if the crown was not been included. After sampling all substrates per plot, including the bark of all shrubs and trees, still 38% of the lichen and 4% of the bryophyte species were overlooked if the tree crown of the sampled tree was not included. The number of overlooked lichen species varied strongly among regions. Furthermore, the number of overlooked bryophyte and lichen species per plot was higher in European beech than in coniferous stands and increased with increasing diameter at breast height of the sampled tree. Thus, our results indicate a bias of comparative studies which might have led to misleading conservation recommendations of plot-based diversity assessments.

  13. Species richness and origin of the bryophyte flora of the Colombian Andes

    NARCIS (Netherlands)

    Gradstein, S.R.; Reenen, van G.B.A.; Griffin, D.

    1988-01-01

    Based on data from the ECOANDES project, a phytogeographical analysis has been made of the bryophyte flora along the wet, foggy western slope (1000-4500 m) and the drier eastern slope (500-4500 m) of the Colombian Central Cordillera at the ‘Parque de los Nevados’. Species richness increases with alt

  14. Physcomitrium eurystomum and Pohlia proligera, new mosses in the bryophyte flora of Serbia

    Directory of Open Access Journals (Sweden)

    Papp Beáta

    2013-01-01

    Full Text Available Physcomitrium eurystomum Sendtn. and Pohlia proligera (Kindb. Lindb. ex Broth. were recently discovered as new moss species for the bryophyte flora of Serbia. Both species were recorded in the Vlasina Lake area, a large highland wetland plateau in southeastern Serbia.

  15. Diversity and composition of dead wood inhabiting fungal and bryophyte communities

    NARCIS (Netherlands)

    Ódor, P.; Heilmann-Clausen, J.; Christensen, M.; Aude, E.; Dort, van K.W.; Piltaver, A.; Veerkamp, M.T.; Walleyn, R.; Standovár, T.; Hees, van A.F.M.; Kosec, J.; Matocec, N.; Kraigher, H.; Grebenc, T.

    2004-01-01

    Species composition and diversity of fungi and bryophyte communities occurring on dead beech trees were analysed in five European countries (Slovenia, Hungary, The Netherlands, Belgium and Denmark). Altogether 1009 trees were inventoried in 19 beech dominated forest reserves. The realized species po

  16. Bryophyte DNA sequences from faeces of an arctic herbivore, barnacle goose (Branta leucopsis)

    NARCIS (Netherlands)

    Stech, M.; Kolvoort, E.; Loonen, M. J. J. E.; Vrieling, K.; Kruijer, J. D.

    2011-01-01

    We tested DNA extraction methods and PCR conditions for the amplification of bryophyte DNA from barnacle goose (Branta leucopsis) faeces collected from Spitsbergen (Svalbard). Both the Qiagen stool kit and a silica-based extraction method received sufficient DNA from fresh and older droppings, as in

  17. Spruce forest bryophytes in central Norway and their relationship to environmental factors including modern forestry

    Energy Technology Data Exchange (ETDEWEB)

    Frisvoll, A.A. [Norwegian Inst. for Nature Research, Trondheim (Norway); Prestoe, T. [Norwegian Univ. of Science and Technology, Museum of Natural History and Archaeology, Dept. of Botany, Trondheim (Norway)

    1997-02-01

    In this study of bryophyte diversity in 110 patches of spruce forests of bilberry, small fern, low herb, tall fern and tall herb type in Soer-Troendelag, central Norway, each patch (from 0.24 to 9.33 ha) was classified as one main vegetation type and one successional stage or cutting class. The bryophytes in each patch were censured in randomly established squares of 10 x 10 m, supplemented by complete sampling in the rest of the patch. A number of environmental variables was sampled, and the data sets treated with DCA and CCA. Altogether 210 bryophytes (71 liverworts and 139 mosses) were found in the squares, and 285 (96 liverworts and 189 mosses) in the forest patches. The average number of liverworts, mosses and bryophytes in forest patches increased gradually from the dry and poor to the moist and rich forest types. Several red listed and other interesting spruce forest species had their only or main occurrence in the rich and humid forest, and in old cutting classes. (au) 45 refs.

  18. Selenium in soils, spermatophytes and bryophytes around a Zn-Pb smelter, New South Wales, Australia.

    Science.gov (United States)

    Huang, Yi Jian; Gulson, Brian L

    2002-07-01

    Selenium concentrations and its spatial distribution in soils, spermatophytes and bryophytes (mosses) around the Cockle Creek Zn-Pb smelter, New South Wales were studied from May to November 2000. Selenium was determined by ICP-MS on soils digested in nitric and hydrochloric acid (HNO3:HCl = 3:1), and plant samples digested in distilled concentrated nitric acid. At distances greater than 3 km, selenium in soils, spermatophytes and bryophytes converge to uniform values, which are considered to represent the background value. Mean selenium in soils around the smelter is two times higher than the background value. Mean concentration of selenium in plants around the smelter is three times greater than that for background plants. Selenium from 'in site' bryophyte is twice that found in the background bryophyte. The transfer coefficients of selenium between plants and soils are low, especially at a distance less than 1 km from the smelter. However, mosses show the reverse trend. This study indicates that the Zn-Pb smelter is one of the anthropogenic point sources of selenium pollution in the Lake Macquarie district.

  19. Fungal biomass associated with the phyllosphere of bryophytes and vascular plants.

    Science.gov (United States)

    Davey, M L; Nybakken, L; Kauserud, H; Ohlson, M

    2009-11-01

    Little is known about the amount of fungal biomass in the phyllosphere of bryophytes compared to higher plants. In this study, fungal biomass associated with the phyllosphere of three bryophytes (Hylocomium splendens, Pleurozium schreberi, Polytrichum commune) and three vascular plants (Avenella flexuosa, Gymnocarpium dryopteris, Vaccinium myrtillus) was investigated using ergosterol content as a proxy for fungal biomass. Phyllosphere fungi accounted for 0.2-4.0 % of the dry mass of moss gametophytes, representing the first estimation of fungal biomass associated with bryophytes. Significantly more fungal biomass was associated with the phyllosphere of bryophytes than co-occurring vascular plants. The ergosterol present in moss gametophytic tissues differed significantly between species, while the ergosterol present in vascular plant leaf tissues did not. The photosynthetic tissues of mosses had less associated fungal biomass than their senescent tissues, and the magnitude of this difference varied in a species-specific manner. The fungal biomass associated with the vascular plants studied varied significantly between localities, while that of mosses did not. The observed differences in phyllosphere community biomass suggest their size could be affected by host anatomical and physiological attributes, including micro-niche availability and chemical host defenses, in addition to abiotic factors like moisture and nutrient availability.

  20. The bryophytes of the Departments of Narino and Putumayo, Columbia: II. Hepatics and hornworts

    Science.gov (United States)

    This contribution is part of an inventory of the basic biodiversity of part of the Andes of southern Colombia. It deals with two bryophyte groups, the liverworts and hornworts, which are two groups of plants that are poorly known in this area, although they are very diverse in the region and are us...

  1. Up in the tree--the overlooked richness of bryophytes and lichens in tree crowns.

    Science.gov (United States)

    Boch, Steffen; Müller, Jörg; Prati, Daniel; Blaser, Stefan; Fischer, Markus

    2013-01-01

    Assessing diversity is among the major tasks in ecology and conservation science. In ecological and conservation studies, epiphytic cryptogams are usually sampled up to accessible heights in forests. Thus, their diversity, especially of canopy specialists, likely is underestimated. If the proportion of those species differs among forest types, plot-based diversity assessments are biased and may result in misleading conservation recommendations. We sampled bryophytes and lichens in 30 forest plots of 20 m × 20 m in three German regions, considering all substrates, and including epiphytic litter fall. First, the sampling of epiphytic species was restricted to the lower 2 m of trees and shrubs. Then, on one representative tree per plot, we additionally recorded epiphytic species in the crown, using tree climbing techniques. Per tree, on average 54% of lichen and 20% of bryophyte species were overlooked if the crown was not been included. After sampling all substrates per plot, including the bark of all shrubs and trees, still 38% of the lichen and 4% of the bryophyte species were overlooked if the tree crown of the sampled tree was not included. The number of overlooked lichen species varied strongly among regions. Furthermore, the number of overlooked bryophyte and lichen species per plot was higher in European beech than in coniferous stands and increased with increasing diameter at breast height of the sampled tree. Thus, our results indicate a bias of comparative studies which might have led to misleading conservation recommendations of plot-based diversity assessments.

  2. A Novel Experimental Design for Examining Bryophyte Response to Increased Ultraviolet Radiation

    Science.gov (United States)

    Fuselier, Linda; True, Nicole

    2009-01-01

    Bryophytes were among the earliest colonizers of terrestrial environs, and despite their interesting life histories and population dynamics, they are rarely used in undergraduate introductory biology labs. In an inquiry-based laboratory exercise for introductory biology, students implement a controlled experiment to investigate effects of…

  3. Desiccation tolerance in Bryophytes: relevance to the evolution of desiccation tolerance in Land Plants

    Science.gov (United States)

    The majority of desiccation-tolerant plants are found in the less complex clades that constitute the algae, lichens and bryophytes. However, within the larger and more complex groups of vascular land plants there are some 120-130 species that exhibit some degree of vegetative desiccation tolerance. ...

  4. ABA in bryophytes: how a universal growth regulator in life became a plant hormone?

    Science.gov (United States)

    Takezawa, Daisuke; Komatsu, Kenji; Sakata, Yoichi

    2011-07-01

    Abscisic acid (ABA) is not a plant-specific compound but one found in organisms across kingdoms from bacteria to animals, suggesting that it is a ubiquitous and versatile substance that can modulate physiological functions of various organisms. Recent studies have shown that plants developed an elegant system for ABA sensing and early signal transduction mechanisms to modulate responses to environmental stresses for survival in terrestrial conditions. ABA-induced increase in stress tolerance has been reported not only in vascular plants but also in non-vascular bryophytes. Since bryophytes are the key group of organisms in the context of plant evolution, clarification of their ABA-dependent processes is important for understanding evolutionary adaptation of land plants. Molecular approaches using Physcomitrella patens have revealed that ABA plays a role in dehydration stress tolerance in mosses, which comprise a major group of bryophytes. Furthermore, we recently reported that signaling machinery for ABA responses is also conserved in liverworts, representing the most basal members of extant land plant lineage. Conservation of the mechanism for ABA sensing and responses in angiosperms and basal land plants suggests that acquisition of this mechanism for stress tolerance in vegetative tissues was one of the critical evolutionary events for adaptation to the land. This review describes the role of ABA in basal land plants as well as non-land plant organisms and further elaborates on recent progress in molecular studies of model bryophytes by comparative and functional genomic approaches.

  5. Bryophyte flora on the northern slopes of Zlatar Mountain (Southwest Serbia

    Directory of Open Access Journals (Sweden)

    Veljić M.

    2008-01-01

    Full Text Available This work presents a contribution to knowledge of the bryophyte flora of Zlatar Mountain. A total of 127 taxa from 35 families were identified. The hepatics are represented by 18 and mosses by 109 taxa. Representatives of the Holarctic distribution type and the temperate floristic category are highly present the investigated area.

  6. HPLC–DAD of phenolics in bryophytes Lunularia cruciata, Brachytheciastrum velutinum and Kindbergia praelonga

    Directory of Open Access Journals (Sweden)

    NEBOJSA JOCKOVIC

    2008-12-01

    Full Text Available The chemistry of bryophytes is not well known. The available data indicate interesting chemical constitutions of some bryophyte species, i.e., active and new compounds are to be found within bryophytes, especially liverworts. In this study, one liverwort and two moss species were studied: Lunularia cruciata (L. Dumort, Brachytheciastrum velutinum (Hedw Ignatov & Huttunen and Kindbergia praelonga (Hedw Ochyra. The phenolic compositions of these bryophyte species have not hitherto been reported. Their methanolic extracts were analyzed by reversed-phase HPLC, coupled to a diode-array detector (DAD. Luteolin-7-O-glucoside and quercetin were found in the L. cruciata extract. The extract obtained from B. velutinum contained four phenolic acids (4-O-caffeoylquinic, 5-O-caffeoylquinic, caffeic and ellagic acids and three flavonoids (apigenin-7-O-glucoside, luteolin and apigenin. The K. praelonga extract was characterized by the presence of several phenolic acids and their derivatives (4-O-caffeoylquinic, 5-O-caffeoylquinic, caffeic, p-coumaric, ferulic and ellagic acids, and caffeic and p-coumaric acid derivatives and three flavonoids (apigenin-7-O-glucoside, luteolin, apigenin and an un-identified flavanone.

  7. Estimation of fog deposition on epiphytic bryophytes in a subtropical montane forest ecosystem in northeastern Taiwan

    Science.gov (United States)

    Chang, Shih-Chieh; Lai, I.-Ling; Wu, Jiunn-Tzong

    The fog meteorology, fog chemistry and fog deposition on epiphytic bryophytes were investigated from July 2000 to June 2001 in the Yuanyang Lake forest ecosystem. The elevation of the site ranges from 1650 to 2420 m, at which the high frequency of fog occurrence throughout the year has been thought to be of benefit to the establishment of the primary Taiwan yellow cypress forest [ Chamaecyparis obtusa var. formosana (Hayata) Rehder] and to the extensive growth of the epiphytic bryophytes. A weather station including a visibility sensor and an active fog collector was installed for fog meteorological and chemical study. The fog deposition rate on epiphytic bryophytes was estimated by measuring the increase rate in plant weight when exposed to fog. Average fog duration of 4.7 and 11.0 h per day was measured in summer months (June to August) and the rest of the year, respectively. November 2000 was the foggiest month in which the average fog duration reached 14.9 h per day. The ionic composition of fog water revealed that the area was less polluted than expected from literature data. The in situ exposure experiments done with the dominant epiphytic bryophytes showed an average fog deposition rate of 0.63 g H 2O g -1 d. w. h -1, which approximated 0.17 mm h -1 at the stand scale. The nutrient fluxes estimated for February 2001 showed that for all ions, more than 50% of the ecosystem input was through fog deposition. These results demonstrate the importance of epiphytic bryophytes and fog deposition in nutrient cycling of this subtropical montane forest ecosystem. The incorporation of fog study in the long-term ecosystem research projects is necessary in this area.

  8. Number of genera as a potential screening tool for assessing quality of bryophyte communities in Ohio wetlands

    Science.gov (United States)

    Schumacher, William; Stapanian, Martin A.; Andreas, Barbara; Gara, Brian

    2016-01-01

    Bryophytes (mosses, liverworts, and hornworts) have numerous advantages as indicators of environmental quality. A quality assessment index for bryophyte species assemblages (BQAI) was developed for the State of Ohio, USA. Reliable identification of bryophytes to species often requires considerable training, practice, and time. In contrast, reliable identification to genera for most bryophytes in Ohio requires much less training. We identified 110 bryophyte species (14 liverworts and 96 mosses) belonging to 69 genera (13 liverwort and 56 moss) in 45 wetlands (27 emergent, 13 forested, and 5 shrub) in Ohio. As expected, there were more genera and higher BQAI scores in forested than in emergent wetlands. Number of genera was highly correlated (r ≥ 0.9) with BQAI in emergent and forested wetlands and for the combined set of wetlands. Number of genera and BQAI responded almost identically to an index of wetland disturbance. The results suggest that number of genera has potential as a screening tool for assessing bryophyte community quality in wetlands in some regions.

  9. Regeneration of Little Ice Age bryophytes emerging from a polar glacier with implications of totipotency in extreme environments.

    Science.gov (United States)

    La Farge, Catherine; Williams, Krista H; England, John H

    2013-06-11

    Across the Canadian Arctic Archipelago, widespread ice retreat during the 20th century has sharply accelerated since 2004. In Sverdrup Pass, central Ellesmere Island, rapid glacier retreat is exposing intact plant communities whose radiocarbon dates demonstrate entombment during the Little Ice Age (1550-1850 AD). The exhumed bryophyte assemblages have exceptional structural integrity (i.e., setae, stem structures, leaf hair points) and have remarkable species richness (60 of 144 extant taxa in Sverdrup Pass). Although the populations are often discolored (blackened), some have developed green stem apices or lateral branches suggesting in vivo regrowth. To test their biological viability, Little Ice Age populations emerging from the ice margin were collected for in vitro growth experiments. Our results include a unique successful regeneration of subglacial bryophytes following 400 y of ice entombment. This finding demonstrates the totipotent capacity of bryophytes, the ability of a cell to dedifferentiate into a meristematic state (analogous to stem cells) and develop a new plant. In polar ecosystems, regrowth of bryophyte tissue buried by ice for 400 y significantly expands our understanding of their role in recolonization of polar landscapes (past or present). Regeneration of subglacial bryophytes broadens the concept of Ice Age refugia, traditionally confined to survival of land plants to sites above and beyond glacier margins. Our results emphasize the unrecognized resilience of bryophytes, which are commonly overlooked vis-a-vis their contribution to the establishment, colonization, and maintenance of polar terrestrial ecosystems.

  10. Bryophytes from the Republic of Equatorial Guinea (West-Central Africa) : 2., bryophytes collected by Emilio Guinea (1907-1985) in the Island of Bioco in 1947

    OpenAIRE

    Infante, Marta; Heras, Patxi; Buck, William R.

    1997-01-01

    Some unidentified samples of bryophytes collected by Emilio Guinea in Bioco (Equatorial Guinea) in 1947 have been studied. Twenty-seven taxa are the result of this study, nine of them being new for Equatorial Guinea and two new for the island of Bioco. Se han estudiado varias muestras de briófitos sin identificar recogidas por Emilio Guinea en Bioco (Guinea Ecuatorial) en 1947. Veintisiete taxones son el resultado de este estudio, siendo nueve de ellos novedad para Guinea Ecuatorial y dos ...

  11. CONTRASTING ARBOREAL AND TERRESTRIAL BRYOPHYTES COMMUNITIES OF THE MOUNT HALIMUN SALAK NATIONAL PARK, WEST JAVA

    Directory of Open Access Journals (Sweden)

    NUNIK S. ARIYANTI

    2011-04-01

    Full Text Available Bryophyte communities were compared between arboreal (trunk bases and terrestrialhabitats in primary forest Mount Halimun Salak National Park, West Java. The communitieswere analyzed based on species diversity, abundance, and biomass. A total of 150 bryophytesspecies were identified, including 67 species of mosses (Bryopsida and 83 of liverworts(Hepaticopsida. Both bryophyte groups varied in diversity and abundance between arborealand terrestrial communities as well as among different elevations. Species diversity of arborealhabitats (116 species was higher than that of terrestrial habitats (64 species. Moss species weremore abundant in terms of coverage in terrestrial habitats whereas liverworts species weremore abundant in arboreal habitats. Species richness in both terrestrial and arboreal habitatsdecreased towards higher elevation, whereas the abundance increased.

  12. Bryophyte-cyanobacteria associations during primary succession in recently Deglaciated areas of Tierra del Fuego (Chile).

    Science.gov (United States)

    Arróniz-Crespo, María; Pérez-Ortega, Sergio; De Los Ríos, Asunción; Green, T G Allan; Ochoa-Hueso, Raúl; Casermeiro, Miguel Ángel; de la Cruz, María Teresa; Pintado, Ana; Palacios, David; Rozzi, Ricardo; Tysklind, Niklas; Sancho, Leopoldo G

    2014-01-01

    Bryophyte establishment represents a positive feedback process that enhances soil development in newly exposed terrain. Further, biological nitrogen (N) fixation by cyanobacteria in association with mosses can be an important supply of N to terrestrial ecosystems, however the role of these associations during post-glacial primary succession is not yet fully understood. Here, we analyzed chronosequences in front of two receding glaciers with contrasting climatic conditions (wetter vs drier) at Cordillera Darwin (Tierra del Fuego) and found that most mosses had the capacity to support an epiphytic flora of cyanobacteria and exhibited high rates of N2 fixation. Pioneer moss-cyanobacteria associations showed the highest N2 fixation rates (4.60 and 4.96 µg N g-1 bryo. d-1) very early after glacier retreat (4 and 7 years) which may help accelerate soil development under wetter conditions. In drier climate, N2 fixation on bryophyte-cyanobacteria associations was also high (0.94 and 1.42 µg N g-1 bryo. d-1) but peaked at intermediate-aged sites (26 and 66 years). N2 fixation capacity on bryophytes was primarily driven by epiphytic cyanobacteria abundance rather than community composition. Most liverworts showed low colonization and N2 fixation rates, and mosses did not exhibit consistent differences across life forms and habitat (saxicolous vs terricolous). We also found a clear relationship between cyanobacteria genera and the stages of ecological succession, but no relationship was found with host species identity. Glacier forelands in Tierra del Fuego show fast rates of soil transformation which imply large quantities of N inputs. Our results highlight the potential contribution of bryophyte-cyanobacteria associations to N accumulation during post-glacial primary succession and further describe the factors that drive N2-fixation rates in post-glacial areas with very low N deposition.

  13. Estimating global carbon uptake by lichens and bryophytes with a process-based model

    OpenAIRE

    Porada, P.; Weber, B.; Elbert, W.; Pöschl, U.; Kleidon, A.

    2013-01-01

    Lichens and bryophytes are abundant globally and they may even form the dominant autotrophs in (sub)polar ecosystems, in deserts and at high altitudes. Moreover, they can be found in large amounts as epiphytes in old-growth forests. Here, we present the first process-based model which estimates the net carbon uptake by these organisms at the global scale, thus assessing their significance for biogeochemical cycles. The model uses gridded climate data and key properties of th...

  14. Bryophyte-cyanobacteria associations during primary succession in recently Deglaciated areas of Tierra del Fuego (Chile.

    Directory of Open Access Journals (Sweden)

    María Arróniz-Crespo

    Full Text Available Bryophyte establishment represents a positive feedback process that enhances soil development in newly exposed terrain. Further, biological nitrogen (N fixation by cyanobacteria in association with mosses can be an important supply of N to terrestrial ecosystems, however the role of these associations during post-glacial primary succession is not yet fully understood. Here, we analyzed chronosequences in front of two receding glaciers with contrasting climatic conditions (wetter vs drier at Cordillera Darwin (Tierra del Fuego and found that most mosses had the capacity to support an epiphytic flora of cyanobacteria and exhibited high rates of N2 fixation. Pioneer moss-cyanobacteria associations showed the highest N2 fixation rates (4.60 and 4.96 µg N g-1 bryo. d-1 very early after glacier retreat (4 and 7 years which may help accelerate soil development under wetter conditions. In drier climate, N2 fixation on bryophyte-cyanobacteria associations was also high (0.94 and 1.42 µg N g-1 bryo. d-1 but peaked at intermediate-aged sites (26 and 66 years. N2 fixation capacity on bryophytes was primarily driven by epiphytic cyanobacteria abundance rather than community composition. Most liverworts showed low colonization and N2 fixation rates, and mosses did not exhibit consistent differences across life forms and habitat (saxicolous vs terricolous. We also found a clear relationship between cyanobacteria genera and the stages of ecological succession, but no relationship was found with host species identity. Glacier forelands in Tierra del Fuego show fast rates of soil transformation which imply large quantities of N inputs. Our results highlight the potential contribution of bryophyte-cyanobacteria associations to N accumulation during post-glacial primary succession and further describe the factors that drive N2-fixation rates in post-glacial areas with very low N deposition.

  15. Geographical, temporal and environmental determinants of bryophyte species richness in the Macaronesian islands.

    Science.gov (United States)

    Aranda, Silvia C; Gabriel, Rosalina; Borges, Paulo A V; Santos, Ana M C; de Azevedo, Eduardo Brito; Patiño, Jairo; Hortal, Joaquín; Lobo, Jorge M

    2014-01-01

    Species richness on oceanic islands has been related to a series of ecological factors including island size and isolation (i.e. the Equilibrium Model of Island Biogeography, EMIB), habitat diversity, climate (i.e., temperature and precipitation) and more recently island ontogeny (i.e. the General Dynamic Model of oceanic island biogeography, GDM). Here we evaluate the relationship of these factors with the diversity of bryophytes in the Macaronesian region (Azores, Madeira, Canary Islands and Cape Verde). The predictive power of EMIB, habitat diversity, climate and the GDM on total bryophyte richness, as well as moss and liverwort richness (the two dominant bryophyte groups), was evaluated through ordinary least squares regressions. After choosing the best subset of variables using inference statistics, we used partial regression analyses to identify the independent and shared effects of each model. The variables included within each model were similar for mosses and liverworts, with orographic mist layer being one of the most important predictors of richness. Models combining climate with either the GDM or habitat diversity explained most of richness variation (up to 91%). There was a high portion of shared variance between all pairwise combinations of factors in mosses, while in liverworts around half of the variability in species richness was accounted for exclusively by climate. Our results suggest that the effects of climate and habitat are strong and prevalent in this region, while geographical factors have limited influence on Macaronesian bryophyte diversity. Although climate is of great importance for liverwort richness, in mosses its effect is similar to or, at least, indiscernible from the effect of habitat diversity and, strikingly, the effect of island ontogeny. These results indicate that for highly vagile taxa on oceanic islands, the dispersal process may be less important for successful colonization than the availability of suitable ecological

  16. Life Strategies and Adaptations in Bryophytes from the Near and Middle East

    OpenAIRE

    KÜRSCHNER, Harald

    2014-01-01

    A review article on life strategies and ecomorphological adaptations (xerothalloid and xeropottioid life syndromes) of bryophytes is given, based on the hitherto known and analysed terrestrial, saxicolous and epiphytic communities of the Near and Middle East. The examples given impressively demonstrate common adaptive trends that arise convergently but independently in unrelated taxa when they evolve under similar habitat conditions. These functional types are important for the establishment,...

  17. Geographical, temporal and environmental determinants of bryophyte species richness in the Macaronesian islands.

    Directory of Open Access Journals (Sweden)

    Silvia C Aranda

    Full Text Available Species richness on oceanic islands has been related to a series of ecological factors including island size and isolation (i.e. the Equilibrium Model of Island Biogeography, EMIB, habitat diversity, climate (i.e., temperature and precipitation and more recently island ontogeny (i.e. the General Dynamic Model of oceanic island biogeography, GDM. Here we evaluate the relationship of these factors with the diversity of bryophytes in the Macaronesian region (Azores, Madeira, Canary Islands and Cape Verde. The predictive power of EMIB, habitat diversity, climate and the GDM on total bryophyte richness, as well as moss and liverwort richness (the two dominant bryophyte groups, was evaluated through ordinary least squares regressions. After choosing the best subset of variables using inference statistics, we used partial regression analyses to identify the independent and shared effects of each model. The variables included within each model were similar for mosses and liverworts, with orographic mist layer being one of the most important predictors of richness. Models combining climate with either the GDM or habitat diversity explained most of richness variation (up to 91%. There was a high portion of shared variance between all pairwise combinations of factors in mosses, while in liverworts around half of the variability in species richness was accounted for exclusively by climate. Our results suggest that the effects of climate and habitat are strong and prevalent in this region, while geographical factors have limited influence on Macaronesian bryophyte diversity. Although climate is of great importance for liverwort richness, in mosses its effect is similar to or, at least, indiscernible from the effect of habitat diversity and, strikingly, the effect of island ontogeny. These results indicate that for highly vagile taxa on oceanic islands, the dispersal process may be less important for successful colonization than the availability of suitable

  18. Southern Thailand Bryophytes III: A preliminary study on non-epiphyllous taxa in lowland areas

    Directory of Open Access Journals (Sweden)

    Tamás Pócs

    2016-06-01

    Full Text Available Examination of a collection of non-epiphyllous bryophytes from lowland areas of Phang Nga, Phuket and Surat Thani province yielded 38 liverwort and 29 moss species. Microlejeunea filicuspis (Steph. Heinrichs. et al., is new to Thailand and additional ten proved to be rarely recorded in this country, being hitherto known only from one other locality. Locality data and habitats are provided for each species and information on oil bodies is given for several species.

  19. Modeling species distributions from heterogeneous data for the biogeographic regionalization of the European bryophyte flora.

    Directory of Open Access Journals (Sweden)

    Rubén G Mateo

    Full Text Available The definition of biogeographic regions provides a fundamental framework for a range of basic and applied questions in biogeography, evolutionary biology, systematics and conservation. Previous research suggested that environmental forcing results in highly congruent regionalization patterns across taxa, but that the size and number of regions depends on the dispersal ability of the taxa considered. We produced a biogeographic regionalization of European bryophytes and hypothesized that (1 regions defined for bryophytes would differ from those defined for other taxa due to the highly specific eco-physiology of the group and (2 their high dispersal ability would result in the resolution of few, large regions. Species distributions were recorded using 10,000 km2 MGRS pixels. Because of the lack of data across large portions of the area, species distribution models employing macroclimatic variables as predictors were used to determine the potential composition of empty pixels. K-means clustering analyses of the pixels based on their potential species composition were employed to define biogeographic regions. The optimal number of regions was determined by v-fold cross-validation and Moran's I statistic. The spatial congruence of the regions identified from their potential bryophyte assemblages with large-scale vegetation patterns is at odds with our primary hypothesis. This reinforces the notion that post-glacial migration patterns might have been much more similar in bryophytes and vascular plants than previously thought. The substantially lower optimal number of clusters and the absence of nested patterns within the main biogeographic regions, as compared to identical analyses in vascular plants, support our second hypothesis. The modelling approach implemented here is, however, based on many assumptions that are discussed but can only be tested when additional data on species distributions become available, highlighting the substantial

  20. Modeling species distributions from heterogeneous data for the biogeographic regionalization of the European bryophyte flora.

    Science.gov (United States)

    Mateo, Rubén G; Vanderpoorten, Alain; Muñoz, Jesús; Laenen, Benjamin; Désamoré, Aurélie

    2013-01-01

    The definition of biogeographic regions provides a fundamental framework for a range of basic and applied questions in biogeography, evolutionary biology, systematics and conservation. Previous research suggested that environmental forcing results in highly congruent regionalization patterns across taxa, but that the size and number of regions depends on the dispersal ability of the taxa considered. We produced a biogeographic regionalization of European bryophytes and hypothesized that (1) regions defined for bryophytes would differ from those defined for other taxa due to the highly specific eco-physiology of the group and (2) their high dispersal ability would result in the resolution of few, large regions. Species distributions were recorded using 10,000 km2 MGRS pixels. Because of the lack of data across large portions of the area, species distribution models employing macroclimatic variables as predictors were used to determine the potential composition of empty pixels. K-means clustering analyses of the pixels based on their potential species composition were employed to define biogeographic regions. The optimal number of regions was determined by v-fold cross-validation and Moran's I statistic. The spatial congruence of the regions identified from their potential bryophyte assemblages with large-scale vegetation patterns is at odds with our primary hypothesis. This reinforces the notion that post-glacial migration patterns might have been much more similar in bryophytes and vascular plants than previously thought. The substantially lower optimal number of clusters and the absence of nested patterns within the main biogeographic regions, as compared to identical analyses in vascular plants, support our second hypothesis. The modelling approach implemented here is, however, based on many assumptions that are discussed but can only be tested when additional data on species distributions become available, highlighting the substantial importance of developing

  1. Biomass and selected ecological factors of epiphytic bryophyte along altitudinal gradients in Southern Thailand

    Directory of Open Access Journals (Sweden)

    Sahut Chantanaorrapint

    2011-12-01

    Full Text Available Biomass of epiphytic bryophytes was investigated along three altitudinal transects in southern Thailand: TarutaoNational Park (25-700 m, Khao Nan National Park (400-1,300 m, and Khao Luang National Park (400-1,500 m. The dry weightof epiphytic bryophytes per surface area increased from 1.15 g/m2 in the lowland to a maximum 199 g/m2 at the lower montaneforests. The estimation of dry weight per hectare increased along transect from 2.4 to 620 kg. The water storing capacity ofepiphytic bryophytes was about 1.2 to 2.4 times as dry weight and was generally higher in the lower montane forest (up to1,500 l/ha than in the lowland forests. The bark pH of host trees range between 3.19 and 6.84, and show negative correlationwith the altitude (r=-0.635, p<0.05. Air temperature gradually decreases with the increasing altitude ca 0.6°C per 100 m elevation.

  2. Effects of air pollution from road transport on growth and physiology of six transplanted bryophyte species

    Energy Technology Data Exchange (ETDEWEB)

    Bignal, Keeley L. [Department of Geography and Environmental Science, University of Bradford, Bradford BD7 1DP (United Kingdom)], E-mail: k.bignal@sussex.ac.uk; Ashmore, Mike R. [Department of Geography and Environmental Science, University of Bradford, Bradford BD7 1DP (United Kingdom)], E-mail: ma512@york.ac.uk; Headley, Alistair D. [Department of Geography and Environmental Science, University of Bradford, Bradford BD7 1DP (United Kingdom)], E-mail: alistairheadley@aol.com

    2008-11-15

    Motor vehicles emit a cocktail of pollutants; however, little is known about the effects of these pollutants on bryophytes located in roadside habitats. Six bryophyte species were transplanted to either a woodland or a moorland site adjacent to a motorway, and were monitored over seven months from autumn through to spring. All species showed an increase in one or more of the following near the motorway: growth, membrane leakage, chlorophyll concentration, and nitrogen concentration. The strongest effects were observed in the first 50-100 m from the motorway: this was consistent with the nitrogen dioxide pollution profile, which decreased to background levels at a distance of 100-125 m. It is hypothesised that motor vehicle pollution was responsible for the effects observed, and that nitrogen oxides had a key influence. The observed effects may lead to changes in vegetation composition with significant implications for nature conservation and management of roadside sites. - Motor vehicle pollution has significant effects on the growth, membrane leakage, chlorophyll and nitrogen content of bryophytes.

  3. Changes in bryophyte and lichen communities on Scots pines along an alkaline dust pollution gradient.

    Science.gov (United States)

    Degtjarenko, Polina; Marmor, Liis; Randlane, Tiina

    2016-09-01

    Dust pollution can cause a significant damage of environment and endanger human health. Our study aimed to investigate epiphytic lichens and bryophytes in relation to long-term alkaline dust pollution and provide new insights into the bioindicators of dust pollution. We measured the bark pH of Scots pines and the species richness and cover of two cryptogam groups in 32 sample plots in the vicinity of limestone quarries (up to ca. 3 km) in northern Estonia. The bark pH decreased gradually with increasing distance from quarries. We recorded the changes in natural epiphytic communities, resulting in diversified artificial communities on pines near the pollution source; the distance over 2 km from the quarries was sufficient to re-establish the normal acidity of the bark and natural communities of both lichens and bryophytes. The cover of lichens and the number of bryophytes are a more promising indicator of environmental conditions than individual species occurrence. We confirmed previously proposed and suggested new bioindicator species of dust pollution (e.g., Lecidella elaeochroma, Opegrapha varia, Schistidium apocarpum). Limestone quarrying activity revealed a "parapositive" impact on cryptogamic communities, meaning that quarrying might, besides disturbances of natural communities, temporarily contribute to the distribution of locally rare species.

  4. Bryophyte diversity and range size distribution along two altitudinal gradients: Continent vs. island

    Science.gov (United States)

    Ah-Peng, Claudine; Wilding, Nicholas; Kluge, Juergen; Descamps-Julien, Blandine; Bardat, Jacques; Chuah-Petiot, Min; Strasberg, Dominique; Hedderson, Terry A. J.

    2012-07-01

    We compare patterns of bryophyte diversity and variation in species altitudinal ranges between a continental and an island altitudinal gradient. We use our ecological data set along the highest summit (Piton des Neiges, 3069 m) of Réunion Island (Mascarene archipelago) and compare it to available published data of another high volcanic massif in Colombia (Nevado del Ruiz, 5321 m). The distribution of narrow-ranged and large-ranged species was investigated. We tested the effect of geometric constraints on species distribution along the two gradients by comparing empirical to predicted data using the Mid-Domain Null Programme (McCain, 2004). Species richness was comparable between the island and continental gradient for epiphytic bryophytes, 265 and 295 species respectively. The comparison between the two tropical high mountains demonstrates important differences in the distribution of range sizes with altitude and a dominance of species with small range sizes on the Réunion gradient. For the island gradient, mean altitudinal range increases with altitude whilst concurrently species richness decreases revealing a Rapoport effect in altitudinal distribution of bryophyte communities. Geometric constraints did not explain much of the species richness pattern for the island. Conversely, for the continental gradient, dominated by large-ranged species, geometric constraints could not be ruled out as a primary structuring feature for the species richness pattern. This study also highlights that the island's cloud forest hosts not only high species richness but also high number of rare species, which is of prime interest for conservation planners.

  5. Could the canopy structure of bryophytes serve as an indicator of microbial biodiversity? A test for testate amoebae and microcrustaceans from a subtropical cloud forest in Dominican Republic.

    Science.gov (United States)

    Acosta-Mercado, D; Cancel-Morales, N; Chinea, J D; Santos-Flores, C J; De Jesús, I Sastre

    2012-07-01

    The mechanisms that ultimately regulate the diversity of microbial eukaryotic communities in bryophyte ecosystems remain a contentious topic in microbial ecology. Although there is robust consensus that abiotic factors, such as water chemistry of the bryophyte and pH, explain a significant proportion of protist and microcrustacean diversity, there is no systematic assessment of the role of bryophyte habitat complexity on such prominent microbial groups. Water-holding capacity is correlated with bryophyte morphology and canopy structure. Similarly, canopy structure explains biodiversity dynamics of the macrobiota suggesting that canopy structure may also be a potential parameter for understanding microbial diversity. Canopy roughness of the dominant bryophyte species within the Bahoruco Cloud Forest, Cachote, Dominican Republic, concomitant with their associated diversity of testate amoebae and microcrustaceans was estimated to determine whether canopy structure could be added to the list of factors explaining microbial biodiversity in bryophytes. We hypothesized that smooth (with high moisture content) canopies will have higher species richness, density, and biomass of testate amoebae and higher richness and density of microcrustaceans than rough (desiccation-prone) canopies. For testate amoebae, we found 83 morphospecies with relative low abundances. Species richness and density differed among bryophytes with different bryophyte canopy structures and based on non-metric multidimensional scaling, canopy roughness explained 25% of the variation in species composition although not as predicted. Acroporium pungens (low roughness, LR) had the lowest species richness (2 ± 0.61 SD per gram dry weight bryophyte), and density (2.1 ± 0.61 SD individual per gram of dry weight bryophyte); whereas Thuidium urceolatum (high roughness) had the highest richness (24 ± 10.82 SD) and density (94 ± 64.30 SD). The fact that the bryophyte with the highest roughness had the highest

  6. Response of epiphytic bryophytes to simulated N deposition in a subtropical montane cloud forest in southwestern China.

    Science.gov (United States)

    Song, Liang; Liu, Wen-Yao; Ma, Wen-Zhang; Qi, Jin-Hua

    2012-11-01

    A field manipulation experiment was conducted in a subtropical montane cloud forest in southwestern China to determine the possible responses of epiphytic bryophytes to increasing nitrogen (N) deposition from community to physiology level, and to find sensitive epiphytic bryophytes that may be used as indicators for assessing the degree of N pollution. N addition had significantly negative effects on species richness and cover of the epiphytic bryophyte community. Harmful effects of high N loads were recorded for chlorophyll, growth, and vitality of the species tested. The decline of some epiphytic bryophytes may result from detrimental effects on degradation to photosynthetic pigments. Bazzania himalayana (Mitt.) Schiffn., Bazzania ovistipula (Steph.) Mizut., and Homaliodendron flabellatum (Sm.) Fleisch. are candidates in atmospheric nitrogen monitoring. Epiphytic bryophytes in the montane cloud forest are very sensitive to increasing N deposition and often difficult to recover once they have been destroyed, providing early detection of enhanced N pollution for trees or even the whole forest ecosystem. The inference that increasing N pollution may lead to loss of biodiversity is a concern to the developing economy in western China, and should alert the government to the adverse impacts caused by increased industrial pollution during the process of China's West Development.

  7. Distribution of rare earths, thorium and uranium in bryophytes and soils in Tripui Ecological Station, Minas Gerais, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Palmieri, Helena E.L. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil)], E-mail: help@cdtn.br; Nalini Junior, Herminio A. [Universidade Federal de Ouro Preto (UFOP), MG (Brazil). Dept. de Geologia], E-mail: nalini@degeo.ufop.br; Friese, Kurt [Helmholtz Centre for Environmental Research- UFZ, Magdeburg (Germany). Dept. of Lake Research], E-mail: kurt.friese@ufz.de

    2007-07-01

    The concentrations of rare earth elements (REEs), thorium and uranium were determined in liverworts (Noteroclada confluens (Tayl.) and Dumortirea hirsute (Sw.) Nees), in mosses (Leucobryum martianum (Hornsh.) Hampe, Vesicularia vesicularis (Schwaegr.) Broth., Pyrrhobruym spiniforme (Hedw.) Mitt. and Sematophyllum subsimplex (Hedw.) Mitt.) and in the soil upon which they were growing. The samples were collected on the margins of the main streams of the Tripui Ecological Station, located in the valley of the Tripui stream near the town of Ouro Preto, Minas Gerais State, Brazil. For decades, this Station has been the object of interest of many studies due to its historical, ecological and environmental importance. Analyses in bryophytes (mosses and liverworts) were determined by inductively coupled plasma mass spectrometry (ICP-MS) and in the soil samples by using neutron activation analysis (NAA), specifically the k{sub 0}-standardization method and the energy dispersive spectrometry technique (EDS). Lanthanum (La), cerium (Ce) and neodymium (Nd) were present in higher concentrations in soils and bryophytes than other REEs. It was observed that in all the collected bryophytes species the elements Th, U, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Yb were transferred from the soil water to these plants. These bryophytes presented different capacities of accumulating these elements with the liverworts (Noteroclada confluens and Dumortirea hirsute) and the moss Leucobryum martianum showing a more efficient accumulation capacity than the other bryophyte species. (author)

  8. [Relationships between distribution of soil-born bryophytes in urban area of Hangzhou and related ecological factors].

    Science.gov (United States)

    Liu, Yan; Cao, Tong; Wang, Jian; Cao, Yang

    2008-04-01

    At the 21 sampling sites in urban area of Hangzhou, 47 species of soil-born bryophytes belonging to 31 genera and 22 families were recorded. Based on the ecological importance value of these species and the data of ecological factors at the sampling sites, the relationships between the distribution of the bryophytes species in urban area of Hangzhou and related ecological factors were studied by canonical correspondence analysis. The results showed that human disturbance and soil pH were the most important factors determining the distribution of the bryophytes. In urban parks and green lands where human disturbance was greater, soil pH was alkali, and the species were mainly belonging to the genera of Haplocladium and Bryum and the family of Pottiaceae. In hilly area where human disturbance was lesser, soil pH turned to acidic, and the bryophytes were more, with pleurocarpous mosses and liverworts being relatively rich. The niche width of the 47 bryophytes was calculated, which revealed that most of them had very narrow niche width (<0.1). The Pseudotaxiphyllum pohliaecarpum widely distributed in the hilly area of southwest Xihu Lake had the widest niche width (0.3510), followed by Trichostomum planifolium (0.2239) and Haplocladium microphyllum (0.2185), the commonest species in the parks and greenlands in urban area of Hangzhou.

  9. Diversity and cold adaptation of culturable endophytic fungi from bryophytes in the Fildes Region, King George Island, maritime Antarctica.

    Science.gov (United States)

    Zhang, Tao; Zhang, Yu-Qin; Liu, Hong-Yu; Wei, Yu-Zhen; Li, Hai-Long; Su, Jing; Zhao, Li-Xun; Yu, Li-Yan

    2013-04-01

    Endophytic fungi associated with three bryophyte species in the Fildes Region, King George Island, maritime Antarctica, that is, the liverwort Barbilophozia hatcheri, the mosses Chorisodontium aciphyllum and Sanionia uncinata, were studied by culture-dependent method. A total of 128 endophytic fungi were isolated from 1329 tissue segments of 14 samples. The colonization rate of endophytic fungi in three bryophytes species were 12.3%, 12.1%, and 8.7%, respectively. These isolates were identified to 21 taxa, with 15 Ascomycota, 5 Basidiomycota, and 1 unidentified fungus, based on morphological characteristics and sequence analyses of ITS region and D1/D2 domain. The dominant fungal endophyte was Hyaloscyphaceae sp. in B. hatcheri, Rhizoscyphus sp. in C. aciphyllum, and one unidentified fungus in S. uncinata; and their relative frequencies were 33.3%, 32.1%, and 80.0%, respectively. Furthermore, different Shannon-Weiner diversity indices (0.91-1.99) for endophytic fungi and low endophytic fungal composition similarities (0.19-0.40) were found in three bryophyte species. Growth temperature tests indicated that 21 taxa belong to psychrophiles (9), psychrotrophs (11), and mesophile (1). The results herein demonstrate that the Antarctic bryophytes are an interesting source of fungal endophytes and the endophytic fungal composition is different among the bryophyte species, and suggest that these fungal endophytes are adapted to cold stress in Antarctica.

  10. Diversity and distribution of epiphytic bryophytes on Bramley’s Seedling trees in East of England apple orchards

    Directory of Open Access Journals (Sweden)

    M. Whitelaw

    2015-07-01

    Full Text Available Epiphytic bryophytes on apple trees were investigated in relation to a selection of tree characteristics. Management of orchard trees for fruit production affects the habitats available for colonisation and growth of epiphytes on trunks and branches. Bryophytes recorded on Bramley’s Seedling apple trees in orchards in Hertfordshire and Cambridgeshire showed a high level of similarity in species composition between the orchards. The similarity between orchards was, however, much reduced when relative species cover on the trees was taken into account. Twenty three species were recorded on the 71 trees sampled for detailed investigation. Tree structure, as determined by management, explained about 10% of the observed variation in bryophyte cover. Within that, trunk girth and distance to nearest neighbouring orchard trees were the most important factors. This information is of value to orchard managers aiming to become more proactive in managing their habitats for the benefit of biodiversity.

  11. Forests regenerating after clear-cutting function as habitat for bryophyte and lichen species of conservation concern.

    Directory of Open Access Journals (Sweden)

    Jörgen Rudolphi

    Full Text Available The majority of managed forests in Fennoscandia are younger than 70 years old but yet little is known about their potential to host rare and threatened species. In this study, we examined red-listed bryophytes and lichens in 19 young stands originating from clear-cutting (30-70 years old in the boreal region, finding 19 red-listed species (six bryophytes and 13 lichens. We used adjoining old stands, which most likely never had been clear-cut, as reference. The old stands contained significantly more species, but when taking the amount of biological legacies (i.e., remaining deciduous trees and dead wood from the previous forest generation into account, bryophyte species number did not differ between old and young stands, and lichen number was even higher in young stands. No dispersal effect could be detected from the old to the young stands. The amount of wetlands in the surroundings was important for bryophytes, as was the area of old forest for both lichens and bryophytes. A cardinal position of young stands to the north of old stands was beneficial to red-listed bryophytes as well as lichens. We conclude that young forest plantations may function as habitat for red-listed species, but that this depends on presence of structures from the previous forest generation, and also on qualities in the surrounding landscape. Nevertheless, at repeated clear-cuttings, a successive decrease in species populations in young production stands is likely, due to increased fragmentation and reduced substrate amounts. Retention of dead wood and deciduous trees might be efficient conservation measures. Although priority needs to be given to preservation of remnant old-growth forests, we argue that young forests rich in biological legacies and located in landscapes with high amounts of old forests may have a conservation value.

  12. Forests regenerating after clear-cutting function as habitat for bryophyte and lichen species of conservation concern.

    Science.gov (United States)

    Rudolphi, Jörgen; Gustafsson, Lena

    2011-04-07

    The majority of managed forests in Fennoscandia are younger than 70 years old but yet little is known about their potential to host rare and threatened species. In this study, we examined red-listed bryophytes and lichens in 19 young stands originating from clear-cutting (30-70 years old) in the boreal region, finding 19 red-listed species (six bryophytes and 13 lichens). We used adjoining old stands, which most likely never had been clear-cut, as reference. The old stands contained significantly more species, but when taking the amount of biological legacies (i.e., remaining deciduous trees and dead wood) from the previous forest generation into account, bryophyte species number did not differ between old and young stands, and lichen number was even higher in young stands. No dispersal effect could be detected from the old to the young stands. The amount of wetlands in the surroundings was important for bryophytes, as was the area of old forest for both lichens and bryophytes. A cardinal position of young stands to the north of old stands was beneficial to red-listed bryophytes as well as lichens. We conclude that young forest plantations may function as habitat for red-listed species, but that this depends on presence of structures from the previous forest generation, and also on qualities in the surrounding landscape. Nevertheless, at repeated clear-cuttings, a successive decrease in species populations in young production stands is likely, due to increased fragmentation and reduced substrate amounts. Retention of dead wood and deciduous trees might be efficient conservation measures. Although priority needs to be given to preservation of remnant old-growth forests, we argue that young forests rich in biological legacies and located in landscapes with high amounts of old forests may have a conservation value.

  13. Rhynchostegium megapolitanum (Web. et Mohr) B.S.G.-A rare bryophyte in dune ecosystems of Zealand, Denmark

    DEFF Research Database (Denmark)

    Johnsen, Ib

    2014-01-01

    Rhynchostegium megapolitanum was observed during a study of the effects of the invasive non-native Rosa rugosa in a sand dune. The vascular as well as the epiphytic and epigeic cryptogam vegetation was recorded., and soil properties were measured. Epihytic lichens were abundant on dead or dying b...... branches of Rosa rugosa scrubs, under which the stable substrate and high light exposure provided growth conditions for an epigeic community dominated by lichens and bryophytes. The occurrence of the rare bryophyte Rhynchostegium megapolitanum is discussed...

  14. Forests Regenerating after Clear-Cutting Function as Habitat for Bryophyte and Lichen Species of Conservation Concern

    OpenAIRE

    Jörgen Rudolphi; Lena Gustafsson

    2011-01-01

    The majority of managed forests in Fennoscandia are younger than 70 years old but yet little is known about their potential to host rare and threatened species. In this study, we examined red-listed bryophytes and lichens in 19 young stands originating from clear-cutting (30–70 years old) in the boreal region, finding 19 red-listed species (six bryophytes and 13 lichens). We used adjoining old stands, which most likely never had been clear-cut, as reference. The old stands contained significa...

  15. Restricted variation in plant barcoding markers limits identification in closely related bryophyte species.

    Science.gov (United States)

    Hassel, Kristian; Segreto, Rossana; Ekrem, Torbjørn

    2013-11-01

    Species-level identification and delimitation of bryophytes using the proposed general barcode markers for land plants has been challenging. Bryophyta (mosses) is the second most species-rich group of land plants after angiosperms, and it is thus of great importance to find useful barcoding regions also for this group of plants. We investigated how the plastid regions atpF-atpH, rbcL and trnH-psbA and the nuclear ITS2 region performed as barcode markers on closely related bryophyte taxa of selected moss (Bartramia, Distichium, Fissidens, Meesia and Syntrichia) and liverwort (Blepharostoma) genera from boreal and arctic regions. We also evaluated how sequencing success of herbarium specimens is related to length of the sequenced fragment, specimen age and taxonomic group. Sequencing success was higher for shorter fragments and younger herbarium specimens, but was lower than expected in the genera Distichium and Fissidens, indicating imperfect universality of the primers used. None of the studied DNA barcode regions showed a consistent barcode gap across the studied genera. As a single locus, the region atpF-atpH performed slightly better than rbcL and ITS2 and much better than trnH-psbA in terms of grouping conspecific sequences in monophyletic groups. This marker also gave a higher percentage of correct hits when conducting blast searches on a local database of identified sequences. Concatenated data sets of two and three markers grouped more conspecific sequences in monophyletic groups, but the improvement was not great compared with atpF-atpH alone. A discussion of recent studies testing barcode regions for bryophytes is given. We conclude that atpF-atpH, rbcL and ITS2 are to be the most promising barcode markers for mosses.

  16. No increase in colonization rate of boreal bryophytes close to propagule sources.

    Science.gov (United States)

    Hylander, Kristoffer

    2009-01-01

    Knowledge of the process of recolonization, and which temporal and spatial scale it operates on, is central to our understanding of species distributions, metapopulation dynamics, regional extinction risks, and ecosystem resilience. In this study the recolonization pattern of boreal forest bryophytes was investigated in stands that had been clear-cut approximately 50 years ago. Species known to be sensitive to clear-cutting were inventoried in 23 mature forest stands and in adjacent young stands at 10, 20, 40, and 80 m from the former forest-clear-cut edge. Based on previous studies showing that bryophytes tend to be dispersal limited at local population levels, it was hypothesized that the recolonizaton of many bryophyte species should be higher closer to the mature forest edge. It was also hypothesized that some species would show full recovery, while for others the young stands would still be inhospitable. All these patterns were found for individual species, but the main pattern was, however, quite different. Most species had started to recolonize the young stands (i.e., little or much, depending on species), but without any tendency of a higher colonization rate close to the mature stands. Possible explanations for the limited signs of positive influence of local propagule sources might be microsite limitation or that the local propagule availability displays a rapid decline from its sources and is masked by a higher regional propagule rain. For organisms with light propagules able to build up a regional background level, the role of mature forest stands in the recolonization process of the matrix may rather be to contribute to the regional background level of spores in the landscape than to affect the adjacent stands directly.

  17. Diaspore bank of bryophytes in tropical rain forests: the importance of breeding system, phylum and microhabitat.

    Science.gov (United States)

    Maciel-Silva, Adaíses S; Válio, Ivany Ferraz Marques; Rydin, Håkan

    2012-02-01

    Diaspore banks are crucial for the maintenance and resilience of plant communities, but diaspore banks of bryophytes remain poorly known, especially from tropical ecosystems. This is the first study to focus on the role of diaspore banks of bryophytes in tropical rain forests. Our aim was to test whether microhabitat (substrate type) and species traits (breeding system, phylum) are important in explaining the diaspore bank composition. Using samples cultivated in the laboratory, we assessed the number of species and shoots emerging from bark, decaying wood and soil from two sites of the Atlantic rain forest (montane and sea level) in Brazil by comparing the contribution of species by phylum (mosses, liverworts) and breeding system (monoicous, dioicous). More species emerged from bark (68) and decaying wood (55) than from soil (22). Similar numbers of species were found at both sites. Mosses were more numerous in terms of number of species and shoots, and monoicous species dominated over dioicous species. Substrate pH had only weak effects on shoot emergence. Species commonly producing sporophytes and gemmae had a high contribution to the diaspore banks. These superficial diaspore banks represented the extant vegetation rather well, but held more monoicous species (probably short-lived species) compared to dioicous ones. We propose that diaspore bank dynamics are driven by species traits and microhabitat characteristics, and that short-term diaspore banks of bryophytes in tropical rain forests contribute to fast (re)establishment of species after disturbances and during succession, particularly dioicous mosses investing in asexual reproduction and monoicous mosses investing in sexual reproduction.

  18. Bryophytes from the Republic of Equatorial Guinea (West-Central Africa) : 1., introduction and preliminary checklist

    OpenAIRE

    1996-01-01

    A preliminary list consisting of 159 bryophyte taxa (82 liverworts and 77 mosses) has been compiled from the bryological literature on the Republic of Equatorial Guinea (Central-Western Africa) until 1995. A general overview of the physical features and vegetation of the country, and an account of the history of its bryological exploration are also included. Se han reunido en un catálogo preliminar los 159 táxones de briófitos (82 hepáticas y 77 musgos) de la República de Guinea Ecuatorial...

