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Sample records for bryophyta

  1. Physiological Activity of Bryophyta%苔藓植物的生理活性

    Institute of Scientific and Technical Information of China (English)

    朱秀敏

    2011-01-01

    Many kinds of pharmacological activities of bryophyta were introduced, such as antibiosis, anticancer and preventing and curing disease of cardiovascular system.%介绍了苔藓植物的多种药理活性,如抗菌、抗癌、防治心血管系统疾病等.

  2. AN INVENTORY OF Fissidens spp. (Fissidentaceae, Bryophyta IN CIBODAS BOTANIC GARDEN

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    Eka Aditya Putri Iskandar

    2010-01-01

    Full Text Available Inventarisasi Fissidens spp. (Fissidentaceae, Bryophyta di Kebun Raya Cibodas telah dilakukan. Pengoleksian dilakukan pada blok-blok yang ada di Kebun Raya Cibodas dan karakteristik dari setiap lokasi pengoleksian dicatat. Sebanyak enam puluh tujuh koleksi berhasil dikumpulkan dan diidentifikasi, yang mencakup 40% dari jenis-jenis yang disebutkan oleh Fleischer (1900-1902. Kunci determinasi menuju jenis-jenis Fissidens disajikan pula. Tiga jenis catatan baru dari Cibodas dilaporkan pada makalah ini, yaitu F. perpusillus, F. bryoides subsp. schmidii dan F. obscurirete.

  3. Richness of Marchantiophyta and Bryophyta in a protected area of the Brazilian Amazon

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    Luciana Priscila Costa Macedo

    2014-12-01

    Full Text Available The bryophytes of Gurupi Biological Reserve represent an important component of the biodiversity of the Amazon in the Brazilian state of Maranhão. This study aimed to investigate the richness of bryophytes (Marchantiophyta and Bryophyta from Gurupi Biological Reserve and compare it with that found in other surveys conducted in Maranhão and in the northeastern part of the state of Pará, because the latter shows similarities with the study area in terms of vegetation, geography, demography, and history of occupation. We recorded 983 occurrences of bryophytes (549 Marchantiophyta and 434 Bryophyta corresponding to 62 species (43 liverworts and 19 mosses, 39 genera, and 12 families. Of those 62 species, 25 have previously been collected from all regions of Brazil, two are restricted to two regions, and four are restricted to the northern (Amazon region. The bryophyte species identified within the reserve correspond to 28.9% of the known bryophytes in Maranhão and 31.3% of the known bryophytes in northeastern Pará, the reserve therefore more closely resembling the latter area. The exclusively Amazonian elements found in the reserve underscore their affinity for this biome and their presence in the state of Maranhão. The importance of this conservation area to Maranhão and to the Amazon region of the state is confirmed by the high number of new records for the state (41 species, five of which are also new records for northeastern Brazil.

  4. Micro-pollutant exchanges at the water-bryophyta interface: monitoring of the copper concentration in nuclear power plants

    International Nuclear Information System (INIS)

    The purpose of this study is to calibrate and validate a descriptive model of the copper exchanges at the water-bryophyta interface. In theory, this model should allow calculation of the average concentrations of copper dissolved in water, using spot measurements on the bryophyta. The calibration procedure, based on mathematical use of laboratory data, demonstrated that the kinetic coefficients representing the processes of accumulation and release of the micro-pollutant by aquatic mosses, are effectively independent of the copper concentration in the water in contact with these latter, and that the reactional diagram proposed is thus well suited to representing exchanges at the water-bryophyta interface. The data collected during monitoring of the metal flows emitted by the nuclear power plants at Cattenom, Dampierre and Nogent/Seine enabled the validity of the model to be tested over a relatively large range of concentrations. The results obtained on the Cattenom and Dampierre sites would appear to be satisfactory: over the majority of control points selected, we noted good correlation between the measured and calculated concentrations of copper dissolved in water. In particular, the simulations run on periods of from 7 to 10 days show that the method is well suited to medium-term monitoring. On the other hand, the model proved inadequate for interpreting the measurements acquired during monitoring of releases from the Nogent/Seine plant set up for winter conditions. Consequently the dissolved copper estimates, calculated according to the model, considerably overestimate the actual values measured by atomic and absorption spectrometry and by voltametry. It would seem that these results can be attributed to a particular speciation of the copper on the site studied. Subsequent studies would seem necessary to confirm this point. (author). 5 refs., 10 figs., 10 tabs

  5. Micro-pollutant exchanges at the water-bryophyta interface: monitoring of the copper concentration in nuclear power plants; Echanges de micropolluants a l`interface eau-bryophytes: suivi de la concentration en cuivre dans les centrales nucleaires

    Energy Technology Data Exchange (ETDEWEB)

    Ciffroy, P.

    1994-12-31

    The purpose of this study is to calibrate and validate a descriptive model of the copper exchanges at the water-bryophyta interface. In theory, this model should allow calculation of the average concentrations of copper dissolved in water, using spot measurements on the bryophyta. The calibration procedure, based on mathematical use of laboratory data, demonstrated that the kinetic coefficients representing the processes of accumulation and release of the micro-pollutant by aquatic mosses, are effectively independent of the copper concentration in the water in contact with these latter, and that the reactional diagram proposed is thus well suited to representing exchanges at the water-bryophyta interface. The data collected during monitoring of the metal flows emitted by the nuclear power plants at Cattenom, Dampierre and Nogent/Seine enabled the validity of the model to be tested over a relatively large range of concentrations. The results obtained on the Cattenom and Dampierre sites would appear to be satisfactory: over the majority of control points selected, we noted good correlation between the measured and calculated concentrations of copper dissolved in water. In particular, the simulations run on periods of from 7 to 10 days show that the method is well suited to medium-term monitoring. On the other hand, the model proved inadequate for interpreting the measurements acquired during monitoring of releases from the Nogent/Seine plant set up for winter conditions. Consequently the dissolved copper estimates, calculated according to the model, considerably overestimate the actual values measured by atomic and absorption spectrometry and by voltametry. It would seem that these results can be attributed to a particular speciation of the copper on the site studied. Subsequent studies would seem necessary to confirm this point. (author). 5 refs., 10 figs., 10 tabs.

  6. Preliminary Research on Bryophyta Resources In the Heicha Mountain Nature Reserve%黑茶山自然保护区苔藓植物资源初步研究

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    王振军

    2012-01-01

    Through field investigation,literature review,data collation and analysis,a preliminary research for Bryophyta resources was conducted in the Heicha Mountain Natural Reserve.The results showed that,there are 223 species of moss in the Heicha Mountain Reserve,belonging to 74 genus of 33 families,among which Hepaticae has 15 species,10 genus of 9 families,and moss has 2 variants,11 varieties,195 species,64 genus of 24 families;Bryophyta temperate flora composition has 32 genus and 74.3% of the region's,the temperate zone property has an absolute advantage.Tropical flora composition for 2 genus,showed certain tropical origin.Bryophyta community are divided into four types,namely aquatic community,rock community,soil communities and wood community.For bryophyta,the protection should be adopted predominantly,and its utilization should be strictly controlled.%通过实地调查、查阅文献、数据整理和分析,对黑茶山自然保护区苔藓植物资源进行了初步研究。结果表明,黑茶山保护区内共有苔藓植物33科74属223种,其中苔类植物9科10属15种,藓类植物24科64属195种11个变种2个变型;苔藓植物温带区系成分有26属,占该地区的74.29%,温带性质占有绝对优势,热带区系成分为2属,表明了一定的热带渊源;本区苔藓植物群落有4种类型,即水生群落、石生群落、土生群落和木生群落。对保护区苔藓植物要以保护为主,严格控制开发利用。

  7. Flora Malesiana, Series III: Bryophyta

    NARCIS (Netherlands)

    Wijk, van der R.

    1951-01-01

    Scope, organization, and purpose of Series III, Flora Malesiana (Musci and Hepaticae) are explained. Collaboration is asked on the following points: (a) To collect Mosses and Hepaticae in Malaysia and to add extensive and detailed data to the specimens (directions available on application to the Edi

  8. Diversidade, taxonomia e distribuição por estados brasileiros das famílias Bartramiaceae, Brachytheciaceae, Bryaceae, Calymperaceae, Fissidentaceae, Hypnaceae e Leucobryaceae (Bryophyta da Estação Científica Ferreira Penna, Caxiuanã, Pará, Brasil Diversity, taxonomy and distribution for brazilian states of the families Bartramiaceae, Brachytheciaceae, Bryaceae, Calymperaceae, Fissidentaceae, Hypnaceae and Leucobryaceae (Bryophyta of the Scientific Station Ferreira Penna, Caxiuanã, Pará, Brazil

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    Eryka de Nazaré Rezende Moraes

    2009-01-01

    Full Text Available Foi realizado o inventário das espécies de musgos (Bryophyta da Estação Científica Ferreira Penna, município de Melgaço, estado do Pará. Esta estação possui 85% de sua área ocupada por mata de terra firme, bem conservada. Sua vegetação de fanerógamas já está relativamente estudada. Porém o estudo dos musgos está avançando agora com este trabalho. Além de inventariar as espécies de musgos ocorrentes na área, outros objetivos são ampliar a distribuição geográfica das espécies ainda não referidas para a região, registrar o tipo de substrato e ecossistema onde elas ocorrem. Foram identificadas 84 espécies, 37 gêneros e 19 famílias. Esse trabalho é parte dos estudos realizados com os musgos da ECFPn, tratando apenas das 47 espécies pertencentes às famílias Bartramiaceae, Brachytheciaceae, Bryaceae, Calymperaceae, Fissidentaceae, Hypnaceae e Leucobryaceae. Para cada táxon foram citados, herbário, referências de descrições, comentários com as características diagnósticas, habitats, distribuição geográfica brasileira e material examinado. São novas referências para Amazônia Brasileira, Fissidens pauperculus M. Howe e Octoblepharum costatum H. A.Crum e para o estado do Pará, Syrrhopodon incompletus Schwägr. var. berteroanus (Brid. W. D. Reese e Leucobryum crispum Müll. Hal.The inventory of the species of mosses (Bryophyta was conducted in the Scientific Station Ferreira Penna, municipality of Melgaço, state of Pará. This station possesses 85% of its area of well conserved, terra-firme vegetation. Although the phanerogams are relatively well studied, the mosses are only now moving forward with this work. Besides inventorying the species of mosses inhabiting the area, other objectives are to expand knowledge regarding the geographical distribution of the species reported for the area, and to register the substratum type and ecosystem where they occur. There were identified 84 species, 37 genera and 19

  9. 中国青藓科植物分类学修订(Ⅱ):燕尾藓属%A Revision of Chinese Brachytheciaceae (Bryophyta)Ⅱ:Bryhnia Kaurin

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    李敏; 魏倩倩; 王晓蕊; 王幼芳

    2016-01-01

    Since Bryhnia Kaurin (Bryophyta:Brachytheciaceae ) has been reduced to a synonym of Brachythecium Schimp.s.str.,the genus does not exist yet.In this paper,five species of Bryhnia dis-tributed in China were revised.Results are as follows:B.hultenii E.B.Bartram,B.novae-angliae (Sull.& Lesq.)Grout and B.trichomitria Dixon & Thér.are transferred into Brachythecium s.str.as Brachytheciumhultenii (E.B.Bartram)Min Li & Y.F.Wang,B.novae-angliae (Sull.& Lesq.)A. Jaeger and B.trichomitrium (Dixon & Thér.)Huttunen,Ignatov,Min Li & Y.F.Wang;Bryhnia brachycladula Cardot is transferred into Myuroclada Besch.and reduced to a synonym of M.longiramea (Müll.Hal.)Min Li,Y.F.Wang,Ignatov & Huttunen;Bryhniaserricuspis (Müll Hal.)Y.F.Wang& R.L.Hu is transferred into the genus Pseudokindbergia Min Li,Y.F.Wang,Ignatov &B.C.Tan. and treated as a synonym of P.dumosa (Mitt.)Min Li,Y.F.Wang,Ignatov & B.C.Tan.%基于燕尾藓属(Bryhnia Kaurin)被处理为狭义青藓属(Brachythecium Schimp.s.str.)的异名,燕尾藓属已不复存在。笔者对原分布于中国的5种燕尾藓属植物进行了相应的分类学修订,结果如下:短尖燕尾藓(B. hultenii E.B.Bartram)、燕尾藓[B.novae-angliae (Sull.& Lesq.)Grout]和毛尖燕尾藓(B.trichomitria Dixon& Thér.)被移入狭义青藓属并处理为短尖青藓[Brachythecium hultenii (E.B.Bartram)Min Li & Y.F. Wang]、燕尾青藓[B.novae-angliae (Sull.& Lesq.)A.Jaeger]和东亚青藓[B.trichomitrium (Dixon & Thér.) Huttunen,Ignatov,Min Li &Y.F.Wang];短枝燕尾藓(B.brachycladula Cardot)被移入鼠尾藓属(Myuroclada Besch.),并处理为羽枝鼠尾藓[M.longiramea (Müll.Hal.)Min Li,Y.F.Wang,Ignatov & Huttunen]的异名;密枝燕尾藓[B.serricuspis (Müll Hal.)Y.F.Wang & R.L.Hu]移入拟异叶藓属(Pseudokindbergia Min Li, Y.F.Wang,Ignatov & B.C.Tan),并处理为拟异叶藓[P.dumosa (Mitt.)Min Li,Y.F.Wang,Ignatov & B. C.Tan]的异名。

  10. Philonotis calcarea (Bryophyta in the Opole Province (Poland

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    Stebel Adam

    2014-03-01

    Full Text Available Philonotis calcarea (Bruch & Schimp. Schimp. in Poland is a montane species, very rarely occurring in lowland, strictly protected by law. In the Opole Province till this time it has been known from four localities, reported from the 19th and first half of the 20th century. The paper presents description of the new locality and list of stations of P. calcarea in the Opole Province. Current distribution of this species is presented on the map.

  11. Musgos (Bryophyta na Ilha Trambioca, Barcarena, PA, Brasil Mosses (Bryophyta in Trambioca Island, Barcarena, Pará State, Brazil

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    Adriana Paula da Silva Souza

    2005-09-01

    Full Text Available Foi realizado o inventário dos musgos em diferentes ecossistemas da Ilha Trambioca, município de Barcarena, PA. Foram encontradas 40 espécies, pertencentes a 20 gêneros e 13 famílias. As famílias com maior número de espécies foram Calymperaceae (12 spp., Sematophyllaceae (6 spp. e Leucobryaceae (5 spp., as quais destacaram-se também quanto ao número de indivíduos. As espécies mais comuns foram Sematophyllum subsimplex (Hedw. Mitt, Calymperes erosum Müll. Hal., Pilosium chlorophyllum (Hornsch. Müll. Hal., Taxithelium planum (Brid. Mitt., Callicostella pallida (Hornsch. Årgstr. e Trichosteleum papillosum (Hornsch. A. Jaeger. Evidenciou-se maior diversidade de espécies na mata de terra firme, confirmando a preferência das briófitas por este ecossistema. Philonotis gracillima Ångstr. é citada como primeira referência para o Estado do Pará.This work presents a survey of mosses from different ecosystems of Trambioca Island, municipality of Barcarena, Pará State, Brazil. Forty taxa of mosses were found, belonging to 20 genera and 13 families. The families with highest number of species were Calymperaceae (12 spp., Sematophyllaceae (6 spp., and Leucobryaceae (5 spp., which also presented the highest number of individuals. The most common species were Sematophyllum subsimplex (Hedw. Mitt, Calymperes erosum Müll. Hal., Pilosium chlorophyllum (Hornsch. Müll. Hal., Callicostella pallida (Hornsch. Årgstr., and Trichosteleum papillosum (Honrsch. A. Jaeger. It was observed a higher richness of species in the primary low land rainforest, confirming the preference of bryophytes for this ecosystem. Philonotis gracillima Ångstr. is mentioned as the first report to Pará State.

  12. Effect of air pollution on the epiphytic bryophytae and lichens - distribution of epiphytic bryophytae and lichens in Omuta City

    Energy Technology Data Exchange (ETDEWEB)

    1975-03-01

    The species and coverage rate of epiphytic plants such as bryophytes and lichens on cherry trees, Cinnamomum camphora and Ile x rotunda in Omuta City were surveyed. The distribution of such plants showed somewhat similar trends to the distribution of falling dust. A direct correlation between the amount of falling dust and the distribution of epiphytic plants could not be studied.

  13. La familia Cryphaeaceae (Bryophyta en los bosques del noroeste de Argentina The family Cryphaeaceae (Bryophyta in the forests of Northwest Argentina

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    Guillermo M Suárez

    2010-06-01

    Full Text Available La familia Cryphaeaceae en los Bosques del Noroeste de Argentina. Se presenta la revisión taxonómica de la familia Cryphaeaceae en los bosques del Noroeste de Argentina (NOA. Se reconocen dos géneros para el NOA, Cryphaea y Schoenobryum. Se registra por primera vez para el país C. apiculata y se amplia el área de distribución de C. patens y C. jamesonii. Cryphaea rhacomitrioides y C. furcinervis se reconocen como dos especies independientes y se conserva a C. lorentziana en Cryphaea. Se presentan descripciones, ilustraciones y mapas de distribución de las especies para el Noroeste de Argentina.A taxonomic revision of the family Cryphaeaceae in the forests of Northwest of Argentina (NWA is presented. Two genera, Cryphaea and Schoenobryum, are accepted in the NW. Cryphaea apiculata is recorded for the first time for the country and, the geographic distribution of C. patens and C. jamesonii is extended. Cryphaea rhacomitriodes and C. furcinervis are recognized as different species and C. lorentziana is conserved in Cryphaea. Descriptions, illustrations and distribution maps of the species for NW of Argentina are provided.

  14. Leucophanaceae, nova família de Bryophyta para o Pará, Brasil Leucophanaceae, a new family of Bryophyta to Pará, Brazil

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    Regina C. L Lisboa

    1997-07-01

    Full Text Available A ocorrência de Leucophanaceae, representada nos neotrópicos pela espécie Leucophanes molleri C. Müll., é registrada no estado do Pará. No Brasil, a espécie apresenta distribuição disjunta, sendo encontrada apenas nas regiões norte e sudeste. A morfologia de L. molleri é apresentada, baseada em fotomicrografias.The ocurrence of Leucophanaceae, represented in the Neotropic by Leucophanes molleri C. Müll., is presented. The disjunct distribution of the specie in the Brazil, where was collected in the north and southeast regions, it is emphasized. Also is presented the morphology of L. molleri, with photomicrographs.

  15. Helicophyllaceae (Bryophyta, nova ocorrência para o Estado do Pará, Brasil Helicophyllaceae (Bryophyta, a new record to Pará State, Brazil

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    Regina C. L. Lisboa

    2005-09-01

    Full Text Available Helicophyllaceae, família monotípica neotropical, é registrada pela primeira vez no Estado do Pará. Sua única espécie, Helicophyllum torquatum (Hook. Brid., registrada anteriormente no Estado do Amazonas e que recentemente havia sido excluída da lista de musgos amazônicos, é apresentada como nova ocorrência para toda a Amazônia brasileira.Helicophyllaceae, a monotypic family of Neotropics, is presented for the Pará State. Helicophyllum torquatum (Hook. Brid., the single species, was recorded for the Amazonas State, but recently was excluded of checklist of Amazonian mosses. H. torquatum is considered a new report for all Brazilian Amazônia.

  16. Molecular data do not support the current division of Orthotrichum (Bryophyta) species with immersed stomata

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    Jakub SAWICKI; Vítězslav PL(A)(S)EK; Monika SZCZECI(N)SKA

    2012-01-01

    Genetic relationships between 27 Orthotrichum species of the subgenera Orthotrichum and Pulchella were reconstructed using the internal transcribed spacer regions 1 and 2,the chloroplast trnH-psbA region,and intron-exon splice junction (ISJ) and inter-simple sequence repeats (ISSR) markers.A phylogenetic analysis did not reflect the current division of the subgenus Pulchella into the sections Diaphana,Pulchella,and Rivularia.Species of the section Rivularia did not form a monophyletic group,and the only markers that indicated the distinctness of the section Pulchella were ISJ and ISSR.The most genetically diverse section was Diaphana,whose species were divided into several clades.The only proper phylogenetic unit was the subgenus Orthotrichum.The applied markers revealed the process of cryptic speciation in species of both subgenera.

  17. Macroinvertebrates associated with bryophyta in a first-order Atlantic Forest stream

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    Beatriz F. J. V. Rosa

    2011-06-01

    Full Text Available This study describes the composition and structure of the benthic community associated with bryophytes in a first-order stream, located in a biological reserve of the Atlantic Forest, during two seasons. During three months of the dry season of 2007 and three months of the rainy season of 2008, samples of bryophytes attached to stones were collected randomly, along a 100 m stream reach. The structure of the community was analyzed through the mean density of individuals, Shannon's diversity index, Pielou's evenness, family richness, dominance index, and the percentage of Ephemeroptera, Plecoptera and Trichoptera (% EPT. Chironomidae larvae were dominant in the two periods of study, followed by Ceratopogonidae in the rainy season, and Naididae in the dry season. The orders EPT contributed 14 families. The results showed that bryophytes constitute suitable habitat which is able to shelter an abundant and diversified benthic fauna in a small extension of the stream. This habitat provides refuge during spates, and thus minimizes downstream transport of the macroinvertebrate fauna.

  18. A catalog of Bryophyta types deposited at the National Museum of Brazil

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    Paulo E.A.S. Câmara

    2014-12-01

    Full Text Available While visiting the Herbarium of the Botany Department of the National Museum of the Federal University of Rio de Janeiro (code, R, we located the types of 219 bryophyte names, most of which were published by Karl Müller (cited as Müller Hallensis, whose holotypes were lost during the bombing of the Berlin Herbarium in 1943. A total of 181 names (82% are possible candidates for lectotypification and most likely not to be found elsewhere. We also found the complete collection of Müller's "Bryologia Serrae Itatiaiae", made by Ernst Ule.

  19. Pohlia section Cacodon (Mielichhoferiaceae, Bryophyta with axillary bulbils in the Iberian Peninsula

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    Guerra, Juan

    2007-06-01

    Full Text Available A taxonomic and descriptive study is presented of the propaguliferousspecies –with axillary bulbils– of section Cacodon of the genus Pohlia in the Iberian Peninsula. Among the nine species of this section present in the Iberian Peninsula, seven produce axillary propagula (bulbils. The propagulum morphology, seen to be the most relevant gametophyte identification character, is described. Data are provided on the habitat and distribution of the species in the Iberian Peninsula, where they are considered rare or very rare.Se realiza un estudio taxonómico y descriptivo de las especies con bulbillos axilares de la sección Cacodon del género Pohlia, existentes en la Península Ibérica. De las nueve especies de la sección presentes en el área, siete producen propágulos (bulbillos de origen caulinar. Se describe la morfología de estos propágulos, que resulta ser el carácter más relevante para la identificación de las especies. Se aportan datos sobre hábitat y distribución en la Península Ibérica, donde pueden considerarse raras o muy raras.

  20. A molecular phylogeny of Hypnales (Bryophyta inferred from ITS2 sequence-structure data

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    Wolf Matthias

    2010-11-01

    Full Text Available Abstract Background Hypnales comprise over 50% of all pleurocarpous mosses. They provide a young radiation complicating phylogenetic analyses. To resolve the hypnalean phylogeny, it is necessary to use a phylogenetic marker providing highly variable features to resolve species on the one hand and conserved features enabling a backbone analysis on the other. Therefore we used highly variable internal transcribed spacer 2 (ITS2 sequences and conserved secondary structures, as deposited with the ITS2 Database, simultaneously. Findings We built an accurate and in parts robustly resolved large scale phylogeny for 1,634 currently available hypnalean ITS2 sequence-structure pairs. Conclusions Profile Neighbor-Joining revealed a possible hypnalean backbone, indicating that most of the hypnalean taxa classified as different moss families are polyphyletic assemblages awaiting taxonomic changes.

  1. New taxonomical arrangement of the traditionally conceived genera Orthotrichum and Ulota (Orthotrichaceae, Bryophyta

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    Plášek Vítězslav

    2015-10-01

    Full Text Available The traditionally conceived genera Orthotrichum Hedw. and Ulota F.Weber are here reclassified into six genera, Orthotrichum, Dorcadion Lindb., Nyholmiella Holmen & E.Warncke, Pulvigera Plášek, Sawicki & Ochyra, Plenogemma Plášek, Sawicki & Ochyra, and Ulota, based on morphological differences and partially on molecular evidence. The genus Pulvigera includes P. lyellii (Hook. & Taylor Plášek, Sawicki & Ochyra (Orthotrichum lyellii Hook. & Taylor which was selected as its generitype. The genus Plenogemma includes P. phyllantha (Brid. Plášek, Sawicki & Ochyra (Ulota phyllantha Brid. which was selected as its generitype.

  2. Notes on Brachytheciaceae (Bryophyta) of China%中国青藓科新资料

    Institute of Scientific and Technical Information of China (English)

    魏倩倩; 李敏; 李晓芹; 买买提明·苏来曼; 王幼芳

    2013-01-01

    通过对模式标本、国外借阅标本及采自新疆维吾尔自治区的青藓科植物的研究,报道青藓科中国新记录1种:糙柄青藓[Brachythecium trachypodium (Funck ex Brid.)Schimp.],重新确定了曾有文献记载但缺少图文描述的高山青藓[Brachythecium collinum (Schleich.ex Mül1.Ha1.)Schimp.]和直枝同蒴藓[Homalothecium philippeanum (Spruce) Schimp.]在中国的分布,并提供了详细的形态描述及图版.为中国青藓科植物提供新资料.