  19. Characterisation of Holocene plant macrofossils from North Spanish ombrotrophic mires: bryophytes

    Directory of Open Access Journals (Sweden)

    M. Souto

    2017-01-01

    Full Text Available The methods and criteria used for the identification of bryophytes from the peat deposits of four ombrotrophic mires in northern Spain are presented. Two liverworts and fifteen moss taxa were recorded. Twelve were identified to species level, two to genus level (Polytrichum sp., Campylopus sp. and another to section level (Sphagnum sect. Acutifolia. All taxa were identified from their vegetative remains, mainly leaves. Only sporangia of Sphagnum species were recorded. Descriptions of the most relevant characters for taxa identifications are shown, accompanied by illustrations that facilitate their interpretation. A dichotomous identification key is also provided.

  20. Pungent and bitter, cytotoxic and antiviral terpenoids from some bryophytes and inedible fungi.

    Science.gov (United States)

    Asakawa, Yoshinori; Nagashima, Fumihiro; Hashimoto, Toshihiro; Toyota, Masao; Ludwiczuk, Agnieszka; Komala, Ismiarni; Ito, Takuya; Yagi, Yasuyuki

    2014-03-01

    Most liverworts elaborate characteristic odiferous, pungent and bitter tasting compounds many of which show antimicrobial, antifungal, antiviral, allergenic contact dermatitis, cytotoxic, insecticidal, anti-HIV, superoxide anion radical release, plant growth regulatory, neurotrophic, NO production inhibitory, muscle relaxant, antiobesity, piscicidal and nematocidal activities. Several inedible mushrooms produce female spider pheromones, strong antioxidant, and cytotoxic compounds. The present paper is concerned with the extraction and isolation of terpenoids from some bryophytes and inedible fungi and their pungent and bitter taste, and cytotoxic and antiviral activity.

  1. Momilactone A and B as allelochemicals from moss Hypnum plumaeforme: first occurrence in bryophytes.

    Science.gov (United States)

    Nozaki, Hiroshi; Hayashi, Ken-ichiro; Nishimura, Naoki; Kawaide, Hiroshi; Matsuo, Akihiko; Takaoka, Daisuke

    2007-12-01

    Momilactones A (1) and B (2), which have been identified as phytoalexins in rice, were isolated from extracts of the moss Hypnum plumaeforme. This is the first isolation and identification of momilactones as allelochemicals from a bryophyte. H. plumaeforme produces considerable amounts of momilactones (isolated yield: 8.4 mg/Kg plant for 1; 4.2 mg/Kg for 2). EtOAc extracts from H. plumaeforme and 2 showed growth inhibitory activity against angiosperms, moss, and liverwort plants. On the other hand, the growth of H. plumaeforme was insensitive to its extract and 2. Our finding suggests that momilactones play an important role as allelochemicals in this moss.

  2. Interpreting bryophyte stable carbon isotope composition: Plants as temporal and spatial climate recorders

    Science.gov (United States)

    Royles, Jessica; Horwath, Aline B.; Griffiths, Howard

    2014-04-01

    are unable to control tissue water content although physiological adaptations allow growth in a wide range of habitats. Carbon isotope signals in two mosses (Syntrichia ruralis and Chorisodontium aciphyllum) and two liverworts (Conocephalum conicum and Marchantia polymorpha), whether instantaneous (real time, Δ13C), or organic matter (as δ13COM), provide an assimilation-weighted summary of bryophyte environmental adaptations. In mosses, δ13COM is within the measured range of Δ13C values, which suggests that other proxies, such as compound-specific organic signals, will be representative of historical photosynthetic and growth conditions. The liverworts were photosynthetically active over a wider range of relative water contents (RWC) than the mosses. There was a consistent 5‰ offset between Δ13C values in C. conicum and M. polymorpha, suggestive of greater diffusion limitation in the latter. Analysis of a C. aciphyllum moss-peat core showed the isotopic composition over the past 200 years reflects recent anthropogenic CO2 emissions. Once corrected for source-CO2 inputs, the seasonally integrated Δ13COM between 1350 and 2000 A.D. varied by 1.5‰ compared with potential range of the 12‰ measured experimentally, demonstrating the relatively narrow range of conditions under which the majority of net assimilation takes place. Carbon isotope discrimination also varies spatially, with a 4‰ shift in epiphytic bryophyte organic matter found between lowland Amazonia and upper montane tropical cloud forest in the Peruvian Andes, associated with increased diffusion limitation.

  3. 山东苔藓植物新记录%New records of Shandong bryophytes

    Institute of Scientific and Technical Information of China (English)

    李林; 任昭杰; 黄正莉; 郭萌萌; 赵遵田

    2013-01-01

    We identify more than 3000 specimens of bryophytes from Shandong province. We discover 1 new family, 10 new genera and 70 new species of bryophytes. The newly reported family is Trachypodaceae. The newly reported genera are Asterella, Kiaeria, Chenia, Epipterygium, Plagiobryum, etc. The newly reported species are Riccardia latifrons, Scapania massalongoi, Calypogeia tosana, Campylopus japonicus, C. schimperi, etc.%通过整理、鉴定采自于山东各山区的3 000余份苔藓植物标本,发现山东新记录科1个,为扭叶藓科(rrachypodaceae);山东新记录属10个,分别为花萼苔属(Asterella),凯氏藓属(Kiaeria),陈氏藓属(Chenia),小叶藓属(Epipterygium),平蒴藓属(Plagiobryum)等;山东新记录种70个,分别为宽片叶苔(Riccardia latifrons),腐木合叶苔(Scapania massalongoi),双齿护蒴苔(Calypogeia tosana),日本曲柄藓(Campylopus japonicus),辛氏曲柄藓(Campylopus schimperi)等.

  4. Human traces in the bryophyte flora of the summit region of Karkonosze Mts (Polish side

    Directory of Open Access Journals (Sweden)

    Ewa Fudali

    2011-01-01

    Full Text Available Based on results of the bryofloristic investigations carried out in 2006 along tourist roads and around mountain chalets the problem of bryophyte response to the tourist utilization of the summit region of Karkonosze Mts is discussed here. The hypothesis that introduction of cement as building material might have caused the income and spread of subneutral or basiphilous ruderal species in that naturally acidic region was formulated and tested. In result 45 species were found, of which the majority do not occur in natural sites in the Karkonosze Mts. Among them 20 species are convinced to be highly hemerophilous. Most of the found species were eurytopic, only 14 prefered subneutral or basic substrata. Many of them produced sporogonia, what indicates high reproduction potential. It seems that the phenomenon of synanthropisation is limited mainly to places in which cement (as mortar or concrete has been used. The list of bryophytes found around all the anthropogenic sites and along the tourist roads in the summit region of Polish part of the massif with brief characteristics of their ecological preferences has been included.

  5. Disentangling effects of uncertainties on population projections: climate change impact on an epixylic bryophyte.

    Science.gov (United States)

    Ruete, Alejandro; Yang, Wei; Bärring, Lars; Stenseth, Nils Chr; Snäll, Tord

    2012-08-01

    Assessment of future ecosystem risks should account for the relevant uncertainty sources. This means accounting for the joint effects of climate variables and using modelling techniques that allow proper treatment of uncertainties. We investigate the influence of three of the IPCC's scenarios of greenhouse gas emissions (special report on emission scenarios (SRES)) on projections of the future abundance of a bryophyte model species. We also compare the relative importance of uncertainty sources on the population projections. The whole chain global climate model (GCM)-regional climate model-population dynamics model is addressed. The uncertainty depends on both natural- and model-related sources, in particular on GCM uncertainty. Ignoring the uncertainties gives an unwarranted impression of confidence in the results. The most likely population development of the bryophyte Buxbaumia viridis towards the end of this century is negative: even with a low-emission scenario, there is more than a 65 per cent risk for the population to be halved. The conclusion of a population decline is valid for all SRES scenarios investigated. Uncertainties are no longer an obstacle, but a mandatory aspect to include in the viability analysis of populations.

  6. Using water, bryophytes, and macroinvertebrates to assess trace element concentrations in the Upper Colorado River Basin

    Science.gov (United States)

    Deacon, J.R.; Spahr, N.E.; Mize, S.V.; Boulger, R.W.

    2001-01-01

    This study examined trace elements concentrations and macroinvertebrate community structure at 32 sites in 22 streams in Colorado. Sites affected by mining activities (mining sites) and sites that were minimally disturbed (nonmining sites) were selected for the assessment. Water and transplanted aquatic bryophyte samples were analyzed for trace elements. Macroinvertebrate samples were collected to assess the effects of trace elements on the aquatic community of the stream. All samples of aquatic bryophytes had detectable concentrations of Cd, Cu, Pb and Zn. Principal components analysis of chemical and physical properties classified sites into three groups. The first group represented sites that were unaffected to minimally affected by mining activities; the second group was characterized by sites with Cd, Pb and Zn predominant in the mineralogy; and the third group was characterized by sites with Cu predominant in the mineralogy. Six macroinvertebrate families were common in the study area. Median values of total abundance, taxa richness and mayfly and stonefly abundance were reduced at mining sites. Abundances of Heptageniidae, Chloroperlidae and Rhyacophila and Baetis sp. also were reduced at sites with elevated trace element concentrations. Tanytarsini chironomids were most abundant at reference and minimally-disturbed sites.

  7. Briófitas de Manaus, Amazonas, Brasil Bryophytes from Manaus, Amazonas, Brazil

    Directory of Open Access Journals (Sweden)

    Olga Yano

    2004-09-01

    Full Text Available Foram listadas 74 espécies de briófitas para a cidade de Manaus, Amazonas, sendo 41 espécies de musgos distribuídos em 24 gêneros e 15 famílias e 33 hepáticas em 17 gêneros e sete famílias. Destas, 17 espécies de briófitas são ocorrências novas para Manaus e para o estado do Amazonas. T. ligulaefolium (Bartr. Buck é uma ocorrência nova para o Brasil. São apresentadas associações com outras briófitas e comparação com outras espécies urbanas.This survey lists 74 species of bryophytes from Manaus, Amazonas, namely, 41 species of mosses distributed in 24 genera and 15 families and 33 liverworts in 17 genera and seven families, of which, 17 species are new occurrences to Manaus. T. Ligulaefolium (Bartr. Buck is new occurrence to Brazil. Associations with other bryophytes and comparison with other regions are presented.

  8. Differences in the growth response of three bryophyte species to nitrogen

    Energy Technology Data Exchange (ETDEWEB)

    Salemaa, Maija [Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa (Finland)], E-mail: maija.salemaa@metla.fi; Maekipaeae, Raisa [Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa (Finland)], E-mail: raisa.makipaa@metla.fi; Oksanen, Jari [University of Oulu, Department of Biology, P.O. Box 3000, FI-90014 Oulu (Finland)], E-mail: jarioksa@sun3.oulu.fi

    2008-03-15

    The effect of nitrogen on biomass production, shoot elongation and relative density of the mosses Pleurozium schreberi, Hylocomium splendens and Dicranum polysetum was studied in a chamber experiment. Monocultures were exposed to 10 N levels ranging from 0.02 to 7.35 g N m{sup -2} during a 90-day period. All the growth responses were unimodal, but the species showed differences in the shape parameters of the curves. Hylocomium and Pleurozium achieved optimum biomass production at a lower N level than Dicranum. Pleurozium had the highest biomass production per tissue N concentration. Tolerance to N was the widest in Dicranum, whereas Hylocomium had the narrowest tolerance. Dicranum retained N less efficiently from precipitation than the other two species, which explained its deviating response. All species translocated some N from parent to new shoots. The results emphasize that the individual responses of bryophytes to N should be known when species are used as bioindicators. - Boreal bryophytes display differences in their sensitivity to nitrogen.

  9. Boulders increase resistance to clear-cut logging but not subsequent recolonization rates of boreal bryophytes.

    Science.gov (United States)

    Schmalholz, Martin; Hylander, Kristoffer

    2011-12-01

    The extent to which a plant assemblage might recolonize a disturbed system is in general related to the availability of propagule sources and sites with appropriate conditions for establishment. Both these factors might be sensitive to aspects of spatial heterogeneity. Microtopographic variation may enhance initial resistance by reducing the impact of the disturbance and facilitating establishment of incoming propagules by providing shaded "safe-sites". This study explores the influence of microtopographic heterogeneity (caused by variation in surface boulder cover) on the recolonization of closed-canopy forest floor bryophytes using a chronosequence of 75 spruce-dominated forests in south-central Sweden (2-163 years after clear-cutting). We found that high boulder cover did increase survival and subsequent persistence in young forests at both investigated scales (i.e. 1,000 and 100 m(2)), although this pattern became less evident on the smaller spatial scale. Species accumulation in boulder-poor subplots was not different when surrounded by boulder-rich compared with boulder-poor subplots suggesting short-distance recolonization from boulder-created refugia to be of little importance during recolonization. To conclude, it seems that boulders increase initial resistance to clear-cutting for this bryophyte guild, but that the subsequent recolonization process is more likely to depend on external propagule sources and factors affecting establishment such as the microclimate in the developing stand.

  10. Organic-matter retention and macroinvertebrate utilization of seasonally inundated bryophytes in a mid-order Piedmont River

    Science.gov (United States)

    Wood, James; Pattillo, Meryom; Freeman, Mary C.

    2016-01-01

    There is increased understanding of the role of bryophytes in supporting invertebrate biomass and for their influence on nutrient cycling and carbon balance in aquatic systems, but the structural and functional role of bryophytes growing in seasonally inundated habitats is substantially less studied. We conducted a study on the Middle Oconee River, near Athens, GA, to assess invertebrate abundance and organic-matter retention in seasonally inundated patches of the liverwort Porella pinnata, a species that tends to be submerged only when water levels in rivers are substantially above base flow. Aquatic invertebrate utilization of these seasonally inundated habitats has rarely been investigated. Macroinvertebrate biomass, insect density, and organic-matter content were significantly greater in patches of P. pinnata than on adjacent bare rock. Bryophyte biomass explained additional variation in organic matter, insect biomass, and density. The most abundant insects in P. pinnata patches were Dipterans and Plecopterans. Our results suggest an important structural role of seasonally inundated bryophyte habitats in riverine ecosystems.

  11. Analysis of Construction of Bryophytes landscape%苔藓植物景观营造探讨

    Institute of Scientific and Technical Information of China (English)

    贺晓波; 于红丽; 赖齐贤; 陈瑶; 何宝龙

    2012-01-01

    指出了苔藓植物不仅具有绿化、美化的作用,同时还具有独特的药用功效,在园林景观中具有广阔的应用前景。分析了苔藓植物的功能并初步探讨了苔藓植物在园林景观中的营造方式,以期为苔藓植物更好的在园林景观中广泛应用提供参考。%Bryophytes have bright prospects for landscape application not only because of their greening and beautitfying functions but also because of their unique medicinal function. There are more than 3400 species bryophytesin 670 genera and 125 families distributed in China . In this paper, it discusses the functions of the bryophytes and the construction of bryophytes landscape, so as to give better references for the application of bryophytes to landscaping.

  12. Arctic warming on two continents has consistent negativ effects on lichen diversity and mixed effects on bryophyte diversity

    NARCIS (Netherlands)

    Lang, S.I.; Cornelissen, J.H.C.; Shaver, G.R.; Ahrens, M.; Callaghan, T.V.; Molau, U.; Braak, ter C.J.F.; Hölzer, A.; Aerts, R.

    2012-01-01

    Little is known about the impact of changing temperature regimes on composition and diversity of cryptogam communities in the Arctic and Subarctic, despite the well-known importance of lichens and bryophytes to the functioning and climate feedbacks of northern ecosystems. We investigated changes in

  13. [Effects of bryophytes in dark coniferous forest of Changbai Mountains on three conifers seed germination and seedling growth].

    Science.gov (United States)

    Lin, Fei; Hao, Zhanqing; Ye, Ji; Jiang, Ping

    2006-08-01

    This paper studied the effects of Hylocomium splendens and Rhytidiadelphus triquetrus, the main bryophytes in dark coniferous forests of Changbai Mountains, on the seed germination and seedling growth of Pinus koraiensis, Picea koraiensis and Larix olgensis. The results indicated that at definite concentrations, the water extract of H. splendens inhibited Picea koraiensis seed germination, while that of R. triquetrus promoted it. Although the water extracts of the two bryophytes had no obvious effects on the seed germination of Picea koraiensis and Larix olgensis, they expedited the occurrence of the tree species' daily germination peak. The water extracts of test bryophytes inhibited the seedling growth of P. koraiensis and Picea koraiensis, but promoted that of Larix olgensis. The living shoots of the two bryophytes had no obvious effects on the seed germination of Picea koraiensis and Larix olgensis, but delayed the daily germination peak of Picea koraiensis while promoted that of Larix olgensis, andthe killed shoots inhibited the seed germination of all test tree species. Living shoots in larger amounts promoted the seedling growth of Picea koraiensis and Larix olgensis, but killed shoots were inadverse.

  14. Retention capacities of several bryophytes for Hg(II) with special reference to the elevation and morphology of moss growth.

    Science.gov (United States)

    Sun, Shou-Qin; Wang, Ding-Yong; He, Ming; Li, Xian-Yuan; Zhang, Cheng

    2007-10-01

    Hg(II) Retention capacities of nine bryophyte species, collected from Jinfo Mountains (JFM) in Chongqing, China, had been investigated with special reference to the effect of morphology and elevation of moss growth. Results indicated that adsorption capacities of bryophytes for Hg(II) became stronger with the increase of multi-branches and leafy-shoots, as well as the elevation of moss growth, which was observed both in adsorption isotherm and adsorption kinetics experiments. Contrarily, the desorption kinetics showed a decrease tendency with the increase of multi-branches and leafy-shoots and the elevation of moss growth. The results demonstrated that bryophytes with higher multi-branches and leafy-shoots and higher growth elevation had a stronger adsorption capacity and a weaker desorption tendency, and therefore had a stronger retention capacity to Hg(II). The results disclosed the different relative sensitivity and retention capacity of mosses to pollution resulting from heavy metals, due to the differences in growth elevation and morphology. These should be considered when bryophytes were chosen as a tool for biomonitoring materials to environmental pollution, especially caused by Hg(II).

  15. Seasonality of reproduction of epiphytic bryophytes in flooded forests from the Caxiuanã National Forest, Eastern Amazon

    Directory of Open Access Journals (Sweden)

    GABRIELA R. CERQUEIRA

    2016-06-01

    Full Text Available This work aimed to recognize the reproductive biology of the epiphytic bryoflora of phorophytes of Virola surinamensis (Rol. ex. Rottb. Warb. in várzea and igapó forests in the Caxiuanã National Forest, to answer the following question: The reproductive period of the bryophyte species is influenced by the environment due the climatic seasonality present in flooded forests, being higher the occurrence of the sexual and asexual reproduction in the rainiest months? The bryophytes were identified and analyzed for the type of reproduction, sexual system and reproductive structures. In total, 502 samples of bryophytes were analyzed, resulting in 54 species, of which 34 were fertile. The comparison of the fertility of the species in different environmental conditions (dry or rainy, and igapó or várzea forest was assessed using the chi-square test. The fertility of the seven studied species could not be defined by a pattern, considering the forest type and the seasonality. However, two species were associated to the forest type and two further species to the seasonality, showing that, for some bryophyte species, invest in constant fertility may be favoring the maintenance of their populations in tropical forests.

  16. A new function for cypress knees? Forest composition facilitates aquatic bryophyte extension of oxic periods in blackwater cyperess swaps

    Science.gov (United States)

    Limited aquatic primary productivity is often cited as a factor behind low oxygen levels observed in forested blackwater rivers. However, submerged trunks of the same trees that limit light with their canopy also provide stable substrate for growth of aquatic bryophytes. We use laboratory and fiel...

  17. Forest floor bryophytes of Pseudotsuga menziesii-Tsuga heterophylla stand in Oregon: Influences of substrate and overstory

    Science.gov (United States)

    Rambo, T.; Muir, Patricia S.

    1998-01-01

    Species richness and abundance of bryophytes inhabiting forest floor substrates were assessed at two sites in western Oregon. Bryophyte diversity, abundance, and community composition were compared between sites, and between young forest stands (~55 yrs) and old-growth stands (400 + yrs) within each site. Relationships of stand structural features to diversity and community composition were assessed by stratifying sampling between 'diversity' plots placed in areas of greater structural diversity, such as hardwood openings and remnant old-growth trees, and 'matrix' plots situated within the remaining more homogeneous conifer-dominated forest matrix. Richness, particularly for liverworts, was significantly higher in old-growth than young stands, and the two ages differed significantly in community composition. Substrate (ground versus coarse woody debris) and overstory (conifers versus hardwoods) were most strongly correlated with variation in community composition. Relatively open hardwood-dominated diversity plots differed in composition from matrix plots. Bryophyte abundance was lower in denser stands and plots, and positively correlated with canopy gaps, percentage of hardwoods, and incident solar radiation. These results suggest that availability of light may limit bryophyte productivity in these stands.

  18. 新疆园林绿化苔藓植物资源探析%Exploration of Landscaping Bryophyte Resources in Xinjiang

    Institute of Scientific and Technical Information of China (English)

    古再丽努尔·阿布都艾尼; 阿力甫·托呼提; 买买提明·苏来曼

    2013-01-01

    The characteristics of Bryophytes in Xinjiang and the Moss gardens of Japan were introduced,as well as application prospect of Bryophytes in environmental greening in Xinjiang.%主要介绍新疆苔藓植物以及日本苔藓公园的特点及环境友好型苔藓植物在新疆园林绿化中的应用前景.

  19. The Role of Explicitly Modeling Bryophytes in Simulating Carbon Exchange and Permafrost Dynamics of an Arctic Coastal Tundra at Barrow, Alaska

    Science.gov (United States)

    Yuan, F.; Thornton, P. E.; McGuire, A. D.; Oechel, W. C.; Yang, B.; Tweedie, C. E.; Rogers, A.; Norby, R. J.

    2013-12-01

    Bryophyte cover is greater than 50% in many Arctic tundra ecosystems. In regions of the Arctic where shrubs are expanding it is expected that bryophyte cover will be substantially reduced. Such a loss in cover could influence the hydrological, biogeochemical, and permafrost dynamics of Arctic tundra ecosystems. The explicit representation of bryophyte physiological and biophysical processes in large-scale ecological and land surface models is rare, and we hypothesize that the representation of bryophytes has consequences for estimates of the exchange of water, energy, and carbon by these models. This study explicitly represents the effects of bryophyte function and structure on the exchange of carbon (e.g., summer photosynthesis effects) and energy (e.g., summer insulation effects) with the atmosphere in the Community Land Model (CLM-CN). The modified model was evaluated for its ability to simulate C exchange, soil temperature, and soil moisture since the 1970s at Barrow, Alaska through comparison with data from AmeriFlux sites, USDA Soil Climate Networks observation sites at Barrow, and other sources. We also compare the outputs of the CLM-CN simulations with those of the recently developed Dynamical Organic Soil coupled Terrestrial Ecosystem Model (DOS-TEM). Overall, our evaluation indicates that bryophytes are important contributors to land-atmospheric C exchanges in Arctic tundra and that they play an important role to permafrost thermal and hydrological processes which are critical to permafrost stability. Our next step in this study is to examine the climate system effects of explicitly representing bryophyte dynamics in the land surface model. Key Words: Bryophytes, Arctic coastal tundra, Vegetation composition, Net Ecosystem Exchange, Permafrost, Land Surface Model, Terrestrial Ecosystem Model

  20. Influence of bryophyte biomass and organic matter quantity on the abundance and richness of oligochaetes in forest streams with different phytophysiognomies in southeastern Brazil

    Directory of Open Access Journals (Sweden)

    Luciana Falci Theza Rodrigues

    2016-02-01

    Full Text Available Aquatic oligochaetes can be found associated with different types of substrates; including bryophytes (mosses and liverworts adhered to stones in lotic ecosystems. However, little information is available on the association between oligochaetes and bryophytes in tropical region. Therefore, the aims of this study were: to investigate whether the assemblages of oligochaetes respond to variation in the biomass of bryophytes and quantity of particulate organic matter (POM present on these plants; verify differences in the composition of oligochaetes in streams flowing through areas with two phytophysiognomies (rocky field and seasonal semideciduous forest. The samples were collected from five first-order streams in the southeast of the state of Minas Gerais. Six samples of bryophytes adhered to stones were obtained from each stream. A total of 1586 oligochaetes were collected and 11 taxa were identified, belonging to the families Naididae and Enchytraeidae. The most abundant taxa were Bothrioneurum (37.95% and Enchytraeidae (33.01%. A positive relation was observed between oligochaete abundance and POM in two streams (Ibitipoca I and Ibitipoca III and a positive relation was found between oligochaete abundance and bryophyte biomass in one stream (Ibitipoca I. The composition of the fauna varied within and between the phytophysiognomies studied. The results show that the oligochaetes find favorable conditions to establish themselves in bryophytes, evidencing the ecological importance of these plants as habitat for invertebrates.

  1. Effects of engineered iron nanoparticles on the bryophyte, Physcomitrella patens (Hedw.) Bruch & Schimp, after foliar exposure.

    Science.gov (United States)

    Canivet, L; Dubot, P; Garçon, G; Denayer, F-O

    2015-03-01

    The effects of iron nanoparticles on bryophytes (Physcomitrella patens) were studied following foliar exposure. We used iron nanoparticles (Fe-NP) representative of industrial emissions from the metallurgical industries. After a characterization of iron nanoparticles and the validation of nanoparticle internalization in cells, the effects (cytotoxicity, oxidative stress, lipid peroxidation of membrane) of iron nanoparticles were determined through the axenic culturing of Physcomitrella patens exposed at five different concentrations (5 ng, 50 ng, 500 ng, 5 µg and 50 µg per plant). Following exposure, the plant health, measured as ATP concentrations, was not impacted. Moreover, we studied oxidative stress in three ways: through the measure of reactive oxygen species (ROS) production, through malondialdehyde (MDA) production and also through glutathione regulation. At concentrations tested over a short period, the level of ROS, MDA and glutathione were not significantly disturbed.

  2. The impact of bryophytes on the carbon stocks of northern boreal forest soils

    Science.gov (United States)

    Hagemann, U.; Moroni, M. T.; Shaw, C. H.; Kurz, W. A.

    2012-04-01

    -CFS3 default parameters. Modeled estimates of mainly wood- and bryophyte-derived organic layer C stocks were improved by reducing the respective base decay rate to 50% of default (0.0075 yr-1), thus reflecting the impact of bryophytes on organic layer decay rates. Mineral soil C stocks modeled using a preliminary soil type-specific decay rate (0.00207 yr-1) optimised for Humo-Ferric Podzols were in better agreement with field-measured values than default estimates. However, the incorporation of WD burial, which results in an increased transfer of C from the WD to the organic layer C pool, would require structural changes of the model. The model evaluation process highlighted the importance of accounting for bryophyte C dynamics, the physical burial of WD by bryophytes, and associated changes in organic layer and mineral soil decay rates in northern boreal forests.

  3. Accumulation of chromium and lead in bryophytes and pteridophytes in a stream affected by tannery wastewater.

    Science.gov (United States)

    Repula, Carolina Marília Martins; Quináia, Sueli Pércio; de Campos, Bruna Kauely; Ganzarolli, Edgard Moreira; Lopes, Mauro Chierici

    2012-01-01

    The concentrations of Cr and Pb were determined in bryophytes and pteridophytes sampled in a stream near a tannery in Guarapuava, southern Brazil. The concentrations of Cr and Pb were measured by cathodic and anodic voltammetry, respectively. These plants were used to evaluate the spatial distribution of elements in the examined stream, and contained elevated levels of Cr (0.71-24.07 μg/g) and Pb (4.33-24.20 μg/g). Chromium levels in plants near the tannery greatly exceeded background levels, indicating a severe to extreme degree of contamination with this metal. Lead levels were elevated to a lesser degree, indicating slight to moderate contamination for most plants collected near the tannery.

  4. Uranium in spring water and bryophytes at basin creek in central idaho

    Science.gov (United States)

    Shacklette, H.T.; Erdman, J.A.

    1982-01-01

    Arkosic sandstones and conglomerates of Tertiary age beneath the Challis Volcanics of Eocene age at Basin Creek, 10 km northeast of Stanley, Idaho, contain uranium-bearing vitrainized carbon fragments. The economic potential of these sandstones and conglomerates is currently being assessed. Springs abound at the contacts of rock units, and water from these springs supports abundant growths of bryophytes (mosses and liverworts). Water from 22 springs and associated bryophytes were sampled; two springs were found to contain apparently anomalous concentrations (normalized) of uranium - as much as 6.5 ??g/L (ppb) in water and 1800 ??g/g (ppm) in ash of mosses. Moss samples from both springs also contained anomalous concentrations of arsenic, and one contained highly anomalous amounts of beryllium. Water from a third spring contained slightly anomalous amounts of uranium, and two species of mosses at the spring contained anomalous uranium (400 and 700 ??g/g) and high levels of both cadmium and lead. Water from a fourth spring was normal for uranium (0.18 ??g/L), but the moss from the water contained a moderate uranium level and highly anomalous concentrations of lead, germanium, and thallium. These results suggest that, in the Basin Creek area, moss sampling at springs may give a more reliable indication of uranium occurrence than would water sampling. The reason for this may be the ability of mosses to concentrate uranium and its associated pathfinder elements and to integrate uranium fluctuations that occur in the spring water over any period of time. ?? 1982.

  5. New Results of Angiosperm Bryophytes of Inner Mongolia in the Post-Bryophytes Time%内蒙古苔藓植物志后时期苔藓植物区系研究进展

    Institute of Scientific and Technical Information of China (English)

    赫智霞; 徐杰; 白学良; 田桂泉; 李琴琴

    2012-01-01

    本文综述了《内蒙古苔藓植物志》出版之后内蒙古苔藓植物区系研究的新成果.结果表明,在《内蒙古苔藓植物志》出版之后的十多年间,以白学良教授为领导的研究团队,对内蒙古地区苔藓植物的分布、种类多样性等方面进行了深入研究,特别是沙漠地区.在此期间,发现内蒙古苔藓植物新记录1纲;新记录科3科;新记录属16属;新记录种76种、订正种9种.内蒙古苔藓植物区系研究取得了显著成果,为《内蒙古苔藓植物志》的再版编著奠定了坚实的基础.%The paper has overviewed the research new result of angiosperm bryophytes of Inner Mongolian after the publishing edition of "bryophytes Intramongolica".The results indicate: after the "bryophytes Intramongolica " publish ten more years,under the leadership of the professor Bai Xueliang,distribution and species variety of the Inner Mongolia bryophytes go ahead intensive study,especially in desert area.During this time: 1 new record class,3 new record family;16 new record genus;76 new record species,9 revised species were found.In the post-flora time,the research on angiosperm flora of Inner Mongolia has achieved notable progress,which has provide a strong base of the second edition of " Flora Intramongolica ".

  6. Phytochemical screening and synergistic interactions between aminoglycosides, selected antibiotics and extracts from the bryophyte Octoblepharum albidum Hedw (Calymperaceae

    Directory of Open Access Journals (Sweden)

    Vidal C.A.S.

    2012-01-01

    Full Text Available This work is the first to describe the modulation of antibiotic activity of the bryophyte Octoblepharum albidum Hedw extract. The antibacterial activity of ethanolic extract of O. albidum (EEOa, alone and in association with aminoglycosides, was determined against six bacterial strains by a microdilution test. The results showed a similar inhibitory activity of EEOa against Escherichia coli ATCC 25922 and Klebsiella pneumoniae ATCC 33018 (MICs 512 μg/mL. The synergistic effect of the extracts and aminoglycosides was also verified. The most pronounced effects were obtained with EEOa + gentamicin against E. coli and EEOa + kanamycin against K. pneumoniae with MICs reduction (128 to 32 μg/mL. The data from this study are indicative of the antibacterial activity of the bryophyte O. albidum extracts and its potential in modifying the resistance of aminoglycosides analyzed.

  7. Characteristics of vascular and bryophyte flora in the landscape reserve «Grofa» (The Ukrainian Carpathians

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    I. S. Pozynych

    2010-09-01

    Full Text Available Information about the landscape reserve of statewide value «Grofa» is presented. The floristic composition of forest and meadow associations of the reserve has been investigated. Typical and rare species for these phytocenoses have been revealed. The rare species and plants from the Red Data Book have been described. As a results of our investigation 117 species (87 Bryophyta and 30 Marshantiophyta have been recorded. Species representation of bryophytes in widespread communities has been described.

  8. High potential for chemical weathering and climate effects of early lichens and bryophytes in the Late Ordovician

    Science.gov (United States)

    Porada, Philipp; Lenton, Tim; Pohl, Alexandre; Weber, Bettina; Mander, Luke; Donnadieu, Yannick; Beer, Christian; Pöschl, Ulrich; Kleidon, Axel

    2016-04-01

    Non-vascular vegetation in the Late Ordovician may have considerably increased global chemical weathering, thereby reducing atmospheric CO2 concentration and contributing to a decrease in global temperature and the onset of glaciations. Usually, enhancement of weathering by non-vascular vegetation is estimated using field experiments which are limited to small areas and a low number of species. This makes it difficult to extrapolate to the global scale and to climatic conditions of the past, which differ markedly from the recent climate. Here we present a global, spatially explicit modelling approach to estimate chemical weathering by non-vascular vegetation in the Late Ordovician. During this period, vegetation probably consisted of early forms of today's lichens and bryophytes. We simulate these organisms with a process-based model, which takes into account their physiological diversity by representing multiple species. The productivity of lichens and bryophytes is then related to chemical weathering of surface rocks. The rationale is that the organisms dissolve rocks to extract phosphorus for the production of new biomass. To account for the limited supply of unweathered rock material in shallow regions, we cap biotic weathering at the erosion rate. We estimate a potential global weathering flux of 10.2 km3 yr-1 of rock, which is around 12 times larger than today's global chemical weathering. The high weathering potential implies a considerable impact of lichens and bryophytes on atmospheric CO2 concentration in the Ordovician. Moreover, we find that biotic weathering is highly sensitive to atmospheric CO2, which suggests a strong feedback between chemical weathering by lichens and bryophytes and climate.

  9. Element accumulation in boreal bryophytes, lichens and vascular plants exposed to heavy metal and sulfur deposition in Finland.

    Science.gov (United States)

    Salemaa, Maija; Derome, John; Helmisaari, Heljä-Sisko; Nieminen, Tiina; Vanha-Majamaa, Ilkka

    2004-05-25

    Macronutrient (N, P, K, Mg, S, Ca), heavy metal (Fe, Zn, Mn, Cu, Ni, Cd, Pb) and Al concentrations in understorey bryophytes, lichens and vascular plant species growing in Scots pine forests at four distances from the Harjavalta Cu-Ni smelter (0.5, 2, 4 and 8 km) were compared to those at two background sites in Finland. The aim was to study the relationship between element accumulation and the distribution of the species along a pollution gradient. Elevated sulfur, nitrogen and heavy metal concentrations were found in all species groups near the pollution source. Macronutrient concentrations tended to decrease in the order: vascular plants>bryophytes>lichens, when all the species groups grew on the same plot. Heavy metal concentrations (except Mn) were the highest in bryophytes, followed by lichens, and were the lowest in vascular plants. In general, vascular plants, being capable of restricting the uptake of toxic elements, grew closer to the smelter than lichens, while bryophytes began to increase in the understorey vegetation at further distances from the smelter. A pioneer moss (Pohlia nutans) was an exception, because it accumulated considerably higher amounts of Cu and Ni than the other species and still survived close to the smelter. The abundance of most of the species decreased with increasing Cu and Ni concentrations in their tissues. Cetraria islandica, instead, showed a positive relationship between the abundance and Cu, Ni and S concentrations of the thallus. It is probable that, in addition to heavy metals, sporadically high SO(2) emissions have also affected the distribution of the plant species.

  10. Diversity and antagonistic potential of bacteria associated with bryophytes from nutrient-poor habitats of the Baltic Sea Coast.

    Science.gov (United States)

    Opelt, Katja; Berg, Gabriele

    2004-11-01

    Very little is known about the interaction of bryophytes with bacteria. Therefore, we analyzed bacteria associated with three bryophyte species, Tortula ruralis, Aulacomnium palustre, and Sphagnum rubellum, which represent typical moss species of three nutrient-poor plant communities at the southern Baltic Sea coast in Germany. By use of two cultivation-independent techniques, denaturing gradient gel electrophoresis and single-strand conformation polymorphism analysis of the 16S ribosomal DNA, a high degree of moss specificity was found for associated bacterial communities. This specificity could be further evidenced by a cultivation-dependent approach for the following parameters: (i) plate counts of bacteria on R2A medium, (ii) proportion of antagonistic isolates, (iii) antagonistic activity as well as spectrum against pathogens, and (iv) diversity and richness of antagonistic isolates. The proportion of isolates with antagonistic activity against the pathogenic model fungus Verticillium dahliae was highest for S. rubellum (31%), followed by A. palustre (17%) and T. ruralis (5%). A high percentage (99%) of moss-associated antagonistic bacteria produced antifungal compounds. The high recovery of antagonistic isolates strongly suggests that bryophytes represent an ecological niche which harbors a diverse and hitherto largely uncharacterized microbial population with yet unknown and untapped potential biotechnological applications, e.g., for biological control of plant pathogens.

  11. Diversity and distribution of the bryophyte flora in montane forests in the Chapada Diamantina region of Brazil

    Directory of Open Access Journals (Sweden)

    Emilia de Brito Valente

    2013-09-01

    Full Text Available Bryophytes constitute an important component of tropical rain forests, which provide microhabitats favorable for their establishment. Bryophytes are also quite responsive to changes in microclimate, which makes them good bioindicators. This study aimed to determine the diversity and distribution of bryophytes in upper and lower montane forests of the Chapada Diamantina region of the state of Bahia, Brazil. To that end, we studied community aspects such as richness, diversity, substrates colonized, life forms and floristic similarity between areas and regions. In 2007 and 2008, we collected specimens from six forest sites, located from the north to the south of the Chapada Diamantina region. We identified a total of 205 infrageneric taxa. In comparison with the lower montane forests, the upper montane forests presented higher diversity and species richness, as well as greater numbers of substrates colonized, life form types, species of restricted geographic distribution and species typical of shaded areas. We also found low similarity in the species composition, the populations of the upper and lower montane forests forming two large and distinct groups. Although presenting relatively high floristic homogeneity among themselves, the Chapada Diamantina areas presented little similarity with those of the Atlantic Forest. This can be explained by the differences between the two regions in terms of environmental conditions, precipitation, seasonality, elevation and continentality.

  12. Physiological Responses of Two Epiphytic Bryophytes to Nitrogen, Phosphorus and Sulfur Addition in a Subtropical Montane Cloud Forest

    Science.gov (United States)

    Chen, Xi; Liu, Wen-yao; Song, Liang; Li, Su; Wu, Yi; Shi, Xian-meng; Huang, Jun-biao; Wu, Chuan-sheng

    2016-01-01

    Atmospheric depositions pose significant threats to biodiversity and ecosystem function. However, the underlying physiological mechanisms are not well understood, and few studies have considered the combined effects and interactions of multiple pollutants. This in situ study explored the physiological responses of two epiphytic bryophytes to combined addition of nitrogen, phosphorus and sulfur. We investigated the electrical conductivity (EC), total chlorophyll concentration (Chl), nutrient stoichiometry and chlorophyll fluorescence signals in a subtropical montane cloud forest in south-west China. The results showed that enhanced fertilizer additions imposed detrimental effects on bryophytes, and the combined enrichment of simulated fertilization exerted limited synergistic effects in their natural environments. On the whole, EC, Chl, the effective quantum yield of photosystem II (ΦPSII) and photochemical quenching (qP) were the more reliable indicators of increased artificial fertilization. However, conclusions on nutrient stoichiometry should be drawn cautiously concerning the saturation uptake and nutrient interactions in bryophytes. Finally, we discuss the limitations of prevailing fertilization experiments and emphasize the importance of long-term data available for future investigations. PMID:27560190

  13. Investigating the impact of light and water status on the exchange of COS, 13CO2, CO18O and H218O from bryophytes

    Science.gov (United States)

    Gimeno, Teresa; Royles, Jessica; Ogee, Jerome; Jones, Samuel; Burlett, Regis; West, Jason; Sauze, Joana; Wohl, Steven; Genty, Bernard; Griffiths, Howard; Wingate, Lisa

    2016-04-01

    Terrestrial surfaces are often covered by photoautotrophic communities that play a significant role in the biological fixation of C and N at the global scale. Bryophytes (mosses, liverworts and hornworts) are key members in these communities and are especially adapted to thrive in hostile environments, by growing slowly and surviving repeated dehydration events. Consequently, bryophyte communities can be extremely long-lived (>1500yrs) and can serve as valuable records of historic climate change. In particular the carbon and oxygen isotope compositions of mosses can be used as powerful proxies describing how growing season changes in atmospheric CO2 and rainfall have changed in the distant past over the land surface. Interpreting the climate signals of bryophyte biomass requires a robust understanding of how changes in photosynthetic activity and moisture status regulate the growth and isotopic composition of bryophyte biomass. Thus theoretical models predicting how changes in isotopic enrichment and CO2 discrimination respond to dehydration and rehydration are used to tease apart climatic and isotopic source signals. Testing these models with high resolution datasets obtained from new generation laser spectrometers can provide more information on how these plants that lack stomata cope with water loss. In addition novel tracers such as carbonyl sulfide (COS) can also be measured at high resolution and precision (rates were low. As the water film on the bryophyte disappeared the net rates of CO2 and COS uptake increased to a steady maximum rate whilst relative water content values remained above 100%. Thereafter, the bryophyte turned from a COS sink to a source. In this talk we will further explore how the COS exchange rate of bryophytes varies with light level and whether there is any evidence for differences in the activity of the enzyme carbonic anhydrase with light and moisture status. We also use the data to develop and test a new theoretical model of COS

  14. Rare Carboniferous and Permian glacial and non-glacial bryophytes and associated lycophyte megaspores of the Paraná Basin, Brazil: A new occurrence and paleoenvironmental considerations

    Science.gov (United States)

    Ricardi-Branco, Fresia; Rohn, Rosemarie; Longhim, Marcia Emilia; Costa, Juliana Sampaio; Martine, Ariel Milani; Christiano-de-Souza, Isabel Cortez

    2016-12-01

    Fossil bryophytes are rare because their preservation is compromised by the presence of a thin cuticle (if any) and a lack of lignin. Except for the occurrence of one bryophyte in the glacial Dwyka Group of the Karoo Basin, the other rare Late Paleozoic records in Gondwana are notably from the Paraná Basin in Southeast/South Brazil. Four bryophyte sites (including a newly discovered one) were found in the lower part of the thick Permo-Carboniferous glacial succession of the Itararé Group, and one was found in the Guadalupian Teresina Formation, which was roughly assigned to an epeiric sea (or "lake") dominated by a warm, semi-arid climate. This study describes the fossils from the new occurrence from the Itararé Group and discusses the context in which the bryophyte beds originated in the basin. The new samples confirm that all of the bryophytes of the Itararé Group can be classified as Dwykea araroii Ricardi-Branco et al. (a possible pleurocarp) and are associated with the lycophyte megaspore Sublagenicula brasiliensis (Dijkstra) Dybová-Jachowicz. In the much younger Teresina Formation, the bryophytes are Yguajemanus yucapirus Cristiano-de-Souza et al. and Capimirinus riopretensis Cristiano-de-Souza et al., and abundant charophytes and rare dwarf lycophyte stems and bracts are present in the same layers. Although the two stratigraphic units represent distinct paleoenvironments and climates, they seem to share some characteristics: a) the bryophyte assemblages were transported very little; b) they were deposited in very calm environments; c) they were the main components (along with some lycophytes) of local or poorly diversified regional vegetation. The low number of species, which is characteristic of opportunistic communities, can be explained by local or regional conditions that would have been stressful for the vascular plants in other areas. During the deposition of the Itararé Group, the main control was probably the cold climate in addition to a

  15. Do Species-specific Hydraulic Traits Predict Ecosystem Response and Community Structure? Evidence From Co-occurring Bryophytes of a Sloping Wetland

    Science.gov (United States)

    Lintz, H. E.; Russell, M. C.; Hardman, A. C.

    2007-12-01

    Ecosystems comprise a complex assortment species, and each species has a unique set of physiological and anatomical characteristics or traits. Landscape-level forecasts of ecosystem response to climate change can benefit by accounting for species-specific traits. Here, we demonstrate how a hydraulic trait can be quantified and aggregrated to community and ecosystem levels using a model life form and system, bryophytes in a sloping wetland. Growth and reproduction of bryophytes depend on the quantity of external water held, which varies by species. Wetlands provide a soil substrate that supplies either an unlimited amount of water, or at minimum, a shallow water table for part of the year. We hypothesized and confirmed that external water holding capacity of bryophyte species (measured in the laboratory) corresponded to bryophyte community structure along a hydrology gradient in the wetland. In addition, we demonstrated that water holding capacity by species can be aggregated to the level of the wetland ecosystem to reveal an emergent community property, water holding capacity of the bryophyte mat. Our results support ecological theory presented by Paul Keddy (1999) that co-occurring organisms show similarity in resource acquisition along gradients of resource limitation. We promote a conceptual framework that incorporates species-specific traits as modeling currency that can bridge scales.

  16. A Preliminary Study on Resource and Efficacy of Medicinal Bryophytes in Guiy- ang%贵阳市药用苔藓植物资源及药效调查

    Institute of Scientific and Technical Information of China (English)

    韩敏敏; 熊源新; 杨冰; 杨林

    2012-01-01

    对责阳市药用苔藓植物资源的种类与主要药用功效进行研究,据统计,贵阳市药用苔藓共有36种,隶属于21科28属。并且提供了该地区药用苔藓的药效。为进一步开发贵阳市苔藓植物资源和中草药资源提供新的资料。%The study is about resource and efficacy and medicinal function of medicinal bryophytes in Guiyang city, It is about medicinal function of each bryophyte. There are 36 species medicinal bryophytes, belonging to 28 genera of 21 families. The efficacy of medicinal bryophytes is provided. New data are afforded to further develop medicinal bryophytes resource of Guiyang.

  17. Epiphytic bryophytes of Quercus forests in Central and North inland Iberian Peninsula

    Directory of Open Access Journals (Sweden)

    Nagore García Medina

    2015-04-01

    Full Text Available Diversity patterns are governed by a complex network of interacting factors. Studies directed to disentangle the most important factors affecting diversity have frequently shown divergent results, which has encouraged a rewarding debate about the relative importance of each factor. Scale dependency has been identified as a direct cause of at least part of such divergences. However, studies with spatially-explicit measurements at different scales are costly and therefore they are relatively scarce despite their importance. Here, we present a database to disentangle the cross-scale variation in the importance of factors affecting the diversity of epiphytic bryophyte communities in Quercus dominated forests (Quercus ilex L., Quercus pyrenaica Willd. and Quercus faginea Lam. in the North-western region of the Iberian Peninsula. We provide species-per-site abundance information with more than 9000 entries and an environmental table containing 20 in situ measured variables at three different scales (forest, stand, and sample. The database will help to advance the research of cross-scale effects of diversity patterns while at the same time providing valuable information on the distribution of a poorly known group of organisms. 

  18. [Effects of enhanced UV-B radiation on the growth of five bryophytes in Changbai Mountains].

    Science.gov (United States)

    Wu, Yu-Huan; Gu, Yan-Hong; Liu, Peng; Zoltán, Tuba

    2007-09-01

    Five bryophytes (Rhytidium rugosum, Rhytidiadelphus triquetrus, Hylocomium splendens, Hylocomium pyrenaicum, and Polytrichum alpinum) were exposed to 0.2 kJ x m(-2) x d(-1) (visible light under native condition, CK), 3.0 kJ x m(-2) x d(-1) (simulated dose of UV-B irradiance at the tundra in Changbai Mountains, medium dose of UV-B irradiance, T1), and 6.0 kJ x m(-2) x d(-1) (high dose of UV-B irradiance, T2) to investigate the effects of enhanced UV-B radiation on plant height, biomass, and chlorophyll content. The results indicated that medium and high UV-B radiations decreased the plant height, biomass, and chlorophyll content of R. triquetrus and H. splendens by 32.3%, 62.4%, and 81.3%, and 21.4%, 59.4%, and 62.8%, respectively, and the relative growth rates were negative. Enhanced UV-B radiations had less effect on P. alpinum chlorophyll content but doubled its below-ground biomass, and slightly increased the biomass of R. rugosum. P. alpinum and R. rugosum had higher tolerance against UV-B radiation, while R. triquetrus and H. splendens were more sensitive to UV-B radiation.

  19. Using transplants to measure accumulation rates of epiphytic bryophytes in forests of western Oregon

    Science.gov (United States)

    Rosso, A.L.; Muir, Patricia S.; Rambo, T.

    2001-01-01

    We sought a simple and effective transplant method that could be used to measure biomass accumulation rates of epiphytic bryophytes. Trials were carried out in the Pseudotsuga menziesii-dominated forests of western Oregon. We tested multiple transplant methods over a 13-month period while comparing accumulation rates of Antitrichia curtipendula (Hedw.) Brid. and Isothecium myosuroides Brid. among an old-growth stand, a young stand, and a recent clearcut. In our study area, Antitrichia is considered to be an old-growth associate while Isothecium is a more ubiquitous species. Methods tested included containment in net bags, containment in hairnets, and directly tying mats to substrates. Three sizes of transplants were tested with both natural and inert artificial substrates. Transplants of approximately five g enclosed in plastic net bags and tied to either natural or artificial substrates worked well for our purposes. Only minor differences were found in mean accumulation rates between the old growth and young stand, though variation in accumulation rates was higher in the old growth. Neither species appeared capable of surviving in the clearcut. Antitrichia accumulated biomass 60% faster in the canopy than in the understory on average. Antitrichia also accumulated at a faster rate than Isothecium, with mean 13-month biomass increases of 11.8 and 3.7% respectively for 5 g transplants in the understory. Our results suggest that Antitrichia's association with old growth may be due more to dispersal or establishment limitations than to a decreased ability to grow in young stands.

  20. Comparing copper resistance in two bryophytes: Mielichhoferia elongata Hornsch. versus Physcomitrella patens Hedw.

    Science.gov (United States)

    Sassmann, Stefan; Wernitznig, Stefan; Lichtscheidl, Irene K; Lang, Ingeborg

    2010-10-01

    The bryophyte Mielichhoferia elongata is known to occur on copper-rich substrate, but the exact resistance level remained to be determined by in vitro experiments. Here, we tested its copper tolerance in graded copper solutions and compared the results to the moss Physcomitrella patens that is not known to inhabit heavy metal sites. Our results confirm the survival of M. elongata in classical resistance experiments of up to 10 mM Cu-ethylenediaminetetraacetic acid (EDTA) solution. Interestingly, P. patens is equally resistant. Cultured on copper-enriched agar plates for over 5 weeks, P. patens survived even higher copper levels of up to 100 mM Cu-EDTA and an increment of growth was detected on all concentrations tested. Obviously, P. patens is able to withstand harmfully high levels of copper in both solution and substrate. In this short communication, we give a detailed description of the growth rates and discuss the results in comparison to other moss species and heavy metals.

  1. The mossy north: an inverse latitudinal diversity gradient in European bryophytes

    Science.gov (United States)

    Mateo, Rubén G.; Broennimann, Olivier; Normand, Signe; Petitpierre, Blaise; Araújo, Miguel B.; Svenning, Jens-C.; Baselga, Andrés; Fernández-González, Federico; Gómez-Rubio, Virgilio; Muñoz, Jesús; Suarez, Guillermo M.; Luoto, Miska; Guisan, Antoine; Vanderpoorten, Alain

    2016-05-01

    It remains hotly debated whether latitudinal diversity gradients are common across taxonomic groups and whether a single mechanism can explain such gradients. Investigating species richness (SR) patterns of European land plants, we determine whether SR increases with decreasing latitude, as predicted by theory, and whether the assembly mechanisms differ among taxonomic groups. SR increases towards the south in spermatophytes, but towards the north in ferns and bryophytes. SR patterns in spermatophytes are consistent with their patterns of beta diversity, with high levels of nestedness and turnover in the north and in the south, respectively, indicating species exclusion towards the north and increased opportunities for speciation in the south. Liverworts exhibit the highest levels of nestedness, suggesting that they represent the most sensitive group to the impact of past climate change. Nevertheless, although the extent of liverwort species turnover in the south is substantially and significantly lower than in spermatophytes, liverworts share with the latter a higher nestedness in the north and a higher turn-over in the south, in contrast to mosses and ferns. The extent to which the similarity in the patterns displayed by spermatophytes and liverworts reflects a similar assembly mechanism remains, however, to be demonstrated.

  2. Horizontal transfer of an adaptive chimeric photoreceptor from bryophytes to ferns.

    Science.gov (United States)

    Li, Fay-Wei; Villarreal, Juan Carlos; Kelly, Steven; Rothfels, Carl J; Melkonian, Michael; Frangedakis, Eftychios; Ruhsam, Markus; Sigel, Erin M; Der, Joshua P; Pittermann, Jarmila; Burge, Dylan O; Pokorny, Lisa; Larsson, Anders; Chen, Tao; Weststrand, Stina; Thomas, Philip; Carpenter, Eric; Zhang, Yong; Tian, Zhijian; Chen, Li; Yan, Zhixiang; Zhu, Ying; Sun, Xiao; Wang, Jun; Stevenson, Dennis W; Crandall-Stotler, Barbara J; Shaw, A Jonathan; Deyholos, Michael K; Soltis, Douglas E; Graham, Sean W; Windham, Michael D; Langdale, Jane A; Wong, Gane Ka-Shu; Mathews, Sarah; Pryer, Kathleen M

    2014-05-06

    Ferns are well known for their shade-dwelling habits. Their ability to thrive under low-light conditions has been linked to the evolution of a novel chimeric photoreceptor--neochrome--that fuses red-sensing phytochrome and blue-sensing phototropin modules into a single gene, thereby optimizing phototropic responses. Despite being implicated in facilitating the diversification of modern ferns, the origin of neochrome has remained a mystery. We present evidence for neochrome in hornworts (a bryophyte lineage) and demonstrate that ferns acquired neochrome from hornworts via horizontal gene transfer (HGT). Fern neochromes are nested within hornwort neochromes in our large-scale phylogenetic reconstructions of phototropin and phytochrome gene families. Divergence date estimates further support the HGT hypothesis, with fern and hornwort neochromes diverging 179 Mya, long after the split between the two plant lineages (at least 400 Mya). By analyzing the draft genome of the hornwort Anthoceros punctatus, we also discovered a previously unidentified phototropin gene that likely represents the ancestral lineage of the neochrome phototropin module. Thus, a neochrome originating in hornworts was transferred horizontally to ferns, where it may have played a significant role in the diversification of modern ferns.

  3. Methylobacteria isolated from bryophytes and the 2-fold description of the same microbial species.

    Science.gov (United States)

    Schauer, S; Kutschera, U

    2013-02-01

    On the surface of healthy land plants (embryophytes), numerous non-pathogenic bacteria have been discovered and described. Among these epiphytic microbes, pink-pigmented facultative methylotrophic microbes of the genus Methylobacterium are of special significance, because these microorganisms consume methanol emitted via the stomatal pores and secrete growth-promoting phytohormones. Methylobacterium funariae, Schauer and Kutschera 2011, a species isolated in our lab from the common cord moss, described as a nova species in this journal, was recently characterized for a second time as a "new taxon" under a different name, "M. bullatum." Based on a phylogenetic analysis, we show that these taxa are identical. In addition, we provide novel information on the exact cell size, and describe the correct type locality of this bacterial species, which was classified as a phytosymbiont. Finally, we discuss the hypothesis that certain methylobacteria may preferentially colonize bryophytes. With reference to our recent discovery that thalli of ferns form, like liverworts and moss protonemata, associations with methylobacteria, we argue that the haploid phase of cryptogames are preferred host organisms of these pink-pigmented microbial phytosymbionts.

  4. Performance of forest bryophytes with different geographical distributions transplanted across a topographically heterogeneous landscape.

    Science.gov (United States)

    Dahlberg, C Johan; Ehrlén, Johan; Hylander, Kristoffer

    2014-01-01

    Most species distribution models assume a close link between climatic conditions and species distributions. Yet, we know little about the link between species' geographical distributions and the sensitivity of performance to local environmental factors. We studied the performance of three bryophyte species transplanted at south- and north-facing slopes in a boreal forest landscape in Sweden. At the same sites, we measured both air and ground temperature. We hypothesized that the two southerly distributed species Eurhynchium angustirete and Herzogiella seligeri perform better on south-facing slopes and in warm conditions, and that the northerly distributed species Barbilophozia lycopodioides perform better on north-facing slopes and in relatively cool conditions. The northern, but not the two southern species, showed the predicted relationship with slope aspect. However, the performance of one of the two southern species was still enhanced by warm temperatures. An important reason for the inconsistent results can be that microclimatic gradients across landscapes are complex and influenced by many climate-forcing factors. Therefore, comparing only north- and south-facing slopes might not capture the complexity of microclimatic gradients. Population growth rates and potential distributions are the integrated results of all vital rates. Still, the study of selected vital rates constitutes an important first step to understand the relationship between population growth rates and geographical distributions and is essential to better predict how climate change influences species distributions.

  5. 苔藓植物生态学研究的数量分析方法%On The Methods of Quantitative Analysis for Ecological Research of Bryophyte

    Institute of Scientific and Technical Information of China (English)

    张元明; 郭水良; 曹同; 潘伯荣

    2001-01-01

    植被数量分析方法在苔藓植被中的应用起步较晚,仅有20多年的研究历史,但发展却十分迅速。这里介绍了目前苔藓植物生态学研究中应用较为普遍的数量分析方法,并探讨了各自的优缺点。%The method of quantitative analysis applied in research of bryophyte ecology becomes increasingly prevailing nowadays, though it used in bryophyte only 20 years long. The present paper mainly deals with those methods, which are applied rather commonly in the research of bryophyte ecology.

  6. The influence of nitrogen in stemflow and precipitation on epiphytic bryophytes, Isothecium myosuroides Brid., Dicranum scoparium Hewd. and Thuidium tamariscinum (Hewd.) Schimp of Atlantic oakwoods.

    Science.gov (United States)

    Leith, I D; Mitchell, R J; Truscott, A-M; Cape, J N; van Dijk, N; Smith, R I; Fowler, D; Sutton, M A

    2008-09-01

    The spatial relationship between the concentration and deposition of the major ions in precipitation and stemflow and their influence on the tissue nitrogen concentration of three epiphytic bryophytes on Quercus petraea (Matt) Liebl. and Q. robur L. was investigated at seven UK Atlantic oak woodland sites with a range of total N deposition of 55-250 mmol m(-2). The main driver of change in tissue N concentrations of three epiphytic bryophytes (Isothecium myosuroides Brid. (Eurhynchium myosuroides (Brid.) Schp.), Dicranum scoparium Hewd. and Thuidium tamariscinum (Hewd.) Schimp.) was total N deposition in stemflow, dominated by ammonium deposition. The three epiphytic species also showed strong relationships between tissue N concentration and total N deposition in rainfall but a poor correlation with total N ion concentration in rainfall. This study shows that epiphytic bryophytes utilise stemflow N and thus increase their risk from inputs of total N deposition compared to terricolous species at the same site.

  7. Establishing a minimum postmortem interval of human remains in an advanced state of skeletonization using the growth rate of bryophytes and plant roots.

    Science.gov (United States)

    Cardoso, H F V; Santos, A; Dias, R; Garcia, C; Pinto, M; Sérgio, C; Magalhães, T

    2010-09-01

    This paper illustrates the usefulness and efficiency of botanical evidence in establishing a minimum postmortem interval (PMI). The case under analysis refers to the remains of an adult male in an advanced state of skeletonization recovered from a wooded area in northern Portugal. The skeleton showed several taphonomical changes, which included the presence of green algae, bryophytes, and growing shrub roots in, around, and through the remains. By determining the age of both the bryophytes and shrub roots, it was concluded that the minimum amount of time elapsed since death was 3 years, to which several months or a few years have to be added to account for the complete decomposition of the remains. The disappearance of the presumptive individual had occurred 6 years before and is fully consistent with the estimate of the PMI. This report illustrates a novel use of bryophytes in a forensic setting.

  8. 苔藓植物对酸性恶劣土壤环境的适应性研究%Adaptability of Bryophytes to Acidic Soil Environment

    Institute of Scientific and Technical Information of China (English)

    张啸天

    2016-01-01

    苔藓植物结构简单,对土壤环境的变化反应敏感,是良好的生物指示植物。该研究通过室内模拟实验的方法,分析苔藓植物对富含酸的恶劣土壤环境的适应性。结果表明,苔藓植物对酸性恶劣土壤环境的适应性较差,但苔藓植物具有一定改善生存环境基质的能力,因而能作为恶劣土壤环境下的植物物种先锋,以帮助其它物种的安全进入。同时对本地区苔藓植物的多样性保护以及合理利用苔藓植物进行酸性环境污染监测有一定理论和实践价值。%Bryophytes are simple in organic structures and sensitive to changes of soil environment so they can be used as excellent bioindicators.Conducting simulation experiment indoors,this study analyzes the adaptive ability of bryophytes to the soil environment rich in acid.The result shows that bryophytes have poor adaptive ability to undesir⁃able acidic soil environment,but they are capable of improving poor soil environment.Therefore,it is possible to plant bryophytes as the initiatives in undesirable soil for other plants settling in.This study has theoretical and practi⁃cal values in multidimensional protection of local bryophytes and making good use of bryophytes to monitor acidic en⁃vironment pollution.

  9. Effect of forest clear-cutting on subtropical bryophyte communities in waterfalls, on dripping walls, and along streams.

    Science.gov (United States)

    Patiño, Jairo; Hylander, Kristoffer; González-Mancebo, Juana M

    2010-09-01

    Forested freshwater ecosystems worldwide are threatened by a number of anthropogenic disturbances, such as water pollution and canalization. Transient or permanent deforestation can also be a serious threat to organisms in forested watersheds, but its effects on different types of freshwater systems has been little studied. We investigated lotic bryophyte communities on rock and soil in subtropical cloud laurel forests on La Gomera Island in the Canary Islands, Spain, and asked whether the response to forest clear-cutting varied among the communities associated with dripping walls, streams, and waterfalls. We compared three successional forest stages: ancient forests (> 250 years), young forests (20-50 years after clear-cutting), and open stands (5-15 years after clear-cutting). In each of 56 study sites we sampled general vegetation and substrate data in a 0.01-ha plot and took composition data of bryophyte species in 3 + 3 subplots of 1 x 1 m. The general pattern of decline in species richness and change in species composition after forest clear-cutting was stronger for streamside assemblages compared to assemblages on dripping walls and in waterfalls. The change in species numbers on rocks was larger than that on soils, because a guild of species growing on soil (but not on rocks) were favored by disturbance and thus increased in the disturbed sites. Most of the sensitive species could be classified as typical laurel forest species. Mosses were generally more tolerant to forest clear-cutting than were liverworts. We suggest that streamsides are more sensitive to disturbance than waterfalls and dripping walls because of a larger variation in microclimate before than after clear-cutting and because they are more easily invaded by early-successional species (both bryophytes and highly competitive vascular plants). We propose that special care should be taken along small streams within disturbed watersheds if bryophyte assemblages and threatened species should be

  10. Bryophytes and lichens in peatlands and Tepualia stipularis swamp forests of Isla Grande de Chiloé (Chile

    Directory of Open Access Journals (Sweden)

    León, Carolina A.

    2014-06-01

    Full Text Available One hundred and twenty-nine taxa of bryophytes and lichens were found in peatlands (Sphagnum bogs and swamp forests of Tepualia stipularis of Isla Grande de Chiloé (Chile (41°-43°S, 73°-74°W. Forty eight percent of these species are endemic to southern South America. The range of most species spans from Los Rios Region to Magallanes Region. Fifty mosses, 52 liverworts, and 27 macrolichens were reported. Global and national distributions and habitat preferences are given for each species.

  11. Concepts of fen and bog re-examined in relation to bryophyte cover and the acidity of surface waters

    Directory of Open Access Journals (Sweden)

    Eville Gorham

    2014-01-01

    Full Text Available Studies of surface-water pH and bryophyte assemblages in 440 plots from five peatland regions across northern North America reveal a very distinct, two-fold division into fens with a pH mode at 6.76-7.00, in which Amblystegiaceae are prominent, and bogs with a pH mode at 4.01-4.25, in which Sphagnaceae are dominant. The relevance of the data to past and current views on peatland classification is explored.

  12. Bryophytes as Climate Indicators: moss and liverwort photosynthetic limitations and carbon isotope signals in organic material and peat deposits

    Science.gov (United States)

    Griffiths, H.; Royles, J.; Horwath, A.; Hodell, D. A.; Convey, P.; Hodgson, D.; Wingate, L.; Ogeé, J.

    2011-12-01

    Bryophytes make a significant contribution to carbon sequestration and storage in polar, boreal, temperate and tropical biomes, and yet there is limited understanding of the determinants of carbon isotope composition. Bryophytes are poikilohydric and lack stomata in the vegetative (gametophyte) stage, and lack of roots and reliance on liquid water to maintain hydration status also imposes diffusional limitations on CO2 uptake and extent of carbon isotope discrimination. Real-time gas exchange and instantaneous discrimination studies can be used to quantify responses to liquid phase limitation. Thus, wetted tissues show less negative δ13C signals due to liquid phase conductance and, as the thallus surface dries, maximum CO2 assimilation and discrimination are attained when the limitation is primarily the internal (mesophyll) conductance. Continued desiccation then leads to additional biochemical limitation in drought tolerant species, and low discrimination, although the carbon gain is low at this time. In this paper we explore the extent of carbon isotope discrimination in bulk organic material and cellulose as a function of climatic and environmental conditions, in temperate, tropical and Antarctic bryophytes. Field studies have been used to investigate seasonal variations in precipitation and water vapour inputs for cloud forest formations as a function of bryophyte biomass, diversity and isotope composition in epiphytes (particularly leafy liverworts) along an altitudinal gradient in Peru. In the Antarctic, moss banks sampled on Signy Island consisted of only two species, primarily Chorisodontium aciphyllum and some Polytrichum strictum, allowing the collection of shallow and deep cores representative of growth over the past 200 to 2000 years. The well-preserved peat has provided data on growth (14C) and stable isotopic proxies (13C, 18O) for material contemporary with recent anthropogenic climate forcing (over the past 200 years), for comparison with longer

  13. Direct and interaction-mediated effects of environmental changes on peatland bryophytes.

    Science.gov (United States)

    Bu, Zhao-Jun; Rydin, Håkan; Chen, Xu

    2011-06-01

    Ecosystem processes of northern peatlands are largely governed by the vitality and species composition in the bryophyte layer, and may be affected by global warming and eutrophication. In a factorial experiment in northeast China, we tested the effects of raised levels of nitrogen (0, 1 and 2 g m(-2) year(-1)), phosphorus (0, 0.1 and 0.2 g m(-2) year(-1)) and temperature (ambient and +3°C) on Polytrichum strictum, Sphagnum magellanicum and S. palustre, to see if the effects could be altered by inter-specific interactions. In all species, growth declined with nitrogen addition and increased with phosphorus addition, but only P. strictum responded to raised temperature with increased production of side-shoots (branching). In Sphagnum, growth and branching changed in the same direction, but in Polytrichum, the two responses were uncoupled: with nitrogen addition there was a decrease in growth (smaller than in Sphagnum) but an increase in branching; with phosphorus addition growth increased but branching was unaffected. There were no two-way interactions among the P, N and T treatments. With increasing temperature, our results indicate that S. palustre should decrease relative to P. strictum (Polytrichum increased its branching and had a negative neighbor effect on S. palustre). With a slight increase in phosphorus availability, the increase in length growth and production of side-shoots in P. strictum and S. magellanicum may give them a competitive superiority over S. palustre. The negative response in Sphagnum to nitrogen could favor the expansion of vascular plants, but P. strictum may endure thanks to its increased branching.

  14. Methylobacterium haplocladii sp. nov. and Methylobacterium brachythecii sp. nov., isolated from bryophytes.

    Science.gov (United States)

    Tani, Akio; Sahin, Nurettin

    2013-09-01

    Pink-pigmented, facultatively methylotrophic bacteria, strains 87e(T) and 99b(T), were isolated from the bryophytes Haplocladium microphyllum and Brachythecium plumosum, respectively. The cells of both strains were Gram-reaction-negative, motile, non-spore-forming rods. On the basis of 16S rRNA gene sequence similarity, strains 87e(T) and 99b(T) were found to be related to Methylobacterium organophilum ATCC 27886(T) (97.1% and 97.7%, respectively). Strains 87e(T) and 99b(T) showed highest 16S rRNA gene similarity to Methylobacterium gnaphalii 23e(T) (98.3 and 99.0%, respectively). The phylogenetic similarities to all other species of the genus Methylobacterium with validly published names were less than 97%. Major cellular fatty acids of both strains were C(18:1)ω7c and C(18:0). The results of DNA-DNA hybridization, phylogenetic analyses based on 16S rRNA and cpn60 gene sequences, fatty acid profiles, whole-cell matrix-assisted, laser-desorption/ionization time-of-flight mass spectrometry (MALDI-TOF/MS) analysis, and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strains 87e(T) and 99b(T) from their phylogenetically closest relatives. We propose that strains 87e(T) and 99b(T) represent novel species within the genus Methylobacterium, for which the names Methylobacterium haplocladii sp. nov. (type strain 87e(T) =DSM 24195(T) =NBRC 107714(T)) and Methylobacterium brachythecii sp. nov. (type strain 99b(T) =DSM 24105(T) =NBRC 107710(T)) are proposed.

  15. Bioaccumulation of Selenium by the Bryophyte Hygrohypnum ochraceum in the Fountain Creek Watershed, Colorado

    Science.gov (United States)

    Herrmann, S. J.; Turner, J. A.; Carsella, J. S.; Lehmpuhl, D. W.; Nimmo, D. R.

    2012-12-01

    Aquatic bryophytes, Hygrohypnum ochraceum, were deployed "in situ" at 14 sites in the Fountain Creek Watershed, spring and fall, 2007 to study selenium (Se) accumulation. Dissolved, total, and pore (sediment derived) water samples were collected and water quality parameters determined while plants were exposed to the water for 10 days. There was a trend showing plant tissue-Se uptake with distance downstream and we found a strong correlation between Se in the water with total hardness in both seasons. There was a modest association between Se-uptake in plants with hardness in the spring of 2007 but not the fall. Plants bioconcentrated Se from the water by a factor of 5.8 × 103 at Green Mountain Falls and 1.5 × 104 at Manitou Springs in the fall of 2007. Both are examples of the bioconcentration abilities of the plants, primarily in the upper reaches of the watershed where bioconcentration factors were highest. However, the mean minima and maxima of Se in the plants in each of the three watershed segments appeared similar during both seasons. We found direct relationships between the pore and dissolved Se in water in the spring ( R 2 = 0.84) and fall ( R 2 = 0.95) and dissolved Se and total hardness in the spring and fall ( R 2 = 0.92). The data indicate that H. ochraceum was a suitable indicator of Se bioavailability and Se uptake in other trophic levels in the Fountain Creek Watershed based on a subsequent study of Se accumulation in fish tissues at all 14 sites.

  16. Biogeochemical characterization of an undisturbed highly acidic, metal-rich bryophyte habitat, east-central Alaska, U.S.A.

    Science.gov (United States)

    Gough, L.P.; Eppinger, R.G.; Briggs, P.H.; Giles, S.

    2006-01-01

    We report on the geochemistry of soil and bryophyte-laden sediment and on the biogeochemistry of willows growing in an undisturbed volcanogenic massive sulfide deposit in the Alaska Range ecoregion of east-central Alaska. We also describe an unusual bryophyte assemblage found growing in the acidic metal-rich waters that drain the area. Ferricrete-cemented silty alluvial sediments within seeps and streams are covered with the liverwort Gymnocolea inflata whereas the mosses Polytrichum commune and P. juniperinum inhabit the area adjacent to the water and within the splash zone. Both the liverwort-encrusted sediment and Polytrichum thalli have high concentrations of major and trace metal cations (e.g., Al, As, Cu, Fe, Hg, La, Mn, Pb, and Zn). Soils in the area do not reflect the geochemical signature of the mineral deposit and we postulate they are influenced by the chemistry of eolian sediments derived from outside the deposit area. The willow, Salix pulchra, growing mostly within and adjacent to the larger streams, has much higher concentrations of Al, As, Cd, Cr, Fe, La, Pb, and Zn when compared to the same species collected in non-mineralized areas of Alaska. The Cd levels are especially high and are shown to exceed, by an order of magnitude, levels demonstrated to be toxic to ptarmigan in Colorado. Willow, growing in this naturally occurring metal-rich Red Mountain alteration zone, may adversely affect the health of browsing animals. ?? 2006 Regents of the University of Colorado.

  17. Bryophytes in fragments of Terra Firme forest on the great curve of the Xingu River, Pará state, Brazil.

    Science.gov (United States)

    Pantoja, A C C; Ilkiu-Borges, A L; Tavares-Martins, A C C; Garcia, E T

    2015-08-01

    Microclimatic conditions of tropical forest favour the high richness of bryophytes, which by being sensitive to environmental changes, are important indicators of habitat conditions. The aim of this study was to determine the richness and species composition of the bryophyte flora in fragments of terra firme forest on the great curve of the Xingu River, Pará state, Brazil. The collections were made in August and September 2012 in 14 fragments, in which were installed two plots per fragment, one at the edge and one inside, measuring 10 × 10 m each. The results showed 77 species in 45 genera and 18 families. Lejeunea setiloba Spruce and Marchesinia brachiata (Sw.) Schiffn. are new records for Pará state. The richness families in this study were the ones typically found in tropical forest surveys. A high richness of rare species in comparison to common ones, a pattern usually observed for plants in tropical forests was not reported in this study, probably due to historical fragmentation and disturbance in the area. The richness and species composition were determined mainly by the physiognomic characteristics of the studied forest fragments.

  18. Bryophyte communities of restingas in Northeastern Brazil and their similarity to those of other restingas in the country

    Directory of Open Access Journals (Sweden)

    Mércia Patrícia Pereira Silva

    2016-01-01

    Full Text Available ABSTRACT Restingas are a coastal component of the Atlantic Forest. They experience high temperatures and possess soils with a low capacity to retain water, low nutrient content and high salt concentrations. Studies on bryophytes of restingas have been mostly conducted in Southeastern Brazil, and so we aimed to characterize the bryophyte flora of seven areas of restinga in the Northeastern Region and to establish their floristic affinities with other restingas in Brazil. Fifty-five species were found in the studied restingas, the vast majority of which are generalist species with life forms of intermediate tolerance to desiccation and of corticicolous and terrestrial habitat. The number of species per area is low compared to the species richness of other restingas in Brazil. A cluster analysis, although based on low similarity, showed that the bryoflora from the surveyed areas is distinct from those of restingas from Bahia, Espírito Santo and Rio de Janeiro, which all form a group, and those of the coast of São Paulo, which also comprised a cluster. The heterogeneous climate, soils and vegetation structure of the studied restingas, in comparison those of the Southeast, act as selective filters for the species, thereby contributing to the distinction observed in those communities.

  19. Composition and structure of the Chironomidae (Insecta: Diptera) community associated with bryophytes in a first-order stream in the Atlantic forest, Brazil.

    Science.gov (United States)

    Rosa, B F J V; Dias-Silva, M V D; Alves, R G

    2013-02-01

    This study describes the structure of the Chironomidae community associated with bryophytes in a first-order stream located in a biological reserve of the Atlantic Forest, during two seasons. Samples of bryophytes adhered to rocks along a 100-m stretch of the stream were removed with a metal blade, and 200-mL pots were filled with the samples. The numerical density (individuals per gram of dry weight), Shannon's diversity index, Pielou's evenness index, the dominance index (DI), and estimated richness were calculated for each collection period (dry and rainy). Linear regression analysis was employed to test the existence of a correlation between rainfall and the individual's density and richness. The high numerical density and richness of Chironomidae taxa observed are probably related to the peculiar conditions of the bryophyte habitat. The retention of larvae during periods of higher rainfall contributed to the high density and richness of Chironomidae larvae. The rarefaction analysis showed higher richness in the rainy season related to the greater retention of food particles. The data from this study show that bryophytes provide stable habitats for the colonization by and refuge of Chironomidae larvae, mainly under conductions of faster water flow and higher precipitation.

  20. Studies on Colombian cryptogams XX. A transect analysis of the bryophyte vegetation along an altitudinal gradient on the Sierra Nevada de Santa Marta, Colombia

    NARCIS (Netherlands)

    Reenen, van G.B.A.; Gradstein, S.R.

    1983-01-01

    Along an altitudinal transect on the northern slope of the Sierra Nevada de Santa Marta, Colombia, 500-4100 m, five altitudinal bryophyte zones are distinguished – four forest zones and one páramo zone – based on ecosystem relevé analysis concerning species presence, substrate preference and percent

  1. The estimation of species richness of Dutch bryophytes between 1900 and 2011. Documentation of VBA-procedures based on the Frescalo program

    NARCIS (Netherlands)

    Bijlsma, R.J.

    2013-01-01

    In 2011 the Ministery of Economic Affairs, Agriculture and Innovation asked the BLWG to update the Dutch Red List of bryophytes. The Red List is derived from distribution data recorded between 1900 and 2011 on a quadrant basis (5 x 5 km squares). The Dutch recording grid for distribution data consis

  2. The performance of single- and multi-proxy transfer functions (testate amoebae, bryophytes, vascular plants) for reconstructing mire surface wetness and pH

    Science.gov (United States)

    Mitchell, Edward A. D.; Payne, Richard J.; van der Knaap, Willem O.; Lamentowicz, Łukasz; Gąbka, Maciej; Lamentowicz, Mariusz

    2013-01-01

    Peatlands are widely exploited archives of paleoenvironmental change. We developed and compared multiple transfer functions to infer peatland depth to the water table (DWT) and pH based on testate amoeba (percentages, or presence/absence), bryophyte presence/absence, and vascular plant presence/absence data from sub-alpine peatlands in the SE Swiss Alps in order to 1) compare the performance of single-proxy vs. multi-proxy models and 2) assess the performance of presence/absence models. Bootstrapping cross-validation showing the best performing single-proxy transfer functions for both DWT and pH were those based on bryophytes. The best performing transfer functions overall for DWT were those based on combined testate amoebae percentages, bryophytes and vascular plants; and, for pH, those based on testate amoebae and bryophytes. The comparison of DWT and pH inferred from testate amoeba percentages and presence/absence data showed similar general patterns but differences in the magnitude and timing of some shifts. These results show new directions for paleoenvironmental research, 1) suggesting that it is possible to build good-performing transfer functions using presence/absence data, although with some loss of accuracy, and 2) supporting the idea that multi-proxy inference models may improve paleoecological reconstruction. The performance of multi-proxy and single-proxy transfer functions should be further compared in paleoecological data.

  3. The influence of nitrogen in stemflow and precipitation on epiphytic bryophytes, Isothecium myosuroides Brid., Dicranum scoparium Hewd. and Thuidium tamariscinum (Hewd.) Schimp of Atlantic oakwoods

    Energy Technology Data Exchange (ETDEWEB)

    Leith, I.D. [Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom)], E-mail: idl@ceh.ac.uk; Mitchell, R.J.; Truscott, A.-M. [Centre for Ecology and Hydrology Banchory, Hill of Brathens, Banchory, Aberdeenshire, AB31 4BW (United Kingdom); Cape, J.N.; Dijk, N. van; Smith, R.I.; Fowler, D.; Sutton, M.A. [Centre for Ecology and Hydrology Edinburgh, Bush Estate, Penicuik, Midlothian, EH26 0QB (United Kingdom)

    2008-09-15

    The spatial relationship between the concentration and deposition of the major ions in precipitation and stemflow and their influence on the tissue nitrogen concentration of three epiphytic bryophytes on Quercus petraea (Matt) Liebl. and Q. robur L. was investigated at seven UK Atlantic oak woodland sites with a range of total N deposition of 55-250 mmol m{sup -2}. The main driver of change in tissue N concentrations of three epiphytic bryophytes (Isothecium myosuroides Brid. (Eurhynchium myosuroides (Brid.) Schp.), Dicranum scoparium Hewd. and Thuidium tamariscinum (Hewd.) Schimp.) was total N deposition in stemflow, dominated by ammonium deposition. The three epiphytic species also showed strong relationships between tissue N concentration and total N deposition in rainfall but a poor correlation with total N ion concentration in rainfall. This study shows that epiphytic bryophytes utilise stemflow N and thus increase their risk from inputs of total N deposition compared to terricolous species at the same site. - Stemflow increases the tissue N concentration of epiphytic bryophytes.

  4. Relationship of atmospheric pollution characterized by gas (NO2) and particles (PM10) to microbial communities living in bryophytes at three differently polluted sites (rural, urban, and industrial).

    Science.gov (United States)

    Meyer, Caroline; Gilbert, Daniel; Gaudry, André; Franchi, Marielle; Nguyen, Hung Viet; Fabure, Juliette; Bernard, Nadine

    2010-02-01

    Atmospheric pollution has become a major problem for modern societies owing to its fatal effects on both human health and ecosystems. We studied the relationships of nitrogen dioxide atmospheric pollution and metal trace elements contained in atmospheric particles which were accumulated in bryophytes to microbial communities of bryophytes at three differently polluted sites in France (rural, urban, and industrial) over an 8-month period. The analysis of bryophytes showed an accumulation of Cr and Fe at the rural site; Cr, Fe, Zn, Cu, Al, and Pb at the urban site; and Fe, Cr, Pb, Al, Sr, Cu, and Zn at the industrial site. During this study, the structure of the microbial communities which is characterized by biomasses of microbial groups evolved differently according to the site. Microalgae, bacteria, rotifers, and testate amoebae biomasses were significantly higher in the rural site. Cyanobacteria biomass was significantly higher at the industrial site. Fungal and ciliate biomasses were significantly higher at the urban and industrial sites for the winter period and higher at the rural site for the spring period. The redundancy analysis showed that the physico-chemical variables ([NO(2)], relative humidity, temperature, and site) and the trace elements which were accumulated in bryophytes ([Cu], [Sr], [Pb]) explained 69.3% of the variance in the microbial community data. Moreover, our results suggest that microbial communities are potential biomonitors of atmospheric pollution. Further research is needed to understand the causal relationship underlined by the observed patterns.

  5. Study on Bryophytes in Lateritic Lold Ore of Southwest Guizhou%贵州黔西南红土型金矿苔藓植物的调查

    Institute of Scientific and Technical Information of China (English)

    江洪; 张朝晖

    2012-01-01

    为了探明黔西南红土型金矿苔藓植物种类,为进一步利用苔藓植物作为先锋植物研究红土型金矿区植被修复提供较好的材料,采用梅花采样法对黔西南18个红土型金矿苔藓植物进行全面调查、收集、鉴定.结果表明:金矿区共有苔藓植物14科53属124种,其中,苔类植物1科1属2种,藓类植物13科52属122种;金矿区苔藓植物共有1 2种区系类型,以世界广布种占主体;金矿区苔藓植物丰富度指数、种相似性指数均较低,苔藓植物生活型主要以矮丛集型为主;在18个矿中寻找到5种广泛分布的苔藓植物种类:银叶真藓(Bryum argentenm)、卵蒴丝瓜藓(Pohlia proligera)、纤枝短月藓(Brachymenium exile)和土生对齿藓(Didymodon vinealis)、硬叶小金发藓(Pogonatum neesii).%In order to clarify the species of bryophytes at laterite gold deposits in Southwest Guizhou, provide good material for further use of bryophytes as a pioneer plant of laterite gold deposits of vegetation restoration. The comprehensive investigation with plum sampling, collection, identification of the bryophyte at 18 lateritic gold deposit in Southwest Guizhou. The results showed that 124 mosses species in 53 genera of 14 families were found at the 18 lateritic gold deposits. Thereinto, two liverwort species in one genus of one family, 122 mosses species in 53 genera of 13 families. There are 12 flora types of bryophytes in the lateritic gold deposits area, the main type of flora distribution is cosmopolitan. Richness index and similarity coefficient of bryophyte are all relatively low at the gold area; The life-forms of bryophyte is mainly short turfs. At the same time, there are five species of widespread bryophytes found in the 18 mine: B. argentenm, P. proligera, B. ymenium exile , D. vinealis and P. neesii.

  6. Bryophyte-Feeders in a Basal Brachyceran Lineage (Diptera: Rhagionidae: Spaniinae): Adult Oviposition Behavior and Changes in the Larval Mouthpart Morphology Accompanied with the Diet Shifts

    Science.gov (United States)

    Kato, Makoto

    2016-01-01

    Dipteran larval morphology exhibits overwhelming variety, affected by their diverse feeding habits and habitat use. In particular, larval mouthpart morphology is associated with feeding behavior, providing key taxonomic traits. Despite most larval Brachycera being carnivorous, a basal brachyceran family, Rhagionidae, contains bryophyte-feeding taxa with multiple feeding habits. To elucidate the life history, biology, and morphological evolution of the bryophyte-feeding rhagionids, the larval feeding behavior and morphology, and the adult oviposition behavior of four species belonging to three genera of Spaniinae (Spania Meigen, Litoleptis Chillcott and Ptiolina Zetterstedt) are described. Moreover, changes of the larval morphology associated with the evolution of bryophyte-feeding are traced by molecular phylogenetic analyses. Spania and Litoleptis (thallus-miners of thallose liverworts) share a toothed form of apical mandibular sclerite with an orifice on its dorsal surface, which contrasts to those of the other members of Rhagionidae possessing a blade-like mandibular hook with an adoral groove; whereas, Ptiolina (stem borer of mosses) exhibits a weak groove on the adoral surface of mandible and highly sclerotized maxilla with toothed projections. Based on the larval feeding behavior of the thallus-miners, it is inferred that the toothed mandibles with the dorsal orifice facilitate scraping plant tissue and then imbibing it with a great deal of the sap. A phylogeny indicated that the bryophyte-feeding genera formed a clade with Spaniopsis and was sister to Symphoromyia, which presumably are detritivores. This study indicates that the loss or reduction of adoral mandibular groove and mandibular brush is coincident with the evolution of bryophyte-feeding, and it is subsequently followed by the occurrence of dorsal mandibular orifice and the loss of creeping welts accompanying the evolution of thallus-mining. PMID:27812169

  7. Plant mediated synthesis of silver nanoparticles using a bryophyte: Fissidens minutus and its anti-microbial activity.

    Directory of Open Access Journals (Sweden)

    SRIVASTAVA A.A

    2011-12-01

    Full Text Available Biological methods of synthesis have paved way for the “greener synthesis” of nanoparticles. These have proven to be better methods due to slower kinetics, they offer better manipulation and control over crystal growth and their stabilization. The synthesis of silver nanoparticles by a Bryophyte, Fissidens minutus is reported in this paper. Aqueous Extract of Fissidens minutus treated with 0.5 mM silver nitrate solution produced silver nanoparticles at room temperature rapidly. Nanoparticles were characterized by means of UV–Vis spectroscopy, Scanning electron microscopy (SEM and Energy Dispersive Spectrometry (EDS. Nanosilver has proved as a potent antibacterial agent showing its activity against both gram positive and gram negative organisms. The present study emphasizes the use of primitive plant form for the synthesis of silver nanoparticles.

  8. Estimation de la pollution par métaux lourds dans la Somme par l'analyse des bryophytes aquatiques

    Directory of Open Access Journals (Sweden)

    EMPAIN A.

    1976-01-01

    Full Text Available L'intérêt des bioindicateurs fixés à cycle de vie long réside dans leur indépendance marquée vis-à-vis des saisons ; ils intègrent les grandes variations des paramètres physico-chimiques sur une durée de temps appréciable et procurent une estimation stable et sensible de l'impact des multiples pollutions sur l'écosystème aquatique. Les bryophytes aquatiques seront utilisés ici pour leur pouvoir intégrateur et accumulateur des métaux lourds.

  9. Bryophyte flora in upland forests at different successional stages and in the various strata of host trees in northeastern Pará, Brazil

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Caldeira Tavares-Martins

    2014-03-01

    Full Text Available In the northeastern region of the Brazilian state of Pará, approximately 90% of the forested areas are secondary forests. Secondary forests are interesting areas for floristic studies aimed at determining the effects that clear-cutting has on bryophyte communities. The aim of this study was to compare upland forests at different successional stages and the various strata of host trees, in terms of the bryophyte species composition. Bryophyte specimens were collected between August 2005 and September 2006 from host trees in primary and secondary forests of different ages and of different heights, within the municipality of Capitão Poço, in the state of Pará. The vertical distribution of bryophytes was evaluated in 15 host trees within the primary forest. We identified a total of 99 bryophyte species: 33 mosses and 66 liverworts. The dominant family was Lejeuneaceae, with 56 species. Most of the species (n = 60 had a neotropical distribution, and 3 species were endemic to Brazil. Cololejeunea minutissima var. myriocarpa (Nees & Mont. R.M.Schust., Pycnolejeunea papillosa X.-L. He, Radula mammosa Spruce and Verdoornianthus marsupiifolius (Spruce Gradst. represent new records for the state of Pará. In the successional forests evaluated, we identified 78 species, most of which (n = 38 occurred in primary forest. On the host tree trunks evaluated in the primary forest, we observed 31 species occurring at heights ranging from 2 m to 20 m. Despite the fact that secondary forests account for such a large proportion of the forested areas in Capitão Poço, we found that the bryoflora was relatively rich, comprising 31% of the species recorded for the state. The fact that 40% of the species recorded occurred exclusively in the secondary forests and the fact that 45.5% of the species recorded in primary forest occurred within the 2-20 m height range show the importance of studies focusing on bryophytes in secondary forests and in the upper strata of

  10. A primary survey on bryophyte species reveals two novel classes of nucleotide-binding site (NBS genes.

    Directory of Open Access Journals (Sweden)

    Jia-Yu Xue

    Full Text Available Due to their potential roles in pathogen defense, genes encoding nucleotide-binding site (NBS domain have been particularly surveyed in many angiosperm genomes. Two typical classes were found: one is the TIR-NBS-LRR (TNL class and the other is the CC-NBS-LRR (CNL class. It is seldom known, however, what kind of NBS-encoding genes are mainly present in other plant groups, especially the most ancient groups of land plants, that is, bryophytes. To fill this gap of knowledge, in this study, we mainly focused on two bryophyte species: the moss Physcomitrella patens and the liverwort Marchantia polymorpha, to survey their NBS-encoding genes. Surprisingly, two novel classes of NBS-encoding genes were discovered. The first novel class is identified from the P. patens genome and a typical member of this class has a protein kinase (PK domain at the N-terminus and a LRR domain at the C-terminus, forming a complete structure of PK-NBS-LRR (PNL, reminiscent of TNL and CNL classes in angiosperms. The second class is found from the liverwort genome and a typical member of this class possesses an α/β-hydrolase domain at the N-terminus and also a LRR domain at the C-terminus (Hydrolase-NBS-LRR, HNL. Analysis on intron positions and phases also confirmed the novelty of HNL and PNL classes, as reflected by their specific intron locations or phase characteristics. Phylogenetic analysis covering all four classes of NBS-encoding genes revealed a closer relationship among the HNL, PNL and TNL classes, suggesting the CNL class having a more divergent status from the others. The presence of specific introns highlights the chimerical structures of HNL, PNL and TNL genes, and implies their possible origin via exon-shuffling during the quick lineage separation processes of early land plants.

  11. 丽水市药用苔藓植物资源调查%Investigation on Medicinal Bryophytes in Lishui City, Zhejiang Province

    Institute of Scientific and Technical Information of China (English)

    张晓青; 王军峰; 纪佳娜

    2013-01-01

    The resources of medicinal bryophytes in Iishui were firstly surveyed, 59 species belonging to 46 genera in 33 families were reported as medicinal resources. A preliminary investigation of the habitat, distribution and therapeutic effect of 41 species was given, which can provide basis for further development and utilization of medicinal bryophyte in Lishui City.%对丽水市药用苔藓植物资源进行野外调查和研究,首次报道了丽水市药用苔藓植物33科46属59种,并对其中41种药用苔藓植物的生境、分布及药用功效进行了初步探讨,为丽水市药用苔藓植物的进一步开发利用提供依据.

  12. 苔藓植物DNA条形码的研究进展%The Review on the Study of Bryophytes DNA Barcode

    Institute of Scientific and Technical Information of China (English)

    陈娟; 张安世

    2012-01-01

    [目的]概述DNA条形码在苔藓植物中的研究进展,为将该技术更广泛地用于苔藓植物研究提供参考.[方法]结合DNA务形码技术的发展及其在动、植物研究中的应用.概述了该技术在苔藓植物研究中的现状及研究进展,并呼吁建立专门的机构对苔藓植物进行系统的DNA条形码研究策略,加快苔藓植物的研究.[结果]DNA条形码技术已在动植物研究中得到了广泛的应用,在植物研究中尚未获得理想的被广泛认同的DNA条形码.但研究发现.各种候选片段为苔藓植物分子生物学的发展提供了便利的检测手段.随着该技术的逐步发展完善,其将会在苔藓植物的科学研究中发挥越来越大的作用.[结论]DNA条形码技术是近年来生物学研究的热点,该技术在生命科学、法医学、流行病学、医药及食品质量控制等领域均具有广泛的应用前景.其将极大地促进人类监测、了解以及利用生物多样性的能力.该研究为DNA条形码技术在苔藓植物研究中的应用提供了参考.%[Objective] The aim was to summarize the research progress of DNA barcode in bryophytes,to provide reference for using this technology in bryophytes research widely. [ Methods] Combining the development of DNA barcode technology and its application in animal and plant research,the status rjuo and the research progress of the technology in bryophytes research were reviewed,and calling for establishing the specialized institutions to study the DNA barcode in bryophytes systematically .expediting the study of bryophytes. [ Result] DNA barcode has been widely used in animal and plant research,however,in plant research,the ideal and widely accepted DNA barcode has not yet been obtained. But the research find that each candidate segment provide convenient detection means for the development of molecular systpmatics of bryophytes. With the gradually development and perfection of the technology, the technology

  13. 苔藓植物化感作用研究综述%Review on the Study of Allelopathy Effects of Bryophytes

    Institute of Scientific and Technical Information of China (English)

    刘俊华; 王书平; 马海玲

    2014-01-01

    化感作用是自然界广泛存在的一种物种克生现象,对各生态系统类型具有重要影响。苔藓植物广泛分布于陆地生态系统中,已有的苔藓化感作用研究主要为化感作用的生物测定,整体上尚处起步阶段。该文简要阐述了苔藓植物化感研究的基础,介绍了近年来取得的主要进展,并重点就苔藓植物化感作用研究中存在的问题和今后的发展进行了探讨。%Allelopathy refers to the chemical inhibition of one species by another species,with releasing the inhibitory chemicals into the environment where it affects the development and growth of neighboring plants,and the plant allelopathy has an important influence on all ecosystems. Bryophytes are widespread in terrestrial ecosystems,but the researches on plant allelopathy are just beginning,which rest on the bioas-say of allelopathy. This paper introduced the feasibility of bryophytes allelopathy research ,elucidated the progress of research on the bryophytes allelopathy in the past decades,discussed the existing problems and direction in the field of bryophytes allelopathy.

  14. The Present Situation and Prospect of Bryophyte Research in Xinjiang%新疆苔藓植物的研究现状与展望

    Institute of Scientific and Technical Information of China (English)

    张元明; 曹同; 潘伯荣

    2001-01-01

    新疆苔藓植物系统、全面的研究起步较晚。到目前为止,主要研究仅限于苔藓植物区系、形态解剖学的研究,同国内其它地区的苔藓植物区系研究尚有较大的差距。目前已记录的新疆苔藓植物有55科、163属、419种,而且昆仑山和阿尔泰山的区系研究还有待于进一步深入。尤其是在新疆苔藓植物生态学和多样性方面的研究仍处于空白状态。本文介绍了新疆苔藓植物研究的现状、存在的问题及对今后研究工作的展望。%The study of bryophyte in Xinjiang has become relatively lat e. The main research work only focus on bryophyte flora and morphological observ ation so far, and falls behind those reaserch work in some other provinces in Ch ina. The bryoflora in Xinjiang consists of 419 species belonging to 163 genera o f 55 families, while the bryoflora of Altai Mountains and Kunlun Mountains still need more investigations. Especially, the research of bryophyte ecology and bio diversity are still in blank field. This paper mainly deals with the prese nt situation, problems and prospect of bryophyte research in Xinjiang.

  15. THE MEDICINAL BRYOPHYTES FROM SHANDONG PROVINCE%山东省的药用苔藓植物及开发利用前景

    Institute of Scientific and Technical Information of China (English)

    衣艳君

    2000-01-01

    Report 20 species of medicinal bryophytes in Shandong Privince. They are belong to 15 families and 19 genera. Suggestions of the exploitation and utilizationwere also proposed.%报道了山东药用苔藓植物20种,隶属于15科19属;对进一步开发利用药用苔藓资源提出了建议。

  16. 一种新型生物能源发光苔藓的研究%Research on a New Kind of Biological Energy Luminous Bryophytes

    Institute of Scientific and Technical Information of China (English)

    阚义; 张欣妮

    2012-01-01

    利用转基因技术将萤火虫的荧光基因和苔藓融合,产生一种新的生物替代能源,其原理是通过荧光现象和光合作用的协同,实现低消耗的能量循环,成为一个自给自足的供光体系。作为地下的供光系统,苔藓的某些生活特性可以有效地解决矿难的发生。其衍生品光苔灯,可以应用到公共环境照明中。以光苔能源改善社会的能源结构,从而达到可持续发展的目的,实现绿色能源的广泛普及。%By the transgene technology,the bryophytes trangensis can be done with the luciferase gene. Ultimately ,we can get a new kind of biological energy. The combination between photosynthesis and photoluminescence create a energy cycle with low consumption,providing a self- sufficiency illumination system for plants. As a lighting system underground, some fixed features of bryophytes can avoid mine disaster. Its derivative, the lamp made by luminous bryophytes, can be used in city life. In the end,the exist of luminous bryophytes will ameliorate the energy structure, aiming at realizing sustainable development and the availability of green energy.

  17. On Species Diversity of Epiphytic Bryophytes in Hangzhou%杭州市树附生苔藓植物多样性

    Institute of Scientific and Technical Information of China (English)

    官飞荣; 茹雅璐; 胡忠健; 陈尊委; 吴玉环

    2016-01-01

    通过野外调查和标本鉴定,对杭州市树附生苔藓植物的多样性进行研究。结果发现,杭州市区共有树附生苔藓植物21科38属48种,包含多于4个种的树附生苔藓植物优势科为灰藓科、丛藓科、碎米藓科和牛舌藓科。α多样性分析结果显示不同样地树附生苔藓植物多样性有比较明显的差别。杭州植物园、浙江大学玉泉校区、龙井等几个样地多样性明显较高,而虎跑和浙江大学紫金港校区最低。%The species diversity of epiphytic bryophytes in Hangzhou is researched by field investigations and lab specimen identifications .48 species of epiphytic bryophytes belonging to 38 genera and 21 families are found in Hangzhou city .Dominant families with more than four species are Hypnaceae , Pottiaceae , Fabroniaceae and Anomodontaceae .αdiversity analysis shows that there are obvious differences of epiphytic bryophyte diversity among different sample sites .The epiphytic bryophyte diversities are relatively high in Hangzhou Botanical Garden ,Yuquan Campus of Zhejiang University and Longjing ,while low in Hupao and Zijingang Campus of Zhejiang University .

  18. 山西省苔藓植物的研究概况及展望%The Present Situation and Prospect of Bryophyte Tesearch in Shanxi Province

    Institute of Scientific and Technical Information of China (English)

    张二芳

    2009-01-01

    对山西省苔藓植物的研究现状进行了总结并依据现有文献资料整理出山西省苔藓植物名录,现已知山西省苔藓植物43科111属265种(含11变种,2亚种),其中,藓类34科100属250种(含11变种,2亚种),苔类9科11属15种.%This paper has summarized the present situation of bryophyte research in Shanxi Province. There are 265 species of bryophytes, 11 varieties and 2 subspecies belong to 111 genera and 43 families in Shanxi Province at present. Among them, there are 15 species of liverworts belong to 11 genera and 9 families, 250 species of mosses, 11 varieties and 2 subspecies belong to 100 genera and 34 families. The checklist of bryophyte in Shanxi Province is listed after this paper.

  19. Brief Analysis of the Application of Bryophyte in Courtyard Landscape%苔藓植物在庭院景观中的应用分析

    Institute of Scientific and Technical Information of China (English)

    李劲廷

    2015-01-01

    指出了由于庭院空间受到光照不足、排水不畅、面积较小等自身因素的限制,在造景时能选择的观赏植物种类较少、品种单一,导致部分的庭园景观出现了同一性。从苔藓植物的特点、优点出发,对苔藓植物在庭院景观中的应用进行了初步探索,以期对我国苔藓绿化和庭园景观的融合起到促进作用。%Due to the courtyard space has the disadvantages of insufficient lighting ,poor drainage and small areas ,it can only choose few ornamental plant species and varieties ,which cause that some of the courtyard landscapes are quite similar .Starting from the characteristics and advantages of bryophytes ,the article preliminarily explores the application of bryophytes in the courtyard ,which aims to promote the fusion of bryophytes and courtyard landscape in China .

  20. Investigation on Bryophytes in Wansan Mercury Mining Area in Guizhou Province%贵州万山汞矿区苔藓植物物种调查

    Institute of Scientific and Technical Information of China (English)

    王美会; 龙正标; 谭琪明; 高扬

    2016-01-01

    Objective] The aim was to investigate bryophyte resources in Wanshan mercury mining area in Guizhou Province.[Method] Accord-ing to the appearance features and a variety of reference books,bryophyte resources in Wanshan mercury mining area in Guizhou Province were i-dentified.[Result] There was a total of 95 species(including subspecies and varieties),belonging to 52 genera of 27 families,comprised 84 spe-cies of moss,belonging to 45 genera of 21 families,and 11 species of liverworts,belonging to 7 genera of 11 species.[Conclusion] The diversity of bryophyte species in Wanshan mercury mining area in Guizhou is not abundant .%[目的]了解贵州万山汞矿区苔藓植物物种资源状况。[方法]根据外形特征并参考各种苔藓植物分类的工具书,对贵州万山汞矿区苔藓植物资源进行鉴定。[结果]该地区苔藓植物共有27科52属95种(包括亚种和变种),其中包括藓类21科45属84种,苔类6科7属11种。[结论]贵州万山汞矿区苔藓植物物种多样性不丰富。

  1. Distribution and Analysis on the Resource of Bryophytes in Luliang District%吕梁市区苔藓植物资源分布及分析

    Institute of Scientific and Technical Information of China (English)

    张二芳; 邵丽华; 刘永英; 赵建成

    2011-01-01

    The Bryophytes resources at six sampling sites in Luliang district of Shanxi province were investigated,collected , identified and analysed statistically. The results showed that there were 11 species under 8 genera and 3 families of bryophytes. Aloina rigida ( Hedw. ) Limpr is a new record of Shanxi province. As a typical drought-resistant type of moss, Aloina rigida is distributed in large number in five of sampling sites. And this reflected the Liiliang arid climatic conditions. The results showed that the bryophyte richness was related to human disturbance.%在山西省吕梁市离石城区选取6个样地,对苔藓植物资源进行了野外调查、标本采集、鉴定和数据统计.结果表明,吕梁市区共有苔藓植物11种,隶属于3科,8属.其中芦荟藓(Aloinarigida (Hedw.) Limpr.)属于山西省新纪录种.研究发现,属于典型耐旱型的芦荟藓在其中5个样地均有大量分布,反映了吕梁市干旱的气候条件.吕梁市苔藓植物的多样性还与人为干扰密切相关.

  2. Ecological functions of bryophyte:Recent research progress%苔藓植物生态功能研究新进展

    Institute of Scientific and Technical Information of China (English)

    田维莉; 孙守琴

    2011-01-01

    苔藓植物是一种形体微小、结构简单的高等植物,是水生向陆生的一种过渡形式,是高等植物中最原始的类群.随着研究的发展,人们越来越意识到苔藓植物在生态系统结构和功能中具有非常重要的作用,而且对苔藓在生物监测、水土保持、森林更新等方面已有一些研究和综述.本文针对目前环境科学研究中的一些热点问题,从全球气候变化、生态系统C、N、P循环等方面对近年来苔藓植物的生态功能研究方面的新进展进行了综述,以期加深人们对苔藓的认识并促进苔藓植物生态功能的进一步深入研究.%Bryophyte is a kind of higher plants with small size and simple structure, being the transitional form from aquatic to terrestrial and the most original group of existing higher plants.With the development of scientific research, people realized more and more the important roles of bryophyte in the structure and function of ecosystem.Some researches were made on the roles of bryophyte in environmental bio-monitoring, water and soil conservation, and forest regeneration.Aiming at the hotspots in environmental sciences research, and from the viewpoints of global climate change and ecosystem carbon, nitrogen, and phosphorus cycles, this paper summarized the recent research progress in the ecological functions of bryophyte, which could be helpful to deepen our understanding on bryophyte and to promote the researches of its ecological functions.

  3. Small-scale hydropower plants and rare bryophytes and lichens. Knowledge and lack of knowledge; Smaakraftverk og sjeldne moser og lav. Kunnskap og kunnskapsmangler

    Energy Technology Data Exchange (ETDEWEB)

    Evju, Marianne; Hassel, Kristian; Hagen, Dagmar; Erikstad, Lars

    2011-08-15

    There is a large and increasing interest for the development of small-scale hydropower in Norway. Small-scale hydropower plants may impact the biological diversity negatively through destruction, degradation or fragmentation of habitats. Both the environmental investigations and the treatment of applications for small-scale hydropower plants put a great emphasis on red listed species, and in particular on red-listed bryophytes and lichens growing in stream ravines and in meadows and rock faces influenced by waterfalls. Bryophytes and lichens can be difficult to identify in the field, and knowledge of the species' ecology, distribution and population sizes is insufficient. A large review of environmental investigations of small-scale hydropower plants, documented that red-listed lichens were rarely recorded, and red-listed bryophytes were never recorded. In this report, we try to make visible the knowledge we have and the knowledge we lack of red listed bryophytes and lichens in areas in which the development of small-scale hydropower is relevant. Most focus is placed on bryophytes. The report is mainly a collation of existing knowledge. There is a great variation among stream ravines in the occurrence of species. Several factors, such as stability of moisture conditions, tree species composition and bedrock, interact to affect the occurrence of species. Red-listed bryophytes and lichens occur both in the forest and in affiliation with the stream. A reduction of local moisture, through e.g. logging of forest close to the stream or reduction of the water flow, will probably affect the species negatively. River regulation will change the frequency of flooding and affect the ice drift in the stream, which may negatively affect species living on dead wood in or close to the stream. Several species are vulnerable to deteriorated habitat quality and habitat fragmentation as their habitat requirements are narrow and their dispersal capacity is limited. However, we

  4. The vanguard role of bryophytes in the course of vegetation restoration of Karst degradation area%退化喀斯特地区植被恢复过程中苔藓的先锋作用

    Institute of Scientific and Technical Information of China (English)

    王圳; 张金池; 于水强; 王潇; 王如岩; 崔晓晓

    2011-01-01

    在贵州花江喀斯特高原生态综合治理试验示范区内采集苔藓植物样品,鉴别了主要苔藓种类,测定苔藓植物的持水性能,分析了苔藓、岩石接触面形成土壤的化学性质.结果表明:试验区内苔藓植物共有11科26属65种,以藓类植物为主;自然状态下苔藓植物含水率为36%~89.8%;新鲜苔藓持水率为212.3%~515.9%;苔藓、岩石接触面的土壤属于土壤养分分级的一级标准,各项养分指标亦明显高于对照样地.苔藓植物对喀斯特石漠生境有极强的适应性,是石漠化及其他退化生态系统进行人工生态恢复中理想的物种选择.%In the comprehensive treatment ecological demonstration area of Huajiang Karst plateau in Guizhou province,by collecting samples of bryophytes, identifying the major bryophytes species, checking the water retention ability in bryophytes, analyzing the chemical properties of soil formation in rock contact surface. The results showed that: The bryophytes in experimental area consisted of 11 families, 26 genera, 65 species, were dominated by mosses. Water content of natural bryophytes was ranged from 36 % to 89. 8 %. The water holdup of fresh bryophytes was between 212. 3% and 515.9%. The soil in bryophytes and rock contact surface was in the first standard of the soil nutrients classification. The indicators of soil nutrient were much higher than the blank sample. The results indicate that bryophytes are strongly adaptable to the Karst area. It's an ideal choice to use bryophytes to restore vegetation to the stony desertification area.

  5. How do temperate bryophytes face the challenge of a changing environment? Lessons from the past and predictions for the future.

    Science.gov (United States)

    Désamoré, Aurélie; Laenen, Benjamin; Stech, Michael; Papp, Beata; Hedenäs, Lars; Mateo, Ruben G; Vanderpoorten, Alain

    2012-09-01

    Bryophytes are a group of early land plants, whose specific ecophysiological and biological features, including poikilohydry, sensitivity to moderately high temperature and high dispersal ability, make them ideal candidates for investigating the impact of climate changes. Employing a combined approach of species distribution modelling (SDM) and molecular phylogeography in the temperate moss Homalothecium sericeum, we explore the significance of the Mediterranean refugia, contrasting the southern and northern refugia hypotheses, determine the extent to which recolonization of previously glaciated areas has been facilitated by the high dispersal ability of the species and make predictions on the extent to which it will be impacted by ongoing climate change. The Mediterranean areas exhibit the highest nucleotidic diversities and host a mixture of ancestral, endemic and more recently derived haplotypes. Extra-Mediterranean areas exhibit low genetic diversities and Euro-Siberian populations display a significant signal of expansion that is identified to be of Euro-Siberian origin, pointing to the northern refugia hypothesis. The SDMs predict a global net increase in range size owing to ongoing climate change, but substantial range reductions in southern areas. Presence of a significant phylogeographical signal at different spatial scales suggests, however, that dispersal limitations might constitute, as opposed to the traditional view of spore-producing plants as efficient dispersers, a constraint for migration. This casts doubts about the ability of the species to face the massive extinctions predicted in the southern areas, threatening their status of reservoir of genetic diversity.