  3. Does the core circadian clock in the moss Physcomitrella patens (Bryophyta comprise a single loop?

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    Hedman Harald

    2010-06-01

    Full Text Available Abstract Background The endogenous circadian clock allows the organism to synchronize processes both to daily and seasonal changes. In plants, many metabolic processes such as photosynthesis, as well as photoperiodic responses, are under the control of a circadian clock. Comparative studies with the moss Physcomitrella patens provide the opportunity to study many aspects of land plant evolution. Here we present a comparative overview of clock-associated components and the circadian network in the moss P. patens. Results The moss P. patens has a set of conserved circadian core components that share genetic relationship and gene expression patterns with clock genes of vascular plants. These genes include Myb-like transcription factors PpCCA1a and PpCCA1b, pseudo-response regulators PpPRR1-4, and regulatory elements PpELF3, PpLUX and possibly PpELF4. However, the moss lacks homologs of AtTOC1, AtGI and the AtZTL-family of genes, which can be found in all vascular plants studied here. These three genes constitute essential components of two of the three integrated feed-back loops in the current model of the Arabidopsis circadian clock mechanism. Consequently, our results suggest instead a single loop circadian clock in the moss. Possibly as a result of this, temperature compensation of core clock gene expression appears to be decreased in P. patens. Conclusions This study is the first comparative overview of the circadian clock mechanism in a basal land plant, the moss P. patens. Our results indicate that the moss clock mechanism may represent an ancestral state in contrast to the more complex and partly duplicated structure of subsequent land plants. These findings may provide insights into the understanding of the evolution of circadian network topology.

  4. Notes on Brachytheciaceae (Bryophyta) of China%中国青藓科新资料

    Institute of Scientific and Technical Information of China (English)

    刘倩; 王幼芳; 左勤

    2010-01-01

    通过对青藓科模式标本的研究,结合中科院华南植物园标本馆(IBSC)及云南高黎贡山的青藓科标本,报道中国青藓科新记录1种:阔叶美喙藓Eurhynchium latifolium Cardot.对于曾有文献记载但缺少描述的4个种:粗肋毛尖藓Cirriphyllum crassinerum(Taylor)Loeske & M.Fleisch.、锐尖细喙藓Rhynchostegiella menadensis(Sande Lac.)E.B.Bartram、毛尖细喙藓Rhynchostegiella sakuraii Takaki和西里伯长喙藓Rhynchostegium celebicum(Sande Lac.)A.Jaeger,在经过模式标本的检阅后重新确定了其在中国的分布,并提供了详细的描述及图片.

  5. Dilutineuron, a new moss genus of the subfamily Racomitrioideae (Grimmiaceae, Bryophyta

    Directory of Open Access Journals (Sweden)

    Bednarek-Ochyra Halina

    2015-10-01

    Full Text Available Based on available molecular and morphological evidence, the genus Codriophorus P.Beauv. (Grimmiaceae subfam. Racomitrioideae proved to be a polyphyletic taxon. It consists of two distinct genera which correspond to two sections of Codriophorus, namely sect. Codriophorus and sect. Fascicularia (Bednarek-Ochyra Bednarek-Ochyra & Ochyra. The latter section is raised to generic rank as Dilutineuron Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek. The new genus consists of the following five species: D. fasciculare (Hedw. Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. brevisetum (Lindb. Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. anomodontoides (Cardot Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov., D. corrugatum (Bednarek-Ochyra Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov. and D. laevigatum (Mitt. Bednarek-Ochyra, Sawicki, Ochyra, Szczecińska & Plášek, comb. nov.

  6. Biomonitoring of air pollution using antioxidative enzyme system in two genera of family Pottiaceae (Bryophyta).

    Science.gov (United States)

    Bansal, Pooja; Verma, Sonam; Srivastava, Alka

    2016-09-01

    Bryophyte particularly mosses, have been found to serve as reliable indicators of air pollution and can serve as bryometers-biological instruments for measuring air pollution. They are remarkable colonizers, as they have the ability to survive in adverse environments and are also particular in their requirement of environmental conditions, which makes them appropriate ecological indicators. The purpose of this study was to evaluate the activity of antioxidative enzymes in two mosses viz., Hyophila rosea R.S. Williams and Semibarbula orientalis (Web.) Wijk. & Marg. and assess their suitability as biomonitors. Three different locations viz., Lucknow University, Residency (contaminated sites) and Dilkusha Garden (reference site) within Lucknow city with different levels of air pollutants were used for comparison. Our results indicate that air pollution caused marked enhancement in activity of antioxidative enzymes viz., catalase, peroxidase and superoxide dismutase. All the three are capable of scavenging reactive oxygen species. In the genus S. orientalis, catalase, peroxidase and superoxide dismutase activity was minimum at the reference site Dilkusha Garden and was significantly higher at the two contaminated sites for catalase and peroxidase, whereas the difference was non significant for superoxide dismutase. In H. rosea the activity of catalase and peroxidase at the three locations was almost similar, however superoxide dismutase activity showed a significant increase in the two contaminated sites when compared to the reference site, the value being highest for Lucknow University site. It was thus observed that the two genera, from the same location, showed difference in the activity of the antioxidative enzymes. Based on our results, we recommend bryophytes as good monitors of air pollution. PMID:27321879

  7. New mosses records (Bryophyta for Goiás and Tocantins states, Brazil Ocorrências novas de musgos (Bryophyta para os Estados de Goiás e Tocantins, Brasil

    Directory of Open Access Journals (Sweden)

    Denilson Fernandes Peralta

    2008-09-01

    Full Text Available Sixty-five moss taxa are new records for Goiás and Tocantins States. Of these, 44 are new records (40 - Goiás; four - Tocantins and 23 are new sites in each of the states (19 -Goiás; four - Tocantins. Ptychostomum pallescens (Schleich. ex Schwägr. Spence and Philonotis fontana (Hedw. Brid. are new records for Brazil, and are illustrated.Após o estudo da coleção do herbário SP, foram encontradas 65 novas ocorrências de musgos para Goiás e Tocantins. Deste total, 44 táxons são primeiras referências (40 - Goiás e quatro - Tocantins e 23 táxons tiveram a distribuição geográfica ampliada em cada um dos estados (19 - Goiás e quatro - Tocantins. As espécies Ptychostomum pallescens (Schleich. ex Schwägr. Spence e Philonotis fontana (Hedw. Brid. são novas citações para o Brasil e apresentam ilustração.

  8. Os gêneros Lepidopilidium, Lepidopilum, Pilotrichum e Thamniopsis (Pilotrichaceae, Bryophyta no Estado do Rio de Janeiro, Brasil The genera Lepidopilidium, Lepidopilum, Pilotrichum and Thamniopsis (Pilotrichaceae, Bryophyta in Rio de Janeiro State, Brazil

    Directory of Open Access Journals (Sweden)

    Thaís de Freitas Vaz

    2006-12-01

    Full Text Available A família Pilotrichaceae está bem representada no Estado do Rio de Janeiro, onde ocorrem 11 gêneros e 35 espécies. O trabalho trata das 17 espécies dos gêneros Lepidopilidium (Müll. Hal., Lepidopilum (Brid. Brid., Pilotrichum P. Beauv. e Thamniopsis (Mitt. M. Fleisch. presentes no Estado do Rio de Janeiro. São apresentadas descrições diagnósticas, ilustrações, comentários taxonômicos, distribuição geográfica e status de conservação para cada espécie.The family Pilotrichaceae is well represented in the state of Rio de Janeiro, where 11 genera and 35 species occur. The study includes 17 species of Lepidopilidium (Müll. Hal., Lepidopilum (Brid. Brid., Pilotrichum P. Beauv. and Thamniopsis (Mitt. M. Fleisch. from Rio de Janeiro State. Diagnostic descriptions, illustrations, floristic comments, geographic distribution and conservation status are provided for each species.

  9. Os gêneros Brymela, Callicostella, Crossomitrium, Cyclodictyon, Hookeriopsis, Hypnella e Trachyxiphyum (Pilotrichaceae, Bryophyta no Estado do Rio de Janeiro, Brasil The genera Brymela, Callicostella, Crossomitrium, Cyclodictyon, Hookeriopsis, Hypnella and Trachyxiphium (Pilotrichaceae, Bryophyta in Rio de Janeiro State, Brazil

    Directory of Open Access Journals (Sweden)

    Thaís de Freitas Vaz

    2006-12-01

    Full Text Available No Estado do Rio de Janeiro a família Pilotrichaceae está representada por 35 espécies, compreendidas em 11 gêneros. O trabalho é parte dos estudos realizados com a família no Estado, tratando de 18 espécies pertencentes aos gêneros Brymela Crosby & B.H. Allen, Callicostella (Müll. Hal. Mitt., Crossomitrium Müll. Hal., Cyclodictyon Mitt., Hookeriopsis (Besch. A. Jaeger, Hypnella (Müll. Hal. A. Jaeger e Trachyxiphium W.R. Buck. São apresentados para cada espécie descrições diagnósticas, ilustrações, comentários, distribuição geográfica e o status de conservação.Pilotrichaceae is represented in Rio de Janeiro State by 35 species and 11 genera. This work is part of a larger study on the family in the state, and presents a taxonomic treatment of 18 species in the genera Brymela Crosby & B.H. Allen, Callicostella (Müll. Hal. Mitt., Crossomitrium Müll. Hal., Cyclodictyon Mitt., Hookeriopsis (Besch. A. Jaeger, Hypnella (Müll. Hal. A. Jaeger and Trachyxiphium W.R. Buck. Descriptions, illustrations, comments, distribution, and conservation status for each species are presented.

  10. 山西提灯藓科植物的研究%Mniaceae(Bryophyta) in Shanxi, North China

    Institute of Scientific and Technical Information of China (English)

    王桂花; 谢树莲; 刘晓铃; 祝晓红

    2010-01-01

    通过对苔藓植物的采集、鉴定和整理,报道山西省提灯藓科植物共4属22种,包括疣灯藓属 Trachycystis 1种,提灯藓属Mnium 10种,葡灯藓属 Plagiomnium 10种和立灯藓属 Orthomnion 1种.并简要介绍了它们的生境和分布.

  11. Notes on Orthothecium (Bryophyta)of China%中国灰石藓属研究新资料

    Institute of Scientific and Technical Information of China (English)

    马婧; 左勤; 章博远; 魏倩倩; 王幼芳

    2015-01-01

    中国灰石藓属长期缺乏系统的形态特征描述和种间区分特征研究,分类鉴定较为困难。该研究采用经典分类学方法,通过查阅灰石藓属内相关物种的原始文献,借阅该属在中国有记载的3个物种的相关模式标本,同时搜集和观察来自美国、加拿大、俄罗斯、瑞典、瑞士、挪威、尼泊尔的标本以及中国内蒙古、四川、新疆等地的地方标本,确认了该属物种在中国的分布,增加了直叶灰石藓在内蒙古和新疆以及灰石藓在四川的新分布记录,并提供了详细的形态描述和图版,编制了中国灰石藓属植物的分种检索表。这3个物种在植物大小、叶是否具褶皱、茎叶和枝叶是否同形等特征上具有区别。该文增补的分布信息及种间区分特征可为中国灰石藓属及棉藓科相关类群的鉴定工作提供依据。%The long-term lack of systematic morphological characteristic descriptions and species distinctions of Or-thothecium Bruch & Schimp in China resulted in the difficult taxonomy.For further understanding of the classifica-tion of this genus,in addition to the study of original literatures of the related Orthothecium species,morphological characters of types and general specimens were observed.The specimens examined were collected from the United States,Canada,Russia,Sweden,Switzerland,Norway,Nepal and China(Inner Mongolia,Sichuan and Xinjiang). This study confirmed this genus species distribution in China.O .intricatum (Hartm.)Schimp was newly recorded in Inner Mongolia and Xinjing,O .rufescens (Dicks.Ex Brid.)Schimp newly recorded in Sichuan.Detailed morpho-logical descriptions,illustrations and a key of three Orthothecium species were provided,promoting for the taxonomy study of Orthothecium and Plagiotheciaceae.

  12. Identification guide to Nordic aphids associated with mosses, horsetails and ferns (Bryophyta, Equisetophyta, Polypodiophyta (Insecta, Hemiptera, Aphidoidea

    Directory of Open Access Journals (Sweden)

    Anders Christian Albrecht

    2015-10-01

    Full Text Available Keys and diagnoses of North European aphids (Hemiptera, Aphidoidea associated with mosses, horsetails and ferns are given, based on fresh and freeze-dried material. Numerous externally visible and thus informative characters, that are absent in cleared, slide-mounted specimens, such as body shape colours, wax coating and pattern etc., are utilized. Most of the species are illustrated by photographs of live specimens and drawings. Root-feeding species living in the moss layer or otherwise often present in moss samples are also included, even if their hosts were spermatophytes. The combination of colour images and diagnoses, utilizing easily observed characters, allows the identification of a large number of species already in the field, and many more at home with the aid of a stereo microscope. Host plant relationships and association with ants are summarised, including new records. Brief accounts on aphid life cycles, freeze-drying preparation techniques, etc. are also given to support the use of the keys.

  13. The mosses (Bryophyta) of Capitán Prat Province, Aisén Region, southern Chile

    OpenAIRE

    Larraín, Juan

    2016-01-01

    The bryophytes of Capitán Prat province have remained one of the least explored in Chile. The eventual construction of several dams on the rivers Baker and Pascua required prospection of all groups of organisms including bryophytes, work that was facilitated by the recent construction of vehicular roads that now offer easy access to previously almost unaccessible locations. The results of intense bryophyte collecting during the austral summer of 2007 are here presented. A total of 260 moss ta...

  14. The complete mitochondrial genome of the moss Oxystegus tenuirostris (Hook. & Taylor) A.J.E. Sm. (Pottiaceae, Bryophyta).