  6. Research Progress in Bryophyte Sporogenesis%苔藓植物孢子发生的研究进展

    Institute of Scientific and Technical Information of China (English)

    于明; 周云龙

    2001-01-01

    Sporogenesis in bryophytes is a complex cytomorphogenetic process. It is characterized by precise nuclear and cytoplasmic divisions resulting in tetrads of haploid spores and the development of spore wall. The structure in cytoplasmic lobing, plastid and nuclear change, system of microtubules and the meiotic spindle, meiotic cytokinesis, spore wall development of bryophytesporogenesis are introduced in this paper.%苔藓植物孢子发生的过程是一个复杂的形态建成的过程,在此过程中,孢子母细胞经过减数分裂的两次精确的核分裂以及细胞质分裂,形成单倍体的四分孢子,再经孢子壁的发育过程,形成成熟的孢子。本文重点介绍了苔藓植物孢子发生过程中细胞质裂片、质体及核的变化、微管系统及纺锤体、胞质分裂和孢子壁形成过程的特点及其研究进展。

  7. Historical nitrogen content of bryophyte tissue as an indicator of increased nitrogen deposition in the Cape Metropolitan Area, South Africa

    Energy Technology Data Exchange (ETDEWEB)

    Wilson, D. [Botany Department, University of Cape Town, Rondebosch 7701 (South Africa); Stock, W.D. [Botany Department, University of Cape Town, Rondebosch 7701 (South Africa); Centre for Ecosystem Management, School of Natural Sciences, Edith Cowan University, 100 Joondalup Drive, Joondalup, Perth, WA 6027 (Australia)], E-mail: w.stock@ecu.edu.au; Hedderson, T. [Botany Department, University of Cape Town, Rondebosch 7701 (South Africa)

    2009-03-15

    Information on changes in precipitation chemistry in the rapidly expanding Cape Metropolitan Area (CMA) of South Africa is scarce. To obtain a long-term record of N deposition we investigated changes in moss foliar N, C:N ratios and nitrogen isotope values that might reflect precipitation chemistry. Tissue from 9 species was obtained from herbarium specimens collected between 1875 and 2000 while field samples were collected in 2001/2002. There is a strong trend of increasing foliar N content in all mosses collected over the past century (1.32-1.69 %N). Differences exist between ectohydric mosses which have higher foliar N than the mixohydric group. C:N ratios declined while foliar {delta}{sup 15}N values showed no distinct pattern. From relationships between moss tissue N and N deposition rates we estimated an increase of 6-13 kg N ha{sup -1} a{sup -1} since 1950. Enhanced N deposition rates of this magnitude could lead to biodiversity losses in native ecosystems. - This study of bryophyte tissue nutrient contents shows a historical increase in N deposition rates to the low nutrient adapted plant biodiversity hotspot in the Western Cape, South Africa.

  8. Briófitas de caatinga: 2. Agrestina, Pernambuco, Brasil Bryophytes of caatinga 2: Agrestina, Pernambuco, Brasil

    Directory of Open Access Journals (Sweden)

    Kátia Cavalcanti Pôrto

    1996-07-01

    Full Text Available Em uma área de caatinga do município de Agrestina (Lat. 8º27'28"S; Long. 35º57'13"W - PE foram identificadas 13 espécies de Bryophyta, pertencentes as famílias Frullaniaceae, Lejeuneaceae, Ricciaceae - Hepaticopsida-Bryaceae, Dicranaceae, Ephemeraceae, Fissidentaceae, Leucobryaceae, Pottiaceae e Stereophyllaceae - Bryopsida. Constituem-se novos registros para a região Nordeste Cololejeunea minutíssima (Sm. Schiffn. e Riccia brasiliensis Schiffn. e para Pernambuco Frullania dusenii Steph.In a caatinga area, located in Agrestina (Lat. 8º27'28"S; Long. 35º57'13"W - PE were identified 13 species of Bryophyte, distributed in the following families Frullaniaceae, Lejeuneaceae, Ricciaceae - Hepaticopsida - Bryaceae, Dicranaceae, Ephemeraceae, Fissidentaceae, Leucobryaceae, Pottiaceae e Stereophyllaceae - Bryopsida. Cololejeunea minutíssima (Sm. Schiffn. and Riccia brasiliensis Schiffn. are new records for the Northeast region, while Frullania dusenii Steph. represents a new record for the Pernambuco State.

  9. Electrical output of bryophyte microbial fuel cell systems is sufficient to power a radio or an environmental sensor.

    Science.gov (United States)

    Bombelli, Paolo; Dennis, Ross J; Felder, Fabienne; Cooper, Matt B; Madras Rajaraman Iyer, Durgaprasad; Royles, Jessica; Harrison, Susan T L; Smith, Alison G; Harrison, C Jill; Howe, Christopher J

    2016-10-01

    Plant microbial fuel cells are a recently developed technology that exploits photosynthesis in vascular plants by harnessing solar energy and generating electrical power. In this study, the model moss species Physcomitrella patens, and other environmental samples of mosses, have been used to develop a non-vascular bryophyte microbial fuel cell (bryoMFC). A novel three-dimensional anodic matrix was successfully created and characterized and was further tested in a bryoMFC to determine the capacity of mosses to generate electrical power. The importance of anodophilic microorganisms in the bryoMFC was also determined. It was found that the non-sterile bryoMFCs operated with P. patens delivered over an order of magnitude higher peak power output (2.6 ± 0.6 µW m(-2)) than bryoMFCs kept in near-sterile conditions (0.2 ± 0.1 µW m(-2)). These results confirm the importance of the microbial populations for delivering electrons to the anode in a bryoMFC. When the bryoMFCs were operated with environmental samples of moss (non-sterile) the peak power output reached 6.7 ± 0.6 mW m(-2). The bryoMFCs operated with environmental samples of moss were able to power a commercial radio receiver or an environmental sensor (LCD desktop weather station).

  10. Assessment of human exposure to environmental heavy metals in soils and bryophytes of the central region of Portugal.

    Science.gov (United States)

    Reis, Amélia Paula; Patinha, Carla; Ferreira da Silva, Eduardo; Sousa, António; Figueira, Rui; Sérgio, Cecilia; Novais, Vera

    2010-04-01

    This study intends to identify the spatial patterns of variation for some metals and metalloids, in soils and mosses, in the central region of Portugal. The purposes were: (i) to identify relationships amongst five elements (Cu, Pb, Zn, Cr and As) in three different media (topsoil, bottom soil and bryophytes) and with some site-specific characteristics, using Multiple Correspondence Analysis; (ii) to define spatial patterns of variation for the associations identified by Multiple Correspondence Analysis using Variography and Ordinary Kriging; and (iii) to assess atmospheric deposition as a source of heavy metals to the topsoil by crossing results with the biomonitors. The results indicated relatively low metal concentrations in soils and mosses. Some metal associations and dissociations were identified. The spatial patterns of variation of bottom and topsoil are distinct. There is some evidence that different site-specific characteristics control the spatial distribution of different elements. The areas within the central region of Portugal with a higher vulnerability to metal contamination were identified.

  11. Electrical output of bryophyte microbial fuel cell systems is sufficient to power a radio or an environmental sensor

    Science.gov (United States)

    Dennis, Ross J.; Felder, Fabienne; Cooper, Matt B.; Royles, Jessica; Harrison, Susan T. L.; Smith, Alison G.; Howe, Christopher J.

    2016-01-01

    Plant microbial fuel cells are a recently developed technology that exploits photosynthesis in vascular plants by harnessing solar energy and generating electrical power. In this study, the model moss species Physcomitrella patens, and other environmental samples of mosses, have been used to develop a non-vascular bryophyte microbial fuel cell (bryoMFC). A novel three-dimensional anodic matrix was successfully created and characterized and was further tested in a bryoMFC to determine the capacity of mosses to generate electrical power. The importance of anodophilic microorganisms in the bryoMFC was also determined. It was found that the non-sterile bryoMFCs operated with P. patens delivered over an order of magnitude higher peak power output (2.6 ± 0.6 µW m−2) than bryoMFCs kept in near-sterile conditions (0.2 ± 0.1 µW m−2). These results confirm the importance of the microbial populations for delivering electrons to the anode in a bryoMFC. When the bryoMFCs were operated with environmental samples of moss (non-sterile) the peak power output reached 6.7 ± 0.6 mW m−2. The bryoMFCs operated with environmental samples of moss were able to power a commercial radio receiver or an environmental sensor (LCD desktop weather station). PMID:27853542

  12. 附生苔藓植物对城市大气环境的生态监测%Ecological monitoring of epiphytic bryophytes for air pollution in urbanization

    Institute of Scientific and Technical Information of China (English)

    崔明昆

    2001-01-01

    伴随着工业化及城市化进程的推进而引发的大气污染问题正日益受到人们的重视。作为对大气污染敏感的附生苔藓植物在生态监测中起着十分重要的作用。文章探讨了附生苔藓植物与大气污染的关系及其在大气环境中的生态监测作用。%As indicators for environment, epiphytic bryophytes have an important role in air pollution. In this paper, the relationships between epiphytic bryophytes and urban air pollution, and the ecological monitoring methods of epiphytic bryophytes in urban air pollution are discussed.

  13. Analysis of Growth Situation of Two Types'Bryophytes on the Matrix of Building Materials%两种苔藓植物在建筑材料基质上的生长情况研究

    Institute of Scientific and Technical Information of China (English)

    金时超; 付茂; 郝钰斌; 刘宏涛

    2015-01-01

    In the recent years ,the application of the bryophytes is emerging .However ,the application of bryo‐phyte in building materials is still not mature enough .With the method of comparative experiments ,the arti‐cle chooses two kinds of common bryophytes in Wuhan ,namely Brachythecium albicans and Plagiomnium cuspidatum ,to study their growth on the many kinds of building materials .The article adopts the SPSS re‐gression analysis to predict the future growth .The results show that growth situations of bryophytes are both fine on the ecological concrete and clay bricks .Meanwhile ,by the growth of bryophytes on the slope and tree body ,the article preliminarily draws a conclusion that bryophytes can survive on the vertical space .Fi‐nally ,the article puts forward reasonable suggestions for the application of vertical greening in bryophytes .%采用对比实验的方法,对武汉市常见的青藓和尖叶走灯藓两种苔藓在多种建筑材料上进行了生长情况研究,运用SPSS回归分析,预测了未来可能的生长情况。结果表明:两种苔藓在生态砼和红土砖块上生长状况都比较好。通过苔藓在斜坡和树体上的生长情况,初步得出结论苔藓在垂直空间上可以生存生长,对苔藓的垂直绿化应用提出了合理的建议。

  14. Study on Life Type and List of Bryophytes of Qixingguan Old Town in Bijie City%毕节市七星关老城区苔藓植物名录及生活型研究

    Institute of Scientific and Technical Information of China (English)

    蒋洁云; 朱娟; 张梦秋

    2016-01-01

    In order to provide a reference for other research and conservation urban bryophytes resources,this paper prepared lsit of bryophytes of Qixingguan Old Town in Bijie City and analyzed their life type.%该文编制了毕节市七星关老城区苔藓植物名录,并分析了其生活型类型,为毕节城区植物资源信息库补充资料以及苔藓植物资源的其它研究和保护提供参考依据。

  15. A STUDY ON THE BRYOPHYTES OF KARST CAVE THRESHOLD AT KUNMING AREA IN YUNNAN PROVINCE, P.R.CHINA%中国昆明地区岩溶洞穴洞口带苔藓植物研究(摘要)

    Institute of Scientific and Technical Information of China (English)

    张朝晖; 彭涛; 李晓娜; 赵传海

    2004-01-01

    164 bryophyte specimens were collected from 12 karst caves in Yunnan Province, P.R. China. We found 25 species in 18 genera and 10 families which were listed with site, substrate, altitude, date, collectors . Fieldwork indicated the bryophytes grew within 0~26 m at the cave entrance. The cave luminous liverwort Cyathodium cavernarum Kunze was recorded in 6 caves. Two turf species, Gymnostomum aurantiacum (Mitt) Jaeg and G. recurvirostre Hedw. were associated with travertine deposition such as stalactite or wet stalagmite at thresholds.

  16. 中国药用苔藓植物研究的文献分析(Ⅱ)%Analysis on Literatures of Chinese Medicinal Bryophytes(Ⅱ)

    Institute of Scientific and Technical Information of China (English)

    韩国营; 宋培浪; 于美玲; 赵厚涛

    2013-01-01

    为更好地了解我国药用苔藓植物资源的现状,为药用苔藓植物化学成分、药效等深入研究提供依据,按照中国苔藓植物分区,对各分区内40余篇报道药用苔藓植物资源调查的学术论文进行研究分析.结果表明:在中国苔藓植物10个分区中,华北区、云贵区、华东区和华中区是我国药用苔藓植物资源文献报道较多的地区,而横断山区则未见报道;贵州、山东和河北等省份报道较多,江苏、陕西、青海、西藏、海南、广东、澳门、香港和台湾等省区未见有专门报道.%In order to get more attention and understanding about current status of medicinal bryophyte resources,and to provide basic references for further studying on chemical components and pesticide effects of bryophytes,more than 40 literatures,according to the bryological regions of China,were reviewed and analyzed.The results showed that there were more literatures reported in the North China region,Yunnan-Guizhou region,East China region and Central China region,but no literature in the Hengduan Mts region.Among the districts of China,Guizhou,Shandong and Hebei published more papers of medicinal bryophyte resources,but Jiangsu,Shaanxi,Qinghai,Tibet,Hainan,Guandong,Macao and Hongkong had not reported any special literatures.

  17. 内蒙古苔藓植物群落生态学研究综述%Review of Study on Community Ecology of Bryophyte in Inner Mongolia

    Institute of Scientific and Technical Information of China (English)

    乌日嘎玛拉; 田桂泉

    2012-01-01

    In this paper, the achievements in the community ecology of bryophyte research in Inner Mongolia are reviewed,which were floristic composition,geographical distribution,dominant species of different vegetations, reproduction and physiological ecology, and relationship between species distribution with environmental factors. Compared with other areas of China, fruitful results were achieved in the research of the bryophytes floristic and mosses reproductive ecology to reveal the formation and succession mechanism of bryophytes community, initial results of moss physioecology researches were achieved; meanwhile,we still have a long way to go in the research of community structure,pattern,niche,communities and patch development rate in different habitats,physiological ecology studies of bryophyte need to be extended further,and the research of reproduction ecology were short of studying on the adaptability difference and interspecies competition of the same and the different life form species in the process of population colonizing and expanding in different environments.%综述了内蒙古苔藓植物群落的物种组成、物种区系地理成分及优势种构成、藓类植物繁殖与生理生态学,以及苔藓植物群落生态分布与环境的关系等方面的研究进展.与国内其他地区相比,内蒙古苔藓植物群落区系研究,在以揭示群落形成和演替为目标的藓类植物繁殖生态学方面取得了丰富的成果,藓类植物生理生态学研究初见成效;群落结构、格局、生态位、不同生境群落及斑块发育速率方面的研究还有一定差距,生理生态学研究有待进一步拓展;在繁殖生态学方面,缺少不同物种、不同生活型物种的种群定居与扩展对环境的适应性差异和不同环境下种间竞争的研究.

  18. 河北省苔藓植物研究现状与展望%The Present Situation and Prospect of Bryophyte Research in Hebei Province

    Institute of Scientific and Technical Information of China (English)

    李敏; 王立宝; 王晓蕊; 赵建成

    2012-01-01

    在简要回顾河北省苔藓植物研究历史的基础上,重点介绍了河北省苔藓植物的研究现状,并指出了研究中存在的不足,为进一步的研究工作提出了建设性意见.%Based on the history of bryophyte study in Hebei province, the present situation was introduced in detail and the insufficiency was also pointed out.The prospect was put forward.

  19. Does cross-taxon analysis show similarity in diversity patterns between vascular plants and bryophytes? Some answers from a literature review.

    Science.gov (United States)

    Bagella, Simonetta

    2014-04-01

    The objective of this study was to clarify the taxon surrogacy hypothesis relative to vascular plants and bryophytes. A literature review was conducted to obtain papers that met the following criteria: (i) they examined species richness values; or (ii) they evaluated the species richness within the same study sites, or under the same spatial variation conditions. Twenty-seven papers were accessed. The richness of the two taxa, compared in 32 cases, positively co-varied in about half of the comparisons. The response to the spatial variation in environmental or human-induced factors of the two taxa in terms of species richness was rather variable. Based on current knowledge, the main documented findings regard forest habitats and nival gradients. In forest habitats, co-variation in species richness is likely when similar environments are analysed and seems to be strengthened for boreal forests. Along the nival gradient, a different response in terms of richness of the two taxa suggests that vascular plants cannot be considered good surrogates for bryophytes.

  20. Study on Bryophytes Flora in Tianma Nature Reserve of Anhui Province, China%天马自然保护区苔藓植物区系研究

    Institute of Scientific and Technical Information of China (English)

    师雪芹; 陈家伟

    2012-01-01

    通过调查,天马自然保护区共有苔藓植物50科94属176种.保护区优势科为真藓科Bryaceae、曲尾藓科Dicranaceae、青藓科Brachytheciaceae、灰藓科Hypnaceae、提灯藓科Mniaceae、光萼苔科Porellaceae、锦藓科Sematophyllaceae、金发藓科Polytrichaceae、羽藓科Thuidiaceae和绢藓科Entodontaceae;优势属为光萼苔属Porella、曲柄藓属Campylopus、凤尾藓属Fissidens、真藓属Bryum、匐灯藓属Plagiomnium、泽藓属Philonotis和绢藓属Entodon.区系成分以东亚成分为主(37.04%),温带成分次之(33.33%),热带成分较少(25.31%).%176 species belonging to 94 genera in 50 families of bryophyte are reported in Tianma Nature Reserve located in the west of Anhui province. The predominant families are Bryaceae, Dicranaceae, Brachytheciaceae, Hypnaceae, Mniaceae, Porellaceae, Sematophyllaceae, Polytrichaceae, Thuidiaceae and Entodontaceae; predominant genera are Porella , Campylopus, Fissidens , Bryum , Plagiomnium , Philonotis , Entodon . Based on the analysis of geographic elements of species, the result shows the East Asiatic element is dominant, accounting for about 37. 04% , the temperate element accounts 33. 33% of the whole bryophyte flora and the proportion of the tropical element is 25.31 % .

  1. Responses to desiccation stress in bryophytes and an important role of dithiothreitol-insensitive non-photochemical quenching against photoinhibition in dehydrated states.

    Science.gov (United States)

    Nabe, Hayase; Funabiki, Ryoko; Kashino, Yasuhiro; Koike, Hiroyuki; Satoh, Kazuhiko

    2007-11-01

    The effects of air drying and hypertonic treatments in the dark on seven bryophytes, which had grown under different water environments, were studied. All the desiccation-tolerant species tested lost most of their PSII photochemical activity when photosynthetic electron transport was inhibited by air drying, while, in all the sensitive species, the PSII photochemical activity remained at a high level even when photosynthesis was totally inhibited. The PSI reaction center remained active under drying conditions in both sensitive and tolerant species, but the activity became non-detectable in the light only in tolerant species due to deactivation of the cyclic electron flow around PSI and of the back reaction in PSI. Light-induced non-photochemical quenching (NPQ) was found to be induced not only by the xanthophyll cycle but also by a DeltapH-induced, dithiothreitol-insensitive mechanism in both the desiccation-tolerant and -intolerant bryophytes. Both mechanisms are thought to have an important role in protecting desiccation-tolerant species from photoinhibition under drying conditions. Fluorescence emission spectra at 77K showed that dehydration-induced quenching of PSII fluorescence was observed only in tolerant species and was due to neither state 1-state 2 transition nor detachment of light-harvesting chlorophyll protein complexes from PSII core complexes. The presence of dehydration-induced quenching of PSI fluorescence was also suggested.

  2. Study of bis(bibenzyls) in bryophytes using electron ionization time-of-flight and electrospray ionization triple-quadrupole mass spectrometry.

    Science.gov (United States)

    Guo, Huaifang; Xing, Jie; Xie, Chunfeng; Qu, Jianbo; Gao, Yanhui; Lou, Hongxiang

    2007-01-01

    A detailed analysis of mass spectra generated from bis(bibenzyl) compounds in bryophytes under electron ionization time-of-flight (EI-TOF) and electrospray ionization triple-quadrupole (ESI-TQ) mass spectrometry conditions is reported. Proposed structures of the fragment ions were obtained by tracking the functional groups of 15 bis(bibenzyls), the structures of which are similar except for some alkoxyl substituents and linkage sites of biphenyl ether bonds. The elucidation was aided by the use of accurate mass measurements. Attempts have been made to provide rational pathways for the formation of these fragment ions, and a generalized fragmentation mechanism is proposed. The bis(bibenzyls) mentioned in this study include three types according to their structure characteristics, i.e. one biphenyl ether bond (A-type), two biphenyl ether bonds (B-type), one biphenyl ether and one biphenyl bond (C-type). The three types display different EI-MS and ESI-MS/MS product profiles, by which the bis(bibenzyl) type and the number of alkoxyl substituents can be identified. Isomers of bis(bibenzyls) can be differentiated to some extent, while the linkage sites of biphenyl ether bonds are difficult to identify. The structure-fragmentation relationships will facilitate the characterization of other bis(bibenzyls) and this will be of value for the high-throughput screening of novel bis(bibenzyls) in bryophytes.

  3. 新疆阿尔泰山苔藓植物生态特征及研究意义%Ecological Characteristics and Research Significance of Bryophytes in the Altai Mountain

    Institute of Scientific and Technical Information of China (English)

    买买提明·苏来曼; 帕孜来提·拜合提; 王建民; 王德萍; 努尔巴依·阿布都沙力克

    2011-01-01

    Based on the investigation of the bryophytes into the Kanas Natural Reserve in the Altai Mountain,274 bryophtes species belongs to 130 genus,51 families and their characteristics were analysed and their ecological types and vertical distribution were discussed in this paper.It is concluded from the study that growth substrate and ecological water condition were the main factors effecting the distribution patterns of bryophytes,and we think it is of great significance to the study of bryophyte in Xinjiang, especially in bryophyte biodiversity, ecological protection and feasible approaches to the protection.%本文通过新疆阿尔泰山代表地区喀纳斯自然保护区苔藓植物调查,分析苔藓植物的物种组成特点,讨论该区苔藓植物的生态类型和苔藓植物的垂直分布,得出基质类型和水分生态因子是影响苔藓分布的主要因素,提出苔藓植物多样性和生态保护的意义,探求可行的保护途径.

  4. Progress and Application of Bryophyte Fossils Study%苔藓植物化石的研究进展及应用

    Institute of Scientific and Technical Information of China (English)

    寇瑾; 白学良; 冯超; 福英; 张乐

    2012-01-01

    Bryophyte fossils provide very important scientific foundation to explore plant kingdom evolution and to reconstruct the ancient climatic environment. Here,through a lot of fossil materials,combining with nowadays advanced science technology and hot issues, we get these conclusions: (1)Bryophyte originated from the equator low latitude region of early Palaeozoic Era. The differentiation between mosses and liverworts took place in Ordovician period or even earlier. The trend of bryophyte diversity is increasing in the whole picture,and it is higher in the equator low latitude region, but the diversity of mosses is obviously different from liverworts diversity in individual geological,highlights. They have different sensitivity to the paleoclimate environment. (2)Both morphological and molecular evolution of bryophyte is slow, but to mosses,liverworts evolution is relatively faster. (3)For the changes and reconstruction of paleoclimate environment, the morphological characteristics, palynology studies, ancient molecular fossil analyses, and the isotope measure of C or O,all provide important scientific bases. Based on the above issues, constructive suggestions and views to the problems of these bryophyte fossil studies were provided.%苔藓植物化石为探索植物界物种进化发展和重建古气候环境提供了重要的科学基础.该文通过大量的化石资料,结合当今前沿科学技术和热点问题,从苔藓植物起源分化及物种多样性分布、形态表现及分子进化及古气候环境的重建等方面对该领域的研究成果进行了综述和总结.(1)苔藓植物起源于早古生代的赤道低纬度区,至少在奥陶纪时期就有了苔类与藓类的分化;其物种多样性总体上呈增加趋势,并具有低纬度区物种多样性高的特点,但个别地质年代苔类与藓类的物种多样性具有明显差异,凸显了二者对气候环境的敏感程度不同.(2)苔藓植物具有缓慢的形

  5. 贵州早-中寒武世凯里组类似苔藓植物化石%Bryophyte-like Fossil (Parafunaria sinensis) from Early-Middle Cambrian Kaili Formation in Guizhou Province,China

    Institute of Scientific and Technical Information of China (English)

    杨瑞东; 毛家仁; 张位华; 姜立君; 高慧

    2004-01-01

    Abundant well-preserved animal and macroalgal fossils were discovered in the Early-Middle Cambrian Kaili Formation of Taijiang County, Guizhou Province, China, which constitute the Kaili Biota,named as one of the three important Burgess Shale-type faunas. The bryophyte-like fossil (Parafunaria sinensis Yang gen. et sp. nov) was discovered in the horizon of occurrence of Macroalgal fossils. The fossil of P. sinensis possesses typical characters of bryophyte, such as whorled leaves, capsule and seta, and complex rhizoid or foot. We infer that the bryophyte-like fossil could be the ancestor of bryophyte. The discovery provides a new lead for further study on the origin and evolution of bryophyte or land plant.%贵州台江早-中寒武世凯里组保存大量的生物化石,它构成了寒武纪重要的生物群之一--凯里生物群.在凯里生物群中保存有丰富的碳质薄膜藻类化石,新发现类似苔藓植物化石(Parafunaria sinensis Yang(gen.et sp.nov)),它具有藓类植物所拥有的典型的叶状体轮生现象、孢朔、孢朔柄和复杂的根系特征.推测它是藓类植物祖先,它为进一步研究藓类植物和陆生高等植物的起源和演化提供了新的线索.

  6. A study on bryophytes diversity in the main ecosystems in Changbai Mountain%长白山主要生态系统苔藓植物的多样性研究

    Institute of Scientific and Technical Information of China (English)

    曹同; 郭水良

    2000-01-01

    长白山地区共有苔藓植物65科179属437种,32个变种和亚种.其中,石生和岩面薄土生种类(saxicolous bryophyte)最丰富,其次为腐木生种类(saprophytic bryophyte)和树生种类(epiphytic bryophyte),再次为土生种类(soil and humus bryophyte).沼泽地、水体等生境中的种类(peat, marsh and water bryophyte) 相对较少.地面生苔藓植物的物种丰富度以暗针叶林(dark conifer forest)最高,而多样性以落叶松-沼泽地(Larix olgensis-bogs)和暗针叶林为最高;腐木生苔藓植物的物种丰富度和多样性均以暗针叶林为最高,树附生苔藓植物的物种丰富度和多样性以暗针叶林以及红松阔叶混交林(Pinus koraiensis broad-leaved mixed forest) 与暗针叶林间的过渡林为最高.定性分析表明,海拔高度、林冠层郁闭度和林内湿度、土壤酸度、含水量、林下倒木的丰富程度等可能是影响本地区苔藓植物多样性的重要环境因子.

  7. 苔藓植物matK基因PCR反应体系的建立和优化%Establishment and Optimization of matK gene-PCR Amplification System for Bryophytes

    Institute of Scientific and Technical Information of China (English)

    郑红建; 张安世

    2012-01-01

    [Objective] To establish and optimize the matK gene-PCR reaction system for Bryophytes. [ Method ] Using genomic DNA of Bryo-phytes extracted via an improved CTAB method, single factor analysis was performed to investigate the impacts of DNA template concentration, primer concentration, 2 x Taq MasterMix concentration on matK gene-PCR amplification and to optimize this system for Bryophytes. [Result] The matK gene-PCR amplification(10.0 μl) suitable for Bryophytes was determined to be composed of 0.5 μl DNA, 0.2 μl primer and 5.6 μl 2 × Taq MasterMix. [ Conclusion] The study laid basis for analyzing the molecular systematics of Bryophytes.%[目的]建立和优化适合于苔藓植物matK基因的PCR反应体系.[方法]以鳞叶藓为材料,利用改良CTAB法提取了基因组DNA,利用单因素试验分析了DNA模板、引物和2×Taq MasterMix的浓度对苔藓植物matK基因PCR反应的影响,对适合苔藓植物的matK基因PCR反应条件进行了优化.[结果]适合苔藓植物的matK基因PCR反应体系为10.0 μl,其中含DNA模板0.5μl,正反引物各0.2μl,2×Taq MasterMix 5.6 μl.[结论]为苔藓植物的分子系统学等研究奠定了基础.

  8. 广西那佐自然保护区苔藓植物的组成与区系%Species and Floristic Composition of Bryophytes in Nazuo Nature Reserve in Guangxi Province

    Institute of Scientific and Technical Information of China (English)

    贾鹏; 熊源新; 王美会; 徐力; 马建鹏; 赵智艳

    2011-01-01

    为了解广西那佐自然保护区内苔藓植物的组成情况,对保护区内的苔藓植物进行调查研究,分析保护区内苔藓植物的物种组成及区系组成.结果表明,保护区内苔藓丰富性较低,有苔藓植物31科58属115种(含亚、变种),优势科为灰藓科Hypnaceae、丛藓科Pottiaceae、青藓科Brachytheciaceae和羽藓科Thuidiaceae,占优势的属为灰藓属Hypnum、曲柄藓属Campylopus、凤尾藓属Fissidens等;区系分析中温带与热带所占有的比例相当,说明该地苔藓植物具有温带向热带过渡分布的趋势.%Results from investigation of species and floristic composition of bryophytes in Nazuo Nature Reserve in Guangxi province showed that the bryophyte richness is low and there are 115 bryophytes species belonging to 58 genera and 31 families in Nazuo Nature Reserve in Guangxi province.The dominant families are Hypnaceae, Pottiaceae, Brachytheciaceae and Thuidiaceae. The dominant genera are Hypnum, Campylopus, Fissidens and so on. The proportion of bryophytes with temperate features is almost equal to that with tropical features, which indicate that distribution of bryophytes in Nazuo Nature Reserve have the trend of transition from temperate zone to tropical zone.

  9. Small-scale hydropower plants and rare bryophytes and lichens. Knowledge and lack of knowledge; Smaakraftverk og sjeldne moser og lav. Kunnskap og kunnskapsmangler

    Energy Technology Data Exchange (ETDEWEB)

    Evju, Marianne; Hassel, Kristian; Hagen, Dagmar; Erikstad, Lars

    2011-08-15

    There is a large and increasing interest for the development of small-scale hydropower in Norway. Small-scale hydropower plants may impact the biological diversity negatively through destruction, degradation or fragmentation of habitats. Both the environmental investigations and the treatment of applications for small-scale hydropower plants put a great emphasis on red listed species, and in particular on red-listed bryophytes and lichens growing in stream ravines and in meadows and rock faces influenced by waterfalls. Bryophytes and lichens can be difficult to identify in the field, and knowledge of the species' ecology, distribution and population sizes is insufficient. A large review of environmental investigations of small-scale hydropower plants, documented that red-listed lichens were rarely recorded, and red-listed bryophytes were never recorded. In this report, we try to make visible the knowledge we have and the knowledge we lack of red listed bryophytes and lichens in areas in which the development of small-scale hydropower is relevant. Most focus is placed on bryophytes. The report is mainly a collation of existing knowledge. There is a great variation among stream ravines in the occurrence of species. Several factors, such as stability of moisture conditions, tree species composition and bedrock, interact to affect the occurrence of species. Red-listed bryophytes and lichens occur both in the forest and in affiliation with the stream. A reduction of local moisture, through e.g. logging of forest close to the stream or reduction of the water flow, will probably affect the species negatively. River regulation will change the frequency of flooding and affect the ice drift in the stream, which may negatively affect species living on dead wood in or close to the stream. Several species are vulnerable to deteriorated habitat quality and habitat fragmentation as their habitat requirements are narrow and their dispersal capacity is limited. However, we

  10. Influence of sample size on bryophyte ecological indices%样方大小对苔藓植物生态学指标的影响

    Institute of Scientific and Technical Information of China (English)

    沈蕾; 郭水良; 宋洪涛; 娄玉霞; 曹同

    2011-01-01

    为了分析样方大小对苔藓植物生态指标的影响,在环境相对一致的条件下,在各样点以巢式取样法调查苔藓植物盖度,取样的大小分别为20 cm× 20 cm,30 cm× 30 cm,40 cm×40 cm,50 cm× 50 cm,60 cm×60 cm.通过统计发现,随着取样面积的增加,目测法所获得的优势种、总的苔藓植物的盖度呈现下降趋势,但是非优势种和偶见种的盖度却有上升趋势;随着样方大小之间差异的扩大,所得调查数据间的差异也在扩大;随着取样面积的增加,样方中苔藓植物的多样性指数、生态位宽度和重叠值、苔藓植物的平均种数均符合饱和曲线的增加规律;取样面积大小对环境因子与苔藓植物分布之间关系的分析结果也有明显影响;在生境相对一致的土生环境下,苔藓植物的取样面积可考虑在40 cm×40 cm~50 cm× 50 cm的范围内.%In order to analyze the influences of sample sizes on byophyte ecological indices, plots were located using systematic sampling method under the similar ecological conditions,and the coverage of bryophytes were investigated by nested sampling method,the size of samples were 20 cm×20 cm,30 cm×30 cm,40 cm×40 cm,50 cm×50 cm and 60 cm× 60 cm, respectively. A total of 73 plots including 365 samples were surveyed in the present study. Bryophyrte coverages at each quadrat were recorded by vision estimation. Data analyses showed that the diversity indices,niche width and overlap,average species number of bryophyte per sample increased with the enlargement of sample size. Sampling size also affected the relationship between enviornmental varialbes and bryophyte distribution. In sites with relatively homogeneous habitats, sampling area for bryophyte communities could be considered from 40 cm× 40 cm to 50 cm× 50 cm.

  11. Species Diversity of Bryophytes in Hongfeng Lake%红枫湖苔藓植物的物种多样性

    Institute of Scientific and Technical Information of China (English)

    刘良淑; 熊源新; 夏欣; 钟世梅; 崔再宁

    2015-01-01

    An investigation about bryophytes of four islands in Hongfeng lake was made in order to lay the foundation for bryophutes’protection,water conservation and environmental monitoring.Species diversity was studied by means of species similarity coefficient,important valve and species diversity index.The result showed that there were 107 species of bryophytes that belonged to 34 genera and 18 families.The dominant families were Pottiaceae,Brachytheciaceae and Thuidiaceae and the dominant species were Hypnum leptothallum ,Haplocladium strictulum and Thuidium kanedae .The magnitude of Dahl index,Shannon index and Simpson index in four islands was consistent:YYD1 > XLBD > YJP>YYD2.The species diversity of YYD1 was the highest one (0.913 7)of all islands,while YYD2 wasthe lowest(0.704 4).The species similarities between YYD1 and YYD2 were the highest(0.327 9),while the species similarities between XLBD and YYD2 were the lowest(0.111 1).The Dahl index,Shannon index and Simpson index of different habitats ranked:soil> rock>soil and rock mixed>tree≥rotten wood.The habitat conditions played an important role in bryophytes,which was the richest in soil and rock habitat, the lowest in rotten wood.The biodiversity of bryophytes was closely related with the island area, moisture,soil,matrix,habitat and so on.%为苔藓植物的保护提供本底资料,并为红枫湖地区水源涵养、水土保持和环境污染检测提供理论依据,采用相似性系数、重要值和多样性指数等对红枫湖4个岛屿的苔藓植物物种多样性进行调查研究。结果表明:红枫湖苔藓植物共有18科34属107种,优势科为丛藓科、青藓科和羽藓科,美灰藓、东亚小羽藓和短肋羽藓为优势种。4个岛屿苔藓植物的 Dahl 指数、Shannon 指数和 Simpson 指数均表现为鸳鸯岛1>兴隆半岛>野鸡坡>鸳鸯岛2,鸳鸯岛1的多样性指数最高,为0.9137;鸳鸯岛2的多样性指数最低,为0.7044。苔藓植

  12. 杭州西溪湿地苔藓植物种类与群落调查%Investigation on Species and Communities of Bryophytes in Xixi Wetlands, Hangzhou

    Institute of Scientific and Technical Information of China (English)

    季梦成; 缪丽华; 蒋跃平; 郑钢

    2015-01-01

    在野外调查、采集和标本检视基础上,记录杭州市西溪湿地苔藓植物33科48属58种1亚种1变种.其中,树生赤藓(Syntrichia laevipila)为浙江省分布新记录.该湿地苔藓植物种类丰富度及特有性较低,含5种的科只有齿萼苔科(Lophocoleaceae)和丛藓科(Pottiaceae),占总科数的6.1%;仅1种的科共18科,如缩叶藓科(Ptychomitriaceae)、牛毛藓科(Ditrichaceae)、珠藓科(Bartramiaceae)、木灵藓科(Orthotrichaceae)、疣冠苔科(Aytoniaceae)等,占总科数的54.5%.在苔藓群落中,土生苔藓群落占优势,而且土生苔藓群落的物种多样性也最丰富,其他依次为石生群落、木生群落、水生群落.生活型统计显示,交织型与丛集型占绝对优势,合计53种,占总种数的83.33%;漂浮型和悬垂型都只有2种,分别占总种数1.67%,基本不代表该区苔藓植物生活型特征.%Based on the field investigation and specimen examination,a total of 60 bryophytes species (including subspecies and varieties),belonging to 48 genera and 33 families were reported in Xixi wetlands of Hangzhou City.Syntrichia laevipila was considered as a new distribution record for Zhejiang Province.Diversity and endemic element of bryophytes was low in the study area.Lophocoleaceae and Pottiaceae both consisted of 5 species and accounted for 6.1% of all families.The 18 families (54.5% in total) including Ptychomitriaceae,Ditrichaceae,Bartramiaceae,Orthotrichaceae,Aytoniaceae etc.,only 1 genus was reported respectively in Xixi Wetlands.These bryophyte communities were grouped into 5 types:Bryo-Hydrophytia,Bryo-Geophytia,Bryo-Petrophytia and Bryo-Epixylophytia,among which Bryo-Geophytia was the dominant type.Statistical results indicated that wefts and turfs were most common bryophyte life forms.The 53 species belonged to the above two life forms,accounting for 83.33% of total species number;float ages and pendants had both 2 species which respectively contributed to 1.67

  13. 黄山部分药用苔藓植物资源调查%Survey on Partial Resources of Medicinal Bryophytes in Mount Huangshan of Anhui Province

    Institute of Scientific and Technical Information of China (English)

    吴明开; 师雪芹

    2011-01-01

    黄山地区药用苔藓植物资源丰富,种类多,分布广,蕴藏量较大,对其中的19种药用苔藓植物生境分布、药用功效作了初步调查,结果表明:鳞叶藓[Taxiphyllum taxirameum (Mitt.)Fleisch.]、金发藓(Polytrichum commune Hedw.)、东亚小金发藓[Pogonatum inflexum(Lindb.)Lac.]、大灰藓(Hypnum plumaeforme Wils.)、细叶小羽藓[Haplocladium microphyllum (Hedw.)Broth.]、大羽藓[Thuidium cymbifolium(Doz.et Molk.)B.S.G.]、匍灯藓[Plagiomnium cuspidatum(Hedw.)T.Kop.]、真藓(Bryum argenteum Hedw.)、葫芦藓(Funaria hygrometrica Hedw.)、黄牛毛藓[Ditrichum pallidum(Hedw.)Hampe]和地钱(Marchantia polymorpha L.)等蕴藏量较大,可供开发利用.%The resources of medicinal bryophytes in Huangshan Mountain are abundant with various species, wide distribution and plentiful re-serves. The distribution district and medicinal efficacies of nineteen species of medicinal bryophytes were investigated, and the results showed that: Taxiphyllum taxirameum (Mitt.) Fleisch. , Polytrichum commune Hedw), Pogonatum in flexum (Lindb.) Lac. , Hypnum plumaeforme Wils. , Haplocladium microphyllum ( Hedw. ) Broth. , Thuidium cymbifolium ( Doz. et Molk. ) B. S. G. , Plagiomnium cuspidatum ( Hedw. )T. Kop. , Bryum argenteum Hedw. , Funaria hygrometrica Hedw. , Ditrichum pallidum ( Hedw. ) Hampe and Marchantia polymorpha L. distributed in Mount Huangshan with vast reserves, which are capable of meeting the development.

  14. Improvement of boreal vegetation modelling and climate interactions through the introduction of new bryophyte and artic-shrub plant functional types in a land surface model.

    Science.gov (United States)

    Druel, Arsène; Krinner, Gerhard; Peylin, Philippe; Ciais, Philippe; Viovy, Nicolas; Peregon, Anna

    2016-04-01

    Boreal and tundra vegetation, which represents 22% of the global land area, has had a significant impact on climate through changes of albedo, snow cover, soil thermal dynamics, etc. However, it is frequently poorly represented in earth system models used for climate predictions. We improved the description of high-latitude vegetation and its interactions with the environment in the ORCHIDEE land surface model by creating new plant functional types with specific biogeochemical and biophysical properties: boreal shrubs, bryophytes (mosses and lichens) and boreal C3 grasses. The introduction of shrub specificities allows for an intermediate stratum between trees and grasses, with a new carbon allometry within the plant, inducing new interactions between wooden species and their environment, especially the complex snow-shrubs interaction. Similarly, the introduction of non-vascular plants (i.e. bryophytes) involves numerous changes both in physical and biological processes, such as the response of photosynthesis to surface humidity, the decomposition of carbon and the soil thermal conductivity. These changes in turn lead to new processes and interactions between vegetation and moisture (soil and air), carbon cycle, energy balance, etc. For the boreal C3 grasses we did not include new processes compared to the generic C3 grass PFT, but improved the realism of the carbon and water budgets with new boreal adjusted parameters. We assess the performance of the modified ORCHIDEE land surface model and in particular its ability to represent the new plant types (their phenology etc.), and evaluate the effects of these new PFTs on the simulated energy, water and carbon balances of boreal ecosystems. The potential impact of these refinements on future climate simulations will be discussed.

  15. 科尔沁沙地松树山地区苔藓植物物种多样性与分布特征分析%Species Diversity and Distribution of Bryophytes in Songshushan Region of Horqin Sandy Land

    Institute of Scientific and Technical Information of China (English)

    田桂泉; 王子文

    2011-01-01

    通过标本采集和群落调查,探明科尔沁沙地松树山地区有苔藓植物76种(包括变种和亚种),可归为苔类(9种)和藓类(67种)两个大的类群,隶属于21科、41属;可划分为7种区系地理成分,以北温带成分、世界广布种和东亚成分为主要区系成分,分别有48种、12种和8种。石缝土层、岩面、树干小生境苔藓植物群落丰富,少数物种局限分布在一种小生境中,多数物种同时分布在两种以上小生境中。维管植物群落共有地面生苔藓植物39种,优势种有双色真藓(Bryum dichotomum)、土生对齿藓(Didymodon vinealis)、小疣冠苔(Mannia triandra)、西伯利亚疣冠苔(Mannia sibirica)、褶叶青藓(Brachythecium salebrosum)。随着水分条件改善,地面苔藓植物群落优势种构成发生有规律地变化,顶蒴藓类→顶蒴藓类+叶状体苔类→叶状体苔类+顶蒴藓类→侧蒴藓类+叶状体苔类+顶蒴藓类。认识群落随水分条件变化的特征对从更大尺度上认识苔藓植物结皮层形成和维持有重要参考价值。%Based on quadrat and community investigation in 2006 and 2008,76 species(including subspecies and varieties) of bryophytes were discovered in Songshushan region in Horqin Sandy Land,which can be classified into 2 taxonomical groups,namely liverwort(9 species) and mosses(67 species).These species are attached to 21 families and 41 genera,and can be categorized into 7 flora types,the majority of which are attached to North Temperate flora(48 species),Cosmopolitan flora(12 species),and East Asia flora(8 species).Many bryophyte species are distributed in the microhabitat such as stone crack soil,rock surface and trunk,among which most bryophyte species adapt to two or more than two kinds of microhabitat,only few to one kind of microhabitat.Thirty-nine species of the epigaeous bryophytes are discovered in different vascular plant community

  16. The diversity and distribution characteristics of medicinal bryophytes in Fanjingshan national nature reserve%梵净山药用苔藓植物多样性及分布特点

    Institute of Scientific and Technical Information of China (English)

    石磊; 杨传东; 熊源新; 杨妮; 张弘; 杨华江; 杨宁

    2016-01-01

    2010年,梵净山国家级自然保护区管理局对保护区进行第二次本底资源调查,结果显示:梵净山的药用植物2086种(含变种),其中药用苔藓植物17科23属32种。同时对这些药用苔藓植物的生境、药用功效及分布特点进行了归纳整理,并结合梵净山药用苔藓植物的可利用现状,提出了相应的保护利用措施。%The result of the second bottom Resource Survey conducted by Fanjingshan National Nature Reserve Administrator in 2010 showed,the number of medicinal plants were 2 086 species( including varieties),and there were 17 families,23 genera,32 species medicinal bryophytes. At the same time, we summed up the medicinal bryophytes habitat,and distribution of the medicinal effect and combined with Fanjingshan medicinal bryophytes utilization situation,put forward the corresponding measures of protection.

  17. 苔藓监测空气重金属污染技术的研究进展%Research Advances in Bryophyte Monitoring Technology to Heavy Metal Pollution in the Atmosphere

    Institute of Scientific and Technical Information of China (English)

    王爱霞; 方炎明

    2011-01-01

    苔藓是最敏感的大气污染指示植物之一,利用其可识别污染源,揭示大气重金属沉降随时间的变化规律及污染的时空变化格局,进而评价某地区的环境状况.从国内外发展概况入手,综述苔藓植物对大气重金属污染指示作用的研究进展.%Bryophyte is a group of the most sensitive indicator plants for air pollution monitoring. The application of bryophyte could help identify the pollution sources, indicate the deposition role of heavy metal pollution in the atmosphere and reflect the temporal and spatial change of the heavy metal pollution in the atmosphere. Based on the generalization of relevant researches both at home and in the world, this article summarized the studies on the indicating function of bryophyte to monitor heavy metal pollution in the atmosphere.

  18. Advances in Studies on Chemical Constituents and Antimicrobial Activity of Bryophytes%苔藓植物化学成分及抑菌作用的研究进展

    Institute of Scientific and Technical Information of China (English)

    余治锦; 姜山

    2012-01-01

    苔藓植物是没有维管束的陆生植物,分为藓纲、苔纲和角苔纲3类。近年来的研究表明,苔藓植物能产生萜类、黄酮类及联苄类等生物活性物质,其中许多对病原真菌和细菌具有良好的抑制作用,是天然抗菌药物的重要来源。本文主要介绍苔藓植物的化学组成及其抑菌作用的研究情况。%Including Musci, Hepaticae and Anthocerotae, bryophytes are members of the land plants without vascular. Bryophytes can produce a great variety of bioactive compounds such as terpenoids, flavonoids and bibenzyls, some of which have obviously antifungal and antibacterial activities and are vital sources of naturally antimicrobial drugs. Chemical constituents of bryophyte and its antimicrobial activity are summarized and discussed in this paper.

  19. Bryophyte Communities from Abandoned Mercury Mine in Eastern Guizhou Province%废弃汞矿山苔藓植物群落生态研究

    Institute of Scientific and Technical Information of China (English)

    潘莎; 张朝晖

    2011-01-01

    对贵州省铜仁市云场坪镇废弃汞矿山的苔藓植物群落进行了研究,通过野外全面调查和实验室仔细鉴定,发现废弃汞矿山苔藓植物群落的种类组成有13科52属62种(苔类植物2科2属2种,藓类植物11科50属60种).应用双向指示种分析法(TWINSPAN)和除趋势对应分析(DCA)分析其分布格局表明,该区12个样点分为2个类型组,组1为废石、废渣样地,组2为废洞样地,说明废洞与废石、废渣生境差异性较大,忿函、废渣生境较相似;北地扭口藓群落(Barbula fallax Com.)、阔叶小石藓群落(Weisia planifolia Corn.)、尖叶扭口藓群落(Barbula conystricta Com.)、拟丛净口藓群落(Gymnostomum anoectangioides Com.)、硬叶净口藓群落(Gymnostomum subrigidulumCom.)为该矿区废石、废渣上的优势群落,其生物量为55.20 -448.20 g·m-,,饱和吸水量为260.80-3 599.40 g-m-2,说明在矿区这种干旱且保水能力弱的环境区域,苔藓植物群落以其特有的生态功能在矿区生态环境治理中具有十分重要的作用.%The bryophyte communities were investigated in abandoned mercury mine of Yunchangping town,Guizhou province. Based on the extensive investigation and identification of the bryophyte specimens, 62 taxa in 52 genera of 13 families were found (2 species in 2 genera of 2 families are Hepaticae, 60 taxa in 50 genera of 11 families are Musci). Two-way Indicator Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA) were used to analyze their distribution patterns. The results showed that 12 sampling plots could be classified into two groups. Group 1 contained waste rock sampling plots and waste solid sampling plots, group 2 contained abandoned mercury mine caves, which indicated the habitats of abandoned mercury mine caves are different from waste rock and waste solid, the habitats of waste rock and waste solid are similar. The dominant communities are Barbula fallax Com. , Weisia planifolia Com. , Barbula

  20. Effect of Habitat Fragmentation on Bryophytes Diversity in the Thousand-Island Lake Region%千岛湖生境片断化对苔藓植物多样性的影响

    Institute of Scientific and Technical Information of China (English)

    王莹莹; 王幼芳; 汪岱华; 李敏; 左勤

    2011-01-01

    Based on an investigation of bryophytes on ten islands and one peninsula of the southeastern sub-region of the Thousand-Island Lake,the composition of bryophytes and the effects of habitat fragmentation on their diversity were studied. The results showed 129 species belonging to 71 genera and 37 families, among which 3 species were new to Zhejiang province. Geophytia, petrophytia and epixylophytia were dominant bryophyte communities. The bryoflora of the Thousand-Island Lake was characterized by East Asia elements represented by 39.45% of the entire species,followed by North Temperate elements and Tropical Asia elements which accounted for 20.18% and 18.35% .respectively. The distribution of 58 bryophyte species was affected by island area, while 29 species was unaffected. The relationship between island size and bryophyte richness showed a positive correlation.%选取浙江千岛湖东南湖区的10个岛屿和1个半岛,详细研究了苔藓植物组成及生境片断化对其多样性的影响.研究结果表明:该区域有苔藓植物37科71属129种,其中浙江新记录3种.群落类型主要包括土生群落、石生群落和树生群落.苔藓植物区系以东亚成分为主,其次为北温带成分和热带亚洲分布,分别占总种数的39.45%、20.18%和18.35%,说明该地区苔藓植物区系具有典型的东亚特征.岛屿面积对苔藓植物分布影响结果显示:不受岛屿面积影响的苔藓植物有29种,受岛屿面积影响的苔藓植物有58种;各岛屿苔藓植物物种数与岛屿累加面积存在明显正相关.

  1. 黔金丝猴活动区苔藓植物多样性研究%Studies on the diversity of bryophytes in the activity areas of Guizhou snub-nosed monkey

    Institute of Scientific and Technical Information of China (English)

    石磊; 牛克锋; 杨业勤; 杨传东; 熊源新

    2011-01-01

    Bryophytes diversity was studied at Yangaoping in the northeast of Fanjingshan National Nature Reserve. The results indicated that there were 46 families,85 genera.and 249 species (including the following categories units) of bryophytes,five species were new to Guizhou in this aera where Guizhou snub-nosed monkeys occur very frequently. The component with flora of temperate zone was the most abundant and accounted for 43. 32%, the bryophytes diversity in different altitude showed obvious differences,the broadleaved forest and evergreen mixed forest at higher altitude had more bryophytes than the bamboo forest at lower altitude. The altitude zone between 1200 m and 1800 m is used most frequently by Guizhou snub-nosed monkey. The bryophytes biodiversity also reflected that the stage of the elevation habitat was the most appropriate activity area of Guizhou snub-nosed monkey.%通过对梵净山东北部岩高坪区域苔藓植物以及对黔金丝猴活动区生境的研究,报道了黔金丝猴活动区苔藓植物46科,85属,249种(含种以下分类单位),其中贵州新记录种5个.从该区苔藓植物的组成看,温带区系成分最为丰富,占整个区系成分的43.32%;不同海拔的森林植被下苔藓植物的分布有明显的差异:阔叶林的苔藓植物多样性最高,竹林内苔藓植物多样性较低.在黔金丝猴活动最为频繁的海拔1 200~1 800 m范围内,苔藓植物的多样性也反映着该海拔阶段的生境是黔金丝猴最适宜的活动区.

  2. Investigation on Bryophyte Resource in Qinyang Nature Reserve in Dushan County of Guizhou Province%贵州独山县琴阳自然保护区苔藓植物资源的调查

    Institute of Scientific and Technical Information of China (English)

    韩敏敏; 熊源新; 孙中文; 杨冰; 杨林

    2012-01-01

    To enrich the bryophyte resource in Guizhou Province and provide the theoretical basis for this region to protect the bryophyte biodiversity, 407 bryophyte specimens from Qinyang Nature Reserve were collected and carefully identified. It was found that there were 204 species (including subspecies and variation) which belonged to 81 genera in 38 families. And five of them were newly recorded in Guizhou. According to the checklist, There were ten dominant families(Porellaceae, Frullaniaceae, Lejeuneaceae, Marchantiaceae, Pottiaceae, Thuidiaceae, Hypnaceae, Meteoriaceae, Neckeraceae and Brachytheciaceae) and nine dominant genera ( Porella, Frullania, Lejeunea, Marchantia, Thuidium, Plagiomnium, Brachythecium, Fissidens and Fissidens). The geographical distribution of various families and genera showed that the bryophytes in Qinyang Nature Reserve not only had temperate components, but also tropic and subtropical components. The bryophyte were all distributed on the centre transition zone from temperate zone to tropic zone no matter at which level of dominant families, genera or species.%为丰富贵州苔藓植物资料,并为该地区的苔藓植物生物多样性保护提供理论依据,对贵州琴阳自然保护区407份苔藓植物标本进行了整理和鉴定.结果表明:该地区苔藓植物共有38科81属204种(包括亚种和变种),其中,有5个贵州新纪录种;优势科10个,分别为光萼苔科、耳叶苔科、细鳞苔科、地钱科、丛藓科、羽藓科、灰藓科、蔓藓科、平藓科和青藓科;优势属9个,分别为光萼苔属、耳叶苔属、细鳞苔属、地钱属、羽藓属、匐灯藓属、青藓属、凤尾藓属和绢藓属.根据各科、属的地理分布状况可知,琴阳自然保护区苔藓植物既有温带成分,又有热带和亚热带成分,在优势科、属、种水平上,该地区苔藓植物都处于由温带向热带过渡的中心带上.