    Science.gov (United States)

    Alonso, Marta; Medina, Rafael; Cano, María Jesús; Jiménez, Juan Antonio; Goffinet, Bernard

    2016-09-01

    The mitochondrial genome of mosses is characterized by a highly conserved structure and genic content. This is confirmed here through the assembly and annotation of the mt genome of the moss Oxystegus tenuirostris, family Pottiaceae, for which it is assembled. A phylogenetic tree is inferred from the whole genome of 16 species of mosses to validate the sequence of O. tenuirostris by confirming its shared ancestry with Syntrichia. The genome is 105 001 bp long, with a GC content of 39.2%, comprising 40 protein coding, 24 tRNA, and 3 rRNA genes. All introns reported from the mt genome of all but one peristomate moss are present, whereas no region of 50 bp or more is repeated within the genome. The genic content and order is identical to that of most mosses, highlighting that the mt genome is static not only across the phylogenetic depth but also breadth of the moss tree of life. PMID:26370465

  15. Morphological Characteristics and Geographical Distribution of Mielichhoferia mielichhoferiana (Bryaceae, Bryophyta)%缺齿藓(真藓科)的形态特征和地理新分布

    Institute of Scientific and Technical Information of China (English)

    张红霞; 白学良; 萨如拉

    2014-01-01

    通过对内蒙古自治区与宁夏回族自治区交界处——贺兰山苔藓植物的调查采集和室内鉴定,发现了缺齿藓(Mielichhoferia mielichhoferiana)的一个新的地理分布记录.该文讨论了缺齿藓的形态特征和地理分布,将其与喜马拉雅缺齿藓、日本缺齿藓和中华缺齿藓进行了比较分析,并提供了该种的图版和中国缺齿藓属的分种检索表.该种的发现不仅丰富了中国缺齿藓属的研究资料,同时也说明了贺兰山的植物区系成分与喜马拉雅成分具有一定的关联.

  16. Use of bryophyta for air pollution monitoring: state of research in Italy; L'utilizzo delle briofite nel monitoraggio ambientale: stato della ricerra in Italia

    Energy Technology Data Exchange (ETDEWEB)

    Cenci, R.M.; Aleffi, M. [European Commission, Ispra (Italy). Centro Comune di Ricerca di Ispra Instituto dell' Ambiente, Unit Suolo e Rifiuti

    2001-07-01

    The moss Hypnum cupressiforme was collected in 94 sites throughout the Colline Metallifere (southern Tuscany) to evaluate environmental contamination by trace elements. As epigeic mosses trap airborne soil particles, absolute concentrations of lithophilic elements were normalised by using Al and Ti as indicators of soil contamination. High concentrations of As, B, Cr, Ni and other elements were found in several samples, mainly reflecting the geochemical nature of the region, abandoned mining and smelting activities and emissions from geothermal power plants. Possible approaches to improve the biomonitoring of trace metals with mosses were discussed.

  17. Utilization status of bryophyta in the gardern city%苔藓植物在园林城市建设中的应用现状分析

    Institute of Scientific and Technical Information of China (English)

    焦云红; 叶嘉

    2006-01-01

    苔藓植物是自然界重要组成部分,在城市绿化中具有重要功能:具有一定的观赏价值、有独特的造景功能、环境指示作用、吸水、保水功能等,但其在园林城市的建设中长期处于被忽略、甚至被排挤的边缘地位,应进一步加强对其的研究及开发利用.

  18. Morphological Characteristics and New Distribution Records of Andreaea densifolia (Bryophyta)%密叶黑藓的形态特征和新分布记录

    Institute of Scientific and Technical Information of China (English)

    张乐; 白学良; 任冬梅; 寇瑾

    2013-01-01

    对四川省黑水县达古冰川苔藓植物的调查采集和标本鉴定过程中,发现了密叶黑藓(Andreaea densi folia)的一个新的地理分布记录.该文对密叶黑藓的形态特征进行了详细记录与拍照,并对以往描述和绘图进行了比较分析,丰富了密叶黑藓的研究资料,对研究中国黑藓属植物具有重要的意义.%In the process of the investigation,collection and study of Bryophytes from the Dagu Glacier of Heishui County in Sichuan Province,discovered a new geographic distribution records of Andreaea densifolia.This paper describes its morphological characteristics and pictures is taken under the microscope.Description and drawing of the past had been corrected.Enriched our study information on Andreaea densifolia and it has an important significance on the study of diversity of moss flora of China.

  19. A Revision of Chinese Brachytheciaceae(Bryophyta)Ⅰ :Kindbergia Ochyra%中国青藓科植物分类学修订(一):异叶藓属

    Institute of Scientific and Technical Information of China (English)

    李敏; 王立宝; 赵建成; 王幼芳

    2015-01-01

    在对世界异叶藓属(Kindbergia Ochyra)植物进行系统研究基础上,作者对中国分布的该属植物进行了分类学修订.结果表明:(1)中国分布的"树状异叶藓"[K.arbuscula(Broth.) Ochyra]、"异叶藓"[K.praelonga(Hedw.) Ochyra]和密枝燕尾藓[Bryhnia serricuspis(Mull Hal.)Y.F.Wang&R.L.Hu]为K.dumosa(Mitt.) Ignatov&Huttunen的错误鉴定;(2)因树状分枝的植物体、异形的茎枝叶、近及顶的强壮中肋和明显下延的叶基等特征不同于青藓科现存任一类群,故将中国分布的"异叶藓属"植物移入新建属——拟异叶藓属(Pseudokindbergia M.Li,Y.F.Wang,Ignatov&B.C.Tan)中;(3)拟异叶藓属区别于异叶藓属的主要形态特征为:假鳞毛半圆形至三角状半圆形,先端钝或平截;孢蒴倾立至水平;蒴盖圆锥形.(4)到目前为止,中国尚未发现异时藓属植物的分布.

  20. Musgos (Bryophyta de um fragmento de Mata Atlântica na Serra da Jibóia, município de Santa Terezinha, BA, Brasil Mosses (Bryophyta from a fragment of Atlantic Forest in the Jibóia Mountains, Santa Terezinha municipality, Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    Emilia de Brito Valente

    2009-06-01

    Full Text Available O levantamento de musgos realizado em uma área de Mata Atlântica no município de Santa Terezinha, Bahia, resultou em flora rica, com 61 espécies pertencentes a 23 famílias e 46 gêneros. Sematophyllaceae (sete spp., Orthotrichaceae (seis spp., Pilotrichaceae (cinco spp., Calymperaceae (cinco spp., Leucobryaceae (cinco spp. e Meteoriaceae (quatro spp. apresentaram maior riqueza específica. Actinodontium integrifolium (Broth. Churchill e Calymperes venezuelanum (Mitt. Broth. ex Pittier constituem novos registros para o Brasil. Ectropothecium leptochaeton (Schwaegr. W.R. Buck, Eulacophyllum cultelliforme (Sull. W.R. Buck & Ireland, Fissidens santaclarensis Thér., Lepidopilidium portoricense (Müll. Hal. H.A. Crum & Steere, Mittenothamnium reptans (Hedw. Card., Orthostichella pentasticha (Brid. W.R. Buck, Pilotrichella flexilis (Hedw. Ångstr., Porotrichum mutabile Hampe e Thuidium tomentosum Schimp. são novas ocorrências para a Bahia. Houve predomínio de táxons de distribuição neotropical. A comunidade corticícola foi predominante com 70% das espécies, seguida da epíxila, com 23%. A brioflora do fragmento mostrou-se rica já que corresponde a 24% do total de briófitas atualmente conhecido no Estado.This work presents the results of an inventory of mosses carried out in an Atlantic Forest fragment in the Jibóia Mountains, Santa Terezinha, Bahia State, Brazil. A total of 61 moss species distributed in 23 families and 46 genera were found. The families Sematophyllaceae (seven spp., Orthotrichaceae (six spp., Pilotrichaceae (five spp., Calymperaceae (five spp., Leucobryaceae (five spp. and Meteoriaceae (four spp. had higher species richness. Actinodontium integrifolium (Broth. Churchill and Calymperes venezuelanum (Mitt. Pitt. are new records for Brazil. Ectropothecium leptochaeton (Schwaegr. W.R. Buck., Eulacophyllum cultelliforme (Sull. W.R. Buck & Ireland, Fissidens santa-clarensis Thér., Mittenothamnium reptans (Hedw. Card., Orthostichella pentasticha (Brid. Buck, Pilotrichella flexilis (Hedw. Ångstr., Lepidopilidium portoricense (Müll. Hal. Crum & Steere, and Thuidium tomentosum Schimp. are new records for Bahia. As regards geografic distribuition, neotropical taxa predominate, while in relation to communities, corticicolous (70% and epixilous species (23% predominate. The local flora was considered rich for including 24% of the bryophytes that occur in Bahia State.

  1. Musgos pleurocárpicos dos fragmentos de Mata Atlântica da Reserva Ecológica da Michelin, município de Igrapiúna, BA, Brasil: II - Hypnales (Bryophyta: Bryopsida Pleurocarpous mosses from Atlantic Forest fragments at the Michelin Ecological Reserve, Igrapiúna County, Bahia State Brazil: II - Hypnales (Bryophyta: Bryopsida

    Directory of Open Access Journals (Sweden)

    Silvana B. Vilas Bôas-Bastos

    2009-09-01

    Full Text Available Durante os estudos brioflorísticos realizados na Reserva Ecológica da Michelin, foram identificadas 37 espécies de Hypnales pertencentes a 10 famílias. Sematophyllaceae e Pylaisiadelphaceae contribuíram com o maior número de espécies, 10 e sete, respectivamente, seguidas de Neckeraceae com seis. Taxithelium planum (Brid. Mitt. e Sematophyllum subsimplex (Hedw. Mitt. foram as espécies com maior ocorrência na área de estudo, 78 e 54 ocorrências, respectivamente. Estão sendo apresentadas chaves de identificação para os gêneros, distribuição geográfica, espectro ecológico e comentários para as espécies.During a bryofloristic study at the Michelin Ecological Reserve, 37 species were identified belonging to 10 families. Sematophyllaceae and Pylaisiadelphaceae were the most species-rich families, 10 and seven, respectively, followed by Neckeraceae with six species. Taxithelium planum (Brid. Mitt. and Sematophyllum subsimplex (Hedw. Mitt. were common, with 78 and 54 occurrences, respectively. An identification key to the genera, geographic distribution, ecological spectrum and comments on the species are provided.

  2. Musgos (Bryophita do nordeste Paranaense, Brasil -1. Zona Bragantina, microrregião do Salgado e município de Viseu Mosses (Bryophyta of northeast Pará, Brazil -1. Zona Bragantina Salgado microregion and Viseu municipality

    Directory of Open Access Journals (Sweden)

    Rita de Cássia P. dos Santos

    2003-01-01

    Full Text Available Neste trabalho foram inventariadas as espécies de musgos que ocorrem nos diferentes tipos de vegetação dos municípios da Zona Bragantina, da Microrregião do Salgado e município de Viseu, todos localizados no Nordeste Paraense. Coletaram-se 632 amostras, que resultaram em 60 espécies e uma variedade, distribuídas em 30 gêneros e 16 famílias. Sematophyllaceae, Calymperaceae e Leucobryaceae destacaram-se em diversidade de espécies e número de ocorrências. Sematophyllum subsimplex (Hedw. Mitt. e Calymperes lonchophyllum Schwaegr. são as espécies mais abundantes. Os resultados referentes à Microrregião do Salgado são comparados aos encontrados na Zona Bragantina e município de Viseu. Ocorre maior diversidade nas matas primárias, indicando que a substituição delas por vegetação secundária resulta no empobrecimento da diversidade das espécies de musgos.This paper is an inventory of moss species occuring in diferent types of vegetation in the Zona Bragantina, Salgado microregion and Viseu municipalities, all located in the northeast of Pará. The results found 60 species and one variety in 632 moss samples, distributed in 30 genera and 16 families. Sematophyllaceae, Calymperaceae e Leucobryaceae were prominent in diversity of species and number of occurrencies. Sematophyllum subsimplex (Hedw. Mitt. and Calymperes lonchophyllum Schwaegr. are the most abundant species. The results found at Salgado Microregion were compared to the results found at Zona Bragantina and Viseu municipalities. There is a higher diversity in primary vegetation, indicating that the replacement by the secondary vegetation results in the impoverishment of moss species diversity.

  3. 新疆阿尔泰山曲尾藓科2个中国新记录种%Two New Records of Dicranaceae (Bryophyta) to China from Altai Mountains, Xinjiang

    Institute of Scientific and Technical Information of China (English)

    买买提明·苏来曼; 艾尼瓦尔·阿布都热衣木; 李微; 吴鹏程

    2012-01-01

    阿尔泰山是欧亚大陆最为宏伟的山脉之一,其中段的西南坡坐落于中国新疆境内、众多具温带性质的藓类植物分布于此.作者在对阿尔泰山进行苔藓植物区系调查过程中,发现了分布于阿尔泰山的喀纳斯自然保护区及布尔津县禾木乡的2个藓类植物中国新记录种——隶属曲尾藓科的短叶曲尾藓[ Dicranum brevifolium (Lindb.)Lindb.]和卷叶小曲尾藓[Dicranella crispa (Hedw.) Schimp.].由地理分布可知,短叶曲尾藓和卷叶小曲尾藓在中国皆为稀有种类.%Altai Mountains are one of the largest mountain ranges in the Eurasian Continent.The southwest slope of middle Altai Mrs.is located in Xinjiang of China,where a lot of temperate element mosses are distributed.During our recent investigation in Altai Mts,we found two new records of Dicranaceae to China-Dicranum brevifolium (Lindb.) Lindb.and Dicranella crispa (Hedw.) Schimp.Both of them were collected in Kanas Nature Reserve and Hemu Kanas Village of Burqin County of the Altai Mrs.Geographically,they are only limited in a very small region in China.