  3. Briófitas da caatinga 1: Estação Experimental do IPA, Caruaru - PE Bryophyte of caatinga 1: experimental station at the IPA, Caruaru - PE

    Directory of Open Access Journals (Sweden)

    Kátia Cavalcanti Pôrto

    1994-07-01

    Full Text Available Foi realizado o levantamento da brioflora de uma caatinga arbórea pertencente a Estação Experimental da Empresa Pernambucana de Pesquisas Agropecuárias (IPA, situada no município de Caruaru (8º08'00"-8º10'00"S, 36º02'00"-36º 10'00"W, Pernambuco. A área estudada compreende 20ha, tem altitude aproximada de 550m e médias anuais de precipitação e temperatura de 671 mm e 23ºC, respectivamente. As coletas foram realizadas durante as estações de estiagem (out-nov/1990 e chuvosa (mai-jun/1991, tendo sido investigados os seguintes substratos: solo, rocha, caules vivos e em decomposição. Registraram-se 16 espécies de briófitas, sendo 14 Bryopsida e 2 Hepaticopsida. Bryaceae e Fissidentaceae foram as famílias de maior representatividade específica na área. A maioria das coletas indicou a predominância de espécies terrícolas e saxícolas, seguindo-se as corticícolas e as epíxilas. O trabalho contém informações sobre distribuição geográfica e aspectos ecológicos das espécies.A floristic survey of bryophyte was carried out in a experimental station at the Empresa Pernambucana de Pesquisa Agropecuária at Caruaru (Lat. 8º08'00"-8º10'00"S; Long. 36º02'00"-36º10,00"W, Pernambuco State. This area has 20ha, an altitude of 550m, an annual rainfall average of 671mm and 23ºC of temperature. The bryophytes were collected during the dry season (oct-nov/1990 and the rain season (may-jui/1991, on the following substrata: soil, rocks, living and dead trunks. There were identified 16 species, 14 Bryopsida and 2 Hepaticopsida. Bryaceae and Fissidentaceae were the most rich families in number of species. In the studied area, the terricolous species were predominant followed by saxicolous, corticolous and the species of decaying wood. Geographical distribution and ecological informations about the species were included.

  4. Briófitas do Parque Nacional da Restinga de Jurubatiba, RJ, Brasil Bryophytes of Restinga de Jurubatiba National Park, Rio de Janeiro State, Brazil

    Directory of Open Access Journals (Sweden)

    Caio Amitrano de Alencar Imbassahy

    2009-06-01

    Full Text Available Este trabalho representa uma síntese do conhecimento florístico de briófitas do Parque Nacional da Restinga de Jurubatiba, com resultados de campo, material de herbário e publicações. Foram registrados 61 táxons de briófitas, pertencentes a 15 famílias e 33 gêneros. Para cada táxon foram analisados a distribuição geográfica, o tipo de substrato e a forma de vida. A família predominante foi Lejeuneaceae (25 espécies, seguida de Jubulaceae (sete, Calymperaceae (quatro e Sphagnaceae (quatro. Entre as espécies, predominaram as de distribuição Neotropical (35%. Com relação ao substrato preferencial, a maior parte dos táxons é corticícola. A forma de vida predominante foi o tapete, seguido pelo tufo e a trama. O Parque possui brioflora bastante representativa no que diz respeito à vegetação de restinga, com 45% dos táxons de briófitas conhecidas para as restingas no Brasil e 82% das conhecidas para as restingas do estado do Rio de Janeiro. É apresentada uma chave para identificação das espécies.We present a synthesis of the bryophyte flora in Restinga de Jurubatiba National Park, based on field work, herbaria material and bibliography. Sixty one taxa were recorded, in 15 families and 33 genera. For each taxa, we analyze geographic distribution, substrata and life form. The most species-rich family was Lejeuneaceae (25 species, followed by Jubulaceae (seven, Calymperaceae (four and Sphagnaceae (four. Most taxa have a Neotropical (35% distribution, and most taxa prefer the corticicolous substrate. Mat was the most common life form. The bryoflora of this National Park is an important reservoir of bryophyte diversity in the restingas, with 45% of the taxa known from the sandy coastal plains of Brazil and 82% known from the this habitat in Rio de Janeiro state. A key to identification of the species is given.

  5. 江西官山2种苔藓植物叶片氮磷化学计量学特征%The leaf nitrogen:phosphorus stoichiometry of two bryophyte species in Guanshan Mountain, Jiangxi Province

    Institute of Scientific and Technical Information of China (English)

    陈昕; 欧阳明; 黄兰; 徐佳文; 林国江; 杨清培

    2015-01-01

    Nitrogen (N) and Phosphorus (P) stoichiometry is crucial to plant growth, development and adaptive capacity. Bryophytes belong to ancient plant groups, can adapt to the change of the natural environment for a long time. However, The leaf N and P stoichiometry and adaptation mechanism for bryophytes are still unclear. In this study, two typical bryophytes (Marchantia polymorpha, Hypnum plumaeforme) and two kinds of angiosperms (Rubus buergeri, Schima superba) which as a control were selected in Guanshan National Nature Reserve, Jiangxi province, then comparatively analyzed the leaf N and P content, leaf N:P and coefficients of variation and so on. Results showed that: (1) Bryophytes leaf P average content was 2.58 mg/g, significantly higher than that was 1.97 mg/g in two angiosperms, while leaf N:P average was 5.99, obviously lower than 8.35 of angiosperms. (2) The variation range was great of leaf N, P and N:P in bryophytes, whose variation coefficients were 18.94%, 22.05%and 18.52%, respectively were higher than 13.16%, 10.69%, and 13.00% of angiosperms. Above results indicated that bryophytes owned high P content, low N:P and had strong plasticity, we suggest that the ecological adaptation and environmental transformation function of bryophyte should be continue to study in depth.%氮(N)、磷(P)化学计量学特征对植物的生长发育及适应能力至关重要,苔藓植物属古老的植物类群,能够长期适应自然环境的变化,但其氮磷化学计量学特征及适应机制尚不清楚. 本文在江西省官山国家级自然保护区选择2种典型苔藓植物地钱(Marchantia polymorpha) 和大灰藓(Hypnum plumaeforme), 并以2种被子植物寒莓(Rubus buergeri)和木荷(Schima superb)为对照,比较分析了叶片的N、P含量、N:P和变异系数等指标. 结果表明:(1)与2种被子植物相比,苔藓植物P含量较高,N:P较低,其叶片P含量平均值为2.58 mg/g显著高于被子植物的1.97 mg/g,而其

  6. Study of Bryophytes in Indigenous Lead and Zinc Mining Waste Land in Bijie Area%毕节地区土法冶炼铅锌废弃地苔藓植物研究

    Institute of Scientific and Technical Information of China (English)

    江洪; 向良志

    2011-01-01

    [目的]为进一步研究毕节地区铅锌矿废弃地苔藓植物在废弃地的重金属修复的应用提供参考.[方法]对毕节地区铅锌矿废弃地苔藓植物进行全面调查、标本采集和初步鉴定,并与铜矿、金矿、汞矿区苔藓植物进行比较.[结果]铅锌矿废弃地有苔藓植物4科、14属、30种,有丛藓科和真藓科2个优势科.与铜矿、金矿、汞矿区苔藓植物相比,铅锌矿废弃地苔藓植物物种丰富度指数最低,为-0.958 0,种相似性指数也最低,为13.56%,铅锌矿废弃地苔藓植物生活型以矮丛集型为主.在4个矿区中,有5种广泛分布的苔藓植物种类,分别是北地扭口藓、双色真藓、银藓、卵蒴丝瓜藓、硬叶对齿藓.[结论]这些种类为进一步利用苔藓植物研究铅锌矿废弃地植被修复提供较好的材料.%[Objective] The research aimed to provide the reference for the application of the bryophytes in the vegetation restoration of the heavy metals in lead and zinc mining waste land in Bijie Area. [ Method] The comprehensive investigation, the collection, and the identification of the bryophyte in lead and zinc mining waste land in Bijie area were carried out. And the bryophytes in lead and zinc mining waste land were compared with those of copper mine, gold mine and mercury mine. [ Result] 30 mosses species in 14 genera of 4 families were reported at the region. There were two dominiant families that were pottiaceae and bryaceae in the region. And species richness of the bryophytes was the lowest in lead and zinc mining waste land, and it was -0. 958 0. The similarity coefficient of the species was the lowest, too. It was 13.56%. Short turfs was the dominant life-forms of the bryophytes in lead and zinc mining waste land. At the same time, there were 4 species of widespread bryophytes found in the four mine. They were Barbula fallax Hedw. , Bryum dichotomum Hedw. , Anomobryum filiforme ( dicks. ) husn. , Pohlia proligera ( kindb

  7. Effect of Stand Structure on Epiphytic Bryophytes in Guizhou Yushe National Forest Park%贵州玉舍国家森林公园林分结构对树附生苔藓的影响

    Institute of Scientific and Technical Information of China (English)

    杨再超; 谢斐; 林长松; 左经会; 向红; 廖雯

    2015-01-01

    Species of epiphytic bryophyte of three stands in Yushe National Forest Park were surveyed and the effect of stand structure on epiphytic bryophyte was studied by community diversity index and ordination method to further study the ecological system structure,function and ecological process of subtropical mountain forest and to provide the scientific basis for protection and management of forest resources in subtropical mountain area.The results showed that there are 18 epiphytic bryophytes (including 1 mutation).RDA reveals that the effect of tree density on epiphytic bryophyte community is higher than other factors,which can explain 71.7% of total variance.Stand type has the greatest impact on distribution of epiphytic bryophyte.The cover degree and diversity of epiphytic bryophyte is the highest and the lowest in conifer mixing forest at the tree level of different forest stand. Therefore, the management measures to keep complexity of stand structure and tree diversity are beneficial to protect diversity of epiphytic bryophyte according to different stands.%为深入研究亚热带山地森林生态系统结构、功能及生态过程,为亚热带山地森林资源的保护和管理提供科学依据,对玉舍国家森林公园3种林分树附生苔藓种类及相关因子进行调查和测定,并应用群落多样性特征指数和排序的方法研究林分结构对树附生苔藓的影响。结果表明:树附生苔藓种类有18种(含1变种);冗余分析(RDA)揭示树木密度对附生苔藓群落的影响超过其他因子,解释了总变量的71.7%;林分类型对附生苔藓的分布影响最大,在十齿花为优势群落的混合林中不同林分树木水平上树附生苔藓的盖度和多样性最高,而在针叶混合林中最低。因此,进行森林管理时,应注意对不同林分的选择管理,以维持林分结构复杂性和树种多样性,进而更好地保护树附生苔藓的多样性。

  8. Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

    Directory of Open Access Journals (Sweden)

    Aline Gonçalves de Freitas

    2015-06-01

    Full Text Available This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato; 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium are related to the modern flora found on the northern coast of Rio de Janeiro State, at the Restinga of Jurubatiba, from vegetation types such as shrub swamp/coastal swamp formation, seasonally flooded forest, Clusia and Ericaceae woods, and disturbed vegetation. The freshwater microalgae and the microfungi are also presently recorded from the coastal lagoons of this region. The high spore concentration in slope sediments reflects the intense terrigenous influx, caused by a relative low sealevel during glacial stages. Palynological analysis suggests the presence of taxa from flooded forests and humid areas in the coastal plain during glacial and interglacial stages of the Late Pleistocene.

  9. Bioindication of bryophytes to environmental quality of Jinan%苔藓植物对济南市环境质量生物指示的研究

    Institute of Scientific and Technical Information of China (English)

    任昭杰; 黄正莉; 李林; 赵遵田

    2011-01-01

    We investigated bryophyte from ten different sampling sites and made a comparison among their species. We altogether collected 365 specimens, which belonged to 62 species, 33 genera and 15 families. Gymnostomum calcareum, Weisia planifolia and Physcomitrium eurystomum were the prevalent species. They can serve as the primary plants for the ecological restoration of an industrial area.%选择了10个样点对济南市的苔藓植物进行了详细的调查研究,并对这10个样点的种类进行了比较分析.采集苔藓植物标本365份,经整理鉴定,发现济南苔藓植物群落的种类组成有15科33属62种(苔类植物2科2属2种,藓类植物13科31属60种).净口藓(Crymnostomum calcareum)、阔叶小石藓(Weisiaplanifolia)、红蒴立碗藓(Physcomitrium eurystomum)等为调查区的优势种类,可作为工业区生态修复进一步研究的素材.

  10. Bryophytes of Karst caves in Guilin area, China%中国桂林岩溶洞穴苔藓植物研究

    Institute of Scientific and Technical Information of China (English)

    张朝晖; 赵传海; 李晓娜; 彭涛; 黄文琥; 姜洪

    2005-01-01

    192 byophyte specimens were collected from 17 caves in the Guilin Karst area,Guangxi,China. 28 species in 18 genera and 13 families were listed with site,substrate,altitude,date,collectors. Among them,16 taxa are new records for Guangxi Autonomous Region. The fieldwork indicated the bryophytes grew within 0~32 m. distance with weak light from the cave entrance. Three turf species,including Gymnostonum calcareum Nees et Horsch.,G.recurvirostre Hedw. and Philonotis turneriana(Schwaegr.)Mitt. were associated with cave travertine deposition at thresholds.%对采自中国广西桂林17个岩溶洞穴的192份苔藓植物标本进行研究,报道了洞穴苔藓13科19属28种,其中含广西苔藓植物新记录16种.野外观察表明,桂林岩溶洞穴苔藓植物主要分布于洞穴洞口0~32 m弱光带范围内.三种丛集型藓类植物:净口藓、钩喙净口藓和东亚泽藓参与岩溶洞穴洞口带钙华沉积.

  11. 喀喇昆仑山—西昆仑山地区苔藓植物的生态地理分布特点%The Eco-geographical Distribution Pattern of Bryophytes from Karakorum-West Korum Area in Xinjiang

    Institute of Scientific and Technical Information of China (English)

    买买提明·苏来曼; 热西丹·尼格买提; 龚佐山; 艾克巴尔·阿布都拉

    2012-01-01

    喀喇昆仑山—昆仑山地区位于我国西北边疆,约为北纬33~39°、东经74~83°.是青藏高原西北隅及北部边缘的高山、高原区.作者于2008~2011年多次深入新疆喀喇昆仑山地区的叶城县,对苔藓植物进行详细的野外考察,采集标本3 000余份.经查阅有关资料和标本鉴定,确定新疆喀喇昆仑山共有苔藓植物32科、76属和178种(含5变种).其中苔类为7科、8属和11种,藓类25科、68属和167种,包括新疆苔类新记录2种,藓类新记录7种.根据野外调查,新疆喀喇昆仑山苔藓植物带可划分为山前荒漠草原苔藓植物带(1 870~3 200 m)、山地针叶林苔藓植物带(3 200 ~3 600 m)、亚高山灌丛草甸苔藓植物带(3 600~4000 m)、高山草甸苔藓植物带(4000~4500m)和高寒冻土苔藓植物带(4 500 ~5 000 m)5个苔藓分布带,其中山地针叶林苔藓植物带是苔藓植物分布最为丰富的地段.该山区的地理位置、植被类型、气候特点决定了苔藓植物垂直分布格局,而优越的水分条件是影响其分布的主要因素之一.%Karakorum-Westkorum area is located at the west of China between the latitudes 33~39 ° N and longitudes 74~83 ° E ,extending to the most northwestern part and northern fringe of Qinghai-Tibet plateau. Through the comprehensive field investigation of the bryophytes in Karakorum-West korum area during 2008 to 2011, we totally collected more than 3 thousand of specimens of bryophytes. After detailed examination, 32 families, 76 genera and 178 species (including 5 varieties) of bryophytes have been confirmed there. Among them, 7 families, 8 genera and 11 species are liverworts, and 25 families, 68 genera and 167 species are mosses. There are 9 newly recorded species(2 liverworts and 7 mosses) to Xinjiang. Based on field surveys, the vertical distribution pattern of bryophytes was divided into five parts: piedmont desert steppe zone with bryophytes (1 870~3 200 m), montane

  12. 重庆市不同功能区苔藓植物重金属含量及吸附特性研究%Heavy Metal Contents of Bryophytes and Their Adsorption Characteristics in Different Functional Zones of Chongqing

    Institute of Scientific and Technical Information of China (English)

    李进猛; 王定勇; 陈益; 刘超; 张迪男; 魏琴

    2012-01-01

    Bryophytes species in different functional zones of Chongqing were sampled to determine their heavy metal (Cu, Zn and Cd) contents, and several widely distributed species were selected to study their heavy metal adsorption characteristics. The results showed that the heavy metal contents in the bryophytes were different in different urban functional zones. The Cu, Zn and Cd contents in the industry zones were 2-3 times as high as in nature reserves. Marchantia was shown to have a very strong enrichment capacity for heavy metal ions (Cd>Zn>Cu). A significant positive correlation existed in the contents of heavy metals in Bryophytes (p><0.01). Heavy metal adsorption by the Bryophytes species studied could be well fitted by Freundlich and Temkin equations. Based on Langmuir equation, the maximum heavy metal ad sorptions were calculated. The results showed that Leucobryum had greater adsorptive capacity (4. 71 mg/ g) for Cu than other bryophytes, Marchantia had the greatest adsorptive capacity for Zn (4. 13 mg/g) and Brotherella had the greatest adsorptive capacity for Cd (4. 39 mg/g) , suggesting that Bryophytes in different functional zones of Chongqing had a good capacity of heavy metal adsorption and could be used for atmospheric heavy metal pollution monitoring.%采集了重庆不同城市功能区的主要苔藓类型,分析了其重金属(Cu,Zn和Cd)含量,并选择几种分布较广苔藓进行重金属等温吸附试验.结果表明,重庆城区苔藓中Cu,Zn和Cd三种重金属含量因所处城市功能区的不同而不同,工业园区苔藓中重金属的含量是自然保护区的2~3倍.地钱属苔藓对三种重金属的都具有较强的富集能力.对Cd的富集能力最强,其次是Zn和Cu.Cu,Zn和Cd在苔藓植物体内的含量都具有显著的正相关关系(P<0.01).几种苔藓植物对三种金属离子的等温吸附可以很好的用Freundlich和Temkin方程进行拟合.由Langmuir 方程计算苔藓植物对重金属的最大吸附量,

  13. Vertical distribution of bryophytes in Yueliang Mountain Nature Reserve%月亮山自然保护区苔藓植物垂直分布初步研究

    Institute of Scientific and Technical Information of China (English)

    罗先真; 熊源新; 曹威; 钟世梅; 谈洪英; 夏欣; 周书芹

    2016-01-01

    该研究通过采集、鉴定和测量苔藓植物标本并用SPSS软件进行数据分析,对贵州省月亮山自然保护区苔藓植物的垂直分布规律进行了初步分析。结果表明:月亮山自然保护区苔藓植物共有69科147属374种,苔藓植物呈明显的带状分布;不同海拔苔藓植物科属种所占的百分比均呈先升高后降低,优势科灰藓科( Hypnaceae)和细鳞苔科( Lejeuneaceae)和优势属凤尾藓属( Fissidens)、耳叶苔属( Frullania)、真藓属( Bryum)、疣鳞苔属( CoLoLejeunea)和细鳞苔属( Lejeunea)内种数在不同海拔也呈相同趋势;该地区苔藓植物石生群落和土生群落分布最广,木生群落次之,水生群落分布最少;苔藓植物雌雄异株数量在不同海拔均比同株数量多,比例约为7∶3;随着海拔升高,多种不利环境使长柄绢藓( Entodon macropodus)的叶片显著变小、叶长与叶宽的比显著增大,叶片由卵圆形变为卵状披针形,孢蒴极显著缩短、孢子直径显著增大,孢子的产量逐渐减少,不利苔藓植物的繁殖,蒴柄显著增长,有利于孢子的传播,体现了苔藓植物在不同的海拔的适应性。该研究结果为进一步研究苔藓植物的分布及环境适应性提供了基本资料。%The vertical distribution law of bryophytes was studied and analyzed by collecting and identifying bryophytes specimens, measuring and analyzing data by SPSS in Yueliang Mountain Nature Reserve, Guizhou, China. The results showed that there were 69 families, 147 genera and 374 species, with obvious vertical bands of bryophytes. The percent-age of families, genera and species increased first then decreased along with the increasing of altitude and the dominant families Hypnaceae and Lejeuneaceae, as well as the dominant genera Fissidens, Frullania, Bryum, Cololejeunea and Lejeunea had similar trend. The rock-community and soil-community possessed the most widely distribution

  14. Investigation on the flora of bryophytes in Yueliang Mountain Nature Reserve, Guizhou%月亮山自然保护区苔藓植物区系研究

    Institute of Scientific and Technical Information of China (English)

    谈洪英; 熊源新; 曹威; 钟世梅; 罗先真

    2015-01-01

    通过对贵州省月亮山自然保护区采集的约1000份标本的整理和鉴定,得出该地区苔藓植物有69科147属374种。对374种苔藓植物进行物种组成和区系成分的分析,得出优势科16个,优势属6个,区系划分为15种类型,其中中国—日本成分所占比例最大,并且区系成分具有由温带向热带过渡的特点。%Yueliang Mountain Nature Reserve is located at the junction of four counties:Chongjiang County, Rongjiang County, Sandu County and Libo County, at the longitude E 108°14′-109°12′, and latitude N 25°19′-26°03′, with a total area of 24800 hm2 . The flora of bryophytes is investigated for the first time through the study of 1000 collected specimens. A total of 374 species of bryophytes are identified, which be-long to 147 genera in 69 families. The species and floristic composition for the 374 species were analysed, with 16 families and six genera dominating the flora. The flora can be divided into 15 floristic elements, dom-inated by the Sino—Japan( SJ) element. The bryophytes flora in Yueliang Mountain Nature Reserve have the characteristics of transition from temperate to tropical elements.

  15. 重庆四面山自然保护区苔藓植物资源的调查%Investigation on Bryophytes in Simian Mountains Nature Reserve in Chongqing

    Institute of Scientific and Technical Information of China (English)

    张绍彬

    2012-01-01

    Based on an investigation and preliminary taxonomy in Chongqing Simian Mountains nature reserve area, the results showed that there are totally 34 families,52 genera and 62 species of bryophytes in this area, the resources are very rich.%在调查、分类和鉴定的基础上,发现重庆四面山自然保护区苔藓植物有34科、52属、62种,蕴藏资源丰富.

  16. Briófitas de praias do Estado de São Paulo, Brasil Bryophytes from sea-shores of the São Paulo State, Brazil

    Directory of Open Access Journals (Sweden)

    Sandra Regina Visnadi

    2004-03-01

    Full Text Available O trabalho compõe-se de uma lista de briófitas, um grupo de plantas ausente em ambientes marinhos, porém ocorrente em condições arenosas e salinas e sob ação das ondas e dos ventos nas praias de Ubatuba, Bertioga e Peruíbe, no Estado de São Paulo. O material coletado encontra-se depositado nos herbários SP e HRCB. As 108 exsicatas com 67 amostras de hepáticas e 59 amostras de musgos incluem 25 famílias, 49 gêneros e 77 espécies de briófitas. Os maiores números de gêneros e espécies foram observados em Lejeuneaceae e Lejeunea, respectivamente, entre as hepáticas. O mesmo pode ser dito para Orthotrichaceae e Bryum, quanto aos musgos. São citadas 29 espécies, pela primeira vez, para determinados tipos de substratos como solo, casca de arbustos e rochas. As hepáticas Ceratolejeunea laetefusca (Austin R.M. Schust., Colura ulei Ast., Lejeunea bermudiana (A. Evans R.M. Schust. e os musgos Calymperes afzelii Sw., Fissidens serratus Müll. Hal. e Weissia controversa Hedw. são citados pela primeria vez para o Estado de São Paulo. As hepáticas superaram os musgos em número de gêneros e espécies. Todas as espécies listadas são citadas pela primeira vez para praias.This paper is a list of the bryophytes found in sandy and saline conditions under action of waves and winds of sea-shores in Ubatuba, Bertioga and Peruíbe Municipalities, São Paulo State, Brazil. The group does not exist in marine environments. The material is deposited in SP and HRCB herbarium. The 108 exsiccatae with 67 samples of hepatics and 59 samples of mosses include 25 families, 49 genera and 77 species of bryophytes. Concerning to hepatics, the largest number of genera and species were found in Lejeuneaceae and Lejeunea, respectively. The same was observed on Orthotrichaceae and Bryum for mosses. Twenty-nine species are cited for the first time for these kind of substrates as soil, bark of shrubs and rocks. The hepatics Ceratolejeunea laetefusca (Austin R

  17. 金川泥炭地两个尺度下苔藓植物间及其与维管植物间的种间关系分析%Interspecific Correlations among Bryophytes and among Bryophytes and Vascular Plants in Two Scales in Jinchuan Peatland

    Institute of Scientific and Technical Information of China (English)

    曾竞; 卜兆君; 马进泽; 赵高林; 龙川; 李伟; 张兵将; 曲欢; 冯璐

    2012-01-01

    Two quadrat scales,1 m ×1 m and 25 cm ×25 cm,were established to investigate the vegetation of the Jinchuan Peatland. Interspecific correlations among 9 bryophytes and 30 main vascular plants were analyzed by X2-test,Pearson correlation,and Spearman rank correlation quantitatively. There were significantly negative associations among three main peatmosses: Sphagnum subsecundum, S. palustre, and S. capillifolium, each of which occupied different habitats. Accordingly,four ecological species groups were classified. Spearman rank correlation analysis showed that positive association amounted to 49. 53% of the 741 species pairs in the large quadrats,and more than 41. 14% of the 666 species pairs in the small quadrats. This study suggests that quadrat size played a crucial role in analyzing interspecific associations in peatlands,with great disparity in body size of different plant groups. It appears more suitable to analyze interspecific associations among bryophytes and among bryophytes and vascular plants with small and large quadrats, respectively.%在金川泥炭地设置1m×1m和25 cm ×25 cm两个尺度的大、小样方进行植被调查,并利用方差比率法、x2检验、Pearson相关分析和Spearman秩相关分析方法,定量分析了9种苔藓植物和30种主要维管植物间的种间关系.偏叶泥炭藓、大泥炭藓和尖叶泥炭藓3种优势苔藓植物彼此呈显著负关联,占领着各自不同的生境;该3种优势苔藓植物同伴生苔藓及维管植物主要呈正相关,形成独特的群落,据此划分出4个生态种组.Spearman秩相关分析表明,大样方741个种对中,正联结种对数占49.53%,明显大于小样方666个种对中的41.14%.样方大小对分析植物个体大小差异悬殊的泥炭地植物群落的种间联结的影响巨大.苔藓与维管植物间以及苔藓植物间的种间联结甚至种间关系应在大、小样方中分别探讨更合适.

  18. Local adaptations in bryophytes revisited: the genetic structure of the calcium-tolerant peatmoss Sphagnum warnstorfii along geographic and pH gradients.

    Science.gov (United States)

    Mikulášková, Eva; Hájek, Michal; Veleba, Adam; Johnson, Matthew G; Hájek, Tomáš; Shaw, Jonathan A

    2015-01-01

    Bryophytes dominate some ecosystems despite their extraordinary sensitivity to habitat quality. Nevertheless, some species behave differently across various regions. The existence of local adaptations is questioned by a high dispersal ability, which is thought to redistribute genetic variability among populations. Although Sphagnum warnstorfii is an important ecosystem engineer in fen peatlands, the causes of its rather wide niche along the pH/calcium gradient are poorly understood. Here, we studied the genetic variability of its global populations, with a detailed focus on the wide pH/calcium gradient in Central Europe. Principal coordinates analysis of 12 polymorphic microsatellite loci revealed a significant gradient coinciding with water pH, but independent of geography; even samples from the same fens were clearly separated along this gradient. However, most of the genetic variations remained unexplained, possibly because of the introgression from phylogenetically allied species. This explanation is supported by the small heterogeneous cluster of samples that appeared when populations morphologically transitional to S. subnites, S. rubellum, or S. russowii were included into the analysis. Alternatively, this unexplained variation might be attributed to a legacy of glacial refugia with recently dissolved ecological and biogeographic consequences. Isolation by distance appeared at the smallest scale only (up to 43 km). Negative spatial correlations occurred more frequently, mainly at long distances (up to 950 km), implying a genetic similarity among samples which are very distant geographically. Our results confirm the high dispersal ability of peatmosses, but simultaneously suggested that their ability to cope with a high pH/calcium level is at least partially determined genetically, perhaps via specific physiological mechanisms or a hummock-forming ability.

  19. 近五十年内蒙古大学校园内苔藓植物物种组成变化%Changes of Species Composition of Bryophytes in the Campus of Inner Mongolia University in Recent 50 Years

    Institute of Scientific and Technical Information of China (English)

    寇瑾; 白学良; 福英

    2012-01-01

    The bryophyte is one important component of the plant flora,but the research on the diversity of bryophyte communities in campus is vacancy in China. Some bryophyte specimens in the campus of Inner Mongolia University in 1964 were kept in the plant herbarium)and in the same site new specimens were collected in 2010 by setting up sample plot. Old and new specimens were identified and examined. The results of species composition of bryophytes in different year were obtained. There are 9 families,19 genera and 31 species of bryophytes in the year 1964,most of the species are drought tolerant moss in large ecological amplitude. But in the year 2010,there are 12 families,20 genera and 42 species of bryophytes, some species favor wet environment increase. The main geographical elements of the bryophytic flora of the campus in the two different years are the same,and both are Northern temperate elements and cosmopolitan. This is determined by geography and climate of this city. Similarity coefficient of species composition of bryophytes in 1964 and 2010 is 0. 4384,and it shows that the similarity is in a high level. There was a single habitat type in 1964,and only a few species distributed. With the construction of campus, more habitat types emerged in 2010. The new settlers and most species distributed in the plantations, shade of the buildings and wet soil in the open ground. On the other hand, with bare earth area reduced, the lost of wet environment made some species disappear in the campus. This highlights the effects of microhabitats diversity on the plant diversity and distribution.%苔藓植物是植物区系的一个重要组成部分,但我国对校园微环境苔藓植物多样性变化的研究仍处于空白阶段.2010年通过样方布设法对内蒙古大学校园内的苔藓植物进行采集,并通过镜下观察,将2010年所采集的标本与内蒙古大学馆藏1964年同样地的标本进行鉴定与比较.整理出1964年有苔藓植物9科、19

  20. Bryophytes in fragments of Terra Firme forest on the great curve of the Xingu River, Pará state, Brazil 1 Part of Master's Dissertation of the first author.

    Directory of Open Access Journals (Sweden)

    ACC. Pantoja

    Full Text Available Abstract Microclimatic conditions of tropical forest favour the high richness of bryophytes, which by being sensitive to environmental changes, are important indicators of habitat conditions. The aim of this study was to determine the richness and species composition of the bryophyte flora in fragments of terra firme forest on the great curve of the Xingu River, Pará state, Brazil. The collections were made in August and September 2012 in 14 fragments, in which were installed two plots per fragment, one at the edge and one inside, measuring 10 × 10 m each. The results showed 77 species in 45 genera and 18 families. Lejeunea setiloba Spruce and Marchesinia brachiata (Sw. Schiffn. are new records for Pará state. The richness families in this study were the ones typically found in tropical forest surveys. A high richness of rare species in comparison to common ones, a pattern usually observed for plants in tropical forests was not reported in this study, probably due to historical fragmentation and disturbance in the area. The richness and species composition were determined mainly by the physiognomic characteristics of the studied forest fragments.

  1. Bryophyte species diversity in seven typical forests of the West Tianmu Mountain in Zhejiang, China%浙江西天目山主要森林类型的苔藓多样性比较

    Institute of Scientific and Technical Information of China (English)

    汪岱华; 王幼芳; 左勤; 李敏; 吴文英; 黄建花; 赵明水

    2012-01-01

    苔藓是森林的重要组分,是森林保护区的重要保护对象,在物种资源和生态系统功能维护中有重要作用.该研究以浙江西天目山国家自然保护区内7种主要森林类型(落叶矮林、落叶阔叶林、常绿-落叶阔叶混交林、常绿阔叶林、针阔混交林、针叶林和竹林)内的苔藓植物为对象,调查了32个10m× 10m的样地,记录地面生苔藓植物盖度和树附生苔藓植物多度,采用重要值、相似性系数、多样性指数分析了森林类型间的苔藓植物多样性差异.共采集969份标本,隶属41科84属142种,其中苔类植物13科18属33种,藓类植物28科66属109种,优势科为灰藓科、青藓科和羽藓科.2种混交林(常绿-落叶阔叶混交林和针阔混交林)的物种丰富度和多样性指数均高于其余5种森林,其中物种丰富度以针阔混交林最高,苔藓植物多样性则以常绿-落叶阔叶混交林最高,竹林两者均为最低.海拔等环境因子较为接近的植被类型的苔藓植物多样性相似性较高,常绿阔叶林与针叶林相似性最高,而落叶矮林和竹林相似性最小.%Aims Bryophytes are an important component of forest vegetation. Their species diversity is vital to protecting plant resources and ecosystem diversity. Our objective was to explore the diversity and distribution of bryophytes and the relationship between bryophyte diversity and environment factors in seven dominant forest vegetation types (deciduous broad-leaved shrubs, DBS; deciduous broad-leaved forest, DBF; evergreen and deciduous broad-leaved mixed forest, EDF; evergreen broad-leaved forest, EBF; coniferous broad-leaved mixed forest, CBF; coniferous forest, CF; bamboo forest, BF) of West Tianmu Mountain, Zhejiang Province, China. Methods Thirty-two sites (10 m × 10 m) were established in the seven forest vegetation types. Sixteen plots were selected by systematic sampling in each sampling site. Coverage of floor bryophytes and abundance of

  2. Short-Term Responses in Maximum Quantum Yield of PSII (Fv/Fm to ex situ Temperature Treatment of Populations of Bryophytes Originating from Different Sites in Hokkaido, Northern Japan

    Directory of Open Access Journals (Sweden)

    Annika K. Jägerbrand

    2016-04-01

    Full Text Available There is limited knowledge available on the thermal acclimation processes for bryophytes, especially when considering variation between populations or sites. This study investigated whether short-term ex situ thermal acclimation of different populations showed patterns of site dependency and whether the maximum quantum yield of PSII (Fv/Fm could be used as an indicator of adaptation or temperature stress in two bryophyte species: Pleurozium schreberi (Willd. ex Brid. Mitt. and Racomitrium lanuginosum (Hedw. Brid. We sought to test the hypothesis that differences in the ability to acclimate to short-term temperature treatment would be revealed as differences in photosystem II maximum yield (Fv/Fm. Thermal treatments were applied to samples from 12 and 11 populations during 12 or 13 days in growth chambers and comprised: (1 10/5 °C; (2 20/10 °C; (3 25/15 °C; (4 30/20 °C (12 hours day/night temperature. In Pleurozium schreberi, there were no significant site-dependent differences before or after the experiment, while site dependencies were clearly shown in Racomitrium lanuginosum throughout the study. Fv/Fm in Pleurozium schreberi decreased at the highest and lowest temperature treatments, which can be interpreted as a stress response, but no similar trends were shown by Racomitrium lanuginosum.

  3. Comparison of bryophyte diversity in West Tianmu Mountain from 1977 to 2011%浙江西天目山30年来苔藓物种多样性变化

    Institute of Scientific and Technical Information of China (English)

    汪岱华; 王幼芳; 左勤; 李敏; 魏倩倩; 李晓芹; 赵明水

    2013-01-01

    Bryophyte diversity plays an important role in forest ecosystems and is important in conservation. Based on two surveys of the bryophyte flora in West Tianmu Mountain, Zhejiang Province, China, conducted between 1977 and 1980, and 2010 and 2011, respectively, an analysis was made of changes in bryophte diversity from 1977 to 2011. We found that: (1) in the past three decades, the number of species, genera and families of bryophytes, especially of liverworts, has tended to decline; (2) Brachytheciaceae, Dicranaceae, Hypanceae and Pottiaceae remain as the dominant families; (3) the stability of families is higher than that of genera and species; and (4) the greatest changes have occurred in the buffer zone, where the number of species new to the nature reserve is the highest. Most bryophytes are distributed in the area around the entrance to the Old Openning Temple in the core zone. This area shows the highest Sθensen similarity and proportion of new liverwort species. In contrast, from the Old Openning Temple to Xianren Peak in the core zone, only a few species occur and the community exhibits the lowest Sφrensen similarity. We suggest that the core zone should be regarded as a key area for bryophyte protection in the region.%苔藓物种多样性变化对苔藓植物保护和森林生态系统健康起着重要的预警作用.基于1977-1980年和2010-2011年对西天目山国家自然保护区苔藓植物的两次详细调查,本文比较了该地区1977-2011年间苔藓植物物种多样性的变化.结果表明:(1)在过去的30年间,该地区苔藓植物的科、属、种数均呈下降趋势,苔类植物的属、种数减少尤为显著;(2)青藓科、曲尾藓科、灰藓科和丛藓科一直为该地区的优势科;(3)科的稳定性均高于属、种;(4)缓冲区的总物种数变化最大,新增物种数最多;核心区(进山门-老殿)苔藓植物种类始终最为丰富,两个时期的物种相似性最高,且苔类占

  4. 九龙瀑布群喀斯特河谷区的苔藓植物区系及生态学特征%Flora and Ecology of the Bryophytes in Jiulong-Waterfalls Karst River Valley

    Institute of Scientific and Technical Information of China (English)

    李晓娜; 张朝晖; 龙明忠

    2014-01-01

    In order to comprehensively grasp the flora status of the bryophytes in Jiulong-waterfalls karst river valley,the bryophytes information of the studied area were extracted and reprocessed from the research findings in 2006 and 2010.The results were shown as follows: 1 )A total of 106 species (including subspecies and varieties)in 48 genera,19 families were found.Both the dominant bryophyte families and genera suggested that this area was with transitional characteristics between tropics and temperate zone.2)The bryoflora was dominated by East Asian elements (52%)and tropical elements (31%),in which areal patterns of East Asia (27%),tropical Asia (26%)and endemic to China (25%) occupied the highest percentages.Therefore,the bryoflora was with both characteristics of the warm temperate and south subtropical elements, and possessed very high endemism. 3 ) The ecological environment types of bryophytes in the study area were dominated by soil (67.92%),tufa (40.57%)and carbonate rock (33.02%).Because there was a large amount of silt deposited in the tufa,some soil and tufa environment types were difficult to be distinguished.4)70 species of bryophytes in 36 genera,17 families living on tufa or carbonate rocks played a part in karstic ecological processes of the study area though they were not very specific to the calcium environment.%为全面掌握云南苔藓植物区系状况,在2006年和2010年研究的基础上单独抽提云南省罗平县九龙瀑布群喀斯特河谷区的苔藓数据进行苔藓植物区系及其生态学特征分析。结果表明:1)该区共有苔藓植物19科48属106种(含变种和亚种),其优势科、属均体现了该地区由温带向热带过渡的特征。2)区内苔藓区系地理成分并不复杂,以东亚成分(52%)和热带成分(31%)占绝对优势,其中又以东亚分布型(27%)、热带亚洲分布型(26%)和中国特有分布型(25%)所占比例最高,反映了该区系

  5. Water Conservation and Pedogenic Function of Bryophytes in Abandoned Carlin Gold Mine%废弃卡林型金矿区结皮苔藓植物蓄水作用和成土功能研究

    Institute of Scientific and Technical Information of China (English)

    王登富; 王智慧; 张朝晖

    2012-01-01

    The bryophytes found in an abandoned Carlin gold mine of Xingyi City, Guizhou Province were in- vestigated in this study. According to field survey and identification of the bryophyte specimens, seven taxa in six genera of four families were found. Pottiaceae and Bryaceae were the dominant families and no Hepati- cae and Anthocerotae was identified. The life-forms of the bryophyte were mainly short turfs(85.71%) and the others were wefts(14.29%). The dominant bryophytes are Barbula rigidula (Hedw.) Mild., Bryum blindii B. S. G. , Trichostomu brachydontium Bruch. and Brachythecium perminusculum C. Muell. Of these species, the biomass range from 3.00 to 52.40 g/m2, with formed soil varying from 217.50 to 3 695. 80 g/m2, water holding capacity from 35.10 to 684.30 g/m2, and saturated water absorption ratio from 1 170.00% to 3 637.00%. These results indicate that the bryophyte crust found in the mine had great ability to absorb and reserve water and played an important role in soil formation, rock desertification control and ecological environment renovation in karst areas.%通过野外调查和实验室分析,对贵州省兴义市新路废弃卡林型金矿区苔藓植物进行了研究。结果显示,该矿区共计有苔藓植物4科6属7种,未发现苔类和角苔,种类组成较单调,其中丛藓科(Pottiaceae)和真藓科(Bryaceae)为优势科;生活型有2种类型:矮丛集型(85.71%)和交织型(14.29%),矮丛集型占有绝对优势;并对该矿区结皮优势苔藓植物硬叶扭口藓、卵蒴真藓、毛口藓和小青藓的生物量、成土量、饱和吸水率和饱和吸水量进行了测定分析。结果显示,该矿区生物量为3.00~52.40g/m2;成土量为217.50~3 695.80g/m2;饱和吸水量为35.10~684.30g/m2;饱和吸水率为1 170.00%~3 637.00%。研究表明,在喀斯特石漠化严重的废弃金矿区,对于在缺少土壤,水土流失严重和植被破坏大的环境区域,苔藓植物以其特有的

  6. 庐山自然保护区岩生苔藓植物资源及开发利用%Resources of Rock Bryophytes Plant and Their Exploitation and Utilizations in Lushan Nature Reserve

    Institute of Scientific and Technical Information of China (English)

    宋满珍; 刘昊; 聂宏; 詹选怀

    2015-01-01

    The rock bryophytes plants resources in Lushan Nature Reserve in Jiangxi Province were studied to provide scientific basis for utilization and protection of rock bryophytes plants resources .Characteristics and their exploitation and utilizations of rock bryophytes plants resources in Lushan Mountain were analyzed using field investigation and lit-erature materials including Flora of Jiangxi ,Moss Flora of China .The result showed that there were 64 species of rock bryophytes plants resources in Lushan Nature Reserve ,belonging to 41 genera and 29 families ,among which there were 39 species belonging to 27 genera and 15 families were found for Musci ,25 species belonging to 14 genera and 14 families were found for hepaticae .According to the checklist ,the main families were Pottiaceae ,Thuidiaceae ,Br-chyrtheciaceae ,Frullaniaceae ,Pore1laceae;And the main genera were Barbula ,Frullania ,Porella ,Thuidium ,Rhyn-chostegiella ,Herberta .The temperate elements took up a predominant position (34.38% ) ,the East-Asia elements and the tropic elements had a high inverse proportion ,taking up 26.56% and 23.43% of total species respectively .The rock bryophytes resources in Lushan Nature Reserve showed rich diversity at the aspects of species composition ,com-plex geographic components ,the transition characteristics from north to south .And their greening ,road slope and ec-ological restoration had the development and utilization of great value .%调查分析江西省庐山自然保护区岩生苔藓植物资源特征 ,为岩生苔藓植物合理开发利用及保护提供参考.通过野外调查和查阅《江西植物志》、《中国苔藓植物志》等文献资料 ,分析庐山岩生苔藓植物资源特征及开发利用.庐山自然保护区岩生苔藓植物有29科41属64种 ,其中藓类植物15科27属39种 ,苔类植物14科14属25种.在科属组成分析中 ,丛藓科 Pottiaceae、羽藓科 Thuidiaceae、青藓科 Brchyrtheciaceae

  7. 云南汤丹铜矿区苔藓植物初步调查%Bryophytes in Tangdan Copper Mine Site in Yunnan Province

    Institute of Scientific and Technical Information of China (English)

    周灵燕; 张朝晖

    2007-01-01

    Bryophyte species were investigated in Tangdan Copper Mine site in Dongchuan District of Kunming City, Yunnan Province. Twenty-two species belonging to 16 genera (Barbula, Gymnostomum, Didymodon, etc.) of 6 families (Pottiaceae, Bryaceae, Brachytheciaceae, Thuidiaceae, Ditrichaceae and Entodontaceae) were found,59% of which was Pottiaceae as a dominant family. Sixty-eight percent of the species lived on cupreous rocks covered with patina, while 32% grew on cupreous soil. The species were divided into short turf (68%), high turf (14%) and weft (18%). There were 7 areal types (Eastern Asia and North America, Endemic to China, Tropical Asia and Tropical Africa, Eastern Asia, Cosmopolitan, Tropical Asia, North Temperate), among which Eastern Asia was dominant. The classical "Copper Mosses" were absent.%经野外采样及鉴定,发现在云南东川汤丹铜矿分布着6科(丛藓科、真藓科、青藓科、羽藓科、牛毛藓科和绢藓科)16属(扭口藓属、净口藓属、对齿藓属等等)22种苔藓植物,其中59%是丛藓科植物,为优势科.并且这些苔藓植物中有68%是直接生活在布满铜绿的矿岩石上,另外32%是生活在含氧化铜的矿土上.苔藓植物生活型有3种:矮丛集型占68%、高丛集型14%、交织型18%.区系分布类型有7种(东亚和北美分布、中国特有分布、热带亚洲和热带非洲分布、东亚分布、世界分布、热带亚洲分布及北温带分布),以东亚分布为主.未发现经典的铜藓(Copper Mosses).

  8. Determination of Bisbibenzyls in Bryophytes Collected from Different Locations by RP-HPLC%RP-HPLC法分析不同种属和采集地点苔藓植物中双联苄类化合物成分

    Institute of Scientific and Technical Information of China (English)

    吕蓓蓓; 邢杰; 娄红祥

    2009-01-01

    AIM: To develop a rapid high-performance liquid chromatographic method for the determination of bisbibenzyls in four bryophytes. The effects of species and sample locations on the bisbibenzyi composition and con-tent were also evaluated. METHOD: Chromatographic separation was achieved on a Hypersil C18 column (150 mm×4.6 mm, I.D. 5μ m) with acetonitrile-water gradient elution (each containing 0.05% formic acid). UV detection was per-formed at 280 nm. RESULTS: A total of 6 bisbibenzyls were detected in four bryophytes, and the results show that the sample locations and species have an influence on the bisbibenzyl composition and the content of each bisbibenzyl. CONCLUSION: This method not only provides a useful tool for analyzing and quantifying the bisbibenzyls but also provides useful information on the phytochemical research of these bryophytes.%目的:建立一种反相高效液相色谱法以快速分析四种苔藓植物中双联苄类化合物,并对不同种属不同采集地点的苔藓植物中双联苄类化舍物进行分析比较.以考察种属及采集地点对该类化合物的种类和含量影响.方法:采用Hypersil C18柱(150mm×4.6 mm,I.D.5 μm)分离,以乙腈-水(各含0.05%酸)为流动相,线性梯度洗脱,于280 nm波长下检测.结果:共检测出6种双联苄类化合物,并且种属和采集地点差异对该类化合物的种类和含量有不同程度的影响.结论:建立了一种有效的分析及测定不同苔类植物中双联苄类化合物的方法,并可为苔藓植物化学成分研究提供参考信息.

  9. Bryophytes use like atmospheric indicators of heavy metals in the metropolitan area of the Toluca Valley; Uso de briofitas como indicadores atmosfericos de metales pesados en la zona metropolitana del Valle de Toluca

    Energy Technology Data Exchange (ETDEWEB)

    Poblano B, J.

    2013-07-01

    The objective of this work was to evaluate the concentration of Ti, V, Cr, Mn, Fe, Cu, Zn and Pb in species of frequent and abundant bryophytes in the Metropolitan Area of the Toluca Valley (MATV). The concentration of the studied metals was determined in two different seasons (cold-dry and warm-humid) in 11 sites of the MATV, 7 of them classified as urban areas, 2 as transition areas and 2 as protected natural areas. Only epiphyte organisms found to a superior height of 100 cm of the floor were considered and the species determination was realized in the Sciences Faculty of the Universidad Autonoma del Estado de Mexico, while the processing of the samples was carried out in the Instituto Nacional de Investigaciones Nucleares (ININ). The samples processing consisted on separating the bryophytes of the bark of the trees, later on each one of the samples was washed, milled and homogenized, at the end they were subjected to a digestion process accelerated by microwaves. The concentration of Ti, V, Cr, Mn, Fe, Cu, Zn and Pb in the bryophytes was determined applying the X-rays Fluorescence technique, using a spectrometer Tx-2000 Ital-Structures, with a detector type Si (Li), a tube of Mo (40 kV, 30 m A) with 17,4 keV like excitement energy. Each sample was analyzed six times with a counting time of 500 seconds. Additionally enrichment factors were obtained using reference soils considered as not impacted by anthropogenic activities. With the obtained results space and temporary differences were established through descriptive statistic, also the enrichment factor to infer the possible origin of the metals was calculated, as well as the sites that could represent a risk for the health. The species more frequent and abundant were F. ciliaris and L. angustata, presenting the following tendency in their metals concentration Fe>Ti>Mn>Zn>Pb>V ≅ Cu>Cr, being observed that the temporality is a factor that influences in the metals concentration and that in general F. ciliaris

  10. Relations of benthic macroinvertebrates to concentrations of trace elements in water, streambed sediments, and transplanted bryophytes and stream habitat conditions in nonmining and mining areas of the upper Colorado River basin, Colorado, 1995-98

    Science.gov (United States)

    Mize, Scott V.; Deacon, Jeffrey R.

    2002-01-01

    Intensive mining activity and highly mineralized rock formations have had significant impacts on surface-water and streambed-sediment quality and aquatic life within the upper reaches of the Uncompahgre River in western Colorado. A synoptic study by the U.S. Geological Survey National Water-Quality Assessment Program was completed in the upper Uncompahgre River Basin in 1998 to better understand the relations of trace elements (with emphasis on aluminum, arsenic, copper, iron, lead, and zinc concentrations) in water, streambed sediment, and aquatic life. Water-chemistry, streambed-sediment, and benthic macroinvertebrate samples were collected during low-flow conditions between October 1995 and July 1998 at five sites on the upper Uncompahgre River, all downstream from historical mining, and at three sites in drainage basins of the Upper Colorado River where mining has not occurred. Aquatic bryophytes were transplanted to all sites for 15 days of exposure to the water column during which time field parameters were measured and chemical water-quality and benthic macroinvertebrate samples were collected. Stream habitat characteristics also were documented at each site. Certain attributes of surface-water chemistry among streams were significantly different. Concentrations of total aluminum, copper, iron, lead, and zinc in the water column and concentrations of dissolved aluminum, copper, and zinc were significantly different between nonmining and mining sites. Some sites associated with mining exceeded Colorado acute aquatic-life standards for aluminum, copper, and zinc and exceeded Colorado chronic aquatic-life standards for aluminum, copper, iron, lead, and zinc. Concentrations of copper, lead, and zinc in streambed sediments were significantly different between nonmining and mining sites. Generally, concentrations of arsenic, copper, lead, and zinc in streambed sediments at mining sites exceeded the Canadian Sediment Quality Guidelines probable effect level (PEL

  11. Impoverishment of the bryophyte and lichen flora of the Dutch chalk grasslands in the thirty years 1953-1983. [Tortella spp. ; Trichostomum spp. ; Aloina spp. ; Pleurochaete squarrosa; Abietinella abietina; Camptothecium lutescens; Brachythecium rutabulum

    Energy Technology Data Exchange (ETDEWEB)

    During, H.J.; Willems, J.H.

    1986-01-01

    The Dutch chalk grasslands were formerly very rich in bryophyte and lichen species. A comparison of data from Barkman (1953) and more recent inventories yielded the following results: (a) Lichens have disappeared nearly completely from the Dutch chalk grasslands; (b) many characteristic acrocarps (e.g., Tortella spp., Trichostomum spp., Aloina spp., Pleurochaete squarrosa) and some pleurocarps (Abietinella abietina, Camptothecium lutescens) have decreased drastically; (c) some common litter-indicator species (Brachythecium rutabulum and others) are now increasing. It is hypothesized that this change is mainly a result of combined effects of the abandonment of the old grazing regime, which is in only a few places replaced by mowing, and of air pollution. The authors are strongly in favor of current attempts to reintroduce grazing by the old race of Mergelland sheep.

  12. 长白山采集的中国东北新记录苔藓植物%New Records of Bryophytes to Northeast China Collected from Changbai Mountain

    Institute of Scientific and Technical Information of China (English)

    曹同; BELANDReneJ

    2002-01-01

    在对中国和加拿大苔藓学者联合于中国东北最高的长白山采集的2千余份标本鉴定的基础上,认定有苔藓植物59科,152属,300种.报道了中国大陆新记录1属-小曲柄藓属(Cam pylostelium ).中国东北新记录2属-直蓑衣藓属(Macrocoma )和同叶藓属(Iso pter ygium) ,中国东北新记录5种-褶叶裂叶苔(Lophozia incisa),假狗牙藓(Cynodontium f allax),细枝牛毛藓(Ditrichum gracile),散叶牛毛藓(Ditrichum divarcatum )和细叶棉藓(Plagiothecium latebricola).%Based on identification of more than 2000 specimens collected by joint expedition of Chinese and Canadian bryologists from Changbai Mountain .the highest peak in Northeast China.300 species belonging to 152 genera and 59 families of bryophytes are recognized.Among them,the genus Campylostelium (C saxicola (Web et Mohr) B S G) is new to mainland China;two genera are first records for Norheast China:Macrocoma (M tenus (Hook et Grev) Vitt spp sullivantii (C Muell) Vitt) and Isopterygium (I albescens (Hook) Jaeg).Five species of bryophytes are also new to Northeast China:Lophozia incisa (Schrad) Dum:Cynodontium fallax Limpr:Ditrichum gracile (Mitt) O Kuntze:Ditrichum divarcatum Mitt;and Plagiothecium latebricola (Wils) Schimp .

  13. 大板水国家森林公园苔藓植物种类的调查%Species Investigation of Bryophytes in Dabanshui National Forest Park of Guizhou Province

    Institute of Scientific and Technical Information of China (English)

    何林; 黄正莉; 杨通冠; 向天敏

    2011-01-01

    215 specimens collected in Dabanshui National Forest Park were identified to study the species of bryophytes in Dabanshui National Forest Park. The results showed that 129 species (including subspecies and varieties, the same below) of bryophytes, belonging to 61 genera of 30 families were found. For mosses, there are 97 species, belonging to 43 genera of 18 families, while for liverworts, 32 species, belonging to 18 genera of 12 families were identified. The specie Neckeropsis nitidula is newly recorded in Guizhou. Brchytheciaceae, Lejeuneaceae、 Mniaceae, Dicranaceae, Hypnaceae and Entodontaceae are the predominant families in this region, and there are nine dominant genera such as Brachythecium、 Entodon、 Plagiotheciurn in this region.%为了解大板水国家森林公园的苔藓植物种类,对采自大板水国家森林公园的215个苔藓植物标本进行了鉴定.结果表明:大板水国家森林公园有苔藓植物129种,隶属于61属,30科,其中藓类植物18科43属97种,苔类植物12科18属32种,并发现光叶拟平藓[Neckeropsis nitidula(Mitt.)Fleisch]为贵州新记录种.青藓科(Brchytheciaceae)、细蜂苔科(Lejeuneaceae)、提灯藓科(M niaceae)、曲尾藓科(Dicranaceae)、灰藓科(Hypnaceae)和绢藓科(Entodontaceae)为该地区的优势科,青藓属(Brachythecium),绢藓属(Entodon),棉藓属(Plagiothecium)等9属为该区域优势属.