  4. Studies on the bryophyta plants resoucess in Hubei province--Ⅱ The bryophytes flora of Wuhan city%湖北省苔藓植物资源研究--Ⅱ武汉市苔藓植物区系

    Institute of Scientific and Technical Information of China (English)

    刘双喜; 彭丹; 秦伟; 余小菁; 潘小玉; 刘胜祥

    2001-01-01

    通过对武汉市区的400余号苔藓植物标本的鉴定,得知武汉市区苔藓植物共有28科、53属、113种(包括3变种,4个中国特有种).其中藓类植物22科、45属、106种,苔类植物种类少,共6科、6属、7种. 占优势的有8个科,分别为丛藓科Pottiaceae,曲尾藓科Dicranaceae,羽藓科Thuidiaceae,青藓科Brachytheciaceae,金发藓科Polytrichaceae,凤尾藓科Fissidentaceae,真藓科Bryaceae,绢藓科 Entodontaceae.武汉市苔藓植物的区系属于泛北极植物区,中国-日本亚区,具有从亚热带向暖温带过渡的特征.

  5. Sciuro-hypnum ornellanum (Molendo) Ignatov & Huttunen (Brachytheciaceaae,Bryophyta) Reported New to China%青藓科中国新记录种——短尖拟青藓

    Institute of Scientific and Technical Information of China (English)

    李敏; 魏倩倩; 李晓芹; 买买提明·苏来曼; 王幼芳

    2013-01-01

    该文报道了短尖拟青藓[Sciuro-hypnum ornellanum (Molendo) Ignatov & Huttunen]在新疆阿尔泰山的分布,这是该种在中国的首次记录.详细介绍了拟青藓属[Sciuro-hypnum (Hampe) Hampe]的由来,讨论了短尖拟青藓的形态特征及其地理分布,对其与形态相近种进行了比较分析,并提供了中国拟青藓属分种检索表.该种的发现不仅为中国青藓科植物研究提供了新资料,同时也进一步佐证了中国新疆植物区系与俄罗斯、中亚及欧洲的密切联系.

  6. 云台山苔藓植物的生活型及其景观价值%The Life-forms of Bryophyta and Its Value of Landscape at Mt. Yuntai

    Institute of Scientific and Technical Information of China (English)

    王育水; 刘永英; 张为民

    2009-01-01

    云台山生长着203种苔藓植物,根据群集方式及其生长型特征定义,将云台山分布的苔藓植物的生活型划分为4种类型,分别是丛集型、交织型、垫状型和漂浮型,结合云台山的地质景观、水体景观,探讨了不同生活型苔藓植物产生的生态景观价值.

  7. 基于SOD和EST同工酶的19种苔藓植物种间关系排序分析%ORDINATION ANALYSES OF 19 SPECIES OF BRYOPHYTA BASED ON SOD AND EST ISOZYMES

    Institute of Scientific and Technical Information of China (English)

    邵邻相; 郭水良; 陈吉娟

    2001-01-01

    采用聚丙烯酰胺凝胶电泳的方法,获得了金华北山苔藓植物19个种之间酯酶(EST)、超氧化物歧化酶(SOD)的同工酶酶谱.将19个种苔藓植物的酶谱进行量化后,采用主成分分析(PCA)方法,比较了19个种种间关系的差异特点.研究表明,苔藓植物具有很高的遗传多样性,以同工酶酶谱资料为基础,应用主成分分析方法能够比较直观和有效地反映出苔藓植物分类群间的系统关系.

  8. 毛锦藓科中国新记录种——卷边麻锦藓%Taxithelium kerianum (Broth.) Broth.(Pylaisiadelphaceae, Bryophyta)Reported New to China

    Institute of Scientific and Technical Information of China (English)

    章博远; 魏倩倩; 韦玉梅; 贾渝; 朱瑞良; 王幼芳

    2015-01-01

    报道了产自广西的毛锦藓科1中国新记录种——卷边麻锦藓[Taxithelium kerianum (Broth.)Broth.],提供了该种详细的形态描述和图版,并编制了麻锦藓属的分种检索表,明确了卷边麻锦藓与中国分布的麻锦藓属其它种类之间的形态差别.该种主要分布在南亚及其附近地区,为典型的热带藓类.

  9. 藓类植物脱水耐性与生理生态适应性的研究进展%Desiccation Tolerance of Bryophyta and Its Ecological Adaptation

    Institute of Scientific and Technical Information of China (English)

    杜晓濛; 田向荣; 李菁; 曹丹; 胡荣; 魏玉晶

    2013-01-01

    干旱胁迫下,藓类植物表现出一系列生理生态适应性变化.重点阐述藓类植物在干旱胁迫下的生理代谢指标,综述了藓类植物的脱水耐性和生态适应性的关系.分析表明,藓类植物耐脱水生理生态适应性受多方面调节和控制,对藓类植物脱水耐性的研究要从多方面综合考虑.

  10. Morphological Characters and New Geographical Distribution of Pohlia lutescens (Bryophyta,Mielichhoferiaceae)in China%念珠丝瓜藓(缺齿藓科)形态特征及其在中国的新分布

    Institute of Scientific and Technical Information of China (English)

    王晓蕊; 李琳; 李敏; 赵建成

    2016-01-01

    Based on the systematically taxonomic study of the genus Pohlia Hedw.in China,this paper re-vises a species of the genus with toruloid gemmae growing on the rhizoids,Pohlia lutescens.Morphologi-cal characters,geographical distribution and habitat of this species were discussed.The comparison among P.lutescens and its related species,P.cruda,P.hyaloperistoma and P.nutans,were also conducted. The result of identification of specimens shows that the distribution range in China of P.lutescens is ex-panded from five to ten provinces.Meanwhile,the distribution map of the species in China is provided.%通过对中国产丝瓜藓属Pohlia(缺齿藓科 Mielichhoferiaceae)植物系统地分类学研究,对本属一具有假根生念珠状排列的芽胞的种———念珠丝瓜藓的形态解剖学特征和地理分布进行了修订,并讨论了念珠丝瓜藓的生境,以及与其相近种泛生丝瓜藓、明齿丝瓜藓和黄丝瓜藓等进行了比较分析。根据标本信息,确定念珠丝瓜藓在中国的分布由原来的5省区扩大到10省区,并绘制了该种在中国的分布图。

  11. Ultrastructural changes and Heat Shock Proteins 70 induced by atmospheric pollution are similar to the effects observed under in vitro heavy metals stress in Conocephalum conicum (Marchantiales – Bryophyta)

    International Nuclear Information System (INIS)

    Changes in ultrastructure and induction of Heat Shock Proteins 70 have been studied in Conocephalum conicum (Marchantiales) collected in different urban and country sites in Italy. These results were compared to the effects in vitro of exposition to different heavy metals for several days. At urban sites, cellular ultrastructure was modified, and heavy metals could be observed accumulating in cell walls. Simultaneously, a strong increment in Hsp70 was detected, compared with results observed on control specimens. When C. conicum was exposed to heavy metals in vitro, comparable effects as in polluted sites were observed: Cd and Pb accumulated mostly within parenchyma and, within cells, were absorbed to cell walls or concentrated in vacuoles. Moreover, severe alterations were observed in organelles. Concomitantly, a progressive accumulation of Hsp70 was detected following heavy metals exposition. These effects are discussed in order to describe the dose and time-dependent response to heavy metal stress in C. conicum. -- Highlights: •Pollution induces ultrastructural changes and Hsp70 induction in C. conicum. •These changes can be mimicked by in vitro exposition to heavy metals. •The heavy metal induced changes, which are potential causes of toxitolerance. •C. conicum is a heavy metals tolerant liverwort that could be used as bioindicator. -- Pollution induces ultrastructural changes and Hsp70 induction in C. conicum, that can be mimicked in vitro. This liverworth could be used as bioindicator

  12. 河北省芦荟藓属和盐土藓属植物初步研究%Preliminarily Study on Aloina Kindb.and Pterygoneurum Jur.(Pottiaceae, Bryophyta) in Hebei Province, China

    Institute of Scientific and Technical Information of China (English)

    王晓蕊; 黄士良; 李敏; 赵建成

    2014-01-01

    报道了河北省丛藓科典型旱生藓类芦荟藓属(Aloina Kindb.)和盐土藓属(Pterygoneurum Jur.)植物4种,其中盐土藓属为河北新记录属,盐土藓[Pterygoneurum subsessile (Brid.) Jur.]和刺叶芦荟藓(Aloina corni folia Delgad.)为河北新记录种.讨论了各种的主要识别特征、生境和地理分布特点,绘制了形态结构图,并编写了河北省丛藓科芦荟藓属的分种检索表.

  13. 世界砂藓属植物地理分布格局及其系统演化意义%Geographical Distribution Pattern of Racomitrium (Grimmiaceae, Bryophyta)in the World and Its Evolutionary Significance

    Institute of Scientific and Technical Information of China (English)

    徐明; 于晶; 郭水良; 曹同

    2013-01-01

    Based on the distribution data of 84 species of the genus Racomitrium in 20 geographical unites (suggested by "Index Muscorum") in the world,Detrended Correspondence Analysis (DCA) and 3-Dimensional scatter plots were applied to study the distribution pattern of the genus.The results showed that 20 geographical units in relation to the distribution of Racomitrium in the world could be divided into north hemisphere region and south hemisphere region.The north hemisphere region (mainly from Laurasia) includes Am.1,Eur.,As.1,As.2,As.3,As.5,Afr.1 and Oc.,while the south region (mainly from Gondwana) includes Am.2,Am.3,Am.4,Am.5,Am.6,Afr.2,Afr.3,Afr.4,Austr.1,Austr.2,As.4,Ant..The floristic characteristics of the two regions were also analyzed.The results show that the flora of the genus Racomitrium between North and South Hemispheres are obviously different.The groups of Niphotrichum and Codriophorus with lamina papillae mainly distributed in the North Hemisphere,and the taxa of the genus without lamina papillae widely distributed on both the hemispheres.Based on the distribution patterns of the genus Ptychomitrium in the world,the origination of the genus was also speculated,and it is possible that the genus Racomitrium originated before the division of the Pangaea,and the ancestors of Racomitrium are those without laminal papilliae.%以“Index Muscorum”中的20个藓类植物地理分布单位为分析区域,基于标本信息和相关文献,统计了世界砂藓属84种植物在20个地理单位的分布数据,应用除趋势对应分析法和三维空间图直观地展示了世界砂藓属植物的地理分布格局.发现世界砂藓属植物分布明显地分为南半球区和北半球区,并与岗瓦纳古陆和劳亚古陆有较好的对应性.南半球区包括Am.2,Am.3,Am.4,Am.5,Am.6,Afr.2,Afr.3,Afr.4,Austr.1,Austr.2,As.4和Ant.等12个地理单位;北半球区包括Am.1,Eur.,As.1,As.2,As.3,As.5,Afr.1和Oc.等8个地理单位.砂藓属中的无瘤类群在南、北半球分布广泛,而叶片细胞壁具瘤的Niphotrichu和Codriophorus 亚属的种类主要分布在北半球.推测砂藓属植物的起源应早于联合古陆分裂以前,其祖先类群的叶片细胞表面光滑无瘤.

  14. 湖北省苔藓植物资源研究--VⅡ武汉市马鞍山森林公园马尾松林苔藓植物群落的研究%Studies on the Bryophyta Resource in Hubei Province--VⅡ:A Study on Bryophyta Communities in Pinus Massoniana Forest in Ma'an Mountain Forest Park of Wuhan City

    Institute of Scientific and Technical Information of China (English)

    吴展波; 李俊; 刘胜祥

    2003-01-01

    本文报道了武汉市马鞍山森林公园马尾松林中苔藓植物群落研究结果.马尾松林中苔藓植物共有17科23属34种(含变种).其中:藓类植物16科22属33种(含变种),苔类植物1科1属1种;根据苔藓植物群落生境不同将马尾松林中的苔藓群落分为树基部生群落、林地土生群落、杂草伴生群落、林地石生群落等4种生态类型.

  15. A study on the bryophyta plants resources in Hubei, China --V A preliminary list of the mosses of Triangle Hill in Xishui County, Hubei Province, China%湖北省苔藓植物资源研究--V 湖北省三角山苔藓植物名录

    Institute of Scientific and Technical Information of China (English)

    赵文浪; 刘胜祥; 黄娟; 喻融; 郑飞翔; 李俊莉

    2002-01-01

    More than 300 specimens of bryophytes were collected from Triangle Hill in Xishui County, Hubei Province. The preliminary study shows that there are 137 species(including 1 subspecies and 2 varieties)in the area, belonging to 34 families and 82 genera.%湖北三角山位于长江中游北岸,是大别山系的一部分,属于副亚热带大陆季风湿润气候.通过对三角山三百余份标本的初步鉴定,三角山共有苔藓植物137种(含2变种1亚种),隶属于34科82属,其中苔类植物12科16属23种,藓类植物22科66属114种.