  14. X-RAY FLUORESCENT ANALYSIS OF THE 6 SPECIES OF BRYOPHYTE IN THE KING GEORGE ISLAND, ANTARCTICA%南极乔治王岛六种苔藓植物的X荧光分析

    Institute of Scientific and Technical Information of China (English)

    黄宇营; 巨新; 康士秀; 吴自勤; 沈显生; 孙立广; 尹雪斌; 张莉

    2001-01-01

    在无标样条件下,我们利用微束X荧光分析法对南极乔治王岛的6种苔藓植物的叶和茎进行重元素分析。它们是:Andreaea regularis, Bryum muehlenbeckii, Drepanocladus uncinatus, Brachythecium subpilosum, Tortula saxiola, Ditrichum austro-georgicum。研究结果发现,不同苔藓植物对各种不同重元素的吸收能力不同,即使是同一种植物,叶和茎中的重元素成分也有差异。在6种苔藓中,Andreaea regularis 体内的重元素种类最少,但其对Fe有较强的吸收。由于南极环境条件优越,在苔藓植物体内,尚未发现大量有毒重金属元素的存在。%Without a standard specimen, we analysed the heavy element content of 6 moss species in the King George Island of Antarctica by XRF. They are Andreaea regularis, Bryum muehlenbeckii, Drepanocladus uncinatus, Brachythecium subpilosum, Tortula saxiola and Ditrichum austro-georgicum. We found that various plants absorbed varied heavy elements. Even if the same moss, there are the different elements in leaves and stems. Andreaea regularis is possessed of the fewest heavy element varieties in 6 species of bryophyte, but it absorbs Fe more powerfully. Owing to superior environment, we didn't find a lot of poisonous heavy metal elements in bryophyte of Antarctica.

  15. Ground bryophyte diversity in secondary birch forests in western Sichuan, China%亚高山次生桦木林地表苔藓组成与多样性

    Institute of Scientific and Technical Information of China (English)

    闫晓丽; 包维楷

    2011-01-01

    桦木林(Betula spp.)是我国原始冷杉林(Abies spp.)皆伐后自然恢复形成的主要次生林之一,为揭示其发育过程中地表苔藓组成与多样性差异,评估其自然恢复状况,我们选择了四川省金川县507林场地形条件基本一致的3个桦木林地以及1个原始岷江冷杉(Abies faxoniana)林地,调查了地表苔藓层结构和物种组成.结果显示:(1)桦木林的地表苔藓植物盖度低于原始林,不同年龄的桦木林之间其盖度没有差异(P>0.05),但优势种的组成差异及物种替代明显;(2)桦木林地表苔藓物种丰富度较原始林高,不同年龄相比,9年生和22年生较42年生桦木林地表苔藓种类丰富;(3)未郁闭桦木林(9年生)与郁闭林(22年生和42年生)间的地表苔藓物种组成相似程度(相似性系数为0.24-0.29)低于它与原始林间的相似程度(0.51);22年生和42年生桦木林间地表苔藓物种组成相似程度(相似性系数为0.50)高于它们与原始林间的相似性程度(0.13-0.24),在自然恢复过程中,桦木林与原始林下地表苔藓共有种数量逐渐减少,相似程度降低.原始林下35种地表苔藓植物中只有25种存在于迹地桦木林地.上述分析表明:迹地上自然恢复9-42年的桦木林下地表苔藓多样性虽然较云杉人工林高,但仅保存约70%的原始林下种类,而约有29%的敏感苔藓种类无法通过次生林自然恢复过程得以保育或恢复.%Secondary birch (Betula spp.) forest is an important vegetation type in western Sichuan, China.These forests have naturally regenerated from primary fir (Abies spp.) forests after clear-cutting. However,little is known about ground bryophyte species composition and community structure during this succession sequence. In our study, we sampled three plots in 9-, 22-, and 42-year old secondary forests, and a primary fir forest, respectively, in Jinchuan County. We found that bryophyte coverage in different aged secondary forests was

  16. Species diversity of epiphytic bryophytes in Baihua Mountain National Nature Reserve,Beijing%北京百花山自然保护区树附生苔藓植物物种多样性

    Institute of Scientific and Technical Information of China (English)

    田晔林; 李俊清; 石爱平; 于建军; 王文和

    2013-01-01

    An investigation was conducted on the species diversity of epiphytic bryophytes in Baihua Mountain National Nature Reserve, Beijing in 2004-2010. A total of 495 specimens were recorded, belonging to 34 species, 21 genera, and 13 families, among which, Pottiaceae, Leskeaceae, Entodontaceae, Orthotrichaceae, and Hypnaceae were the dominant families, and Lindbergia sinensis, Pylaisiella polyantha, L. brachyptera, and Frullania musicicola were the dominant species. There were three peaks of the vertical distribution of the epiphytic bryophytes, i. e. , altitude 1700 m (10 species) , and only 5 species were distributed at altitude 1200-1300 m. Shannon index was the highest for Betula platyphylla ( 1. 816) and the smallest for Juglans mandshurica (1. 500) , Pielou evenness index was the highest for Populus davidiaria (0. 910) and the smallest for Q. liaotungensis (0.591) , Simpson index was the highest for Q. liaotungensis (0.335) and the smallest for P. davidiana (0. 181) , and Patrick index was the highest for Q. liaotungensis (13) and the smallest for P. davidiana and J. mandshurica (7). The species diversity indices of the epiphytic bryophytes were related to habitat, bark crack, and water availability.%北京百花山保护区树附生苔藓植物共有13科21属34种,其中优势科有丛藓科(Pottiaceae)、薄罗藓科(Leskeaceae)、绢藓科(Entodontaceae)、木灵藓科(Orthotrichaceae)和灰藓科(Hypnaceae),优势种有中华细枝藓(Lindbergia sinensis)、金灰藓(Pylaisiella polyantha)、细枝藓(L.brachyptera)、盔瓣耳叶苔(Frullania musicicola)等.海拔1200 m以下地带(14种)、海拔1400 ~ 1500 m地带(11种)以及海拔1700 m以上地带(10种)是百花山树附生苔藓植物垂直分布的3个高峰.海拔1200 ~ 1300 m为低谷(5种).树附生植物物种Shannon指数最大的是白桦(Betula platyphylla)(1.816),最小的是核桃楸(Juglans mandshurica)(1.500);山杨(Populus davidiana)树附生植物的Pielou均匀度指数最高(0

  17. Contribuição para o conhecimento da taxonomia, ecologia e fitogeografia de Briófitas da Amazônia Oriental Contribution to the taxonomy, ecology and phytogeographical knowledge of Bryophytes from Eastern Amazonia

    Directory of Open Access Journals (Sweden)

    Lisi Dámaris Pereira Alvarenga

    2009-09-01

    Full Text Available O presente trabalho documenta o inventário da brioflora da Estação Científica Ferreira Penna (ECFPn, localizada na FLONA Caxiuanã (1º42'30"S - 51º31'45"W, Melgaço - Pará, realizado por ocasião da primeira chamada do Programa de Residência em Estudos Amazônicos, iniciativa do Museu Paraense Emílio Goeldi. Musgos e Hepáticas foram amostrados nos ecossistemas de mata de terra firme, várzea, igapó, capoeiras e campina, e analisadas quanto à composição, riqueza e diversidade. Foram registradas 1081 ocorrências de briófitas de 120 espécies, sendo 79 hepáticas e 41 musgos, das quais oito hepáticas são novas referências para o Estado do Pará. As famílias de maior riqueza e assiduidade foram Lejeuneaceae (58 spp., Calymperaceae (13 spp., Sematophyllaceae (9 spp. e Plagiochilaceae (7 spp.. As comunidades que melhor se fizeram representar foram a epífita (97 espécies/ 565 ocorrências e a epíxila (65 spp./ 242 ocorr., seguidas pelas comunidades epífila (27 spp./ 174 ocorr. e terrícola (15 spp./ 96 ocorr. e o ecossistema que apresentou maior riqueza e diversidade foi mata de terra firme. Quanto à composição nos substratos inventariados, foi observada uma inversão gradativa na proporção de riqueza entre hepáticas/musgos, sendo as primeiras fortemente dominantes em folha, moderadamente dominantes em tronco vivo e morto, ao passo que musgos predominaram nos demais. Os resultados obtidos neste inventário, inclusive as novas referências para o Estado, contribuem para o entendimento dos padrões de riqueza e diversidade na Floresta Amazônica e enriquecem a flora conhecida para o Estado do Pará.This paper presents the floristic survey of Bryophytes from Ferreira Penna Scientific Station (ECFPn, located in the FLONA Caxiuanã (1º42'30"S - 51º31'45"W, Melgaço - Pará, that was undertaken in the first stage of the Residence Program in Amazonian Studies, a project of the Museu Paraense Emílio Goeldi. Mosses and

  18. Species of Epiphytic Bryophytes and Index of Atmospheric Purity in Guiyang City%贵阳市区树木附生苔藓植物的种类及大气净度指数

    Institute of Scientific and Technical Information of China (English)

    王子飞; 熊源新; 刘正东; 孙中文; 崔瑞华

    2012-01-01

    In order to investigate epiphytic bryophytes species and provide references for using bryophytes to monitor Guiyang's air pollution. An investigation on indicators,including species, frequency and coverage of epiphytic bryophytes was conducted by the methods of field investigation, spot sampling and specimen verification from August to November in 2011. Meanwhile, the index of atmospheric purity was analyzed. The results showed that they belonged to 79 species (including subspecies and variation) of 38 genera, 19 families, including 12 liverworts species of 5 genera, 4 families and 67 moss species of 33 genera, 15 families. The IAP was between 0. 63 and 18. 67, which was the highest in Baiyun District and Jinyang District(10. 67~18. 67) , followed by Yunyan District and Huaxi District(3.05~9.54) , the lowest IAP was in Xiaohe District, Nanming District and Wudang District (0.63~2.53). Haplocladium angustifolium and Taxiphyllum taxirameum were widely distributed and grew very well, so they could be used to monitor Guiyang's air pollution.%为了摸清贵阳市区树木附生苔藓植物的种类,为应用苔藓植物监测贵阳市大气污染状况提供参考,采用实地考察、定点取样和标本鉴定相结合的方法,于2011年8-11月对贵阳市树木附生苔藓植物的种类、盖度、频度等指标进行调查,并分析其大气净度指数.结果表明:贵阳市区树木附生苔藓植物共19科38属79种(包括亚种、变种),苔类植物4科5属12种,藓类植物15科33属67种;大气净度指数(IAP)为0.63~18.67;大气污染情况,白云区、金阳区为清洁区,IAP最高,为10.67~18.67;云岩区、花溪区次之,IAP值为3.05~9.54;小河区、南明区、乌当区的污染相对较重,IAP值最小,为0.63~2.53;狭叶小羽藓和鳞叶藓的分布范围较广、生长较好,可作为监测贵阳市区大气污染状况的苔藓植物.

  19. Comparative study on bryophytes of Carlin gold mine and non-gold field area in Nipu, Guizhou%贵州泥堡卡林型金矿区与非金矿区苔藓植物比较研究

    Institute of Scientific and Technical Information of China (English)

    黄文琥; 张朝晖

    2008-01-01

    首次报道了贵州普安县泥堡村韭菜烂滩的卡林型金矿区和非金矿区的苔藓.记录了泥堡韭菜烂滩卡林型金矿生苔藓3科8属15种,非金矿生苔藓9科15属20种.通过比较我们得到韭菜烂滩卡林型金矿区和泥堡非金矿区苔藓的相似性系数为11.4%.这表明这两个生境下的苔藓组成差异极大.在这个地区有13种苔藓植物(包括异芽丝瓜藓Pohlia leucostoma、卵蒴丝瓜藓P.proligera、长蒴藓Trematodon longicollis等)只生长在卡林型金矿上,这表明有一些苔藓植物适应卡林型金矿这种基质.也许,在泥堡地区某些苔藓植物的分布与卡林型金矿存在一定的关系.%In this paper,the bryophytes both on Carlin gold mine and non-gold field area of Jiueailantan in Nipu Vil- lage of Pu'an County in Guizhou Province were reported for the first time. 15 speciea belonging to 8 genera of 3 fami- lies were found on the Carlin gold mine of Jiucailantan, and 20 species belonging to 15 genera of 9 families on non-gold field area in Nipu. Through comparison, the similarity coefficient of species level was 11.4% between the two sample sites in Nipu. It showed the distinct diversity on bryophytes of Carlin gold mine and non-gold field area. Among these bryophytes, 13 species of them (Pohlia leucostoma, P. proligera, Trematodon longicollis, etc. ) only grew on Carlin gold mine, indicating that some bryophytes adapted to the substrate of Carlin gold mine, and there were some relations between bryophytes and Carlin gold mine distribution in Nipu area.

  20. Floristic composition and diversity of Amazonian rainforest bryophytes in the state of Acre, Brazil Composição florística e diversidade de briófitas em floresta no estado do Acre, Brasil

    Directory of Open Access Journals (Sweden)

    Denise Pinheiro da Costa

    2003-01-01

    Full Text Available Bryophyte diversity in Amazonian Brazil is high, presently recorded at 514 species distributed among 36 families and 89 genera. Comparisions of species richness among the Amazonian states of Brazil suggests that the bryoflora of Acre is still underestimated, presently recorded at 106 species distributed among 33 families and 63 genera. After two field trips, the diversity increased 50% showing that the bryoflora is still poorly known. Collection data and comments on morphology, ecology and distribution are given for sixty-two species of bryophytes collected in the state of Acre, Brazil, which are new (fifty-two species or interesting floristic records (ten species. Microlejeunea crenulifolia (Gottsche Steph. and Stictolejeunea balfourdii Mitt. are new records for Brazil and fifty species are new records for Acre.A diversidade de briófitas na região Amazônica brasileira é alta, sendo citado atualmente, 514 espécies, em 36 famílias e 89 gêneros. Comparações entre a riqueza de espécies dos estados da Amazônia brasileira sugerem que a brioflora do Acre ainda é subestimada, contando atualmente com 106 espécies, distribuídas em 33 famílias e 63 gêneros. Após duas excursões científicas, a diversidade para o estado aumentou em 50 %, demonstrando que a brioflora ainda é pouco conhecida. Dados sobre a morfologia, ecologia e distribuição geográfica são apresentados para sessenta e duas espécies de briófitas coletadas no estado do Acre, Brasil, as quais são registros florísticos novos (cinquenta e duas espécies ou interessantes (dez espécies. Microlejeunea crenulifolia (Gottsche Steph. e Stictolejeunea balfourdii Mitt. são citadas pela primeira vez para o Brasil e cinquenta espécies são novas ocorrências para o estado do Acre.

  1. Characteristics of bryophytes with gemmae from a karst bauxite mine:A case study of Lindai mine in Zhanj ie town,Qingzhen,Guizhou%贵州喀斯特铝土矿具芽胞苔藓种类特征--以贵州省清镇市林歹铝土矿区为例

    Institute of Scientific and Technical Information of China (English)

    殷声锋; 王智慧; 张朝晖

    2014-01-01

    对贵州省清镇市站街镇林歹铝土矿第二矿区的油菜种植区、矿土上部树林区、废石堆积区、矿土堆积恢复区4类环境进行苔藓植物采集,并对具芽胞苔藓种类进行统计分析,结果表明:(1)经鉴定发现苔藓植物10科22属37种,优势种(频度大于10%)为日本大丛藓Molendoajaponica Broth.(18.72%)和银叶真藓Bryumargenteum Hedw.(11.06%);(2)发现8种具芽胞苔藓,占总种数的21.62%,隶属于丛藓科 Pottiaceae 和真藓科 Bryaceae,其中日本大丛藓和芽胞银藓Anomobryumgemmigerum Broth.为常见具芽胞苔藓;(3)油菜种植区中具芽胞苔藓种类最多(6种),但出现频度不高,非该类环境中的优势种,日本大丛藓在 4类环境中均有发现;(4)在 4类环境中,相对恶劣条件下具芽胞苔藓出现的几率更大;(5)瘤根真藓 Bryum bornholmense Winkelm.& Ruthe.和毛状真藓 Bryum apiculatum Schwagr.的芽胞长于假根上,其余种类芽胞均见于叶腋处,呈扫帚状,芽胞形态上呈现多样性,有球形、棒形、棒槌形、芽形、纺锤状和火炬状。%Bryophytes were collected from four different habitats in Lindai #2 bauxite mine in Zhanjie town, Qingzhen City,Guizhou Province,and the bryophytes with gemmae were statistically analyzed.The result showed that,(1)120 samples were collected from sampling sites,and 10 families,22 genera and 37 species were identified.The dominant species (frequency >10%)were Molendoa japonica Broth (18.72%)and Bryumargenteum Hedw.(11.06%).(2)8 kinds of bryophytes had gemmae,which were attached to Potti-aceae and Bryaceae,accounting for 21.62% of the total.Of these,Molendoajaponica Broth and Bryumar-genteum Hedw.were common bryophytes with gemmae,found in 44 samples and 16 samples respectively. (3)The largest quantities of bryophytes with gemmae were found in areas where rape was cultivated (6 spe-cies);however,frequency was low and there was no dominant species.Additionally,Molendoa japonica Broth

  2. The rps4 locus as an alternative marker for barcoding bryophytes: evaluation based on data mining from GenBank%rps4作为苔藓植物候选条形码的可行性:基于GenBank数据的分析

    Institute of Scientific and Technical Information of China (English)

    刘艳; 王建秀; 葛学军; 曹同

    2011-01-01

    Among the candidate DNA barcoding loci suggested for land plants, only rbcL and trnH-psbA are available for barcoding bryophytes. However, both loci have limitations in discriminating among species.The present study evaluated the feasibility of using the cpDNA rps4 locus as an additional marker to complement other candidate barcodes for bryophytes. We analyzed 3,365 rps4 sequences retrieved from GenBank using pair-wise distance and phylogenetic methods. Our results demonstrated the universality of rps4 in bryophytes; the locus covers 96% of moss families and 88% of liverwort families. The rps4 locus resolved 73.0% of the species we tested. The discriminatory ability of rps4 is better than that of rbcL-a in each of the six bryophyte genera (i.e. Plagiochila, Tortula, Plagiomnium, Pyrrhobryum, Pogonatum, Grimmia) most commonly represented in the database. Moreover, large numbers of rps4 sequences from individuals of known bryophyte identities have been compiled in GenBank, thereby providing a reference for species identification. Therefore, we propose rps4 as an additional barcode, especially when rbcL and trnH-psbA do not perform well in certain bryophyte taxa.%对于苔藓植物DNA条形码研究来说,目前已提议的可用片段只有rbcL和trnH-psbA,并且均具有一定局限性.本文基于GenBank中3,365条rps4序列,利用遗传距离法和分子系统学方法评价它作为苔藓植物候选条形码的可行性.结果显示:(1)rps4序列覆盖了藓纲96%的科和苔纲88%的科,具有通用性;(2)rps4物种分辨能力为73.0%,并且它在6个序列最丰富的苔藓植物属(Plagiochila,Tortula,Plagiomnium,Pyrrhobryum,Pogonatum,Grimmia)内的物种识别能力均高于rbcL-a在同属中的分辨能力;(3)GenBank中已经积累了大量已知物种米源的rps4序列,可为DNA条形码物种鉴定提供一个参考数据库.因此,本文建议将rps4作为苔藓植物候选DNA条形码.尤其是当rbcL和trnH-psbA在某个具体类群中无法

  3. 贵州省新路卡林型金矿区苔藓植物多样性及重金属污染监测%Bryophyte Diversity and Their Monitoring for Heavy Metal Pollution from Xinlu Carlin Gold Deposit in Guizhou Province

    Institute of Scientific and Technical Information of China (English)

    付兰; 张朝晖

    2012-01-01

    Twenty-eight bryophyte taxa in 17 genera of 10 families from Xinlu Carlin gold field were investigated. Nine species belong to Pottiaceae and 8 species belong to Bryaceae. Among them, Pottiaceae and Bryaceae are the dominate families. By analyzing β diversity of four sites in this area, we found that β diversity difference between barren rock field-waste residue field and relatively polluted area-clear area is the largest, bryophyte community structure is the biggest difference, and similarity is the lowest. A particular regularity was proved by monitoring 6 kinds of heavy metals Pb, Zn, Cu, Cd, Hg, As of bryophytes and their substrates from different areas in Xinlu Carlin gold deposit, that is waste residue field > barren rock field > relatively polluted area > clear area. It might be closely related to the mining and smelting. Obviously, further researches on bryophytes can be used to monitor the pollution of heavy metals in gold deposits.%研究发现新路卡林型金矿区苔藓植物有10科17属28种,其中,丛藓科有9种,占总数的32.14%,真藓科有8种,占总数的28.57%.真藓科和丛藓科为优势科.分析该卡林型金矿区4个生境的β多样性,发现废石区—废渣区与相对污染区—清洁区的β多样性指数差异最大,苔藓群落结构差异性最大,相似性成分最低.测定该矿区苔藓植物及相应基质的重金属元素Pb、Zn、Cu、Cd、Hg、As含量,发现这些重金属元素含量呈现了一定的规律性,即:废渣区>废石区>相对污染区>清洁区,这可能与金矿的开采和冶炼有密切联系.因此,通过对苔藓植物的深入研究,可用以监测卡林型金矿区重金属污染情况.

  4. 北京百花山自然保护区不同植被地面生苔藓植物物种多样性%Species Diversity of Floor Bryophytes in Different Vegetations in Baihua Mountain National Nature Reserve, Beijing, China

    Institute of Scientific and Technical Information of China (English)

    田晔林; 王文和; 颜亭玉; 李俊清

    2013-01-01

    By means of species similarity coefficient and species diversity index,the characteristics of species diversity of floor bryophytes in the Baihua Mountain National Nature Reserve in Beijing were studied.The results showed that there were 65 floor species (including subspecies and varieties) belonging to 31 genera of 13 families.Species composition,dominant families and dominant species were different in 8 kinds of vegetation,Pottiaceae and Bryaceae were the absolutefamilies in meadow and shrub,but the Entodontaceae was the most common family in forest vegetation.The species similarity between Pinus tabulaeformis forest and deciduous broadleaved forest was the highest (0.516 3),but meadow and Vitex negundo shrub between mostly forest vegetation were zero.The growth base was the most important environment factor related to the distribution of floor bryophytes,and the humidity,herbage coverage,litter coverage were also related to the distribution of the bryophytes on floor.Betula platyphylla forest and deciduous broadleaved forest were the center of bryophyte diversity and the key area for the bryophyte diversity conversation.%采用相似性系数和物种多样性指数对北京百花山自然保护区8种植被内地面生苔藓植物的物种多样性进行了研究,得知8种植被中地面生苔藓植物有13科31属65种(含种以下的单位),优势科6科,优势种12种.不同植被中苔藓植物的物种组成、优势科和优势种不同,丛藓科和真藓科植物在草甸和灌丛内占绝对优势,而森林植被内的绢藓科为绝对优势科;油松林和落叶阔叶混交林的物种相似性最高为51.63,草甸和荆条灌丛与大部分植被的物种相似为0.地面生苔藓植物的分布与其生长的基质相关性最大,另外水分条件、小生境、草本层盖度和凋落物盖度等也影响地面生苔藓植物的分布.白桦林和落叶阔叶混交林应成为生物多样性保护的重点植被类型.

  5. 四川盆周西缘山地典型人工林下苔藓和凋落物的持水特性%Water Holding Capacities of Bryophyte and Litter Layer under Typical Artificial Stands of Western Sichuan Ba-sin Border

    Institute of Scientific and Technical Information of China (English)

    肖玖金; 马海燕; 张晓庆; 张健; 朱必清

    2014-01-01

    In order to study the water holding capacities of artificial stands, the field survey and the water immersion were con-ducted to study the water holding capacities of bryophyte and litter layer including un-decomposed litter layer and incom-pletely and completely decomposed under typical artificial stands of western Sichuan basin border.The highest storage a-mount bryophyte was in mixed forest, and the lowest storage amount bryophyte was in Cryptomeria fortune artificial stands. Phoebe zhennan had the highest storage amount of litter, and C.fortune had the lowest storage amount of litter.There were no significant different water holding capacities between C.fortune and M.glyptostroboides, P.zhennan and mixed forest, respectively.The water holding capacities in F, H layer was higher than that in L layer in both C.fortune and M.glyp-tostroboides artificial stands, respectively, and F,H layer was lower than that in L layer were in both P.zhennan and mixed forest, respectively.The water holding rate of bryophyte decreased quickly in the first two hours, and litter decreased quickly in the first six hours.Water absorption rates of bryophyte layer under all stands decreased according to V=ktb with time immersed in water in significance level.%为了解人工林生态系统的持水性特征,采用野外实地观测和室内浸水法对3种主要人工林下苔藓和凋落物层(未分解层、半分解和分解层)的持水特性进行了研究。结果显示:①苔藓层蓄积量以混交林最高(0.52 t· hm-2),柳杉林最低(0.10 t· hm-2);凋落物层均以楠木林最高,柳杉林最低。②柳杉和水杉林间、楠木和混交林间苔藓层最大持水性差异均不明显;柳杉和水杉林凋落物半分解层和已分解层最大持水率大于未分解层,而楠木和混交林则是未分解层大于半分解层和已分解层。③各林分苔藓层吸水速率到2h后均趋于平缓,凋落物半分解层和已

  6. 张家湾子金矿苔藓植物物种多样性及其对重金属污染的监测%Bryophyte species diversity and its indicative roles in monitoring heavy metals pollution in Zhangjiawanzi gold deposit area of Guizhou Province, Southwest China

    Institute of Scientific and Technical Information of China (English)

    左思艺; 王智慧; 张朝晖

    2013-01-01

    调查了贵州省张家湾子金矿苔藓植物,并利用原子荧光光谱仪AF-640和AAnalyst800原子吸收光谱仪,对重污染区、相对污染区和清洁区苔藓植物优势种及土壤基质6种重金属元素(Cu、Zn、Cd、Pb、Hg、As)含量进行测定.在该金矿共采集苔藓样品75份,鉴定为9科16属23种.优势科为丛藓科和真藓科,生活型主要有4种:矮丛集型、高丛集型、交织型和平铺型,矮丛集型以80.3%占绝对优势.重金属含量测定结果表明,该矿区受Hg、As、Cd污染严重;硬叶净口藓对Cd的富集系数为5.58,属于强烈富集;匐灯藓对Cd富集系数为1.64,属于相对富集.苔藓与土壤重金属含量呈正相关,苔藓植物能监测该矿区重金属污染.%An investigation was conducted on the bryophytes in Zhangjiawanzi gold deposit area of Guizhou Province, and the fluorescence spectroscopy (AF-640 ) and absorption spectrophotom-eter AAnalyst 800 were used to measure the concentrations of 6 heavy metals (Cu, Zu, Cd, Pb, Hg, and As) in the dominant bryophyte species and soils in heavily polluted area, relatively pol-luted area, and clean area. A total of 75 bryophyte samples were collected, belonging to 23 spe-cies, 16 genera, and 9 families. The dominant families were Pottiaceae and Bryaceae, whose life-forms were mainly of short turfs, tall turfs, wefts, and mats. The short turfs were significantly dominant, taking up 80. 3% of the total life-forms. The measurement of the heavy metals concen-trations indicated that this gold deposit area was heavily polluted by Hg, As, and Cd. The en-richment coefficient of Cd by Cymnostomum subrigidulum and Plagiomnium cuspidatum was 5. 58 and 1.64, belonging to intensive and relative enrichment, respectively. The concentrations in the bryophytes and soils had a significant positive correlation, suggesting that bryophytes could be used for the monitoring of heavy metals pollution in this gold deposit area.

  7. 喀斯特石漠生态系统不同自然演替阶段中苔藓植物多样性特征分析%Analysis of Bryophytes Diversity Features in Various Successional Stages of a Karst Rocky Desertification Ecosystem

    Institute of Scientific and Technical Information of China (English)

    籍烨; 张朝晖

    2014-01-01

    以“空间代替时间”方法研究了贵州喀斯特石漠地区植被自然恢复演替过程中各演替阶段苔藓植物的群落特征及苔藓植物物种a和β多样性指数.研究结果表明:该区共有苔藓植物群落21种,并以美灰藓(Eurohypnum leptothallum)为优势物种.苔藓植物α多样性指数随演替阶段的发展,表现出先下降、再反弹(藤刺灌丛阶段)、最后再次降低的变化趋势.苔藓植物Pielou均匀度指数的大小表现为:苔藓群落阶段(0.9392)>乔灌丛阶段(0.8675)>藤刺灌丛阶段(0.8651)>草灌丛阶段(0.7677)>草丛阶段(0.7676).β多样性指数(So-renson多样性指数)分析表明,苔藓植物群落随着演替阶段的发展,相同种类的数目随之减少,群落间相似性系数也逐渐降低.虽然苔藓植物群落在草丛阶段和藤刺灌丛阶段的相似性高于草丛阶段和草灌丛阶段之间的相似性系数,但总的相似性系数却呈现下降趋势.该研究结果可为喀斯特石漠生态系统演替的研究提供依据.%Using ‘space replacing time’ method,we studied the characteristics of bryophyte communities,as well as the α diversity and β diversity indices of bryophytes in various successional stages in a karst rocky desertification region in Guizhou.Results showed 21 bryophyte communities,with Eurohypnum leptothallum the dominant species in this area.For successional stages,the α diversity index gradually changed,first showing a downward trend,then rebounding in the lianas and boscage stage,and at last continuing to decline.The Pielou index indicated bryophyte community stage (0.9392) > arbor and shrubs stage (0.8675) > lianas and boscage stage (0.8651) > herbosa and boscage stage (0.7677) >herbosa stage (0.7676).For successional stages,the β diversity index (Sorenson index)showed consequent reduction in the number of the same species,and between communities the similarity coefficient gradually decreased.The similarity of

  8. Bryophytes Diversity and Flora in the Southern Greater Khingan Mountains%大兴安岭南部山地苔藓植物区系多样性研究

    Institute of Scientific and Technical Information of China (English)

    萨如拉; 白学良; 毕庚辰; 福英

    2013-01-01

    Bryological field investigations were carried out in the 6 nature reserves of Southern Greater Khingan Mountains during 2009~2012.We collected and identified approximately 1 800 specimens,then calculated and analyzed bryological composition and floristic characteristics of this area; similarity coefficient and euclidean distance of 10 mountains; the diversity index,the species richness,the evenness index and dominance index of 8 kinds of habitat.Our objectives were to provide basic data for construction and management of nature reserve.The results showed that:(1)There were a total of 330 species (including 15 varieties,2 forms and 1 subspecies) of bryophytes belonging to 134 genera and 48 families,among which there were 38 species and 1 varieties of liverworts belonging to 21 genera and 16 families and 274 species,14 varieties,2 forms and 1 subspecies of mosses belonging to 113 genera and 32 families in the 6 nature reserves of Southern Greater Khingan Mountains.(2)Reported 4 species new records of China (Grimmia longirostris Hook.,Schistidium lancifolium (Kindb.) Blom.,Bryum laevifilum Syed.,Homomallium adnatum (Hedw.) Broth.and 12 species new to this area.(3)Dominant families (e.g.Pottiaceae) in this area are adapted to arid habitats.The statistical analysis of the flora elements indicates that it has an absolutely dominant majority of north temperate elements and a proportion of East Asian elements,numbering 60.79%and 16.19%.(4)The region had the highest similarity with Northern Yanshan Mountains and Northern Greater Khingan Mountains;changes of the habitat conditions have certain effect on bryophytes diversity,which is the highest in wet soil habitat and wet rock habitat,the lowest in aquatic habitat.The study reflects that the bryoflora of Southern Greater Khingan Mountains is a transitional zone connecting North China region,North-Eastern China region,Inner Mongolia-Xinjiang region and Yinshan area; compared with Northern Yanshan Mountains and Northern

  9. Relationships between terrestrial bryophytes and eco-environmental factors in Baihua Mountain National Nature Reserve in Beij ing%北京百花山自然保护区地面生苔藓植物与生态环境的关系

    Institute of Scientific and Technical Information of China (English)

    田晔林; 王文和; 汪阗

    2014-01-01

    运用典范对应分析法,定量分析了北京百花山自然保护区37个森林植被样地中33种主要地面生苔藓植物与生态环境之间的关系,结果表明:该区森林植被样地与环境因子的关系呈现多元化特点:相同植被聚为一组、环境因子相似的植被聚为一组、植被相同环境因子不同归为不同组和生境特殊的植被自成一组。得出该区多数地面生苔藓植物的分布与乔木郁闭度的相关性最大且与人为干扰程度密切相关,少数种类与草本层盖度和灌木盖度呈正相关。此外凋落物盖度、海拔、苔藓植物的生长基质也直接影响苔藓植物的分布。%The method of Canonical Correspondence Analysis was used to analyzed the data of terrestrial bryophytes of 37 forest sites in Mt.Baihua.The relationships between the terrestrial bryophytes and the environmental variables were revealed in the biplots of CCA:same forests became a group,forests in similar environment get together,the same forest in different environment became a group and some forest in special environment gather a group.Bassed on the correlation coefficients of the environmental variables with the first two axes,the environmental variables that decided the distribution of the 33 bryophytes were canopy density,shrub coverage,altitude,base and human disturb-ance.CCA two-dimensional ordination diagram of 3 7 sites of forests-enviromental factors showed the diversities char-acter between the sites and environmental variables.

  10. Response and bioindicator of bryophyte and lichen as cryptogamae plants to environmental change%苔藓和地衣对环境变化的响应和指示作用

    Institute of Scientific and Technical Information of China (English)

    杨琳璐; 王中生; 周灵燕; 马元屾; 王志科; 营婷; 宋圆圆; 徐卫祥

    2012-01-01

    Non-vascular cryptogams, particularly bryophytes and lichens have been an important tool in the research of response and indicator to the global change because they are found in various habitats, their distributions as individual/ population/community are stable on a small-scale, and they are sensitive to environmental changes. The monitoring indices includes; (1) biomass of the species, abundance and diversity index of species; (2) correlation between certain element accumulation level within individual plant and the content of the element in the environment; (3) environment-induced changes in cell metabolic rate, photosynthetic rate and pigment content, and enzyme activities and concentrations; ( 4) integrated correlations between environmental factors and eco-physiological variables of monitored species and established monitoring models. However, responses of different species to environment changes were different. Research is needed in choosing suitable species for biomonitoring and the corresponding criteria, as well as in establishing reliable " specific pollutant-specific monitoring species-monitoring index" system.%隐花植物苔藓和地衣具有各类生境分布的广泛性、小范围内个体/种群/群落分布的稳定性、独特的生理特性及其对环境变化的生物敏感性,在环境变化响应与指示研究中已成为重要工具种.目前对隐花植物的监测指标包括:(1)物种生物量、种类组成及丰度指数等;(2)植株体内某元素积累量与环境含量间的相关性;(3)环境变化引起细胞代谢速率、光合速率、光合色素含量、各种酶含量及活性等的改变;(4)整合环境因子与监测种的生理生态指标间的相关性,构建监测模型.但不同物种对环境变化的响应存在差异性,选择合适的生物监测工具种及相应的监测指标,构建合理的“污染物类型-监测工具种-监测指标”的监测体系,将有利于进一步提升生物监测的可行性及可信度.

  11. Bryophyte floras of tropical Pacific islands

    OpenAIRE

    Miller, Harvey A.; Whittier, Henry O.

    1990-01-01

    A review of the status of bryological research in each of the nations, states or governmental units of southern Melanesia, Micronesia and tropical Polynesia shows the imperfect state of knowledge about the Pacific tropical islands. Best known overall are Hawaii and Micronesia with Wallis and Futuna, the Marquesas and the high mountains of Fiji seeming to be the least known potentially species rich areas. Involvement of residents from Pacific islands in botanical study and preservation of ecos...

  12. Bryology and Bryophytes at the Rijksherbarium

    NARCIS (Netherlands)

    Touw, A.

    1979-01-01

    The main task of the first directors of the Rijksherbarium consisted of the preparation of a catalogue of its Dutch East Indian and Japanese collections (cf. van Steenis-Kruseman’s paper in this volume). Among those who contributed to this catalogue was J. H. Molkenboer, a young physician who had gr

  13. Relative growth rate of rich fen bryophytes

    DEFF Research Database (Denmark)

    Andersen, Dagmar Kappel; Ejrnæs, Rasmus; Riis, Tenna

    Rigkær er blandt den nordlige halvkugles mest artsrige naturtyper, og en lang række sjældne og truede plantearter er knyttet til netop disse områder. I dette forsøg undersøges den relative vækstrate hos to almindelige og to sjældne rigkærsmosser i relation til forskellige niveauer af næringsstoff...

  14. Recurrent evolution of dioecy in bryophytes.

    Science.gov (United States)

    McDaniel, Stuart F; Atwood, John; Burleigh, J Gordon

    2013-02-01

    The origin and maintenance of separate sexes (dioecy) is an enduring evolutionary puzzle. Although both hermaphroditism and dioecy occur in many diverse clades, we know little about the long-term evolutionary consequences of changing sexual system. Here we find evidence for at least 133 transitions between sexual systems in mosses, representing an almost unparalleled lability in the evolution of their sexual systems. Furthermore, in contrast to predictions, the transition rate from hermaphroditism to dioecy was approximately twice as high as the reverse transition. Our results also suggest that hermaphrodites may have higher rates of diversification than dioecious mosses. These results illustrate the utility of mosses for understanding the genomic and macroevolutionary consequences of hermaphroditism and dioecy.

  15. Habitat fragnentation impacts on Epiphyllous Bryophyte communities in central Amazonia

    OpenAIRE

    Charles Eugene Zartman

    2003-01-01

    Tropical deforestation is a progressive process resulting in the conversion of rain forest into a mosaic of mature forest fragments, pasture, and degraded habitat. Understanding the long-term effects of habitat fragmentation on tropical plant community structure is critical to predicting how alterations to the landscape will impact tropical biodiversity. The objective of this study was to examine fragmentation effects on the composition, abundance, and species richness of epiphyllous (leaf-in...

  16. Species density of phanerogams and bryophytes in Dutch forests

    NARCIS (Netherlands)

    Dirkse, G.M.; Martakis, G.F.P.

    1998-01-01

    In Dutch forests the species density of vascular plants ranges from I to 61 species per 300 m2. The vascular plant species density is high in the coastal dunes, southern Limburg, river valleys, and fen areas. With the exception of southern Limburg, these areas constitute the Holocene part of the Net

  17. Evolutionary analysis of five bryophyte families using virtual fossils

    Directory of Open Access Journals (Sweden)

    Zander, Richard H.

    2009-12-01

    Full Text Available Traditional taxa paraphyletic or polyphyletic on a molecular phylogenetic tree may be interpreted as populations of surviving ancestors that are evolutionarily static in expressed traits though labile in DNA traits used to track genetic continuity. In those cases in which re-evolution (convergence of such taxa is deemed improbable, such heterophyly may be used to infer evolutionary series of virtual fossils reflecting macroevolution. Descent with modification of taxa is here demonstrated by reinterpreting published cladograms of molecular studies of Dicranaceae, Pottiaceae, Grimmiaceae, Hypopterygiaceae, and Mniaceae as taxon trees. Given this argument, superimposed inferred ancestors are support for the theory of punctuated equilibrium.

    Los táxones parafiléticos o polifiléticos tradicionales en un árbol molecular filogenético pueden interpretarse como poblaciones de ancestros supervivientes que están evolutivamente estáticos en los caracteres expresados a través de lábiles en los caracteres ADN que se emplean para seguir la continuidad genética. En esos casos en los cuales la re-evolución (convergencia de tales táxones se considere improbable, la heterofilia puede usarse para inferir series evolutivas de fósiles virtuales que reflejan la macroevolución. El descenso con modificación de táxones se demuestra con la interpretación publicada de los cladogramas de estudios moleculares de Dicranaceae, Pottiaceae, Grimmiaceae, Hypopterygiaceae y Mniaceae como árboles taxonómicos. En vista de este argumento, resulta que los ancestros inferidos superimpuestos apoyan la teoría del equilibrio puntuado.

  18. NEW RECORD AND ADDITIONS TO THE ARGENTINEAN BRYOPHYTE FLORA

    Directory of Open Access Journals (Sweden)

    Esther Fuertes

    2014-01-01

    Full Text Available Steereella lilliana se registra como una nueva cita para la flora briofítica de Argentina y Sudamérica. Además, se amplía la distribución de Frullania brasiliensis en Argentina, antes solo conocida para las provincias de Misiones y Salta, y ahora presente en las provincias de Tucumán y Córdoba. A su vez, Stephaniella paraphyllina , es una novedad para la provincia de San Luis, recolectada en la Sierra de Comechingones, representando éste su límite sur de distribución. Se aportan comentarios sobre la mor - fología, claves para las especies cercanas en Argentina y datos de hábitat.

  19. Probing Cytological and Reproductive Phenomena by Means of Bryophytes.

    Science.gov (United States)

    Newton, M. E.

    1985-01-01

    Describes procedures (recommended for both secondary and college levels) to study mitosis, Giemsa C-banding, reproductive phenomena (including alternation of generations), and phototropism in mosses and liverworts. (JN)

  20. Problems of shape characterization and comparison in bryophytes

    Directory of Open Access Journals (Sweden)

    Jerzy Szweykowski

    2014-01-01

    Full Text Available Shapes of leaves of two liverwort species, viz. Lophozia ventricosa and Lophozia silvicola, were characterized by means of three different methods: polar coordinates, conics, and Fourier series. Results were then used to compare the leaf shapes of the two taxa, and differentiate between their leaves. Characterization by Fourier series gave the most reliable results.

  1. Bryophytes collected during a Dutch botanical East Greenland expedition to the Angmagsslalik area in 1966

    NARCIS (Netherlands)

    Molenaar, de J.G.

    1968-01-01

    From a bryological point of view Greenland is not well known in detail. Unlike Siberia or Arctic America, it is not known through a few large collections, but through multitudes of mostly relatively small gatherings. In this arctic island that is almost 2000 miles long and extends from below 60° N.l

  2. A new species of Cladophialophora (hyphomycetes) from boreal and montane bryophytes.

    Science.gov (United States)

    Davey, Marie L; Currah, Randolph S

    2007-01-01

    During a survey of bryophilous fungi from boreal and montane habitats in central Alberta, a hitherto undescribed species of Cladophialophora was recovered from Polytrichum juniperinum, Aulacomnium palustre, and Sphagnum fuscum. On potato dextrose agar (PDA) colonies grew slowly, attaining a diameter of 25 mm after 30 d, were dark grey, velvety, radially sulcate, and convolute and cracked at the centre. Micronematous conidiophores gave rise to branched chains of small (1-2 x 8-22 microm), cylindrical to fusiform conidia with truncate, swollen scars at each end. Phylogenies built on the ITS and ribosomal SSU regions indicate the isolates form a monophyletic clade within the family Herpotrichiellaceae (Chaetothyriales) that is composed of two geographically based groups, each with 99% within-group sequence similarity and 97-98% between-group sequence similarity. A teleomorph has not been found but would likely be similar to species of Capronia. In vitro inoculation of the isolates onto axenically grown P. juniperinum produced no discernible host symptoms, and host penetration could not be detected using light microscopy. The production of polyphenol oxidases by the fungus and the role of other Cladophialophora species as latent endophytes and saprobes suggest that a potential role for the fungus is the degradation of the polyphenol-rich cell walls of mosses. A dichotomous key to species of the genus Cladophialophora is provided.

  3. Altitude affects the reproductive performance in monoicous and dioicous bryophytes: examples from a Brazilian Atlantic rainforest

    OpenAIRE

    MACIEL-SILVA,ADAÍSES S.; Marques Valio, Ivany F.; Rydin, HÅkan

    2012-01-01

    Species traits, such as breeding system, phylum and growth form and habitat characteristics are shown to influence reproductive performance of liverworts and mosses in the Brazilian Atlantic Rainforest, and drive life-history differentiation among species and populations.

  4. Vegetation of Europe: hierarchical floristic classification system of vascular plant, bryophyte, lichen, and algal communities

    NARCIS (Netherlands)

    Mucina, L.; Bültmann, Helga; Dierssen, Klaus; Theurillat, Jean-Paul; Raus, Thomas; Carni, Andraz; Šumberová, Kateřina; Willner, Wolfgang; Dengler, J.; Schaminee, J.H.J.; Hennekens, S.M.

    2016-01-01

    Aims: Vegetation classification consistent with the Braun-Blanquet approach is
    widely used in Europe for applied vegetation science, conservation planning
    and landmanagement. During the long history of syntaxonomy,many concepts
    and names of vegetation units have been proposed, but there

  5. Syntrichia minor (Pottiaceae and Cephaloziella integerrima (Cephaloziellaceae new to bryophyte flora of Turkey

    Directory of Open Access Journals (Sweden)

    Ören Muhammet

    2015-01-01

    Full Text Available Syntrichia minor (Bizot M.T. Gallego, J. Guerra, M.J. Cano, Ros & Sánchez-Moya (Pottiaceae, Bryophyta - mosses and Cephaloziella integerrima (Lindb. Warnst. (Cephaloziellaceae, Marchantiophyta - liverworts are recorded for the first time from Turkey. In addition, the rare C. integerrima is new to Southwest Asia. These species were collected from the northern part of Turkey, respectively Karabük (Safranbolu and Kastamonu (Bozkurt. Site description, synonyms, illustrations, ecology, distribution and diagnostic characters of these species are presented.

  6. A catalogue of the Bryophytes of the Guianas I. Hepaticae and Anthocerotae

    NARCIS (Netherlands)

    Gradstein, S.R.; Hekking, W.H.A.

    1985-01-01

    This catalogue provides an annotated listing of the liverworts and hornworts from the Guianas (Guyana, Surinam, French Guiana), based on the literature and on new data that have become available in the framework of the “Flora of the Guianas” project. In total 375 species in 93 genera are recorded, i

  7. Bryophyte-feeding of Litoleptis (Diptera: Rhagionidae) with descriptions of new species from Japan.

    Science.gov (United States)

    Imada, Yume

    2016-03-29

    Here we report the larval phytophagous habit of Litoleptis for the first time, and describe six new species of Litoleptis in Japan; L. japonica n. sp., L. kiiensis n. sp., L. niyodoensis n. sp., L. himukaensis n. sp., L. izuensis n. sp., and L. asterellaphile n. sp. All the species described here are thallus-miners of liverworts belonging to Aytoniaceae and Conocephalaceae (Marchantiopsida: Marchantiophyta). Each fly species mined thalli of only one of the following genera: Conocephalum, Reboulia, and Asterella. The descriptions of the Japanese Litoleptis species here expand the concept of this genus. The female genital morphology of Litoleptis strengthened the current placement of Litoleptis as a member of Spaniinae.

  8. The current distribution in Poland of some European neophytic bryophytes with supposed invasive tendencies

    Directory of Open Access Journals (Sweden)

    Ewa Fudali

    2011-01-01

    Full Text Available The paper presents a brief review of published so far and recently recorded unpublished bryological data concerning the distribution in Poland of two neophytic (sensu Meusel 1943 mosses: Campylopus introflexus (Hedw. Brid. and Orthodontium lineare Schwaegr.to estimate their current influence on native bryoflora. The data clearly indicate the constant spreading of these species towards the east, however, there is no direct evidence that they have been limiting the occurrence of native moss species. They are acidophilous species, so the acidification of the environment probably promotes their expansion. Maps of the most current distribution of Campylopus introflexus and Orthodontium lineare in Poland (in a system of ATMOS-grid squares are provided, as well as a description of the first locality in Poland of another European bryo-neophyte species Leptophascum leptophyllum Mull. Hal.

  9. Identification and characterization of a symbiotic alga from soil bryophyte for lipid profiles

    Science.gov (United States)

    Feng, Jia; Guo, Yuning; Zhang, Xiujuan; Wang, Guihua; Lv, Junping; Liu, Qi; Xie, Shulian

    2016-01-01

    ABSTRACT A symbiotic alga was successfully isolated from the soil moss Entodon obtusatus found in the Guandi Mountains, Shanxi Province, China, and cultivated under axenic conditions. Morphological observations showed that the symbiotic alga was similar to Chlorococcum. Based on phylogenetic analysis of 18S rRNA and rbcL genes and internal transcribed spacer (ITS) regions, Chlorococcum sp. GD was identified as Chlorococcum sphacosum. The three data sets were congruent for those aspects of the topologies that were relatively robust, and differed for those parts of the topologies that were not. This strain was cultured in BG11 medium to test its growth and biodiesel properties. It produced a lipid content of nearly 40%, and achieved biomass concentration of 410 mg l−1 and lipid productivity of 6.76 mg l−1 day−1, with favorable C16:0 (23.10%) and C18:1 (21.62%) fatty acid content. This alga appears to have potential for use in biodiesel production. PMID:27543061

  10. Identification and characterization of a symbiotic alga from soil bryophyte for lipid profiles

    Directory of Open Access Journals (Sweden)

    Jia Feng

    2016-09-01

    Full Text Available A symbiotic alga was successfully isolated from the soil moss Entodon obtusatus found in the Guandi Mountains, Shanxi Province, China, and cultivated under axenic conditions. Morphological observations showed that the symbiotic alga was similar to Chlorococcum. Based on phylogenetic analysis of 18S rRNA and rbcL genes and internal transcribed spacer (ITS regions, Chlorococcum sp. GD was identified as Chlorococcum sphacosum. The three data sets were congruent for those aspects of the topologies that were relatively robust, and differed for those parts of the topologies that were not. This strain was cultured in BG11 medium to test its growth and biodiesel properties. It produced a lipid content of nearly 40%, and achieved biomass concentration of 410 mg l−1 and lipid productivity of 6.76 mg l−1 day−1, with favorable C16:0 (23.10% and C18:1 (21.62% fatty acid content. This alga appears to have potential for use in biodiesel production.

  11. Preliminary list of bryophytes of Heishiding Nature Reserve, Guangdong Province, China

    OpenAIRE

    1994-01-01

    Thirty-seven species of hepatics and 66 species of mosses are reported from Heishiding Nature Reserve, including eight taxa new to China and one species new to mainland China. The new taxa for China are Ectropothecium aneitense Broth., Gammiella tonkinensis (Broth. & Par.) Tan, G. touwii Tan, Hypnum fauriei Card., Papillidiopsis complanata (Dix.) Buck & Tan, Syrrhopodon prolifer Schwaegr. var. papillosum (C.Müll.) Reese, Trichosteleum pseudo-mammosum Fleisch., and Trichostomum crispulum Bruch...

  12. Can bryophytes be used to characterize hydrologic permanence in forested headwater streams?

    Science.gov (United States)

    Recent court cases have questioned whether all headwater streams, particularly those that are not perennial, fall within the protective boundaries of the Clean Water Act. Rapid field-based indicators of hydrologic permanence are critically needed for jurisdictional determination...

  13. AQUATIC BRYOPHYTES IN HIMALAYAN STREAMS: TESTING A DISTRIBUTION MODEL IN A HIGHLY HETEROGENOUS ENVIRONMENT. (U915444)

    Science.gov (United States)

    The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Concl...

  14. Are bryophytes useful indicators of hydrologic permanence in forested headwater streams?

    Science.gov (United States)

    Court cases have recently questioned whether all headwater streams, particularly non-perennial streams, should be protected in the U.S. under the Clean Water Act. Rapid field-based indicators of hydrologic permanence are needed for jurisdictional determinations. The study objecti...

  15. [Vertical stratification of epiphytic bryophytes found on Quercus humboldtii (Fagaceae) from boyacá, Colombia].

    Science.gov (United States)

    Gil Novoa, Jorge Enrique; Morales Puentes, María Eugenia

    2014-06-01

    Oak forest represents an ecologically important plant formation in Colombia, partly due to the large amount of epiphyte flora that harbors, especially non-vascular plants which have been poorly studied in Colombia. One of the biggest oak forests in the country is the one found in the Parque Natural Municipal "Robledales de Tipacoque" (PNMRT), in Boyacá, municipality of Tipacoque. The epiphyte bryoflora was evaluated in Q. humboldtii, using canopy climbing techniques and dividing the trees (25 individuals sampled) each into five layers (base, trunk, inner canopy, middle and outer canopy). A total of 365 samples were collected: 29% liveworts and 71% mosses. Hepatics represented 10 families, 16 genera and 26 species; mosses 11 families, 26 genera and 49 species. Considering the tree layers, the most diverse one was the base with 51 species, followed by the trunk with 43; in the canopy, the inner canopy was found the most diverse with 28 species, and was followed by the middle canopy with 18, and the outer canopy with 15. A species similarity index shows that the trunk and the middle canopy were the most closely related (0.42) in terms of species composition. The results showed that non-vascular plants were mostly found in lower layers (base and trunk), where the diversity was greater, richer (species number), and this might be caused by the microclimatic conditions in these places, such as higher humidity, lower light intensity and shade. Thus, some species are considered shade epiphytes (ombrophiles) because they are unique to these areas, like Bazzania gracilis and Taxilejeunea pterigonia, among others. Likewise, Jungermannia sp. is considered a sun epiphyte (heliophilous) because it is found only in the outer canopy. We concluded that Q. humboldtii could be considered as a potential host for the conservation of non-vascular epiphytes in Colombian forests.

  16. Switch between competition and facilitation within a seasonal scale at colony level in bryophytes.

    Science.gov (United States)

    Spitale, Daniel

    2009-06-01

    The relative importance of positive and negative interaction in species assemblages is thought to be dependent on the harshness of the physical environment. I studied the consistency of this prediction in a field experiment using growth of the target species Warnstorfia exannulata as influenced by the presence or absence of two adjacent species, Sphagnum warnstorfii and Scapania undulata. In particular, I focused on the mechanism by which colony-colony interactions occur, elucidating how the balance of positive and negative interactions changes along a water gradient. Because the natural fluctuations of the environment modify the water gradient, it was expected that the competitive hierarchies of the species would not remain consistent over time. Results indicated that the different hydrological properties of the colonies, thought to be the necessary condition for the appearance of species interactions, were not sufficient to explain the outcome of the species interactions. The switch from competition to facilitation under more stressful conditions was not confirmed along a water stress gradient. In addition, natural climatic fluctuations, by affecting the length of the water gradient, changed the competitive hierarchies of the species on a seasonal scale.

  17. Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes.

    Science.gov (United States)

    Cruz de Carvalho, Ricardo; Catalá, Myriam; Branquinho, Cristina; Marques da Silva, Jorge; Barreno, Eva

    2017-03-01

    Desiccation tolerant (DT) organisms are able to withstand an extended loss of body water and rapidly resume metabolism upon rehydration. This ability, however, is strongly dependent on a slow dehydration rate. Fast dehydration affects membrane integrity leading to intracellular solute leakage upon rehydration and thereby impairs metabolism recovery. We test the hypothesis that the increased cell membrane damage and membrane permeability observed under fast dehydration, compared with slow dehydration, is related to an increase in lipid peroxidation. Our results reject this hypothesis because following rehydration lipid peroxidation remains unaltered, a fact that could be due to the high increase of NO upon rehydration. However, in fast-dried samples we found a strong signal of red autofluorescence upon rehydration, which correlates with an increase in ROS production and with membrane leakage, particularly the case of phenolics. This could be used as a bioindicator of oxidative stress and membrane damage.

  18. From Trace Evidence to Bioinformatics: Putting Bryophytes into Molecular Biology Education

    Science.gov (United States)

    Fuselier, Linda; Bougary, Azhar; Malott, Michelle

    2011-01-01

    Students benefit most from their science education when they participate fully in the process of science in the context of real-world problems. We describe a student-directed open-inquiry lab experience that has no predetermined outcomes and requires students to engage in all components of scientific inquiry from posing a question through…

  19. [Conserved motifs in the primary and secondary ITS1 structures in bryophytes].

    Science.gov (United States)

    Milyutina, I A; Ignatov, M S

    2015-01-01

    A study of the ITS1 nucleotide sequences of 1000 moss species of 62 families, 11 liverwort species from five orders, and one hornwort Anthoceros agrestis identified five highly conserved motifs (CM1-CM5), which are presumably involved in pre-rRNA processing. Although the ITS1 sequences substantially differ in length and the extent of divergence, the conserved motifs are found in all of them. ITS1 secondary structures were constructed for 76 mosses, and main regularities at conserved motif positioning were observed. The positions of processing sites in the ITS1 secondary structure of the yeast Saccharomyces cerevisiae were found to be similar to the positions of the conserved motifs in the ITS1 secondary structures of mosses and liverworts. In addition, a potential hairpin formation in the putative secondary structure of a pre-rRNA fragment was considered for the region between ITS1 CM4-CM5 and a highly conserved region between hairpins 49 and 50 (H49 and H50) of the 18S rRNA.