  16. 世界蓑藓属(Macromitrium,Bryophyta)植物分类修订与系统发育研究:历史、现状和问题%Taxonomic Revision and Phylogenetics on the Genus Macromitrium in the World:History, Current Status and Problems

    Institute of Scientific and Technical Information of China (English)

    李丹丹; 于晶; 郭水良; 何思

    2013-01-01

    蓑藓属(Macromitrium Brid.)是藓类植物中分类最困难的类群之一.先后该属记录946个种,现接受351个种.目前中美洲、亚洲、澳大利亚、新西兰等地区的蓑藓属植物基本完成了分类修订,而南美洲、非洲中部、马达加斯加等地区的蓑藓属植物尚未进行系统的分类修订.蓑藓属的属下分类系统问题众多,先后在该属下建立了10个亚属、20个组和2个亚组,目前接受的有4个亚属和8个组,但是这些类群之间的分类地位和关系仍然不清.鉴于蓑藓属种数多,种间分类问题多,分布广泛,需要开展国际间的合作才能够解决世界蓑藓属的分类修订和系统学研究.

  17. 湖北省苔藓植物资源研究--Ⅳ浠水三角山地区苔藓植物区系研究%Studies on the Bryophyta Plants Resources in Hubei Province——Ⅳ The Bryophytes Flora of Triangle Hill in Xishui County

    Institute of Scientific and Technical Information of China (English)

    黄娟; 刘胜祥; 喻融; 叶雯; 阙延福; 李烈俊

    2003-01-01

    通过对湖北浠水三角山300余份标本的初步鉴定,三角山共有苔藓植物137种(含2变种和1亚种),隶属于34科82属,其区系成分以东亚、北温带和世界广布成分为主,分别占该地区总种数的25.6%、24.8%和18.2%.分析了该地区苔藓植物的区系特征,并阐述了三角山与国内其它6个山体苔藓植物的亲缘关系.

  18. Study on Germination Characteristics of Perilla frutescens under Simulation Environment of Acid Rain and Bryophyta%模拟酸雨及苔藓植物化感条件下紫苏种子萌发特性的研究

    Institute of Scientific and Technical Information of China (English)

    谢天; 江安娜; 王曼君; 颜凤; 方元平; 项俊

    2012-01-01

    通过模拟酸雨胁迫及苔藓化感作用两种不同的生长环境,初步探讨了模拟酸雨及3种苔藓凤尾藓(Fissidens bryoides)、提灯藓(Mnium hornum)、缩叶藓(Ptychomitrium)种植水对紫苏(Perilla frutescens)种子萌发特性的影响.结果表明,pH为5.0及以上的低浓度模拟酸雨环境对紫苏种子的萌发及幼苗生长影响不大,但随着酸化程度的加深,对紫苏种子萌发的抑制作用明显增加,当pH降到1.0时种子不发芽.紫苏幼苗叶片POD活力随胁迫时间的延长呈先升后降的趋势.而叶片MDA含量除pH为5.0处理组与对照组相近外,其他胁迫浓度下均有显著增加,说明pH低于5.0紫苏幼苗生长受到较严重损害.在苔藓种植水培养环境中,与对照组相比,紫苏种子发芽率、发芽指数、活力指数均随苔藓植物种植水浓度的升高而升高,在浓度为100%时对种子萌发的促进效果最为显著.%By simulating two different growth environment, acid rain stress and moss allelopathy, the effects of acid rain and three bryophyte cultivate water (Fissidens bryoides ,Mnium hornum,Ptychomitrium) on Perilla frutescens seed germination was studied. The results showed that the simulated acid rain with pH lower than 5.0 had little effect on P. frutescens seed germination and seedling growth; as the increasing of acidification, there was a significant inhibition of seed germination, and the seed could not germinate under the pH lower than 1.0. The POD activity in P. frutescens blade increased firstly and then decreased as the stress time prolonged, and the MDA content was decreased when pH was lower than 5.0, suggesting that P. frutescens seedling growth was affected by pH lower than 5.0. In the culture water environment, compared to the control, P. frutescens germination rate, germination index, vigor index increased as the bryophyte planting concentration increasing, and the treatment with the most significant effect was 100% bryophyte planting solution.

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

    Directory of Open Access Journals (Sweden)

    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.

  20. Physcomitrella patens as a model for studies on plant-pathogen interactions

    OpenAIRE

    Lehtonen, Mikko

    2013-01-01

    Mosses (Bryophyta) are among the basal embryophytes, which constitute a large part of the photosynthesizing biomass and carbon storage on Earth. Albeit inhabited by a number of fungal species, little is known about how this important portion of flora maintains its health status. Vascular plants (tracheophytes) respond to micro-organisms by the production of reactive oxygen species (ROS), the activation of signaling cascades leading to altered gene expression, protein synthesis and the secreti...

  1. 光合成色素の定性分析から植物進化を考察する実践的研究

    OpenAIRE

    畦, 浩二

    2003-01-01

    In order to allow students to understand the systematics and evolution of plants, the qualitative analysis of fat-soluble photosynthetic pigments by the procedure of thin-layer chromatography was carried oout in a senior high school biology class. The materials used in the class were Oscillatoria sp. (Cyanophyta), dried “Nori” Porphyra sp. (Rhodophyta), Undaria pinnatifida (Phaeophyta), Spirogyra sp. (Chlorophyta), and Conocephalum conicum (Bryophyta). Through practical teaching, the students...

  2. 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.

  3. Natural substrata for corticioid fungi

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    Eugene O. Yurchenko

    2013-12-01

    Full Text Available The paper reviews the types of substrata inhabited by non-poroid resupinate Homobasidiomycetes in situ in global scale with both examples from literature sources and from observations on Belarus corticioid fungi biota. The groups of organic world colonized by corticioid basidiomata and vegetative mycelium are arboreous, semi-arboreous, and herbaceous vascular plants, Bryophyta, epiphytic coccoid algae, lichenized and non-lichenized fungi, and occasionally myxomycetes and invertebrates. The fungi occur on living, dying, and dead on all decay stages parts of organisms. Besides, the fungi are known on soil, humus, stones, artificial inorganic and synthetic materials and dung.

  4. Radio cobalt in French rivers; Les radiocobalts dans les fleuves francais

    Energy Technology Data Exchange (ETDEWEB)

    Lambrechts, A.; Baudin-Jaulent, Y. [CEA Centre d`Etudes de Fontenay-aux-Roses, 92 (France). Inst. de Protection et de Surete Nucleaire; Baudin, J.P. [Centre National de la Recherche Scientifique (CNRS), 75 - Paris (France)

    1996-07-01

    The isotopes 58 and 60 of cobalt present in liquid wastes from nuclear plants or from fuel reprocessing plant of Marcoule are fixed in the different compartments of French rivers. The activity levels of radio-cobalt vary according to the sampled compartments nature (bryophyta > immersed plants > sediment > fish). Elsewhere, laboratory experimentations show that the contamination of fish occurs essentially from the water way rather than from food. Cobalt is mainly fixed by kidneys; muscles is no more than 30 % of the total fish activity. (author). 20 refs.

  5. Micro-Eukaryotic Diversity in Hypolithons from Miers Valley, Antarctica

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    Don A. Cowan

    2013-02-01

    Full Text Available The discovery of extensive and complex hypolithic communities in both cold and hot deserts has raised many questions regarding their ecology, biodiversity and relevance in terms of regional productivity. However, most hypolithic research has focused on the bacterial elements of the community. This study represents the first investigation of micro-eukaryotic communities in all three hypolith types. Here we show that Antarctic hypoliths support extensive populations of novel uncharacterized bryophyta, fungi and protists and suggest that well known producer-decomposer-predator interactions may create the necessary conditions for hypolithic productivity in Antarctic deserts.

  6. LAMPENFLORA OF NOVOAFONSKAYA CAVE

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    Mazina S. E.

    2015-11-01

    Full Text Available Novoafonskaya cave is located in Abkhazia. It is equipped for visits in 1975. The cave has permanently installed lighting. In caves with artificial lighting, a vegetation of cyanobacteria and algae, bryophytes and ferns can be found around lamps. The development of lampenflora is a typical problem for cave management. We have identified 69 species of phototrophs in Novoafonskaya cave: Magnoliophyta 2 species, Pteridophyta 6 species, Bryophyta 11 species, Cyanobacteria 34 species, Bacillariophyta 9 species, Ochrophyta 2 species, Chlorophyta 5 species. The article considers main habitat of lampenflora and gives their characteristics. We have also revealed predominance of cyanobacteria in the cave

  7. Briófitas do parque nacional de sete quedas, Guaíra, PR, Brasil Bryophytes from the National Park of Sete Quedas, Guaíra, Paraná, Brazil

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    Olga Yano

    2000-08-01

    Full Text Available Foram encontradas no Parque 65 espécies de briófitas, sendo 24 (14 novas para o Estado de Hepatophyta, distribuídas em seis famílias e 14 gêneros, 41 espécies (sendo 12 novas para o Estado de Bryophyta em 23 famílias e 30 gêneros e Erytrophyllastrum andinum (Sull. Zand, nova para o Brasil. As famílias que apresentaram maior número de espécies foram Lejeuneaceae com 15 e Fissidentaceae com cinco, Meteoríaceae, Frullaniaceae e Bryaceae com quatro. São apresentados descrições e comentários para todas as espécies e ilustrações para algumas.Sixty-five species of bryophytes were found in the National Park of "Sete Quedas", Guaíra, Paraná, Brazil: Hepatophyta with 24 species (with 14 species new to State arranged in six families and 14 genera; Bryophyta with 41 species (with 12 new to the State arranged in 23 families and 30 genera, being Erythrophyllastrum andinum (Sull. Zand, new for Brazil. The families most represented are Lejeuneaceae with 15 species, Fissidentaceae with five, Meteoriaceae, Frullaniaceae and Bryaceae with four each. Description and comments for each species and illustrations for some species are presented.

  8. Adições à flora de briófitas de Mato Grosso do Sul, Brasil Additions to the flora of bryophytes from Mato Grosso do Sul State, Brazil

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    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.

  9. Plants Biodiversity of Jobolarangan Forest Mount Lawu: 1. Cryptogamae

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    SUGIYARTO

    2001-01-01

    Full Text Available The objectives of the research were to make: (1 a list of Cryptogamic plants at Jobolarangan forest in mount Lawu, and (2 the actual condition of biodiversity conservation of the plants. All Cryptogamic plants on the forest were studied. The procedures of data collection were including species collection in the field, make up herbaria, observation of flora vegetation using transect method, morphology observation in the laboratory, and interview to residents and government administrations. The results showed that in the forest were found 77 species Cryptogamic plants, consisting of 27 species of fungi, 5 species of lichens, 20 species of Bryophyta and 25 species of Pterydophyta. Government and residents had successfully conserved the forest; however fire and illegal logging damaged another part.

  10. 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.

  11. The leaves of green plants as well as a cyanobacterium, a red alga, and fungi contain insulin-like antigens

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    L.B. Silva

    2002-03-01

    Full Text Available We report the detection of insulin-like antigens in a large range of species utilizing a modified ELISA plate assay and Western blotting. We tested the leaves or aerial parts of species of Rhodophyta (red alga, Bryophyta (mosses, Psilophyta (whisk ferns, Lycopodophyta (club mosses, Sphenopsida (horsetails, gymnosperms, and angiosperms, including monocots and dicots. We also studied species of fungi and a cyanobacterium, Spirulina maxima. The wide distribution of insulin-like antigens, which in some cases present the same electrophoretic mobility as bovine insulin, together with results recently published by us on the amino acid sequence of an insulin isolated from the seed coat of jack bean (Canavalia ensiformis and from the developing fruits of cowpea (Vigna unguiculata, suggests that pathways depending on this hormone have been conserved through evolution.

  12. Clasificación Moderna de las Plantas

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    Gutiérrez V. Gabriel

    1963-06-01

    Full Text Available En la mayoría de los textos de botánica se acostumbra agrupar las plantas en cuatro grandes grupos, a los cuales se les designa nomenclaturamente con el nombre de divisiones: 1-División Thallophyta. 2-División Bryophyta. 3-División Pteridophyta. 4-División Spermatophyta. A medida que ha ido progresando el estudio de dichos grupos, usando para ello todas las ramas en las cuales se ha dividido la ciencia botánica, se ha llegado a la conclusión de que dicha clasificación es muy artificial, razón por la cual, si se quiere tener un sistema filogenético, es necesario cambiarla por completo.

  13. Toward a better knowledge of the molecular evolution of phosphoenolpyruvate carboxylase by comparison of partial cDNA sequences.

    Science.gov (United States)

    Gehrig, H H; Heute, V; Kluge, M

    1998-01-01

    To get deeper insight into the evolution of phosphoenolpyruvate carboxylase we have identified PEPC fragments (about 1,100 bp) of another 12 plants species not yet investigated in this context. The selected plants include one Chlorophyta, two Bryophyta, four Pteridophyta, and five Spermatophyta species. The obtained phylogenetic trees on PEPC isoforms are the most complete ones up to now available. Independent of their manner of construction, the resulting dendrograms are very similar and fully consistent with the main topology as it is postulated for the evolution of the higher terrestrial plants. We found a distinct clustering of the PEPC sequences of the prokaryotes, the algae, and the spermatophytes. PEPC isoforms of the archegoniates are located in the phylogenetic trees between the algae and spermatophytes. Our results strengthen the view that the PEPC is a very useful molecular marker with which to visualize phylogenetic trends both on the metabolic and organismic levels.

  14. PLMItRNA, a database for tRNAs and tRNA genes in plant mitochondria: enlargement and updating

    Science.gov (United States)

    Volpetti, Vito; Gallerani, Raffaele; De Benedetto, Caterina; Liuni, Sabino; Licciulli, Flavio; Ceci, Luigi R.

    2000-01-01

    The current version of PLMItRNA has been realized to constitute a database for tRNA molecules and genes identified in the mitochondria of all green plants (Viridiplantae). It is the enlargement of a previous database originally restricted to seed plants [Ceci,L.R., Volpicella,M., Liuni,S., Volpetti,V., Licciulli,F. and Gallerani,R. (1999) Nucleic Acids Res., 27, 156–157]. PLMItRNA reports information and multialignments on 254 genes and 16 tRNA molecules detected in 25 higher plants (one bryophyta and 24 vascular plants) and seven green algae. PLMItRNA is accessible via the WWW at http://bio-WWW.ba.cnr.it:8000/srs6/ PMID:10592210

  15. Einangrun annars stigs efna úr lækjableðlu (Jungermannia exsertifolia)

    OpenAIRE

    Ólöf Huld Helgadóttir 1974

    2009-01-01

    Soppmosar (Hepaticae) tilheyra mosafylkingunni Bryophyta og hafa fundist yfir sex þúsund tegundir soppmosa um allan heim. Þeir eru frumstæðastir allra landplantna þar sem bæði laufin og þölin eru aðeins eitt eða örfá frumulög að þykkt en innihalda flókna samsetningu af annars stigs efnasamböndum. Markmið þessa verkefnis var að úrhluta, einangra og byggingargreina annars stigs efnasambönd úr soppmosanum lækjableðlu (Jungermannia exsertifolia) í þeim tilgangi að öðlast meiri þ...

  16. Conserved Organisation of 45S rDNA Sites and rDNA Gene Copy Number among Major Clades of Early Land Plants.

    Science.gov (United States)

    Rosato, Marcela; Kovařík, Aleš; Garilleti, Ricardo; Rosselló, Josep A

    2016-01-01

    Genes encoding ribosomal RNA (rDNA) are universal key constituents of eukaryotic genomes, and the nuclear genome harbours hundreds to several thousand copies of each species. Knowledge about the number of rDNA loci and gene copy number provides information for comparative studies of organismal and molecular evolution at various phylogenetic levels. With the exception of seed plants, the range of 45S rDNA locus (encoding 18S, 5.8S and 26S rRNA) and gene copy number variation within key evolutionary plant groups is largely unknown. This is especially true for the three earliest land plant lineages Marchantiophyta (liverworts), Bryophyta (mosses), and Anthocerotophyta (hornworts). In this work, we report the extent of rDNA variation in early land plants, assessing the number of 45S rDNA loci and gene copy number in 106 species and 25 species, respectively, of mosses, liverworts and hornworts. Unexpectedly, the results show a narrow range of ribosomal locus variation (one or two 45S rDNA loci) and gene copies not present in vascular plant lineages, where a wide spectrum is recorded. Mutation analysis of whole genomic reads showed higher (3-fold) intragenomic heterogeneity of Marchantia polymorpha (Marchantiophyta) rDNA compared to Physcomitrella patens (Bryophyta) and two angiosperms (Arabidopsis thaliana and Nicotiana tomentosifomis) suggesting the presence of rDNA pseudogenes in its genome. No association between phylogenetic position, taxonomic adscription and the number of rDNA loci and gene copy number was found. Our results suggest a likely evolutionary rDNA stasis during land colonisation and diversification across 480 myr of bryophyte evolution. We hypothesise that strong selection forces may be acting against ribosomal gene locus amplification. Despite showing a predominant haploid phase and infrequent meiosis, overall rDNA homogeneity is not severely compromised in bryophytes.

  17. Conserved Organisation of 45S rDNA Sites and rDNA Gene Copy Number among Major Clades of Early Land Plants

    Science.gov (United States)

    Rosato, Marcela; Kovařík, Aleš; Garilleti, Ricardo; Rosselló, Josep A.

    2016-01-01

    Genes encoding ribosomal RNA (rDNA) are universal key constituents of eukaryotic genomes, and the nuclear genome harbours hundreds to several thousand copies of each species. Knowledge about the number of rDNA loci and gene copy number provides information for comparative studies of organismal and molecular evolution at various phylogenetic levels. With the exception of seed plants, the range of 45S rDNA locus (encoding 18S, 5.8S and 26S rRNA) and gene copy number variation within key evolutionary plant groups is largely unknown. This is especially true for the three earliest land plant lineages Marchantiophyta (liverworts), Bryophyta (mosses), and Anthocerotophyta (hornworts). In this work, we report the extent of rDNA variation in early land plants, assessing the number of 45S rDNA loci and gene copy number in 106 species and 25 species, respectively, of mosses, liverworts and hornworts. Unexpectedly, the results show a narrow range of ribosomal locus variation (one or two 45S rDNA loci) and gene copies not present in vascular plant lineages, where a wide spectrum is recorded. Mutation analysis of whole genomic reads showed higher (3-fold) intragenomic heterogeneity of Marchantia polymorpha (Marchantiophyta) rDNA compared to Physcomitrella patens (Bryophyta) and two angiosperms (Arabidopsis thaliana and Nicotiana tomentosifomis) suggesting the presence of rDNA pseudogenes in its genome. No association between phylogenetic position, taxonomic adscription and the number of rDNA loci and gene copy number was found. Our results suggest a likely evolutionary rDNA stasis during land colonisation and diversification across 480 myr of bryophyte evolution. We hypothesise that strong selection forces may be acting against ribosomal gene locus amplification. Despite showing a predominant haploid phase and infrequent meiosis, overall rDNA homogeneity is not severely compromised in bryophytes. PMID:27622766

  18. Evolutionary genomics revealed interkingdom distribution of Tcn1-like chromodomain-containing Gypsy LTR retrotransposons among fungi and plants

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    Blinov Alexander

    2010-04-01

    Full Text Available Abstract Background Chromodomain-containing Gypsy LTR retrotransposons or chromoviruses are widely distributed among eukaryotes and have been found in plants, fungi and vertebrates. The previous comprehensive survey of chromoviruses from mosses (Bryophyta suggested that genomes of non-seed plants contain the clade which is closely related to the retrotransposons from fungi. The origin, distribution and evolutionary history of this clade remained unclear mainly due to the absence of information concerning the diversity and distribution of LTR retrotransposons in other groups of non-seed plants as well as in fungal genomes. Results In present study we preformed in silico analysis of chromodomain-containing LTR retrotransposons in 25 diverse fungi and a number of plant species including spikemoss Selaginella moellendorffii (Lycopodiophyta coupled with an experimental survey of chromodomain-containing Gypsy LTR retrotransposons from diverse non-seed vascular plants (lycophytes, ferns, and horsetails. Our mining of Gypsy LTR retrotransposons in genomic sequences allowed identification of numerous families which have not been described previously in fungi. Two new well-supported clades, Galahad and Mordred, as well as several other previously unknown lineages of chromodomain-containing Gypsy LTR retrotransposons were described based on the results of PCR-mediated survey of LTR retrotransposon fragments from ferns, horsetails and lycophytes. It appeared that one of the clades, namely Tcn1 clade, was present in basidiomycetes and non-seed plants including mosses (Bryophyta and lycophytes (genus Selaginella. Conclusions The interkingdom distribution is not typical for chromodomain-containing LTR retrotransposons clades which are usually very specific for a particular taxonomic group. Tcn1-like LTR retrotransposons from fungi and non-seed plants demonstrated high similarity to each other which can be explained by strong selective constraints and the

  19. Survey of the bryophytes of a gallery forest in the National Park of Serra do Cipó, Minas Gerais, Brazil

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    Ronaldo Viveiros de Sousa

    2015-03-01

    Full Text Available Serra do Cipó has attracted the interest of many researchers over the years because of its unique characteristics, particularly the fact that the site represents the transition between Cerrado and Atlantic Forest. The study area of Serra do Cipó is located along a gallery forest "córrego Três Pontinhas," at 19°16'00" S and 43°32'49" W and an altitude of 1,188 m. The objective of this study was to survey the Division Bryophyta in a gallery forest within the National Park of Serra do Cipo, Minas Gerais. Collections were made during the months of November 2009 and July 2011. We found 15 families, 26 genera, 43 species, and 4 varieties of mosses. The families with the largest number of species were Leucobryaceae (10, Sematophyllaceae (9, and Calymperaceae (6. Other families included Fissidentaceae (3, Bryaceae, Pylaisiadelphaceae, Pottiaceae, and Orthotrichaceae (2 spp. each; Brachytheciaceae, Cryphaeaceae, Fabroniaceae, Helicophyllaceae, Hypnaceae, Polytrichaceae, and Sphagnaceae had only 1 sp. each. Three new records for the state of Minas Gerais were found: Acroporium caespitosum, A. longirostre, and Colobodontium vulpinum.

  20. Shifts in methanogenic community composition and methane fluxes along the degradation of discontinuous permafrost

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    Mette Marianne Svenning

    2015-05-01

    Full Text Available The response of methanogens to thawing permafrost is an important factor for the global greenhouse gas budget. We tracked methanogenic community structure, activity, and abundance along the degradation of sub-Arctic palsa peatland permafrost. We observed the development of pronounced methane production, release, and abundance of functional (mcrA methanogenic gene numbers following the transitions from permafrost (palsa to thaw pond structures. This was associated with the establishment of a methanogenic community consisting both of hydrogenotrophic (Methanobacterium, Methanocellales and potential acetoclastic (Methanosarcina members and their activity. While peat bog development was not reflected in significant changes of mcrA copy numbers, potential methane production and rates of methane release decreased. This was primarily linked to a decline of potential acetoclastic in favour of hydrogenotrophic methanogens. Although palsa peatland succession offers similarities with typical transitions from fen to bog ecosystems, the observed dynamics in methane fluxes and methanogenic communities are primarily attributed to changes within the dominant Bryophyta and Cyperaceae taxa rather than to changes in peat moss and sedge coverage, pH and nutrient regime. Overall, the palsa peatland methanogenic community was characterized by a few dominant operational taxonomic units (OTUs. These OTUs seem to be indicative for methanogenic species that thrive in terrestrial organic rich environments. In summary, our study shows that after an initial stage of high methane emissions following permafrost thaw, methane fluxes and methanogenic communities establish that are typical for northern peat bogs.

  1. Musgos urbanos do recanto das Emas, Distrito Federal, Brasil

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    Câmara Paulo Eduardo

    2003-01-01

    Full Text Available Fruto da ocupação desordenada de Brasília, o Recanto das Emas é uma das mais recentes cidades criadas no entorno da capital. Localizada a 25,8km do Plano Piloto, conta com área de 101.476km². O Recanto das Emas foi criado em 1993 e hoje conta com população de aproximadamente 100.000 habitantes. Foram selecionados vários pontos de coleta procurando abranger toda a cidade e diferentes áreas. Foram encontrados relativamente poucos representantes da brioflórula, com predomínio de espécies ruderais. A divisão Bryophyta conta com 10 espécies e sete famílias, destacandose a família Bryaceae com três espécies. Barbula indica (Hook. Spreng. é citada pela primeira vez para a região Centro-Oeste. Os resultados explicam-se pelo pouco tempo de existência da cidade, que conta com poucos substratos para fixação das populações de briófitas e não permitiram ainda o estabelecimento de nova cobertura vegetal.

  2. Inventario Florístico del Páramo de un Frontino (Urrao-Antioquia

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    Sánchez S. Darío

    1998-12-01

    Full Text Available Ente julio de 1995 y julio de 1996 se realizaron 3 excursiones al páramo de Frontino (Urrao Antioquia, con una duración de 8 días cada una. En diferentes sitios del citado ecosistema, entre 3550-4000 m de altitud, se recolectaron 289 muestras de plantas, con 1-6 duplicados de cada una, las cuales se marcaron bajo la numeración D. Sánchez y otros. Un exsicado de cada muestra se depositó en las colecciones del herbario de la Universidad Nacional de Colombia Sede Medellín (MEDEL, los otros fueron enviados mediante donación o canje a otros herbarios como COL, JAUM y MO. La determinación de estas plantas se realizó por claves, comparación o el concurso de algunos especialistas. Dentro de los resultados de esta investigación se encontraron 239 especies pertenecientes a 170 géneros y a 80 familias que pertenecen a los siguientes grupos: Tallophyta, Bryophyta, Pteridophyta y Magnoliophyta. Mediantes el empleo de estas colecciones y otras colecciones realizadas anteriormente en el páramo, se hizo una breve descripción de cada familia y una clave para las especies respectivas.