  20. Ecophysiology of photosynthesis in bryophytes: major roles for oxygen photoreduction and non-photochemical quenching?

    Science.gov (United States)

    Proctor, Michael C F; Smirnoff, Nicholas

    2011-02-01

    CO(2) fixation in mosses saturates at moderate irradiances. Relative electron transport rate (RETR) inferred from chlorophyll fluorescence saturates at similar irradiance in shade species (e.g. Plagiomnium undulatum, Trichocolea tomentella), but many species of unshaded habitats (e.g. Andreaea rothii, Schistidium apocarpum, Sphagnum spp. and Frullania dilatata) show non-saturating RETR at high irradiance, with high non-photochemical quenching (NPQ). In P. undulatum and S. apocarpum, experiments in different gas mixtures showed O(2) and CO(2) as interchangeable electron sinks. Nitrogen + saturating CO(2) gave high RETR and depressed NPQ. In S. apocarpum, glycolaldehyde (inhibiting photosynthesis and photorespiration) depressed RETR in air more at low than at high irradiance; in CO(2) -free air RETR was maintained at all irradiances. Non-saturating electron flow was not suppressed in ambient CO(2) with 1% O(2) . The results indicate high capacity for oxygen photoreduction when CO(2) assimilation is limited. Non-saturating light-dependent H(2) O(2) production, insensitive to glycolaldehyde, suggests that electron transport is supported by oxygen photoreduction, perhaps via the Mehler-peroxidase reaction. Consistent with this, mosses were highly tolerant to paraquat, which generates superoxide at photosystem I (PSI). Protection against excess excitation energy in mosses involves high capacity for photosynthetic electron transport to oxygen and high NPQ, activated at high irradiance, alongside high reactive oxygen species (ROS) tolerance.

  1. 驯鹿对苔藓植物的选择食用及其生境的物种多样性%The bryophyte consumed by reindeers and species diversity of bryophyte in reindeer habitats

    Institute of Scientific and Technical Information of China (English)

    冯超; 白学良

    2011-01-01

    苔藓植物由于含有较高浓度的不饱和脂肪酸尤其是花生四烯酸可以提高动物的御寒能力,因此驯鹿和其他许多生活在寒冷地区的食草动物以及鸟类将苔藓作为主要的食物来源.对生活在内蒙古大兴安岭满归敖鲁古雅民族乡的驯鹿3个月份的粪便(1999年采)进行了显微观察,发现其中苔藓植物在4月份占5.63%、6月份2.2%、9月份12.92%,3个月份的粪便中均以赤茎藓(Pleurozium schreberi)为主,占苔藓总量的70%以上,曲尾藓(Dicranum spp.)、毛叶苔(Ptilidium ciliare)和沼泽皱蒴藓(Aulacomnium palustre)也有少量食用.对驯鹿生活区域内4种林型下苔藓植物的盖度和生物量的测定结果表明,驯鹿对苔藓植物的选择食用与苔藓植物的物种和丰富度相关.

  2. 贵州梵净山旅游线路苔藓植物及药用苔藓资源调查%Investigation on Bryophytes and Medicinal Bryophytes in Tourist Route of Fanjingshan Nature Reserve of Guizhou Province

    Institute of Scientific and Technical Information of China (English)

    王美会; 杨冰; 曹威; 陈敏

    2013-01-01

    为了摸清贵州梵净山自然保护区旅游线路苔藓植物资源状况,该文对贵州梵净山自然保护区旅游线路上的苔藓植物资源进行调查,结果发现该地区苔藓植物共有29科51属102种(包括亚种和变种),其中包括13种药用苔藓.

  3. Musci austro-africani II. Bryophyte collections in southern Africa and southern African type specimens in the National Herbarium, Pretoria

    Directory of Open Access Journals (Sweden)

    R. E. Magill

    1980-12-01

    Full Text Available A brief review of bryological collections and collectors in southern Africa introduces a catalogue of southern African type specimens housed in the National Herbarium, Pretoria. The type catalogue, arranged alphabetically by basionym, includes correct names, type status and label data.

  4. Purification of Two Novel Sugar Acid-binding Lectins from Haplomitrium Mnioides (bryophyte, Plantae) and their Preliminary Characterization.

    Science.gov (United States)

    Masuzaki, Hiroaki; Hosono, Masahiro; Nitta, Kazuo

    2017-01-01

    Two novel sugar acid-binding lectins were purified from Haplomitrium mnioides (Lindb.) Schust. using a procedure consisting of ammonium sulfate precipitation, G-50 gel filtration, hydroxyapatite chromatography, and HW-50 gel filtration. We reported their partial physicochemical properties: molecular weight, affinity for carbohydrates and organic acids, pH stability, and dependence of their hemagglutination activity on metal ions. We also determined their N-terminal amino acid sequences. H. mnioides lectins (HMLs) were monomers (one with a molecular weight of approximately 27 kDa, and the other with a molecular weight of approximately 105 kDa) under both nonreducing and reducing conditions. They were named HML27 and HML105, respectively. Both HMLs had an affinity for N-acetylneuraminic acid, D-glucuronic acid, D-glucaric acid, bovine submaxillary mucin, heparin, and organic acids, such as citrate, 2-oxoglutaric acid, and D-2-hydroxyglutarate. Furthermore, HML27 had an affinity for α-D-galacturonic acid, D-malate, L-malate, and pyruvate, while HML105 had an affinity for D-gluconic acid. HML27 and HML105 are novel plant lectins: they have an affinity for sugar acids and organic acids and specifically recognize the carboxyl group, and there is no homology between their N-terminal amino acid sequences and those of the previously described lectins and agglutinins.

  5. Axenically culturing the bryophytes: A case study of the liverwort Marchantia polymorpha L. ssp. ruderalis Bischl. & Boisselier (Marchantiophyta, Marchantiaceae)

    OpenAIRE

    Vujičić, Milorad; Cvetić, Tijana; Sabovljević, Aneta; Sabovljević, Marko; id_orcid 0000-0001-5809-0406

    2010-01-01

    Axenic culture of Marchantia polymorpha ssp. ruderalis were establish from the gemmae. The most appropariate condition of culturing were searched concerning mineral nutrition, light and temperature with other invariable conditions. The best material to start aseptic in vitro culture were to use gemmae and to use commercial bleach for surface sterilization (7%). The fully developed plants developed in long day condition at mild temperature 18-20°C and high humidity. The best biomass yields wer...

  6. Contrasting species-environment relationships in communities of testate amoebae, bryophytes and vascular plants along the fen-bog gradient.

    Science.gov (United States)

    Lamentowicz, Mariusz; Lamentowicz, Lukasz; van der Knaap, Willem O; Gabka, Maciej; Mitchell, Edward A D

    2010-04-01

    We studied the vegetation, testate amoebae and abiotic variables (depth of the water table, pH, electrical conductivity, Ca and Mg concentrations of water extracted from mosses) along the bog to extremely rich fen gradient in sub-alpine peatlands of the Upper Engadine (Swiss Alps). Testate amoeba diversity was correlated to that of mosses but not of vascular plants. Diversity peaked in rich fen for testate amoebae and in extremely rich fen for mosses, while for testate amoebae and mosses it was lowest in bog but for vascular plants in extremely rich fen. Multiple factor and redundancy analyses (RDA) revealed a stronger correlation of testate amoebae than of vegetation to water table and hydrochemical variables and relatively strong correlation between testate amoeba and moss community data. In RDA, hydrochemical variables explained a higher proportion of the testate amoeba and moss data than water table depth. Abiotic variables explained a higher percentage of the species data for testate amoebae (30.3% or 19.5% for binary data) than for mosses (13.4%) and vascular plants (10%). These results show that (1) vascular plant, moss and testate amoeba communities respond differently to ecological gradients in peatlands and (2) testate amoebae are more strongly related than vascular plants to the abiotic factors at the mire surface. These differences are related to vertical trophic gradients and associated niche differentiation.

  7. Novos registros de briófitas para Pernambuco, Brasil New records of bryophytes for the Pernambuco State, Brazil

    Directory of Open Access Journals (Sweden)

    Shirley Rangel Germano

    2004-06-01

    Full Text Available Os novos registros são provenientes de um remanescente de Floresta Atlântica, a Reserva Ecológica do Gurjaú (08º10'00'' e 08º15'00''S; 35º02'30'' e 35º05'00''O, situada na região metropolitana do Recife, Pernambuco. São oito espécies de Lejeuneaceae: Archilejeunea auberiana (Mont. A. Evans, Cololejeunea cardiocarpa (Mont. A. Evans, Colura greig-smithii Jovet-Ast, Diplasiolejeunea cobrensis Gottsche ex Steph., Harpalejeunea stricta (Lindenb. & Gottsche Steph., Lejeunea caespitosa Lindenb., L. monimiae (Steph. Steph., L. quinqueumbonata Spruce,e uma de Bryaceae: Bryum pabstianum C. Muell. São apresentadas ilustrações, comentários taxonômicos e ecológicos, e distribuição geográfica das espécies no Brasil.The new records were found in an Atlantic Forest remnant (tropical lowland rainforest, Reserva Ecológica do Gurjaú (08º10'00'' and 08º15'00''S; 35º02'30'' and 35º05'00''W, situated in the metropolitan area of Recife, Pernambuco State, Northeastern Brazil. The new occurrence corresponds to eight species of Lejeuneaceae: Archilejeunea auberiana (Mont. A. Evans, Cololejeunea cardiocarpa (Mont. A. Evans, Coluragreig-smithii Jovet-Ast, Diplasiolejeunea cobrensis Gottsche ex Steph., Harpalejeunea stricta (Lindenb. & Gottsche Steph., Lejeunea caespitosa Lindenb., L. monimiae (Steph. Steph., L. quinqueumbonata Spruce, and a Bryaceae: Bryum pabstianum C. Muell. Illustrations, floristic and ecological comments, and geographical distribution in Brazil are given for each species.

  8. Regulation of methane production, oxidation, and emission by vascular plants and bryophytes in ponds of the northeast Siberian polygonal tundra

    Science.gov (United States)

    Knoblauch, Christian; Spott, Oliver; Evgrafova, Svetlana; Kutzbach, Lars; Pfeiffer, Eva-Maria

    2015-12-01

    Methane (CH4) production, oxidation, and emission were studied in ponds of the permafrost-affected polygonal tundra in northeast Siberia. Microbial degradation of organic matter in water-saturated soils is the most important source for the climate-relevant trace gas CH4. Although ponds and lakes cover a substantial fraction of the land surface of northern Siberia, data on CH4 fluxes from these water bodies are scarce. Summer CH4 fluxes were measured with closed chambers at the margins of ponds vegetated by vascular plants and in their centers without vascular plants. Furthermore, CH4 and oxygen concentration gradients, stable carbon isotope signatures of dissolved and emitted CH4, and microbial CH4 production and CH4 oxidation were determined. Mean summer fluxes were significantly higher at the margins of the ponds (46.1 ± 15.4 mg CH4 m-2 d-1) than at the centers (5.9 ± 8.2 mg CH4 m-2 d-1). CH4 transport was dominated by diffusion in most open water sites, but substantial ebullitive fluxes (12.0 ± 8.1 mg CH4 m-2 d-1) were detected in one pond. Plant-mediated transport accounted for 70 to 90% of total CH4 fluxes above emerged vegetation. In the absence of vascular plants, 61 to 99% of the CH4 produced in the anoxic bottom soil was consumed in a layer of the submerged moss Scorpidium scorpioides, which covered the bottoms of the ponds. The fraction of CH4 oxidized was lower at sites with vascular plants since CH4 was predominantly transported through their aerenchyma, thereby bypassing the CH4 oxidation zone in the moss layer. These results emphasize the importance of moss-associated CH4 oxidation causing low CH4 fluxes from the studied Siberian ponds.

  9. Identifying the origin of atmospheric inputs of trace elements in the Prades Mountains (Catalonia) with bryophytes, lichens, and soil monitoring.

    Science.gov (United States)

    Achotegui-Castells, Ander; Sardans, Jordi; Ribas, Àngela; Peñuelas, Josep

    2013-01-01

    The biomonitors Hypnum cupressiforme and Xanthoria parietina were used to assess the deposition of trace elements and their possible origin in the Prades Mountains, a protected Mediterranean forest area of NE Spain with several pollution sources nearby. Al, As, Cd, Co, Cu, Cr, Ni, Pb, Sb, Ti, V, and Zn were determined in 16 locations within this protected area. Soil trace element concentrations were also ascertained to calculate enrichment factors (EF) and use them to distinguish airborne from soilborne trace element inputs. In addition, lichen richness was measured to further assess atmospheric pollution. EF demonstrated to be useful not only for the moss but also for the lichen. Cd, Cr, Cu, Ni, and Zn presented values higher than three in both biomonitors. These trace elements were also the main ones emitted by the potential sources of pollutants. The distance between sampling locations and potential pollution sources was correlated with the concentrations of Cu, Sb, and Zn in the moss and with Cr, Ni, and Sb in the lichen. Lichen richness was negatively correlated with lichen Cu, Pb, and V concentrations on dry weight basis. The study reflected the remarkable influence that the pollution sources have on the presence of trace elements and on lichen species community composition in this natural area. The study highlights the value of combining the use of biomonitors, enrichment factors, and lichen diversity for pollution assessment to reach a better overview of both trace elements' impact and the localization of their sources.

  10. Briófitas da Serra de Itabaiana, Sergipe, Brasil The bryophytes from the Serra de Itabaiana, Sergipe, Brazil

    Directory of Open Access Journals (Sweden)

    Olga Yano

    1994-07-01

    Full Text Available Na Serra de Itabaiana, foram encontradas 15 espécies de musgos pertencentes a 14 gêneros de 11 famílias e 14 de hepáticas de oito gêneros de quatro famílias. Rectolejeunea pililoba (Spruce Schust. está sendo referida pela primeira vez para o Brasil. Destas espécies, 26 estão sendo referidas pela primeira vez para o estado.Fifteen species of mosses and fourteen species of liverworts are reported from Serra de Itabaiana, Sergipe, Brazil. The mosses are distributed among 14 genera and 11 families, and the liverworts for eight genera and four families. Rectolejeunea pililoba (Spruce Schust. is cited for the first time from Brazil. Altogether, 26 species are cited for the first time for the State.

  11. Transfer of natural and anthropogenic radionuclides to ants, bryophytes and lichen in a semi-natural ecosystem.

    Science.gov (United States)

    Dragović, Snezana; Howard, Brenda J; Caborn, Jane A; Barnett, Catherine L; Mihailović, Nevena

    2010-07-01

    Few data are available to quantify the transfer of both natural and anthropogenic radionuclides to detritivorous invertebrates to facilitate estimation of the internal dose to such biota in models used to assess radiation exposure. To enhance the available data, activity concentrations of (137)Cs, (40)K, (90)Sr, (239 + 240)Pu, (241)Am, (235)U and (238)U were measured in ants (Formicidae) and corresponding undisturbed soil collected from the Zlatibor mountain in Serbia and ant/soil concentration ratios (CR) calculated. The (241)Am concentration ratios for ants were fourfold higher than those calculated for ants in a previous study whereas they are similar to the more numerous data previously reported for a range of detritivorous invertebrates in other studies. CR values for (137)Cs in ants were similar to the few other reported values and slightly lower than those for a range of detritivorous invertebrates. Those for (239 + 240)Pu were slightly higher than those for ants in two other studies but they were close to upper limit of a range of data reported for detritivorous invertebrates. All the CR values will be included in a future revision of the ERICA Tool database and will particularly improve the information available for uranium.

  12. Bryophytes from the Republic of Equatorial Guinea (West Central Africa) : 4., notes on some nomina nuda from Annobon

    OpenAIRE

    Heras Pérez, Patxi; Infante Sánchez, Marta

    1999-01-01

    Eight moss species corresponding to nomina nuda recorded in the literature from Annobon Island are listed with their recent determination and current names. Leucophanes unguiculatum, Philonotis uncinata var. glaucescens and Vesicularia strephomischos are new records for the Equatorial Guinean bryoflora. Se citan con su identificación correcta y sus nombres actuales ocho especies de musgos procedentes de la isla de Annobón y registrados en la bibliografía como nomina nuda. Leucophanes ungui...

  13. 特殊な環境に生育する蘚苔類 1.葉上蘚苔類

    OpenAIRE

    中西, こずえ

    1996-01-01

    1. This report deals with the flora of epiphyllous bryophytes and their distribution in Nagasaki Prefecture. The epiphyllous bryophytes recognized by acutual specimens and literature comprise 4 genera, 11 species in the Hepaticae and 1 genus and 1 species in the Musci. 2. The phorophytes on which those bryophytes were observed are 10 species as tree and shurubs and 4 as herbs. 3. The number of species of epiphyllous bryophytes selected prefectures was shown. The bryophytes were more abundant ...

  14. Rhynchostegium megapolitanum (Web. et Mohr) B.S.G.-A rare bryophyte in dune ecosystems of Zealand, Denmark

    DEFF Research Database (Denmark)

    Johnsen, Ib

    2014-01-01

    Rhynchostegium megapolitanum was observed during a study of the effects of the invasive non-native Rosa rugosa in a sand dune. The vascular as well as the epiphytic and epigeic cryptogam vegetation was recorded., and soil properties were measured. Epihytic lichens were abundant on dead or dying b...

  15. THE HABITATS AND THE LIMESTONE BRYOPHYTES IN GUIYANG%贵阳地区石灰岩苔藓的种类及生境

    Institute of Scientific and Technical Information of China (English)

    彭晓馨; 骆强

    2003-01-01

    岩溶地区的植物多具落叶、矮生、多刺等特征,并存在较多的喜钙植物.许多植物均具有岩生适应性.作为石灰岩山的地被植物--苔藓,其生长与分布情况除受到灰岩性质及土壤影响外,无不与其上生长的乔灌木种类、数量等因素有关.

  16. Factors Affecting the Presence and the Diversity of Bryophytes in the Petrifying Sources Habitat (7220 in Wallonia and the Brussels-Capital Region, Belgium

    Directory of Open Access Journals (Sweden)

    J.-M. Couvreur

    2016-01-01

    Full Text Available Bryological composition, water chemistry, and environmental factors were characterized on 67 Belgian travertines. We explore the relationship between these environmental factors and the community composition, species richness, or presence of individual species using Redundancy Analysis with Hellinger’s transformation (tb-RDA or Generalized Linear Models (GLMs. The best variables explaining the community composition are slope, NO3, NH4, and PO4. The species richness is negatively related to canopy cover and PO4. Palustriella commutata tends to be more frequent when the slope is steeper and to a lesser degree when the canopy cover is lower. Eucladium verticillatum tends to be slightly more frequent when canopy cover and NH4 concentrations are lower. Cratoneuron filicinum is more frequent at higher Mg concentrations and Pellia endiviifolia is more frequent at lower PO4 concentrations and higher NO3 concentrations. Brachythecium rivulare showed wide ecological amplitude and almost none of the tested environmental factors seem to be related to its presence. The study identifies eutrophication as the main factor responsible for habitat deterioration. Practical indications on the best ways to maintain or to enhance the quality of these petrifying sources are given.

  17. A Preliminary Study on Bryophyte of Baotianman Nuture Reserve%宝天曼自然保护区藓类植物初步研究

    Institute of Scientific and Technical Information of China (English)

    李孝伟; 叶永忠; 孟丽; 袁志良

    2005-01-01

    首次报道宝天曼自然保护区藓类植物25科、75属、238种.分别占河南省总科、属、种数的62.5%、44.3%和43.5%,其中河南新记录科5个,新记录属23个,新记录种98个;该地区主要藓类群落分属于石生、土生、树生和腐木生四个群落类型.

  18. Restoration of a Rich Fen by Top Soil Removal : Temporal and Spatial Responses among Vascular Plants, Bryophytes and Land Snails during 15 years

    OpenAIRE

    Evasdotter, Liselott

    2011-01-01

    Rich fens are calcareous and nutrient poor wetlands with a rich flora of orchids, sedges and mosses. As many as one hundred plant species are rich fen specialists. Many wetlands have been drained historically, and transformed to agricultural land or production forests. Today rich fens cover only 2-3% of the total mire area in Sweden. Rich fen is a rare and valuable habitat also from a European perspective and is protected in the Natura 2000-network. To increase and maintain the biodiversity a...

  19. Dynamic aspects of spermiogenic chromatin condensation patterning by phase separation during the histone-to-protamine transition in charalean algae and relation to bryophytes.

    Science.gov (United States)

    Kasinsky, H E; Ellis, S; Martens, G; Ausió, J

    2014-12-01

    During early-to-middle spermiogenesis in multicellular, internally fertilizing charalean green algae (Chara fibrosa, Chara vulgaris, Chara tomentosa, Nitella missouriensis), patterning of chromatin/nucleoplasm in developing spermatid nuclei changes from granules → fibers → contorted lamellae → condensed chromatin. Cytochemical, immunocytochemical, electrophoretic studies on C. vulgaris and C. tomentosa spermatids (Kwiatkowska, Poplonska) and amino acid analysis of protamines in Chara corallina sperm (Reynolds, Wolfe), indicate that more positively charged protamines replace histones directly during spermiogenesis, not indirectly through other intermediate transitional proteins as in internally fertilizing neogastropods and sharks with more ordered spermatid lamellae. We hypothesize that such lamellar-mediated patterning is due to liquid-liquid phase separation by spinodal decomposition. This is a spontaneous thermodynamic process that involves diffusive instability of a lamellar chromatin network, a dominant pattern repeat distance and bicontinuity of chromatin/nucleoplasm phases. C. vulgaris sperm show contorted lamellae in the posterior region, whereas C. corallina sperm display contorted peripheral lamellae and interior fibrils. Among internally fertilizing liverworts, which may have evolved from Zygnematales, mid-spermatid nuclei lack lamellae. Instead they display self-coiled chromatin rods in Blasia pusilla, contain short chromatin tubules in Haplomitrium hookeri resembling those in internally fertilizing mosses and a hornwort and indirectly replace histones with protamines in Marchantia polymorpha.

  20. Solid Phase Extraction of Bryophyte Lipids / Briofītu lipīdu cietfāzes ekstrakcijas frakcionēšana

    Directory of Open Access Journals (Sweden)

    Klavina Laura

    2015-11-01

    Full Text Available Pētījuma ietvaros izstrādāta vienkārša, ātra un viegli atkārtojama analītiska metode briofītu lipīdu frakcionēšanai. Lipīdu frakcijas frakcionēšanai izmantoja cietfāzes ekstrakciju ar silikagēlu un ar NH2 grupām modificētu silikagēlu, iegūtās vielu grupas kvantificēja kā to trimetilsilil atvasinājumus, izmantojot gāzes hromatogrāfiju-masas spektrometriju. Frakcionēšanu veica, izmantojot eluentu polaritātes gradienta principu (eluenti: heksāns, heksāns/hloroforms 5:1, hloroforms, kā pēdējo eluentu ar NH2 grupām modificēta silikagēla gadījumā izmantojot skābes (etiķskābes šķīdumu. Izpētes objekti bija divi Latvijā plaši izplatīti sūnaugi (Polytrichum commune, Dicranum polysetum, kuru sastāvā identificēja vairāk nekā 45 dažādus savienojumus, daudzi no kuriem ir ar augstu bioloģisko aktivitāti. Sūnaugu sastāvā identificēja sterolus, tokoferolus, taukskābes un citi savienojumus. Izmantotā frakcionēšanas shēma pavēra iespējas identificēt daudzus savienojumus, kuri kopējā ekstrakta hromatogrammā nebija uzrādīti, piemēram, alkānu rindas savienojumi, vairāki steroli. Līdz ar to sūnaugu lipīdu cietfāzes frakcionēšanas metode ļāva noteikt vielu klātbūtni, kuras atrodas mikrodaudzumos, bet kuras varēja ļaut izsekot brīofītu pārvērtībām bioģeoķīmiskos procesos. Ieteiktā frakcionēšanas metode ļāva arī identificēt vairākas vielu grupas, kuras varētu būt perspektīvas kā jaunas bioloģiski aktīvas vielas, kā arī palīdzēja labāk izprast briofītu metabolismu, piemēram starpsugu atšķirības un sastāva sezonālās mainības raksturu.

  1. 贵州云雾山苔藓植物研究%Investigation in the Bryophytes from Mountain Yunwu of Guizhou Province

    Institute of Scientific and Technical Information of China (English)

    钟世梅; 熊源新; 刘良淑; 崔再宁; 曹威; 黎小冰; 周书琴; 夏欣

    2015-01-01

    通过对采自贵州云雾山的476份苔藓植物标本进行整理和鉴定,结果表明:该地区有苔藓植物53科103属230种(包括变种、亚种),其中,优势科有青藓科Brachytheciaceae、真藓科Bryaceae、曲尾藓科Dicranaceae等;优势属有真藓属Bryum、青藓属Brachythecium、凤尾藓属Fis-sidens等.此次调查还得到3个贵州省的新纪录种,分别是毛尖紫萼藓Grimmia pilifera P.Beauv,钝叶平蒴藓Plagiobryum Giraldii(C.Muell) Paris和小泽藓Philonotis calomicra Broth.in Schum.&Lauterb..

  2. Comparison of the chloroplast peroxidase system in the chlorophyte Chlamydomonas reinhardtii, the bryophyte Physcomitrella patens, the lycophyte Selaginella moellendorffii and the seed plant Arabidopsis thaliana

    Directory of Open Access Journals (Sweden)

    Baier Margarete

    2010-06-01

    Full Text Available Abstract Background Oxygenic photosynthesis is accompanied by the formation of reactive oxygen species (ROS, which damage proteins, lipids, DNA and finally limit plant yield. The enzymes of the chloroplast antioxidant system are exclusively nuclear encoded. During evolution, plastid and mitochondrial genes were post-endosymbiotically transferred to the nucleus, adapted for eukaryotic gene expression and post-translational protein targeting and supplemented with genes of eukaryotic origin. Results Here, the genomes of the green alga Chlamydomonas reinhardtii, the moss Physcomitrella patens, the lycophyte Selaginella moellendorffii and the seed plant Arabidopsis thaliana were screened for ORFs encoding chloroplast peroxidases. The identified genes were compared for their amino acid sequence similarities and gene structures. Stromal and thylakoid-bound ascorbate peroxidases (APx share common splice sites demonstrating that they evolved from a common ancestral gene. In contrast to most cormophytes, our results predict that chloroplast APx activity is restricted to the stroma in Chlamydomonas and to thylakoids in Physcomitrella. The moss gene is of retrotransposonal origin. The exon-intron-structures of 2CP genes differ between chlorophytes and streptophytes indicating an independent evolution. According to amino acid sequence characteristics only the A-isoform of Chlamydomonas 2CP may be functionally equivalent to streptophyte 2CP, while the weakly expressed B- and C-isoforms show chlorophyte specific surfaces and amino acid sequence characteristics. The amino acid sequences of chloroplast PrxII are widely conserved between the investigated species. In the analyzed streptophytes, the genes are unspliced, but accumulated four introns in Chlamydomonas. A conserved splice site indicates also a common origin of chlorobiont PrxQ. The similarity of splice sites also demonstrates that streptophyte glutathione peroxidases (GPx are of common origin. Besides a less related cysteine-type GPx, Chlamydomonas encodes two selenocysteine-type GPx. The latter were lost prior or during streptophyte evolution. Conclusion Throughout plant evolution, there was a strong selective pressure on maintaining the activity of all three investigated types of peroxidases in chloroplasts. APx evolved from a gene, which dates back to times before differentiation of chlorobionts into chlorophytes and streptophytes, while Prx and presumably also GPx gene patterns may have evolved independently in the streptophyte and chlorophyte branches.

  3. Sensitivity of Plant Communities and Soil Flora to Seawater Spills, Prudhoe Bay, Alaska,

    Science.gov (United States)

    1983-09-01

    tundra habitats . In the ent effects on the vegetation. A considerably wet and mesic study sites, bryophytes form a near- larger spill might not be as...confined, as in the basin of a small and help provide a habitat for new plant growth. .- : pond. The bryophyte response was hard to interpret ini- " tially...Abstract (contd.). - Live (green) bryophyte cover was markedly reduced in the moist experimental sites in 1981. Bryophytes in all but one of the wet-site

  4. Mosses new to New Mexico

    Science.gov (United States)

    A bryophyte inventory was conducted in the Valles Caldera National Preserve (VCNP), New Mexico, from 2009 to 2011. Specimens representing 113 species of bryophytes were collected. Of those bryophytes, seven of the mosses were new to New Mexico: Atrichum tenellum (Rohling) Bruch & Schimper, Dicranum ...

  5. A Literature Survey on the Wetland Vegetation of Alaska.

    Science.gov (United States)

    1982-08-01

    which may succeed to various forest or bog types. g 4 : 48 i - -" - - - Worley, 1972 No bryophytes grow in habitats submerged by tidal waters. However... bryophyte species grow on rocks near salt water but beyond the influence of waves and tides (p. 12). [Other bryophyte species known from similar habitats ...published information on wqtlands qg~a- tion of Alaska prior to September, 1977. The literature review and suntre are organized under the broad habitat

  6. 日光金精峠亜高山針葉樹林林床におけるコケ植物の分布と土壌水分の関係

    OpenAIRE

    竹﨑,大悟; 安田,正次; 百原, 新; 梅木, 清; 沖津, 進

    2012-01-01

    In order to clarify relation between bryophytes distribution and soil water condition in a subalpine coniferousforest fl oor, occurrences of bryophytes and soil water conditions of their habitats were compared. The maximumsoil water contents among the plots surveyed was 84% and the minimum soil water contents was 12% in the studyarea within only short distance of 20m. Habitat of Sphagnum girgensohnii showed highest soil water content. Thehabitats with no bryophytes occurrences showed intermed...

  7. Sphagnum as an Indicator of Wetland Hydrology in the Atlantic and Gulf Coastal Plain Region

    Science.gov (United States)

    2010-07-01

    et al. 1983). Some Sphagnum species occupy niches on or near the wetland boundary with greater frequency than other bryophytes (Lichvar et al. 2009...ERDC/CRREL TN-10-2 3 3 Desiccation Tolerance and Avoidance Strategies Bryophytes obtain moisture from a variety of sources, including...USACE 2008). Second, bryophytes are physiologically active only when hydrated. During dry periods, they become dormant, resuming normal

  8. Analysis of Dominant Species of Bryophytes at Three Habitats in Foping Nature Reserve%佛坪自然保护区三种生境苔藓植物优势种分析

    Institute of Scientific and Technical Information of China (English)

    李静平; 郭荣

    2011-01-01

    对佛坪自然保护区三种生境苔藓植物优势种进行了研究.结果表明,地面生苔藓植物分布最广的是大羽藓(Thuidium cymbifolium),苔类分布最广的为小蛇苔(Conocephalum japonicum);树生藓类分布最广的是陕西白齿藓(Leucodon exaltatus),苔类分布最广的为园叶羽苔(Plagiochila duthiana);腐生木上苔类分布最多的为指叶苔(Lepidozia reptans),藓类分布最广的为陕西白齿藓(Leucodon exaltatus).

  9. Interspecific relationships of bryophytes and vascular plants in two habitats of Hani Peatland in Changbai Mountain%长白山哈泥泥炭地两种生境苔藓与维管植物种间联结

    Institute of Scientific and Technical Information of China (English)

    陈旭; 卜兆君; 王升忠; 李鸿凯; 赵红艳

    2009-01-01

    采用2×2列联表,通过方差分析、χ2检验、Spearman秩相关和Jaccard指数对哈泥泥炭地20种优势苔藓和维管植物种间联结进行定量分析.研究结果表明,1)在开阔地,中位泥炭藓、锈色泥炭藓和桧叶金发藓3种苔藓与小叶杜鹃、鹿药、狭叶杜香的种间联结具有一致性,林缘中尖叶泥炭藓和喙叶泥炭藓与维管植物主要呈负关联;2)林缘生境物种总体呈显著正关联,开阔地中呈不显著正关联;3)2种生境下种间关联对比发现,郁闭度是影响泥炭地植被分布的重要环境因子,在同种生境下重要值大的物种之间通常出现正联系,在2种生境重要值差异大的物种之间一般表现为负联系.

  10. 紫木凼金矿不同生境苔藓植物的物种多样性和结构特征%Species diversity and structures of bryophytes from different habitats in Zimudang Gold Mine, southwestern Guizhou

    Institute of Scientific and Technical Information of China (English)

    杨再超; 张朝晖

    2010-01-01

    对紫木凼金矿不同生境下的苔藓植物多样性和丰富度进行生态调查.共发现苔藓植物10科14属37种.苔藓植物物种丰富度、a多样性的变化不仅与生境有关,而且还与生境中的污染因子有关,β多样性的变化与群落结构关系密切,它反映了苔藓植物生境的异质性.

  11. 重庆主城区住宅小区苔藓组成与多样性%Bryophyte composition and diversity within anthropogenic habitats in a residential area of Chongqing municipality city

    Institute of Scientific and Technical Information of China (English)

    皮春燕; 刘艳

    2014-01-01

    目前对于人造生活环境中的苔藓植物组成与多样性所知甚少.本文报道了城市住宅小区中的苔藓植物多样性,以丰富重庆市苔藓植物区系资料,为小区环境质量评估提供依据,为认识苔藓植物对新环境的适应能力提供科学基础.通过对重庆主城九区23个住宅小区进行详细调查,报道苔藓植物19科33属84种.种类组成以土生的丛藓科和真藓科为主.常见种类包括小凤尾藓(Fissidens bryoides)、大叶石灰藓(Hydrogonium majusculum)、细叶小羽藓(Haplocladium microphyllum)、鳞叶藓(Taxiphyllum taxirameum)和绿片苔(Aneura pinguis)共5种.各住宅小区苔藓物种数介于5-25种之间.物种相似性程度非常低,群落间差异较为显著,多样性较高.苔藓生活型以丛集型为主.典范对应分析排序结果显示,住宅小区居住户数对其苔藓物种多样性影响最大,其次是绿地面积.研究结果表明,住宅小区是城市苔藓植物的重要分布区域之一.地理环境差异、城市化水平、小区内部小生境条件和人为干扰程度可能是造成各住宅小区苔藓组成差异的原因.

  12. Adições à flora de briófitas de Mato Grosso do Sul, Brasil Additions to the flora of bryophytes from Mato Grosso do Sul State, Brazil

    Directory of Open Access Journals (Sweden)

    Olga Yano

    2004-09-01

    Full Text Available Nesse levantamento foram encontrados 133 táxons no Estado de Mato Grosso do Sul, sendo um pertencente à divisão Anthocerotophyta em um gênero e uma família, 83 pertencentes à divisão Bryophyta, distribuídos em 54 gêneros e 27 famílias, e 49 à divisão Hepatophyta, distribuídos em 27 gêneros e 13 famílias. Destes, 100 (1 antócero, 59 musgos e 40 hepáticas são novas citações para o Estado.In this taxonomic survey 133 taxa were found in Mato Grosso do Sul State, one belonging to Anthocerotophyta, distributed into one genus and one family, 83 belonging to Bryophyta, distributed into 54 genera and 27 families, and 49 belonging to Hepatophyta, distributed into 27 genera and 13 families. Of these, 100 (one hornworts, 59 mosses and 40 hepatics are new records for the State.

  13. Isolation, identification and antimicrobial activity screening of endophytic bacteria Bacillus megaterium z12 strain from bryophytes%苔藓内生菌Bacillus megaterium z12的分离、鉴定和抗菌活性筛选

    Institute of Scientific and Technical Information of China (English)

    张鑫; 王婷; 崔灵芝; 刘新利

    2012-01-01

    Objective An endophytic bacteria zl2 was isolated from the leaf of Plagiochasma intermedium which has broad-spectrum antimicrobial activity. Methods According to the mophology, physiological and biochemical characteristics, combined with phylogenetic analysis, and the antimicrobial activity of zl2 was analyzed with 14 tested strains. Results The bacteria was identified as Bacillus megaterium. The results of inhibition experiments showed that zl2 strain had broad-spectrum antimicrobial activity to 7 target strains in different degrees, especially for Staphylococcus aureus and Candida albicans, Corticium sasakii were investigated by further tests with crude extracts of zl2 strain fermentation. Conclusion The strain is deserved to develop an agricultural antibiotics.%目的 从无纹紫背苔(Plagiochasma intermedium)叶片中分离筛选出一株具广谱抗菌活性的内生菌z12.方法 根据菌落和细胞形态、生理生化特性,以及16S rDNA序列对内生细菌z12进行了分析鉴定,并研究了它对14种供试菌株的抑制作用.结果 经分析鉴定该菌属于巨大芽孢杆菌(Bacillus megaterium).抑菌实验表明,内生细菌z12对7种供试菌都有不同程度的抑制作用,对金黄色葡萄球菌(Staphylococcus aureus)和白念珠菌(Candida albicans)的抑制作用较强.研究了z12菌株粗提物对水稻纹枯病原菌(Corticium sasakii)的抑制作用.结论 该菌株具有开发成农用抗生素的价值.

  14. 新疆博格达山地面生苔藓植物物种多样性研究%Species diversity of floor bryophyte communities in Bogda Mountains, Xinjiang

    Institute of Scientific and Technical Information of China (English)

    张元明; 曹同; 潘伯荣

    2003-01-01

    采用相似性系数和物种多样性指数对新疆博格达山地面生苔藓植物的物种多样性进行了研究.结果表明,博格达山地区苔藓植物区系具有丰富性和复杂性的特点,共有地面生苔藓植物32科73属186种(含变种、变型);山地荒漠带和山地草原带苔藓植物物种相似性最高,为0.6809,山地森林带和高山垫状植被带相似性最低,仅为0.1342;山地森林带苔藓植物在整个博格达山地面生苔藓植物群落中占据优势地位;山地森林带苔藓植物物种多样性最为丰富,为该山地苔藓植物多样性的分布中心,是苔藓植物多样性保护的关键地区.

  15. SPECIES DIVERSITY OF FLOOR BRYOPHYTE COMMUNITIES IN FOPING NATURE RESERVE%佛坪国家自然保护区地面生苔藓植物物种多样性

    Institute of Scientific and Technical Information of China (English)

    李粉霞; 王幼芳; 詹琪芳; 徐波; 翟德逞; 党高弟

    2006-01-01

    通过对秦岭南坡佛坪国家自然保护区地面生苔藓植物的调查,采用相似性系数、重要值、多样性指数对其进行物种多样性的研究.结果表明:29个样地内地面生苔藓植物共33科69属189种,包括苔类植物7科8属15种和藓类植物26科61属174种,其中青藓科是最优势的科.落叶阔叶栎(Quercus)林下地面生苔藓植物的物种多样性最高,其次是落叶阔叶桦(Betula)林带、竹林、针叶林和沟谷岩石,杜鹃(Rhododendron)灌丛带的最低.落叶阔叶栎林带和落叶阔叶桦林带的种相似性最高,杜鹃灌丛与其它植被带的种相似性都很低.研究表明秦岭南坡的佛坪国家自然保护区内,低山地区的落叶阔叶栎林带是该地区苔藓植物多样性的分布中心,是物种多样性保护的关键地带;亚高山地区杜鹃灌丛带的苔藓植物物种多样性虽然不高,但种类明显不同于别的地带,所以也应是苔藓植物多样性保护值得注意的地带.

  16. Distribution patterns of floor bryophytes in Shenyang and the influence of environmental factors%沈阳市地面苔藓植物的分布及对环境因子的响应

    Institute of Scientific and Technical Information of China (English)

    陈龙; 吴玉环; 李微; 高谦

    2009-01-01

    应用双向指示种分析法(TWINSPAN)和除趋势对应分析法(DCA),对沈阳市57种苔藓植物分布格局进行了分析.结果将20个样点划分为三个组,其中组l样点所含种类不足10种;组2在10~20种之间;而组3多在20种以上.从组1到组3,物种丰富度逐渐增加;分类与排序的结果与样点的实际物种分布特点基本一致.采用典范对应分析(CCA)对其中20个样点的35种主要地面苔藓植物与环境因子间的关系进行了分析.发现土壤含水量、人为干扰度和乔木层郁闭度是影响沈阳市苔藓植物分布的主要因素.同时根据环境凶子的影响,将沈阳市主要地面苔藓植物分为两类,其中第一类多为顶蒴藓类:而第二类则主要为侧蒴藓类.

  17. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region

    Science.gov (United States)

    2008-04-01

    habitats . However, these areas often support a well-developed and diverse ground cover of bryophytes . Lichvar et al. (2007) developed a list of common...21 Table 4. Bryophyte species that are highly associated with wetlands in western hemlock...wetlands have formed. Nonetheless, wetlands and other shallow aquatic habitats occupy only a few percent of the land sur- face (Dahl 1990). Regional

  18. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Alaska Region

    Science.gov (United States)

    2006-02-01

    National Wetlands Inventory, wetlands (including shallow subtidal habitats in coastal areas) occupy more than 174 million acres (70 million ha) and...Sampling wetland cryptogams Background. Cryptogams, defined here as bryophytes (mosses, liverworts, hornworts), lichens, and fungi, form extensive...abundant, constitute a nearly “test positive” indicator of hydrophytic vegetation. Wetland-specialist bryophytes were defined as those having ≥67

  19. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Alaska Region (Version 2.0)

    Science.gov (United States)

    2007-09-01

    hydrology indicators for Alaska. ......................................................................53 Table 7. Bryophytes that are highly...shallow subtidal habitats in coastal areas) occupy more than 174 million acres (70 million ha) and comprise more than 43 percent of the State’s...2007) identified several species of wetland-specialist bryophytes that can help identify hydrophytic vegetation on sites where the vascular flora is

  20. Biologie vzácných druhů mechorostů

    OpenAIRE

    PAPÁČKOVÁ, Dagmar

    2009-01-01

    Most of studies found that rare species have narrow habitat requirements, restricted dispersal and poor competition capabilities. I review these patterns of some rare bryophytes species as a causes of their rarity and I assess human activity leading to decrease population of some rare bryophytes. Finally I describe some restoration managements to save these populations of some rare species.

  1. The decision to germinate is regulated by divergent molecular networks in spores and seeds

    DEFF Research Database (Denmark)

    Vesty, Eleanor F.; Saidi, Younousse; Moody, Laura A.;

    2016-01-01

    in the model bryophyte Physcomitrella patens (Aphanoregma patens). Our data suggest that the environmental signals regulating germination are conserved, but also that downstream hormone integration pathways mediating these responses in seeds were acquired after the evolution of the bryophyte lineage. Moreover...

  2. Nonvascular contribution to ecosystem NPP in a subarctic heath during early and late growing season

    DEFF Research Database (Denmark)

    Campioli, Matteo; Samson, Roeland; Michelsen, Anders

    2009-01-01

    Bryophytes and lichens abound in many arctic ecosystems and can contribute substantially to the ecosystem net primary production (NPP). Because of their growth seasonality and their potential for growth out of the growing season peak, bryophyte and lichen contribution to NPP may be particularly...

  3. Seedling establishment at the alpine tree line - Can there be too much winter protection?

    Science.gov (United States)

    Lett, S.; Wardle, D.; Nilsson, M. C.; Dorrepaal, E.

    2014-12-01

    Alpine and arctic tree line expansion relies on tree seedling survival above the tree line, where the environment is harsh and protection by snow during winter is essential. Above the tree line, bryophytes are dominant; they may act as thermal insulators but their insulating ability differs between species. Apart from these positive effects, both snow and bryophytes may have negative effects on seedlings via shortening of the growing season or competition, respectively. Snow depth and duration are expected to change due to climate change, leading in some places to more snow and in others to less. What is the role of bryophytes insulating properties for seedling establishment under changing winter conditions at the alpine tree line? We hypothesized that protecting effects of snow and bryophytes would be more important for seedling survival in harsh climate (high elevation) than in milder climate (low elevation) (interactions: bryophyte*elevation and snow*elevation) and that negative effects of less snow would be ameliorated by well-insulating bryophytes (interaction: bryophyte*snow). To test this, we transplanted cores of three bryophyte species of differing insulation capacity and bare soil (control) from the subarctic tree line (~600m asl.) to 700 and 350 m asl. We transplanted 10 seedlings of two common tree line tree species (Betula pubescens and Pinus sylvestris) into each core in late summer. Cores were subjected to one of three snow treatments: autumn and spring snow removal or addition, or no manipulation. After the winter we scored seedling survival. The snow treatments had different effects at the two elevations (elevation* snow: Pbryophytes did not (elevation*bryophyte: n.s). In the harsh climate, snow addition generally enhanced seedling survival. In contrast, at the milder climate site, snow addition only increased survival in the bare soil treatment but decreased survival of seedlings in the bryophyte cores (bryophyte*snow: P=0.053). Our data show that

  4. Patterns of metal soil contamination and changes in terrestrial cryptogamic communities

    Energy Technology Data Exchange (ETDEWEB)

    Cuny, Damien; Denayer, Franck-Olivier; Foucault, Bruno de; Schumacker, Rene; Colein, Philippe; Haluwyn, Chantal van

    2004-05-01

    Correlations between terricolous bryophyte- and lichen- vegetation and edaphic parameters (pH, organic matter, nitrogen, Carbon/nitrogen ratio, Cation Exchange Capacity, and Cd, Pb and Zn soil contents) of soils submitted to a gradient of metal contamination in northern France were performed using statistical analysis. Six classes can be distinguished according to the low-, intermediate- and high-trace metal levels respectively, leading to the conclusion that bryophyte- and lichen-groupings have a strong bioindicative value of the heavy metal pollution of soils. - Bryophyte- and lichen-assemblages provide a bioindicative value of heavy metal polluted soils.

  5. Bibliography

    NARCIS (Netherlands)

    NN,

    1974-01-01

    The entries have been split into five categories: a) Algae — b) Fungi & Lichenes — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  6. Bibliography

    NARCIS (Netherlands)

    NN,

    1976-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  7. Bibliography

    NARCIS (Netherlands)

    NN,

    1971-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & lichenes – c) Bryophytes – d) Pteridophytes – e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  8. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1986-01-01

    The entries have been split into five categories: (a) Algae — (b) Fungi & Lichens — (c) Bryophytes — (d) Pteridophytes — (e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  9. Bibliography

    NARCIS (Netherlands)

    Harris, T.U.

    1966-01-01

    For the first time the growing amount of entries has been split into five categories: a) Algae, b) Fungi & Lichenes, c) Bryophytes, d) Pteridophytes, e) Spermatophytes & General subjects. Books have been marked by an asterisk.

  10. Bibliography

    NARCIS (Netherlands)

    NN,

    1972-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & Lichenes – c) Bryophytes – d) Pteridophytes – e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  11. Bibliography

    NARCIS (Netherlands)

    NN,

    1975-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & Lichenes – c) Bryophytes – d) Pteridophytes – e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  12. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1983-01-01

    The entries have been split into five categories: a) Algae — b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes 8 General subjects. — Books have been marked with an asterisk.

  13. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1985-01-01

    The entries have been split into five categories: (a) Algae — (b) Fungi & Lichens — (c) Bryophytes — (d) Pteridophytes — (e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  14. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1984-01-01

    The entries have been split into five categories: (a) Algae — (b) Fungi & Lichens — (c) Bryophytes — (d) Pteridophytes — (e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  15. Bibliography

    NARCIS (Netherlands)

    NN,

    1969-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & Lichenes – c) Bryophytes – d) Pteridophytes – e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  16. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1980-01-01

    The entries have been split into five categories: a) Algae — b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk: *.

  17. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1977-01-01

    The entries have been split into five categories: a) Algae — b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk: *.

  18. EcologicFauna_ATLAS

    Data.gov (United States)

    Vermont Center for Geographic Information — This database contains town-level totals of documented species records for several plant and animal taxa including vascular plants, trees, bryophytes, ferns, fish,...

  19. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1977-01-01

    The entries have been split into five categories: a) Algae – b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk.

  20. Bibliography

    NARCIS (Netherlands)

    Steenis, van C.G.G.J.

    1979-01-01

    The entries have been split into five categories: a) Algae — b) Fungi & Lichens — c) Bryophytes — d) Pteridophytes — e) Spermatophytes & General subjects. — Books have been marked with an asterisk: *.

  1. U.S. Tundra Biome-International Biological Program. U.S. Tundra Biome Publication List.

    Science.gov (United States)

    1983-09-01

    4040) /Bib 33-4561/ Rastorfer, J.R., H.J. Webster and D.K. Smith (1973) Floristic and ecologic studies of bryophytes of selected habitats at...al., Eds). Stockholm: IBP Tundra Biome Steering Committee, pp. 375-378. (1799) /Bib 29-3367/ Flock, J.W. (1978) Lichen- bryophyte distribution along a...1973) Natural oil seeps at Cape Simpson, Alaska: Localized influences on terrestrial habitat . Proceedings of the Symposium on the Impact of Soil

  2. Trace-element accumulation by Hygrohypnum ochraceum in the upper Rio Grande Basin, Colorado and New Mexico, USA

    Energy Technology Data Exchange (ETDEWEB)

    Carter, L.F. [Geological Survey, Albuquerque, NM (United States); Porter, S.D. [Geological Survey, Lakewood, CO (United States). Denver Federal Center

    1997-12-01

    Accumulation of 12 trace elements by transplanted aquatic bryophytes (Hygrohypnum ochraceum) was determined at 13 sites in the Rio Grande and tributary streams in southern Colorado and northern New Mexico as part of the US Geological Survey`s National Water-Quality Assessment Program. The purposes of the study were to determine the spatial distribution of trace elements in relation to land-use practices in the upper Rio Grande Basin, compare accumulation rates of metals in bryophytes at sites contaminated by trace elements, and evaluate transplanted aquatic bryophytes as a tool for examining the bioavailability of trace elements in relation to concentrations in water and bed sediment. Concentrations of Cd, Cu, Pb, and Zn in bryophytes, water, and bed sediment were significantly higher at sites that receive drainage from mining areas than at sites near agricultural or urban activities. Concentrations of most trace elements were lower in a tributary stream below an urban source than at sites near mining or agricultural use. Concentrations of Cu and Zn in bryophytes correlated with concentrations in water and bed sediment. In addition, bryophyte concentrations of As, Cd, and Pb correlated with concentrations in bed sediment. Transplanted bryophytes can provide an indication of bioavailability. Rates of accumulation were related to the magnitude of ambient trace-element concentrations; maximal uptake occurred during the first 10 d of exposure. Trace-element concentrations in transplanted bryophytes could potentially be used to predict water and sediment concentrations that represent an integration of conditions over short to intermediate lengths of time, rather than instantaneous conditions as measured using water samples.

  3. Wissenschaftliche Ergebnisse der BRYOTROP-Expedition nach Zaire und Rwanda : 6., Lebensformen und Adaptionen zur Wasserleitung und Wasserspeicherung in epiphytischen Moosgesellschaften im östlichen Kongobecken und den angrenzenden Gebirgsstöcken (Parc National de Kahuzi-Biega/Zaire, Forêt de Nyungwe/ Rwanda)

    OpenAIRE

    KÜRSCHNER, Harald; Seifert, Ulrike H.

    1995-01-01

    Life forms, water conducting and water storing structures of epiphytic bryophytes are studied along an altitudinal gradient from the eastern Congo basin (tropical lowand zone) to the mountains of the East-African graben (tropical subalpine/alpine zone; BRYOTROP III-transect). Based on a phytosociological analysis, these adaptations were put in relation to the distribution pattern of the bryophyte communities, as well as to the ecological gradient. The interpretation is based on the mean perce...

  4. Crown Group Lejeuneaceae and Pleurocarpous Mosses in Early Eocene (Ypresian) Indian Amber

    OpenAIRE

    2016-01-01

    Cambay amber originates from the warmest period of the Eocene, which is also well known for the appearance of early angiosperm-dominated megathermal forests. The humid climate of these forests may have triggered the evolution of epiphytic lineages of bryophytes; however, early Eocene fossils of bryophytes are rare. Here, we present evidence for lejeuneoid liverworts and pleurocarpous mosses in Cambay amber. The preserved morphology of the moss fossil is inconclusive for a detailed taxonomic t...

  5. Aproximación al conocimiento de las briofitas de Venezuela

    OpenAIRE

    Moreno, Efraín J.

    1992-01-01

    This paper introduces the up-dated taxonomic placement of 106 genera of Hepaticae and 233 genera of Musci known from Venezuela. Besides, a summarized version from the geographical distribution in Venezuela of 383 species of Hepaticae and 1009 species of mosses is presented. Information was derived from an exhaustive revision of bryophyte collections in the Venezuelan herbaria, and from publications about bryophytes collected in Venezuela. It is concluded that Venezuela, despite having been li...

  6. Lichen secondary metabolites affect growth of Physcomitrella patens by allelopathy.

    Science.gov (United States)

    Goga, Michal; Antreich, Sebastian J; Bačkor, Martin; Weckwerth, Wolfram; Lang, Ingeborg

    2016-09-19

    Lichen secondary metabolites can function as allelochemicals and affect the development and growth of neighboring bryophytes, fungi, vascular plants, microorganisms, and even other lichens. Lichen overgrowth on bryophytes is frequently observed in nature even though mosses grow faster than lichens, but there is still little information on the interactions between lichens and bryophytes.In the present study, we used extracts from six lichen thalli containing secondary metabolites like usnic acid, protocetraric acid, atranorin, lecanoric acid, nortistic acid, and thamnolic acid. To observe the influence of these metabolites on bryophytes, the moss Physcomitrella patens was cultivated for 5 weeks under laboratory conditions and treated with lichen extracts. Toxicity of natural mixtures of secondary metabolites was tested at three selected doses (0.001, 0.01, and 0.1 %). When the mixture contained substantial amounts of usnic acid, we observed growth inhibition of protonemata and reduced development of gametophores. Significant differences in cell lengths and widths were also noticed. Furthermore, usnic acid had a strong effect on cell division in protonemata suggesting a strong impact on the early stages of bryophyte development by allelochemicals contained in the lichen secondary metabolites.Biological activities of lichen secondary metabolites were confirmed in several studies such as antiviral, antibacterial, antitumor, antiherbivore, antioxidant, antipyretic, and analgetic action or photoprotection. This work aimed to expand the knowledge on allelopathic effects on bryophyte growth.

  7. A study on bryophyte associated with formation of soil crust in south fringe of Gurbantunggut Desert in Xinjiang%新疆古尔班通古特沙漠南缘土壤结皮中苔藓植物的研究

    Institute of Scientific and Technical Information of China (English)

    张元明; 曹同; 潘伯荣

    2002-01-01

    对新疆古尔班通古特沙漠南缘土壤结皮中苔藓进行了研究,结果表明,该地区参与土壤结皮的有4种苔藓植物,即真藓(Bryum argenteum)、细叶真藓(Bryum capillare)、无齿紫萼藓(Grimmia anodon)和垫状紫萼藓(Grimmia pulvinata),并分析了其耐旱特性和分布特征;研究发现该地区苔藓结皮呈层片分布规律,由表及里依次为苔藓植物层、无机沙砾层Ⅰ、藻结皮层、无机沙砾层Ⅱ等4层.

  8. 鄂尔多斯地区不同生境类型对苔藓植物多样性和丰富度的影响%Effect of Different Habitats on the Diversity and Richness of Bryophyte in Erdos Region

    Institute of Scientific and Technical Information of China (English)

    徐杰; 白学良; 哈斯巴根; 苏亚拉图

    2007-01-01

    对鄂尔多斯地区皇甫川人工治理区和阿贵庙自然保护区不同生境类型下的苔藓植物的多样性和丰富度进行研究.结果表明,维管植物的种类和分布影响苔藓植物的生长和分布模式,其创造的微生境为苔藓植物提供了避难所,但维管植物产生的地被物(枯枝、落叶)又抑制了苔藓植物在其下的分布.苔藓植物α多样性的变化不仅与生境的变化有关,还与构成生境的群落结构要素有关,这些结构要素包括群落的层片结构,维管植物的郁闭度、盖度、种类组成,地被物的盖度和分布格局,藻类的盖度和分布格局.苔藓植物β多样性的变化与群落结构的关系更为密切,相似群落结构间的β多样性相似系数明显高于结构存在差异的群落.

  9. Water Holding Capacities of Bryophytes under Different Habitats in Jin-yun-shan National Nature Reserve%缙云山国家级自然保护区不同生境下苔藓植物持水能力研究

    Institute of Scientific and Technical Information of China (English)

    刘艳; 乔光军

    2016-01-01

    苔藓植物作为森林生态系统的重要组成成分,具有很强的持水能力,发挥着重要的生态功能.然而,不同生境下苔藓植物的持水能力研究报道较少.选取重庆市缙云山国家级自然保护区石生、土生、树生3种不同生境下苔藓植物优势种共7种,采用室内浸泡法,定量评价它们的最大持水能力并揭示持水量随时间的变化规律.研究结果显示,7种苔藓植物能够吸收自身质量5.45~16.35倍的水分,最大持水量为8.92~27.18 t·hm-2;其中桧叶白发藓(Leucobryum juniperoideum)在3种不同生境下的最大持水率和最大持水量均比相同生境下的其他群落优势种高.石生生境下3种优势种的平均最大持水量高于土生和树生生境下的优势种平均最大持水量.持水量随着浸泡时间的增加而增加,在浸泡30 min内持水量增长最快,浸泡8h后接近饱和,符合y=k ln x+p的关系式.研究结果可为重庆市缙云山国家自然保护区苔藓植物多样性保护和苔藓植物水文功能研究提供了科学依据.

  10. Historical review of bryological research in Fruška Gora Mt. (Serbia

    Directory of Open Access Journals (Sweden)

    Ilić Miloš M.

    2016-01-01

    Full Text Available Fruška Gora is a mountain located in the southern part of Pannonian plane and it is poorly bryologicaly investigated as well as most parts of Serbia. First data on bryophytes, for this region, were published in 1949 by Teodor Soška in his paper Pregled mahovina i lišajeva u okolini Beograda (Review of mosses and lichens in the vicinity of Belgrade. Soška listed 34 species of mosses and 8 liverworts species for this region. Later, in 1955, Zlatko Pavletić in his capital work Prodromus flore briofita Jugoslavije (Prodromus of Yugoslavian bryophyte flora, stated 26 moss species and 3 liverwort species, without indicating specific localities, but all of them were Soška’s original results. In 1966, the second botanist with original findings of bryophytes on Fruška Gora was Popović, who recorded 2 liverwort and 19 moss species, for this mountain, also without specific localities. By far, the most comprehensive data were given by Cvetić and Sabovljević in 2004. Their study A contribution to the bryophyte flora of Fruška Gora (Vojvodina, Serbia counted total number of 118 mosses and 14 liverworts, on 16 localities within National park Fruška Gora. The latest study on bryophytes of Fruška Gora was in 2013, and it is the first and so far, the last study of bryophyte assemblages on grasslands. Authors of this paper recorded 18 species of mosses from 29 releveé. Complete bryophyte flora of Fruška Gora is still unknown. Considering the fact that this is the region with high biodiversity, dense hydrological network and a rather complex geology, Fruška Gora certainly deserves further bryological researches.

  11. The anagenetic world of spore-producing land plants.

    Science.gov (United States)

    Patiño, Jairo; Carine, Mark; Fernández-Palacios, José María; Otto, Rüdiger; Schaefer, Hanno; Vanderpoorten, Alain

    2014-01-01

    A fundamental challenge to our understanding of biodiversity is to explain why some groups of species diversify, whereas others do not. On islands, the gradual evolution of a new species from a founder event has been called 'anagenetic speciation'. This process does not lead to rapid and extensive speciation within lineages and has received little attention. Based on a survey of the endemic bryophyte, pteridophyte and spermatophyte floras of nine oceanic archipelagos, we show that anagenesis, as measured by the proportion of genera with single endemic species within a genus, is much higher in bryophytes (73%) and pteridophytes (65%) than in spermatophytes (55%). Anagenesis contributed 49% of bryophyte and 40% of endemic pteridophyte species, but only 17% of spermatophytes. The vast majority of endemic bryophytes and pteridophytes are restricted to subtropical evergreen laurel forests and failed to diversify in more open environments, in contrast with the pattern exhibited by spermatophytes. We propose that the dominance of anagenesis in island bryophytes and pteridophytes is a result of a mixture of intrinsic factors, notably their strong preference for (sub)tropical forest environments, and extrinsic factors, including the long-term macro-ecological stability of these habitats and the associated strong phylogenetic niche conservatism of their floras.

  12. 新疆苔藓植物的研究进展%Recent advances in Xinjiang Bryoligical Research

    Institute of Scientific and Technical Information of China (English)

    热比也木·吾甫; 艾尼瓦尔·阿布都热衣木; 玛尔孜亚·阿不力米提; 买买提明·苏来曼

    2014-01-01

    苔藓植物是植物界的一个重要门类,植株矮小,适应性广。新疆苔藓植物的研究主要集中在经典分类学、苔藓植物区系、形态解剖学、专科、专属等方面。而苔藓植物生态学及苔藓植物多样性方面的研究才刚刚起步。本文扼要介绍了20多年来苔藓植物各个分支学科的研究现状,探讨了苔藓植物研究今后的发展趋势。文中,还对我区苔藓植物研究工作今后的研究方向提出了作者的见解。%Bryophyte is an important category of plant kingdom, has small body and extensive adaptability. Because the research bryophyte in Xinjiang starts late, the current research field is mainly in classical taxon-omy, moss flora, and study of morphological anatomy, specialized subject, exclusive research. The research of bryophyte ecology and moss plant diversity is rare. The article expounds the research of bryophyte in Xinjiang development course and present situation, research direction and prospect of bryophyte in Xinjiang.

  13. Peat molecular fossils recording paleoclimatic change and organism replacement

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The occurrence of the dominant C23 n-alkane derived from bryophyte was demonstrated to be related to the cold climate, based on the GC and GC/MS analyses on a 40-cm long peat core, in which this compound exponentially varies in abundance with the depth corresponding to the well-known second Little Ice Age. Both the variation of the chemical components of modern bryophyte resulted from climatic change and the ecological data about the biological growth influenced by climate shed light on the point that the variation of this compound in the peat was related to the cold climate. This was also evidenced by the previously-reported lacustrine data. In addition, the variations of the ratios of ketones/esters and C24 n-alkene/n-alkane (C24: t/C24: 0) display the trend identical with that of organisms, implicating the replacement between bryophyte and monocotyledon occurring in the peatcore.

  14. The legacy of nitrogen pollution in heather moorlands: ecosystem response to simulated decline in nitrogen deposition over seven years.

    Science.gov (United States)

    Edmondson, J; Terribile, E; Carroll, J A; Price, E A C; Caporn, S J M

    2013-02-01

    Eutrophication and acidification of heather moorlands by chronic atmospheric nitrogen (N) pollution, is of major concern within these internationally important ecosystems. However, in the UK and Western Europe generally emissions of NO(y) and NH(x) peaked during the 20th century. Due to the history and scale of atmospheric N pollution, the legacy of these high levels of N deposition, through accumulation in soil, may hinder or prevent ecosystem recovery. Effects of N pollution on heather moorland were investigated throughout the ecosystem including; the dominant plant species, Calluna vulgaris, the bryophyte and lichen community and the soil system using a long-term experiment simulating wet N deposition. We observed an increase in C. vulgaris height, shoot extension and canopy density, litter mineral N, total N concentration, N:P and C:N ratios in response to N addition. Bryophyte species diversity, bryophyte and lichen frequency and the frequency of two individual bryophyte species (Lophozia ventricosa and Campylopus flexuosus) were significantly reduced by N addition. We developed an N recovery experiment, using a split-plot design, on the long-term N treatment plots to investigate ecosystem response to a simulated decline in N deposition. Two years after cessation of N treatment the only ecosystem component that responded to the recovery experiment was C. vulgaris shoot extension, however after seven years of recovery there were significant declines in litter total N concentration and mineral N and an increase in litter C:N ratio. Although bryophytes and lichens form a close relationship with atmospheric N deposition these organisms did not show a significant response to the N recovery experiment, two years after cessation of N treatment. These data indicate that low nutrient ecosystems, such as moorlands, have the capacity to respond to declines in N deposition however the accumulation of pollution may hinder recovery of sensitive organisms, such as bryophytes

  15. Mosses, liverworts and hornworts of Mount Canobolas, New South Wales

    OpenAIRE

    Downing, Alison; Oldfield, Ron; Fairbairn-Wilson, Eleanor

    2015-01-01

    A surprising number of endemic species of plants and animals are found within Mount Canobolas State Recreation Area (33°21’ S, 148°59’ E, 1395 m asl) 15 km SW of Orange in the Central West of New South Wales. During this survey of bryophytes on Mount Canobolas, 75 species, including 60 moss species, 13 liverwort species and two hornwort species were identified. Although no endemic bryophyte species were recorded, the assemblage included an unusual combination of alpine, arid zone and rainfore...

  16. Analysis by neutron activation in moss samples for the determination of Cr, Se, As and Hg; Analisis por activacion neutronica en muestras de musgos para la determinacion de Cr, Se, As y Hg

    Energy Technology Data Exchange (ETDEWEB)

    Mejia C, R.; Garcia R, G. [Instituto Tecnologico de Toluca, Departamento de Posgrado, Av. Tecnologico s/n, Fraccionamiento La Virgen, 52149 Metepec, Estado de Mexico (Mexico); Lopez R, C.; Avila P, P.; Longoria G, L. C., E-mail: rosario.mejia@inin.gob.mx [ININ, Departamento del Reactor, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico)

    2012-10-15

    This research work, presents a study of environmental monitoring in the Metropolitan Area of Toluca Valley using as bio-monitors to the mosses (bryophytes) native of different sites, analyzing the concentrations of As, Cr, Hg and Se, present in its structure. The analysis technique used to identify and to quantify to these elements was the Analysis by Neutron Activation, a nuclear analytic technique that allowed determining the concentrations at track level for its great versatility. Likewise the morphological study of the bryophyte Leskea angustata is presented by scanning electron microscopy. (Author)

  17. Patterns and drivers of phytodiversity in steppe grasslands of Central Podolia (Ukraine)

    DEFF Research Database (Denmark)

    Kuzemko, Anna; Steinbauer, Manuel; Becker, Thomas

    2016-01-01

    We asked: (i) Which environmental factors determine the level of α-diversity at several scales and β-diversity in steppic grasslands? (ii) How do the effects of environmental factors on α- and β-diversity vary between the different taxonomic groups (vascular plants, bryophytes, lichens)? We sampled...... intermediate compared to those known from similar grasslands throughout the Palaearctic, but for 1 cm2 we found seven species of vascular plants, a new world record. Heat index was the most important factor for vascular plants and bryophytes (negative relation), while lichen diversity depended mainly on stone...

  18. Restoring hydrology and old-growth structures in a former production forest

    DEFF Research Database (Denmark)

    Mazziotta, Adriano; Heilmann-Clausen, Jacob; Bruun, Hans Henrik

    2016-01-01

    to restore hydrology and old-growth structure. We collected presence/absence data for four organism groups (vascular plants, epiphytic bryophytes and lichens, wood-inhabiting fungi) and measured environmental variables associated with species occurrence and influenced by restoration (dead or living tree...

  19. Lophozia perssonii Buch & S. Arnell in Nederland

    NARCIS (Netherlands)

    Gradstein, S. Rob; Rubers, Wim V.; Sipman, Harrie J.

    1976-01-01

    The first record of Lophozia perssonii for the Netherlands, from an old and deep limestone-quarry near Cadier en Keer, S. Limburg. Sterile L. perssonii grows here as a pioneer on shaded, calcareous tufa blocks together with Leiocolea badensis and other bryophytes. The differences with related specie

  20. Disjunct Hepaticae in tropical America and Africa

    NARCIS (Netherlands)

    Gradstein, S.R.; Pócs, T.; Váňa, J.

    1983-01-01

    An increasingly large number of macrodisjunct species is emerging from recent literature dealing with taxonomy and floristics of tropical bryophytes. This paper reviews present knowledge concerning Afro-American disjunctions in Hepaticae and seeks to interprete the data in the light of current phyto

  1. Disturbance and Recovery of Arctic Alaskan Tundra Terrain. A Review of Recent Investigations.

    Science.gov (United States)

    1987-07-01

    always considerably along the coastal plain according to available, possibly in the seed bank. Bryophyte - local substrate and temperature regime, and...Anthropogenic disturbances ......................................... 14 Toward an ecological understanding of disturbance and recovery in arctic tundra...major topic the basic research on tundra ecology . Studies of of scientific research in northern Alaska for the the response of arctic tundra to human

  2. Impact of trampling on the vegetation of subantarctic Marion Island

    NARCIS (Netherlands)

    Gremmen, N.J.M.; Smith, V.; Van Tongeren, O.F.R.

    2003-01-01

    We assessed the impact of human trampling in three different habitats on Marion Island (46°50'S, 37°50'E). The habitats were (1) mires with wet, peaty soils and grass- and bryophyte-dominated vegetation; (2) slopes with relatively dry mineral soils, dominated by small ferns and dwarf shrub; and (3)

  3. The Wetlands Research Program Bulletin. Volume 4, Number 3, October 1994

    Science.gov (United States)

    1994-10-01

    MS.) 2 capacity of a wetland to provide habitat may change as which a functional capacity index is developed. The plant succession takes place...The relationship between variable condition and functional capacity in the reference Figure 2. Bryophytes on tupelo trees indicate average annual

  4. Oxygenation of the Root Zone and TCE Remediation: A Plant Model of Rhizosphere Dynamics

    Science.gov (United States)

    2008-03-01

    photosynthetic, and eukaryotic organisms. There are four main plant groups: bryophytes , seedless vascular plants, gymnosperms, and angiosperms. The 28...unique physiological characteristics has initiated deeper interest in the study and protection of these critical habitat areas. The relationship...and J. P. Amon. “Seasonal dynamics of arbuscular mycorrhizal fungi in differing wetland habitats ,” Mycorrhiza 14: 329-337 (2004). Beckett, P

  5. ‘Poor rich fen mosses’: atmospheric N-deposition and P-eutrophication in base-rich fens

    NARCIS (Netherlands)

    Kooijman, A.M.

    2012-01-01

    Base-rich fens in the Netherlands are threatened by acidification and replacement of rich-fen bryophytes by Sphagnum spp. Acidification is a natural process when input of base-rich water is reduced, and is probably accelerated by high atmospheric deposition, leading to lower pH at similar calcium le

  6. Announcements

    NARCIS (Netherlands)

    NN,

    1998-01-01

    Dr. B.C. Tan at the National University of Singapore (SINU) is looking for good and enthusiastic graduate students, especially from ASEAN countries, to study bryophyte systematics for either a MSc or a PhD degree. SINU has good laboratory and library facilities for both classical and modern systemat

  7. Distribution of Grimmia Hedw. on Mediterranean islands

    NARCIS (Netherlands)

    Greven, H.C.

    1995-01-01

    On the six largest Mediterranean islands: Corsica, Crete, Cyprus, Mallorca, Sardinia and Sicily, the moss genus Grimmia (Grimmiaceae, Musci) is represented by 29 species. Many of these are newly recorded. The importance of the islands for bryophyte conservation is stressed. -Author

  8. Studies on Moss Flora Make Progress

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    @@ A research group led by Prof. Gao Qian (Chien Gao) from the CAS Shenyang Institute of Applied Ecology was recently awarded a first prize in natural science by Liaoning Province in recognition of its many years of bryophyte studies. The award was conferred by S&T authorities of the northeast China province.

  9. Mosses from Kakenauwe Natural Reserve and Lambusango Game Reserve, Buton Island, Southeast Sulawesi

    Directory of Open Access Journals (Sweden)

    FLORENTINA INDAH WINDADRI

    2007-07-01

    Full Text Available Species diversity of Bryophyte in Kakenauwe Natural Reserve and Lambusango Game Reserve has never reported before. Recent floristic study recorded 14 species belong to 12 genus and 8 families occur in this area. Five species of them indicated as a new record for Sulawesi.

  10. Enkele notities over de mosvegetatie van een oude Kleigroeve te Venlo

    NARCIS (Netherlands)

    Melick, van H.; During, H.J.

    1976-01-01

    Some details are given on the bryophyte vegetation in an old clay pit near Venlo. Due to burrowing activities, the bottom of the pit has a very broken surface, and in the upper soil layer sand, sandy clay and pure clay (from the Tiglien formation) replace each other. On some places water comes out o

  11. De mossen van de Groninger waddeneilanden. 2. Rottumeroog, Vuurtorenduin en Zuiderduin

    NARCIS (Netherlands)

    Hesse, C.; Kruijer, H.; Lutterop, D.; Kasemir, G.; Ubels, Richard; Corté, B.; van Gennip, B.

    2004-01-01

    Abstract: The mosses of the Wadden Sea islands Rottumeroog, Vuurtorenduin and Zuiderduin (part 2) This is the second paper on the bryophyte flora of the West Frisian barrier islands Rottumerplaat, Rottumeroog, Vuurtorenduin and Zuiderduin. The first paper (Kruijeret al., 2000) gives an overview of t

  12. Moss-inhabiting diatom communities from Heard Island, sub-Antarctic

    NARCIS (Netherlands)

    VandeVijver, B.; Beyens, L.; Vincke, S.; Gremmen, N.J.M.

    2004-01-01

    In this paper, we list 192 diatom taxa, collected from bryophyte samples from Heard Island (52degrees05'S, 73degrees30'E). The Heard Island diatom flora shows a marked similarity to those of the Crozet and Kerguelen archipelagos, and is quite dissimilar to the moss-dwelling diatom flora of Macquarie

  13. Flora of the Mediterranean Rivers in Bulgaria

    Directory of Open Access Journals (Sweden)

    Yordanka G. Hristeva

    2015-06-01

    Full Text Available Species composition and distribution of aquatic bryophytes and vascular plants assemblages in Mediteranean Rivers in Bulgaria are presented in this work. Aquatic macrophytes were studied at thirteen rivers in South Bulgaria during 2014, together with abiotic factors (flow velocity, shading, and substrate type, mean depth and altitude. In total, 73 species were registered, of them 13 bryophytes and 60 vascular plants were identified. Aquatic bryophytes included 10 mosses and 3 liverworts. The recorded bryophytes species refer to 7 families and 12 genera. The most frequently distributed species was Leptodictyum riparium (Hedw. Warnst., followed by Cratoneuron filicinum (Hedw. Spruce and Platyhypnidium riparioides (Hedw. Dixon, Brachythecium rivulare Schimp. and Hygroamblystegium tenax (Hedw. Jenn. The recorded 60 species of vascular plants refer to 25 families and 43 genera. The most common hydrophyte species was Lemna minor L., followed by Ranunculus trichophyllus Chaix, Myriophyllum spicatum L. and Potamogeton nodosus Poir. The most abundant species from the group of helophytes and amphiphytes was Mentha aquatica L., followed by Agrostis stolonifera L. Mentha spicata L., Berula erecta (Huds. Coville, Juncus effusus L., Lycopus europaeus L., Lythrum salicaria L., Phalaris arundinacea L., Ranunculus repens L., Sparganium erectum L., Typha latifolia L., and Veronica anagalis-aquatica L. The majority of studied rivers sites were sunny, with moderate velocity, stony bottom, average depth up to 0.3 m and altitude between 100 and 500 m a.s.l.

  14. NAVAIR Portable Source Initiative (NPSI) Standard for Material Properties Reference Database (MPRD) V2.2

    Science.gov (United States)

    2012-09-26

    Shrub  Forb  Vine  Graminoid  Cactus  Fern  Lichen  Bryophyte MPRD Material Library is conceptually organized as a conventional library...title, revision history , and other administrative information (contact info, licensing, security, etc.) Material element contains the material...Dictionary_Header is the document header containing document title, revision history , and other administrative information (contact info, licensing

  15. Atmospheric heavy metal deposition in the Copenhagen area

    DEFF Research Database (Denmark)

    Andersen, Allan; Hovmand, Mads Frederik; Johnsen, Ib

    1978-01-01

    Atmospheric dry and wet deposition (bulk precipitation) of the heavy metals Cu, Pb, Zn, Ni, V and Fe over the Copenhagen area was measured by sampling in plastic funnels from 17 stations during a twelve-month period. Epigeic bryophytes from 100 stations in the area were analysed for the heavy...

  16. The capability to synthesize phytochelatins and the presence of constitutive and functional phytochelatin synthases are ancestral (plesiomorphic) characters for basal land plants.

    Science.gov (United States)

    Petraglia, Alessandro; De Benedictis, Maria; Degola, Francesca; Pastore, Giovanni; Calcagno, Margherita; Ruotolo, Roberta; Mengoni, Alessio; Sanità di Toppi, Luigi

    2014-03-01

    Bryophytes, a paraphyletic group which includes liverworts, mosses, and hornworts, have been stated as land plants that under metal stress (particularly cadmium) do not synthesize metal-binding peptides such as phytochelatins. Moreover, very little information is available to date regarding phytochelatin synthesis in charophytes, postulated to be the direct ancestors of land plants, or in lycophytes, namely very basal tracheophytes. In this study, it was hypothesized that basal land plants and charophytes have the capability to produce phytochelatins and possess constitutive and functional phytochelatin synthases. To verify this hypothesis, twelve bryophyte species (six liverworts, four mosses, and two hornworts), three charophytes, and two lycophyte species were exposed to 0-36 μM cadmium for 72 h, and then assayed for: (i) glutathione and phytochelatin quali-quantitative content by HPLC and mass spectrometry; (ii) the presence of putative phytochelatin synthases by western blotting; and (iii) in vitro activity of phytochelatin synthases. Of all the species tested, ten produced phytochelatins in vivo, while the other seven did not. The presence of a constitutively expressed and functional phytochelatin synthase was demonstrated in all the bryophyte lineages and in the lycophyte Selaginella denticulata, but not in the charophytes. Hence, current knowledge according to phytochelatins have been stated as being absent in bryophytes was therefore confuted by this work. It is argued that the capability to synthesize phytochelatins, as well as the presence of active phytochelatin synthases, are ancestral (plesiomorphic) characters for basal land plants.

  17. The reproductive biology of Polytrichum formosum : clonal structure and paternity revealed by microsatellites

    NARCIS (Netherlands)

    Van der Velde, M; During, HJ; Van de Zande, L; Bijlsma, R

    2001-01-01

    Using highly polymorphic microsatellite markers, we assessed clonal structure and paternity in a population of the bryophyte species Polytrichum formosum. Identical multilocus genotypes of individual shoots were almost never observed in spatially separated cushions, but were found to be highly clust

  18. Nitrogen limitation in the coastal heath at Anholt, Denmark

    DEFF Research Database (Denmark)

    Johnsen, Ib; Christensen, Steen; Riis-Nielsen, Torben

    2014-01-01

    , Hypogymnia) and bryophytes (genera: Polytrichum, Racomitrium) cover most of the surface. Only two plant species, Corynephorus canescens and Empetrum nigrum, constitute nearly all vascular plant cover and biomass of this calcium poor coastal heath community. Corynephorus and Empetrum increased their cover...

  19. Composition and structure of photosystem I in the moss Physcomitrella patens

    DEFF Research Database (Denmark)

    Busch, Andreas; Petersen, Jørgen; Webber-Birungi, Miriam T.

    2013-01-01

    Recently, bryophytes, which diverged from the ancestor of seed plants more than 400 million years ago, came into focus in photosynthesis research as they can provide valuable insights into the evolution of photosynthetic complexes during the adaptation to terrestrial life. This study isolated...

  20. Earliest land plants created modern levels of atmospheric oxygen

    DEFF Research Database (Denmark)

    Lenton, Timothy M.; Dahl, Tais Wittchen; Daines, Stuart J.

    2016-01-01

    increasing global organic carbon burial-the net long-term source of O2 We use a trait-based ecophysiological model to predict that cryptogamic vegetation cover could have achieved ∼30% of today's global terrestrial net primary productivity by ∼445 Ma. Data from modern bryophytes suggests this plentiful early...

  1. Functional genomic analysis supports conservation of function among cellulose synthase-like a gene family members and suggests diverse roles of mannans in plants

    DEFF Research Database (Denmark)

    Liepman, Aaron H; Nairn, C Joseph; Willats, William G T

    2007-01-01

    , the CslA genes are members of extended multigene families; however, it is not known whether all CslA proteins are glucomannan synthases. CslA proteins from diverse land plant species, including representatives of the mono- and dicotyledonous angiosperms, gymnosperms, and bryophytes, were produced...

  2. Taxonomy and phylogeny of the Caloplaca cerina group in Europe

    DEFF Research Database (Denmark)

    Soun, J.; Vondrak, J.; Sochting, U.

    2011-01-01

    cryptic or semi-cryptic species) and the monophyletic C. stillicidiorum s. lat. that grows mainly on plant debris, small shrubs and bryophytes and consists of at least four internal lineages. All lineages producing vegetative diaspores (soredia, blastidia, isidia or lobules) are phenotypically...

  3. Biomonitoring with lichens on twigs

    DEFF Research Database (Denmark)

    Vilsholm, René Larsen; Wolseley, Pat; Søchting, Ulrik

    2009-01-01

    Two surveys of the lichen and bryophyte flora growing on oak twigs from a Welsh and a Danish locality were compared with additional data on bark pH and % nitrogen in thalli of Hypogymnia physodes. Despite differences in climate and lichen flora, both sites showed a shift in the lichen communities...

  4. Increasing Oil Bodies in Physcomitrella patens by Overexpressing Oil Body- Associated Proteins

    DEFF Research Database (Denmark)

    Bae, Hansol; Peramuna, Anantha Vithakshana; Simonsen, Henrik Toft

    In bryophytes, reproductive organs contain large amount of oil bodies (OBs), the well-known lipidcontaining structures. OBs in spores are the most prominent and have been extensively studied. They are thought to be formed by budding off the outer layer of the endoplasmic reticulum membrane (ER) due...

  5. In vivo assembly of DNA-fragments in the moss, Physcomitrella patens

    DEFF Research Database (Denmark)

    King, Brian Christopher; Vavitsas, Konstantinos; Ikram, Nur Kusaira Binti Khairul

    2016-01-01

    enabled the complete replacement of eukaryotic chromosomes with heterologous DNA. The moss Physcomitrella patens, a non-vascular and spore producing land plant (Bryophyte), has a well-established capacity for homologous recombination. Here, we demonstrate the in vivo assembly of multiple DNA fragments...

  6. The desert moss Pterygoneurum lamellatum (Pottiaceae) exhibits an inducible ecological strategy of desiccation tolerance: effects of rate of drying on shoot damage and regeneration

    Science.gov (United States)

    Premise of the study: Bryophytes are regarded as a clade incorporating constitutive desiccation tolerance, especially terrestrial species. Here we test the hypothesis that the opposing ecological strategy of desiccation tolerance, inducibility, is present in a desert moss, and addressed by varying r...

  7. BIOMONITORING USING AQUATIC VEGETATION

    Science.gov (United States)

    This chapter provides an overview of the state-of-the-science as related to the phytoassessment techniques used in environmental biomonitoring and the hazard assessment process for chemicals. The emphasis is on freshwater angiosperms and bryophytes. Algal species, which are prese...

  8. Increased diversification rates follow shifts to bisexuality in liverworts

    DEFF Research Database (Denmark)

    Laenen, Benjamin; Machac, Antonin; Gradstein, S. Robbert

    2016-01-01

    Shifts in sexual systems are one of the key drivers of species diversification. In contrast to angiosperms, unisexuality prevails in bryophytes. Here, we test the hypotheses that bisexuality evolved from an ancestral unisexual condition and is a key innovation in liverworts. We investigate whether...

  9. The mossy north

    DEFF Research Database (Denmark)

    Mateo, Rubén G.; Broennimann, Olivier; Normand, Signe

    2016-01-01

    , as predicted by theory, and whether the assembly mechanisms differ among taxonomic groups. SR increases towards the south in spermatophytes, but towards the north in ferns and bryophytes. SR patterns in spermatophytes are consistent with their patterns of beta diversity, with high levels of nestedness...

  10. Extended periods of hydration do not elicit dehardening to desiccation tolerance in regeneration trials of the moss Syntrichia caninervis

    Science.gov (United States)

    Dehardening (deacclimation) to water stress is seldom studied in plants, and yet is an integral phase of desiccation tolerance. Most bryophytes are desiccation tolerant (DT), and yet even fully DT species lose a significant portion of their ability to withstand desiccation if dehardened. Shoots of t...

  11. Effects of experimental increase of temperature and drought on heathland vegetation.

    NARCIS (Netherlands)

    Sass-Gyarmati, A.; Papp, B.; Tietema, A.

    2015-01-01

    Effects of simulated environmental changes on heathland vegeta-tion were investigated in Oldebroek, the Netherlands. As response to strong dis-turbance, decrease of the presence/coverage of lichen species was observed; bryophytes have shown various reactions. In the drought plots the normally pre-do

  12. Effects of slash extraction on plant diversity in forests. Final report; Effekter av grotuttag paa vaexters maangfald. Slutrapport

    Energy Technology Data Exchange (ETDEWEB)

    Aastroem, Marcus; Nilsson, Christer [Umeaa Univ. (Sweden). Dept. of Ecology and Environmental Science

    2005-09-01

    This project includes three studies designed to investigate the effects of slash extraction on forest plant diversity. The first study explores the previously unknown effects of commercial slash harvest after clear-felling on bryophytes and vascular plants. Differences between conventionally harvested (i.e. slash left) and slash-harvested stands were investigated 5-10 years after clear-cutting through analysis of 28 paired stands. In each stand we studied vegetation patterns in 0.1 ha plots divided into five 0.02 ha subplots. Species composition of mosses and liverworts in 0.1 ha plots was significantly affected by slash harvest, whereas composition of vascular plant species showed no differences between conventional and slash harvested plots. Species richness of liverworts was significantly reduced by slash harvest in plots of both sizes (0.1 ha and 0.02 ha), whereas moss richness was reduced only in the smaller plot size. The loss of liverwort species was largest, with approximately one third of the species disappearing. The species richness of vascular plants was not significantly affected by slash harvest in either plot size. Slash harvest also reduced species richness of forest bryophytes and of bryophytes typically growing on organic substrates in open habitats. Species richness of non-forest bryophytes on inorganic substrates remained unchanged. The second study evaluates the effects of slash-cover on ground living bryophytes in seven different clear-cuts. By transplanting ten different species of bryophytes in manipulated plots located to north-facing forest edges and the centres of the clear-cuts) we evaluated the effects of branch cover and full exposure on bryophyte growth and vitality. In the more sheltered, north-facing plots there was no difference between treatments. In the centre of the clear-cuts, however, both growth and vitality of exposed bryophytes were significantly lowered in exposed compared to covered plots. The third study investigates the

  13. Biomonitoring of nitrogen pollution. Possibilities and limitations of bioindication techniques; Biomonitoring von Stickstoffimmissionen. Moeglichkeiten und Grenzen von Bioindikationsverfahren

    Energy Technology Data Exchange (ETDEWEB)

    Mohr, K. [Landwirtschaftskammer Niedersachsen, Oldenburg (Germany)

    2007-10-15

    Background and aim. Air pollution caused by oxidized and reduced nitrogen is distributed over wide areas of Europe at a high level. As an alternative or complement to physical measurements and modelling calculations, biomonitoring with plants provides techniques to assess amounts and effects of pollution from oxidized and reduced nitrogen compounds (depositions and concentrations). Many of the previously implemented techniques are based on well-proven standardised methods, e.g. documented in VDI guidelines, modified more or less for a biomonitoring of atmospheric nitrogen pollution. This paper gives a review of the techniques for a biomonitoring of atmospheric nitrogen pollution, their possibilities as well as their limitations. Main features - diversity of the ground vegetation - nitrogen accumulation in vascular plants - exposure of vascular plants - mapping of epiphytic lichens, bryophytes and algae - nitrogen accumulation in lichens and bryophytes - exposure of lichens and bryophytes. Results and Discussion. Important response parameters are nitrogen concentrations in plant tissue (shoot, needle, leave) and biodiversity of plant species. These responses of vascular plants in many cases are influenced by other local varying conditions, in particular the soil. The exposure of vascular plants over a short period provides a standardised quantification of the total atmospheric nitrogen input in a model ecosystem. The enrichment of nitrogen in the plant tissue of bryophytes and lichens from the ground vegetation is closely correlated with the amount of nitrogen deposition. The diversity of epiphytic lichens and the response of exposed Hypogymnia physodes is more sensitive to ammonia than to nitrous oxide, whereas with the diversity of epiphytic bryophytes or the abundance of algae no significant correlation with atmospheric N pollution were found. Conclusions. Some bioindication techniques provide a cause-effect related, partly standardised biomonitoring of nitrogen

  14. Phytosociological and ecological study of springs in Trentino (south-eastern Alps, Italy

    Directory of Open Access Journals (Sweden)

    Alessandro PETRAGLIA

    2011-09-01

    Full Text Available A phytosociological survey of the crenic vegetation was made in Trentino (south-eastern Alps, combining the field method of the Braun-Blanquet approach with a numerical syntaxonomical analysis. A set of 139 phytosociological relevés, including vascular plants and bryophytes, were classified using cluster analysis. The vegetation types were assigned to 7 different phytosociological classes: Platyhypnidio-Fontinalietea antipyreticae, Montio-Cardaminetea, Adiantetea, Scheuchzerio-Caricetea nigrae, Molinio- Arrhenatheretea, Galio-Urticetea, Mulgedio-Aconitetea. The classes Platyhypnidio-Fontinalietea antipyreticae and Montio- Cardaminetea represent the core of crenic vegetation, including permanently or intermittently submerged plant communities, mostly made up of bryophytes, or non-submerged communities dominated by bryophytes or vascular plants. The other classes include chasmophytic bryophyte-rich communities and hygrophilous or tall herb communities lying around the periphery of the springs. 23 vegetation types were identified and, whenever possible, classified at the association level, or as phytocoena. The environmental parameters showed different ranges among vegetation types. A number of environmental variables were recorded during the vegetation survey, including altitude, shading, discharge, flow velocity, with exhaustive hydrochemical sampling. Conductivity, alkalinity and pH showed similar distribution patterns, clearly separating the vegetation types into two distinct groups, differing in the nature of the substratum. The altitudinal range was very broad and shading was also very variable. Nitrate and phosphate levels showed that the majority of vegetation types were irrigated by oligotrophic crenic waters. Finally, the bryophyte-dominated vegetation types belonging to the class Platyhypnidio-Fontinalietea antipyreticae occurred in springs with the highest discharge values and variation. Discriminant analysis confirmed that the

  15. Recovery of three arctic stream reaches from experimental nutrient enrichment

    Science.gov (United States)

    Benstead, J.P.; Green, A.C.; Deegan, Linda A.; Peterson, B.J.; Slavik, K.; Bowden, W.B.; Hershey, A.E.

    2007-01-01

    1. Nutrient enrichment and resulting eutrophication is a widespread anthropogenic influence on freshwater ecosystems, but recovery from nutrient enrichment is poorly understood, especially in stream environments. We examined multi-year patterns in community recovery from experimental low-concentration nutrient enrichment (N + P or P only) in three reaches of two Arctic tundra streams (Kuparuk River and Oksrukuyik Creek) on the North Slope of Alaska (U.S.A.). 2. Rates of recovery varied among community components and depended on duration of enrichment (2-13 consecutive growing seasons). Biomass of epilithic algae returned to reference levels rapidly (within 2 years), regardless of nutrients added or enrichment duration. Aquatic bryophyte cover, which increased greatly in the Kuparuk River only after long-term enrichment (8 years), took 8 years of recovery to approach reference levels, after storms had scoured most remnant moss in the recovering reach. 3. Multi-year persistence of bryophytes in the Kuparuk River appeared to prevent recovery of insect populations that had either been positively (e.g. the mayfly Ephemerella, most chironomid midge taxa) or negatively (e.g. the tube-building chironomid Orthocladius rivulorum) affected by this shift in dominant primary producer. These lags in recovery (of >3 years) were probably driven by the persistent effect of bryophytes on physical benthic habitat. 4. Summer growth rates of Arctic grayling (both adults and young-of-year) in Oksrukuyik Creek (fertilised for 6 years with no bryophyte colonisation), which were consistently increased by nutrient addition, returned to reference rates within 1-2 years. 5. Rates of recovery of these virtually pristine Arctic stream ecosystems from low-level nutrient enrichment appeared to be controlled largely by duration of enrichment, mediated through physical habitat shifts caused by eventual bryophyte colonisation, and subsequent physical disturbance that removed bryophytes. Nutrient

  16. The regional species richness and genetic diversity of Arctic vegetation reflect both past glaciations and current climate

    DEFF Research Database (Denmark)

    Stewart, L.; Alsos, Inger G.; Bay, Christian

    2016-01-01

    correlated with each other, and both showed a positive relationship with landscape age. Plot species richness showed differing responses for vascular plants, bryophytes and lichens. At this finer scale, the richness of vascular plants was not significantly related to landscape age, which had a small effect...... size compared to the models of bryophyte and lichen richness. Main conclusion Our study suggests that imprints of past glaciations in Arctic vegetation diversity patterns at the regional scale are still detectable today. Since Arctic vegetation is still limited by post-glacial migration lag......, it will most probably also exhibit lags in response to current and future climate change. Our results also suggest that local species richness at the plot scale is more determined by local habitat factors...

  17. Relations between vegetation and water level in alkaline fen ecosystems in Denmark

    DEFF Research Database (Denmark)

    Munch Johansen, Ole; Andersen, Dagmar Kappel; Ejrnæs, Rasmus

    2017-01-01

    and low and high water level periods, were calculated based on the water level time series. A complete plant species list was recorded in plots covering 78.5 m2 at each site. Community metrics such as total number of species and the number of bryophytes were generated from the species lists and Ellenberg...... Indicator scores of moisture, pH and nutrients were calculated for each site. The water level correlates with the number of typical fen species of vascular plants, whereas bryophytes are closer connected to the stable water level conditions provided by groundwater seepage. The water level variability...... is proved to be a significant limiting factor for species diversity in wetlands, which should be considered along with the fertility in order to access the habitat quality. The study provides new insight in the water level preferences for GWDTEs which is highly needed in the management and assessment...

  18. Between a Rock and a Dry Place:The Water-Stressed Moss

    Institute of Scientific and Technical Information of China (English)

    Audra J.Charron; Ralph S.Quatrano

    2009-01-01

    The earliest land plants faced a suite of abiotic stresses largely unknown to their aquatic algal ancestors.The descendants of these plants evolved two general mechanisms for survival in the relatively arid aerial environment.While the vascular plants or 'tracheophytes' developed tissue specializations to transport and retain water,the other main lin-eages of land plants,the bryophytes,retained a simple,nonvascular morphology.The bryophytes-mosses,hornworts,and liverworts-continually undergo a co-equilibration of their water content with the surrounding environment and rely to a great extent on intrinsic cellular mechanisms to mitigate damage due to water stress.This short review will focus on the cellular and molecular responses to dehydration and rehydration in mosses,and offer insights into general plant responses to water stress.

  19. Biologic diversity, forest fuels and silviculture: Effects of biomass harvesting in deciduous tree stands. Final report; Biologisk maangfald, skogsbraensle och skoetsel av bestaand: effekter av biomassauttag i loevskog. Slutrapport

    Energy Technology Data Exchange (ETDEWEB)

    Norden, Bjoern [Goeteborg Univ. (Sweden). Botanical Inst.; Goetmark, Frank [Goeteborg Univ. (Sweden). Dept. of Zoology

    2005-06-01

    This report concerns a research project studying biodiversity effects of partial cutting for biofuel harvest in temperate deciduous forest dominated by oaks (abandoned woodland pastures). Partial cutting (30%) resulted in fewer species of wood-decay fungi and bryophytes, but increase of vascular plants. It did not increase survival of oak seedlings in the short term. For epixylic bryophytes and lichens, wood-decay fungi, beetles and mycetophilids, area of valuable forest patches at the landscape level increased local species species richness, but not the number of red-listed and indicator species of vascular plants. We recommend that partial cutting for biofuel is not applied indiscriminantly, and a share of at least 25% of stands should be left as no intervention forests when oak grows mixed with other trees. More caution should be taken in regional areas rich in old deciduous forest, and in south-eastern Sweden.

  20. Studies of Physcomitrella patens reveal that ethylene-mediated submergence responses arose relatively early in land-plant evolution

    KAUST Repository

    Yasumura, Yuki

    2012-10-18

    Colonization of the land by multicellular green plants was a fundamental step in the evolution of life on earth. Land plants evolved from fresh-water aquatic algae, and the transition to a terrestrial environment required the acquisition of developmental plasticity appropriate to the conditions of water availability, ranging from drought to flood. Here we show that extant bryophytes exhibit submergence-induced developmental plasticity, suggesting that submergence responses evolved relatively early in the evolution of land plants. We also show that a major component of the bryophyte submergence response is controlled by the phytohormone ethylene, using a perception mechanism that has subsequently been conserved throughout the evolution of land plants. Thus a plant environmental response mechanism with major ecological and agricultural importance probably had its origins in the very earliest stages of the colonization of the land. © 2012 Blackwell Publishing Ltd.

  1. The decision to germinate is regulated by divergent molecular networks in spores and seeds

    DEFF Research Database (Denmark)

    Vesty, Eleanor F.; Saidi, Younousse; Moody, Laura A.

    2016-01-01

    Dispersal is a key step in land plant life cycles, usually via formation of spores or seeds. Regulation of spore- or seed-germination allows control over the timing of transition from one generation to the next, enabling plant dispersal. A combination of environmental and genetic factors determines...... when seed germination occurs. Endogenous hormones mediate this decision in response to the environment. Less is known about how spore germination is controlled in earlier-evolving nonseed plants. Here, we present an in-depth analysis of the environmental and hormonal regulation of spore germination...... in the model bryophyte Physcomitrella patens (Aphanoregma patens). Our data suggest that the environmental signals regulating germination are conserved, but also that downstream hormone integration pathways mediating these responses in seeds were acquired after the evolution of the bryophyte lineage. Moreover...

  2. Remarkable findings of mosses from the Orthotrichaceae family in the Muránska planina National Park (Slovakia

    Directory of Open Access Journals (Sweden)

    Plášek Vítězslav

    2016-09-01

    Full Text Available The article presents recent findings of epiphytic bryophytes from the Orthotrichaceae family in the Muránska planina National Park. Field surveys were carried out between 2008 and 2016. In total, 111 localities were visited. Altogether, 19 taxa from the Orthotrichaceae family were recorded - 8 of them are new for the territory of the National Park (Dorcadion affine var. bohemicum, D. rupestre, Orthotrichum diaphanum, O. patens, O. scanicum, O. stramineum, Pulvigera lyellii, and Ulota bruchii and 1 as new for Slovakia (Dorcadion affine var. bohemicum. Eleven species are listed on the Red list of bryophytes of Slovakia – EX: Orthotrichum rogeri; CR: Nyholmiella gymnostoma, Orthotrichum patens, O. scanicum; VU: Dorcadion striatum, Ulota bruchii; NT: Dorcadion speciosum, Orthotrichum pallens, Pulvigera lyellii, Ulota crispa; DD: Orthotrichum stramineum. The most interesting findings are briefly discussed.

  3. U.S. Permafrost Delegation Visit to the People’s Republic of China, 15-31 July 1984.

    Science.gov (United States)

    1985-06-01

    Tibetan) Plateau, Geological and Ecological Studies of Qingbai-Xizang Plateau, Vol. 1 and Vol. 2, China Science Press. 1982 Report on Scientific...understanding of the relation- ships of vegetation, substrate , aspect and slope, and climate to permafroqt distribution. Our understanding of similarities and...permafrost. The vegetation is thick bryophyte or else the upper layer of ground is peat. Because of the beat-preserving influence of the vegetation and

  4. Impact of Bryo-Diversity depletion on Land Slides in Nilgiri Hills, Western Ghats (South India) –A Study

    OpenAIRE

    Afroz ALAM; Behera, Kambaska Kumar; Vats, Sharad; Sharma, Deepak; Sharma, Vinay

    2012-01-01

    Since the existence of Nilgiri hills, bryophyte- the miniatures of plant kingdom play an important and crucial role in the stabilization of Blue Mountains ecology. Unlike Himalayas, the landslides were rare in the area, but with the time and changing global environment it had become a common sight. Significantly ever increasing population and vehicular traffic is the prime reason for them, to cater the need, roads are periodically broadened by cutting road sides destroying the habitat as also...

  5. Installation Restoration Program Preliminary Assessment Bear Creek Radio Relay Station, Alaska

    Science.gov (United States)

    1989-04-01

    migration of contaminants; local land use that could affect the potential for exposure to contaminants; and the ecological settings that indicate...and perfect basal cleavage. I MICACEOUS - Consisting of or containing mica. MOSSES - Bryophytic plants having a stem and distinct leaves growing in... substrate is predominantly undrained hydric soil; and (3) the substrate is nonsoil and is saturated with water or covered by shallow water * at some time

  6. Draft Environmental Impact Statement. Guam Cleanup of Uruno Beach

    Science.gov (United States)

    1987-02-01

    marine life in the sensitive marine ecological area. In addition, land transportation to the ocean from the base of the cliff would require...observed. The trunk of the coconut trees were rich with epiphytes, bryophytes , orchids, and ferns. The plateau area vegetation consists chiefly of... substrate is covered by staghorn coral, Acropora hebes which forms dense, flat-topped thickets growing upward to the low tide line. Massive Porites

  7. Ural-Tweed Bighorn Sheep Investigation.

    Science.gov (United States)

    1979-01-01

    downward adjustment in the sheep population through a general decrease in productivity and lamb survival. Through time, ecological succession has been a...are S described below: 1) Rockland is characterized by a low total canopy coverage of bryopbytic as well as non- bryophytic vegetation. Lichens, mosses...classes; snow condition was classed as wet, powder, packed, crusted or frozen; substrate was classed as bedrock, talus, rocky soil, or developed soil

  8. Cryptogams as indicator organisms in ecology and conservation biology

    OpenAIRE

    Simmel, Josef

    2017-01-01

    The present thesis was designed to compare the influence of land-use effects on three groups of cryptogam species, namely the bryophytes, lichens, and macromycetes. Further topics were to newly develop an indicator value system for macromycetes and to compile a broad overview of functional traits applicable to macromycetes. These research topics are intended to (further) stimulate ecological research using macromycetes. In Chapter 2, I present a methodology for Ellenberg indicator values ...

  9. Proceedings of a Seminar on Water Quality Data Interpretation, 8-9 February 1978, Atlanta, Georgia.

    Science.gov (United States)

    1978-01-01

    on fisheries and other habitats ? f. What about reservoir eutrophication and problems of algal blooms? How does this affect project purposes such as...control them? c. Reservoir Release Criteria - what is required to maintain a suitable downstream habitat how may the effects of algal re- leases be...flowering plants, certain large algae Paper 9 and also aquatic bryophytes (mosses) are also referred to as macrophytes. For example, the macroalga, Chara

  10. Protocol for Large-Scale Collection, Processing, and Storage of Seeds of Two Mesohaline Submerged Aquatic Plant Species

    Science.gov (United States)

    2006-08-01

    quantities sufficient to restore underwater grass habitats on a scale of hectares. Although this system was developed for P. perfoliatus and R. maritima...dispersing plants to new habitats . Embryos formed in seeds are better protected and have more abundant food reserves than those in other plant groups like...the bryophytes and pterido- phytes (Batygina 2002, Fernald 1970). Auxiliary seed tissues provide mechanisms for efficient embryo (seed) dispersal

  11. Environmental Engineering and Ecological Baseline Investigations along the Yukon River-Prudhoe Bay Haul Road.

    Science.gov (United States)

    1980-09-01

    20 8. Generalized bedrock types encountered along the Haul Road 22 9. Vegetation classification of sites 44 10. New and interesting bryophytes and...Galbraith Lake to the Sagwon bluffs, and a sedge-meadow type on the Coastal Plain. Differentiation of this region from the Coastal Riparian habitats ...area, tamarack (Larix laric- Coastal Plain. Riparian habitats , late-lying snow- ina) can be an occasional component on wetter beds, rock outcrops and

  12. 甘肃省首次发现泥炭藓科(Sphagnaceae)植物%Discovery of a moss family Sphagnaceaein Gansu Province

    Institute of Scientific and Technical Information of China (English)

    韩国营; 于宁宁; 任昭杰; 赵遵田

    2008-01-01

    Previously,more than 400 species of bryophytes in Gansu Province were reported;however,there was no any species of the moss family Sphagnaceae[1-5].In 2006,we collected a specimen of the family Sphag naceae from Baishuijiang National Nature Reserve in Gansu Province.Then three specimens of diferentcommunities were gathered again from this area in 2007.We provide the picture concerning its natural habitat in the paper(Fig.1).

  13. Prehistoric and Historic Cultural Resources of Selected Sites at Harlan County Lake, Harlan County, Nebraska: Test Excavations and Determination of Significance for 28 Sites

    Science.gov (United States)

    1987-01-01

    429 91 Freshwater mussels . . . . . . . . . . . . . 433 92 Fauna from 25HN36 . ........... . 435 93 Preferred habitats of fauna from...Unit I Picea Qlauca white spruce, numerous needles, twigs and a few cones bryophytes mosses insects MNI percentage Gastocopta rmife mollusc 20 0.67...to be extinct bison (B. occidentalis). While bison occured in a variety of Pleistocene habitats , nobel marten was somewhat more restricted in its

  14. Final Environmental Assessment: Western Range Command Transmit Site Vandenberg Air Force Base, California

    Science.gov (United States)

    2005-01-20

    2004b. Special Vascular Plants, Bryophytes , and Lichens List. Department of Fish and Game Wildlife and Habitat Analysis Branch. California...result in minor adverse impacts to wildlife due to the permanent loss of low- value wildlife habitat as well as low quality habitat for special status...3-3 3.1.4 Sensitive Habitats and Special Status Species .............................................. 3-4 3.1.4.1 Habitats and Plant

  15. Vegetation Sampling for Wetland Delineation: A Review and Synthesis of Methods and Sampling Issues

    Science.gov (United States)

    2010-07-01

    and floristic habitat sampling for estimating bryophyte diversity. Diversity and Distributions 11(1): 57–72. Niemi, G. J., and M. E. Mcdonald. 2004...non-wetland habitats . Observed differences in the relative frequency with which a species occurs in wetlands provides the basis for the National and...where communities are viewed as loose aggregations of independently distributed plant species that co-occur because of similarities in habitat

  16. Bioaccumulation and Food Chain Transfer of Polycyclic Aromatic Hydrocarbons and Heavy Metals: A Laboratory and Field Investigation.

    Science.gov (United States)

    1992-10-14

    and runs comprising the majority of stream habitat . Flow is dependent upon snowmelt with high flow occurring during spring runoff. Riparian canopy is...attempted to collect three replicates for each taxa at each station. However, as a result of habitat requirements, life history, and/or metal toxicity...differences in Zn, Cd, and Pb accumulation by freshwater algae and bryophytes , Hydrobiologgia. 175:1-11. Krantzberg, G. 1989. Metal accumulation by

  17. Characteristics of atypical Huperzia selago subsp. arctica habitats to the south of distribution area

    Directory of Open Access Journals (Sweden)

    Ilona Jukonienė

    2012-05-01

    Full Text Available Two localities for Huperzia selago subsp. arctica are recorded from Lithuania, to the south of its known distribution area. The habitats of this subspecies are cutover peatlands whose natural vegetation was disturbed 6-8 years ago during peat exploitation. One of the dominant species of latest vegetation cover is the invasive bryophyte Campylopus introflexus. Characteristics of the habitats of H. selago subsp. arctica and the frequency of this taxon in populations were analysed.

  18. Plant mitochondrial genome peculiarities evolving in the earliest vascular plant lineages

    Institute of Scientific and Technical Information of China (English)

    Volker KNOOP

    2013-01-01

    In plants,the mitochondrial DNA has evolved in peculiar ways.Simple circular mitochondrial genomes found in most other eukaryotic lineages have expanded tremendously in size.Mitochondrial DNAs in some flowering plants may in fact be larger than genomes of free-living bacteria.Introns,retrotransposons,pseudogene fragments,and promiscuous DNA copied from the chloroplast or nuclear genome contribute to the size expansion but most intergenic DNA remains unaccounted for so far.Additionally,frequent recombination results in heterogeneous pools of coexisting,subgenomic mtDNA molecules in angiosperms.In contrast,the mitochondrial DNAs of bryophytes,the extant representatives of very early splits in plant phylogeny,are more conservative in structural evolution and seem to be devoid of active recombination.However,whereas mitochondrial introns are highly conserved among seed plants (spermatophytes),not a single one of more than 80 different introns in bryophyte mtDNAs is conserved among the three divisions,liverworts,mosses,and hornworts.Lycophytes are now unequivocally identified as living representatives of the earliest vascular plant branch in a crucial phylogenetic position between bryophytes and later diversifying tracheophytes including spermatophytes.Very recently,mtDNAs have become available for the three orders of extant lycophytes-Isoetales,Selaginellales,and Lycopodiales.As I will discuss here,the lycophyte mtDNAs not only show a surprising diversity of features but also previously unseen novelties of plant mitochondrial DNA evolution.The transition from a gametophyte-dominated bryophyte lifestyle to a sporophytedominated vascular plant lifestyle apparently gave rise to several peculiar independent changes in plant chondrome evolution.

  19. Liverworts of peatlands and tepualia stipularis (hook. & arn.) griseb. swamp forests in isla grande de chiloé (chile): key for identification

    OpenAIRE

    León, Carolina; Oliván, Gisela

    2014-01-01

    Bryophytes play a key role in peatland ecosystems; they participate directly in the constitution of peat and in the maintenance of these ecosystems. Nevertheless, the knowledge of this group is highly limited, specifically for liverworts. Therefore, we present a key to determine liverworts, restricted to peatland habitats and swamp forests of Tepualia stipularis (Hook. & Arn.) Griseb. of Isla Grande de Chiloé (Chile). This key includes the main reported taxa for these ecosystems and it is...

  20. Physical stress and diversity-productivity relationships: The role of positive interactions

    OpenAIRE

    2001-01-01

    If environmental stress provides conditions under which positive relationships between plant species richness and productivity become apparent, then species that seem functionally redundant under constant conditions may add to community functioning under variable conditions. Using naturally co-occurring mosses and liverworts, we constructed bryophyte communities to test relationships between species diversity (1, 2, 4, 8, 16, 24, or 32 species) and productivity under c...