  3. Levantamento florístico da floresta serrana da reserva biológica de Serra Negra, microrregião de Itaparica, Pernambuco, Brasil

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    Rodal Maria Jesus Nogueira

    2002-01-01

    Full Text Available O levantamento florístico, de duas áreas da Reserva Biológica de Serra Negra, localizada entre os municípios de Inajá e Floresta (8º35' - 8º38' S e 38º02' - 38º04' W, foi realizado fazendo-se 19 excursões para coleta de material botânico de Bryophyta, Pteridophyta e Magnoliophyta. No total foram coletados 319 taxa, 255 na floresta densa, situada no topo, e 117 na floresta aberta, localizada na escarpa meridional, com 12,5 % de similaridade (Jaccard. A análise de agrupamento mostrou que as duas áreas têm maiores similaridades com outras florestas serranas da região nordeste. A presença de condições abióticas diferenciadas, úmida no topo e mais seca na escarpa meridional, justifica as diferenças florísticas. Na floresta densa ocorreu um grande número de espécies com ampla distribuição nos domínios amazônico e atlântico, enquanto na floresta aberta parte das espécies foi mais relacionada à vegetação caducifólia espinhosa (caatinga, e outras têm distribuição ampla em florestas neotropicais.

  4. Genetic structure of the rare moss species Rhodobryum ontariense in Vojvodina (Serbia as inferred by isozymes

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    Sabovljević M.

    2011-01-01

    Full Text Available Rhodobryum ontariense (Kindb. Kindb. (Bryaceae, Bryophyta is a rare moss, only recently discovered in Serbia (at Deliblatska Sands. After a revision of the genus Rhodobryum in Serbia, it was concluded that all high-mountain records belong to R. roseum, while R. ontariense is confined to the one known locality at Deliblatska Sands. It is listed in the bryophyte red-list of Serbia and Montenegro. Within the single known locality we have counted 15 small sub-populations over a total surface area of 6 hectares. The species is always in sterile condition and has been recorded only on dunes exposed to the north, at the edge of shrub-grassland transition interspersed with fragments of steppe vegetation. No propagules are known. This raised the question of whether the population was once continuous, or whether vectors exist that spread detached plants or fragments to establish new subpopulations. To answer this question an isozyme analysis was performed to estimate the genetic structure of this isolated population. Based on the isozyme forms of superoxide dismutase and peroxidase at least six haplotypes were determined within the population. It can be concluded that the present patches of the moss do not derive from one subpopulation. Some kind of short-distance dispersal exists, but it remains unclear what structures act as propagules and what is the vector for them.

  5. Herbarium Areqvipense (HUSA: computerization and representativeness of its collection

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    Italo F. Treviño

    2012-11-01

    Full Text Available Scientific collections and herbaria are essential sources of information and education for researchers and practitioners in biological sciences. The Herbarium Areqvipense (HUSA, registered at Index Herbariorum since 2004, holds one of the most important collections in Peru. In this paper we provide information about the collection, and its representativeness for the Peruvian flora. HUSA has more than 11000 specimens recorded to date, with more than 2300 determined species, consisting mostly of Magnoliophyta and Pteridophyta (ca. 98%, and a smaller proportion of Basidiomycetes, Ascomycetes (fungi and lichens and Bryophyta (mosses. The collection includes specimens from 23 departments of Peru, where the samples belonging to Arequipa have the largest number of individuals collected (3375 accounting for 31% of the collection. Asteraceae and Solanaceae are the most collected with 1571 and 964 specimens, respectively. The majority of geo-referenced specimens came from the tropical wet forest with 15%, followed by the tropical pre-montane wet forest with 8%. We also provide a list of the nomenclatural types and a brief summary of the history and development of HUSA since its creation.

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

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    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.

  7. Bacterial and eukaryotic biodiversity patterns in terrestrial and aquatic habitats in the Sør Rondane Mountains, Dronning Maud Land, East Antarctica.

    Science.gov (United States)

    Obbels, Dagmar; Verleyen, Elie; Mano, Marie-José; Namsaraev, Zorigto; Sweetlove, Maxime; Tytgat, Bjorn; Fernandez-Carazo, Rafael; De Wever, Aaike; D'hondt, Sofie; Ertz, Damien; Elster, Josef; Sabbe, Koen; Willems, Anne; Wilmotte, Annick; Vyverman, Wim

    2016-06-01

    The bacterial and microeukaryotic biodiversity were studied using pyrosequencing analysis on a 454 GS FLX+ platform of partial SSU rRNA genes in terrestrial and aquatic habitats of the Sør Rondane Mountains, including soils, on mosses, endolithic communities, cryoconite holes and supraglacial and subglacial meltwater lenses. This inventory was complemented with Denaturing Gradient Gel Electrophoresis targeting Chlorophyta and Cyanobacteria. OTUs belonging to the Rotifera, Chlorophyta, Tardigrada, Ciliophora, Cercozoa, Fungi, Bryophyta, Bacillariophyta, Collembola and Nematoda were present with a relative abundance of at least 0.1% in the eukaryotic communities. Cyanobacteria, Proteobacteria, Bacteroidetes, Acidobacteria, FBP and Actinobacteria were the most abundant bacterial phyla. Multivariate analyses of the pyrosequencing data revealed a general lack of differentiation of both eukaryotes and prokaryotes according to habitat type. However, the bacterial community structure in the aquatic habitats was dominated by the filamentous cyanobacteria Leptolyngbya and appeared to be significantly different compared with those in dry soils, on mosses, and in endolithic habitats. A striking feature in all datasets was the detection of a relatively large amount of sequences new to science, which underscores the need for additional biodiversity assessments in Antarctic inland locations. PMID:26936447

  8. Downstream effects of a hydroelectric reservoir on aquatic plant assemblages.

    Science.gov (United States)

    Bernez, Ivan; Haury, Jacques; Ferreira, Maria Teresa

    2002-03-16

    Macrophytes were studied downstream of the Rophémel hydroelectric dam on the River Rance (Côtes d'Armor Department, western France) to assess the effects of hydroelectric functioning on river macrophyte communities. We studied ten representative sections of the hydro-peaking channel on five occasions in 1995 and 1996, on a 15-km stretch of river. Floristic surveys were carried out on sections 50 m in length, and genera of macroalgae, species of bryophyta, hydrophytes, and emergent rhizophytes were identified. For the aquatic bryophytes and spermatophytes section of our study, we compared our results with 19th century floristic surveys, before the dam was built. During the vegetative growth period, the hydro-peaking frequency was low. The plant richness was highest near the dam. The macrophyte communities were highly modified according to the distance to the dam. The frequency and magnitude of hydro-peaking was related to the aquatic macrophyte richness in an Intermediate Disturbance Hypothesis position. However, the results of the eco-historical comparison with 19th century floristic surveys point to the original nature of the flora found at the site. Some floral patterns, seen during both periods and at an interval of 133 years, were indicative of the ubiquity of the aquatic flora and of the plants" adaptability. This demonstrates the importance of taking river basin history into account in such biological surveys.

  9. Downstream Effects of a Hydroelectric Reservoir on Aquatic Plant Assemblages

    Directory of Open Access Journals (Sweden)

    Ivan Bernez

    2002-01-01

    Full Text Available Macrophytes were studied downstream of the Rophémel hydroelectric dam on the River Rance (Côtes d’Armor Department, western France to assess the effects of hydroelectric functioning on river macrophyte communities. We studied ten representative sections of the hydro-peaking channel on five occasions in 1995 and 1996, on a 15-km stretch of river. Floristic surveys were carried out on sections 50 m in length, and genera of macroalgae, species of bryophyta, hydrophytes, and emergent rhizophytes were identified. For the aquatic bryophytes and spermatophytes section of our study, we compared our results with 19th century floristic surveys, before the dam was built. During the vegetative growth period, the hydro-peaking frequency was low. The plant richness was highest near the dam. The macrophyte communities were highly modified according to the distance to the dam. The frequency and magnitude of hydro-peaking was related to the aquatic macrophyte richness in an Intermediate Disturbance Hypothesis position. However, the results of the eco-historical comparison with 19th century floristic surveys point to the original nature of the flora found at the site. Some floral patterns, seen during both periods and at an interval of 133 years, were indicative of the ubiquity of the aquatic flora and of the plants’ adaptability. This demonstrates the importance of taking river basin history into account in such biological surveys.

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

    Science.gov (United States)

    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. PMID:17300893

  11. Peatmoss (Sphagnum) diversification associated with Miocene Northern Hemisphere climatic cooling?

    Science.gov (United States)

    Shaw, A Jonathan; Devos, Nicolas; Cox, Cymon J; Boles, Sandra B; Shaw, Blanka; Buchanan, Alex M; Cave, Lynette; Seppelt, Rodney

    2010-06-01

    Global climate changes sometimes spark biological radiations that can feed back to effect significant ecological impacts. Northern Hemisphere peatlands dominated by living and dead peatmosses (Sphagnum) harbor almost 30% of the global soil carbon pool and have functioned as a net carbon sink throughout the Holocene, and probably since the late Tertiary. Before that time, northern latitudes were dominated by tropical and temperate plant groups and ecosystems. Phylogenetic analyses of mosses (phylum Bryophyta) based on nucleotide sequences from the plastid, mitochondrial, and nuclear genomes indicate that most species of Sphagnum are of recent origin (ca. <20 Ma). Sphagnum species are not only well-adapted to boreal peatlands, they create the conditions that promote development of peatlands. The recent radiation that gave rise to extant diversity of peatmosses is temporally associated with Miocene climatic cooling in the Northern Hemisphere. The evolution of Sphagnum has had profound influences on global biogeochemistry because of the unique biochemical, physiological, and morphological features of these plants, both while alive and after death.

  12. Vegetation Degradation and Its Correlation with Rainfall Interception and Soil in Rocky Desertification Area of Northern Guangdong%粤北石漠化地区植被退化及其与降雨截留量和土壤的相关性

    Institute of Scientific and Technical Information of China (English)

    陆冠尧; 魏兴琥; 李森; 熊彦; 雷俐

    2013-01-01

    在粤北石漠化地区运用面上调查、定位观测和模拟降雨试验相结合的方法,研究了石漠化地区植被退化特征及其与降雨截留量、土壤的相关性.结果表明:石漠化土地从轻度→中度→重度→极重度变化时,植物群落从草本+藤本+乔灌木→草本→苔藓变化,群落层片从4层→4层→2层→1层变化,平均高度从87.06 cm→63.32 cm→42.13cm→6.21 cm变化,物种减少比例从0%→14%→46%→86%变化,植物优势种从黄连木+苎麻+黄荆+三裂叶野葛→黄连木+青蒿+野菊→五节芒+野古草+牛筋草→苔藓变化,Margalef丰富度指数从2.33→2→1.25→0.33变化,Shannon-Wiener指数从2.96→2.31→1.94→0.42变化.植被退化特征与降雨和土壤理化性质都呈显著相关性.%We studied the vegetation degradation and its correlation with rainfall interception and soil in rocky desertification area of northern Guangdong with methods of site investigation, station-oriented observation and simulated test. The results showed that: In accordance to the light, middle, severe and extremely severe rocky desertificaiton, the plant community succession was from Herb + liana + shrub + Arbor to herb to bryophyta, the community's layer was from 4 layers to 4 layers to 2 layers to 1 layer; the average height was from 87. 06 cm to 63. 32 cm to 42. 13 cm to 6. 21 cm; proportion of species reduction was from 0% tol4% to 46% to 86%; the dominant species of plants were from Pistacia chinensis + Boehmeria nivea+Vitex negundo + Pueraria phaseoloides to Pistacia chinensis + Artemisia apiacea + Chrysanthemum, indicum to Miscanthus floridulu+Arundinella anomala + Eleusine indica to bryophyta; the Margalef index was from 2. 33 to 2 to 1. 25 to 0. 33; the Shannon-Wiener index was from 2. 96 to 2. 31 to 1. 94 to 0. 42. There is a significant correlation both between vegetation degradation and rainfall and between vegetation degradation and soil.

  13. Lutitas negras lacustres cercanas al límite Paleógeno-Neógeno en la región noroccidental de la provincia del Neuquén: Evidencias palinológicas Lacustrine black shales near to the Paleogene - Neogene boundary in north-western Neuquén Province: palynological evidence

    Directory of Open Access Journals (Sweden)

    H. A. Leanza

    2002-09-01

    Full Text Available Se muestrearon con fines palinológicos sedimentitas lacustres referidas a la Formación Lileo nov. aflorantes en las cercanías de la localidad de Los Miches, en el noroeste de la provincia del Neuquén, República Argentina. Sobre la base del análisis microflorístico las capas portadoras de palinomorfos pueden asignarse al Oligoceno Tardío - Mioceno Temprano. Las rocas muestreadas se caracterizan por lutitas negras, gris verdosas, gris oscuras y castaño claras, alternando con niveles delgados, a veces oolíticos de calizas gris claras, con superficie de meteorización blanco amarillenta. Entre estas sedimentitas se intercalan andesitas, tobas y aglomerados volcánicos de composición mesosilícica. En los afloramientos del área del río Guañacos se observan capas irregulares de carbonato fibroso tanto como baritina nodular con estructura fibroradial, junto con bivalvos indeterminados de agua dulce. La asociación microflorística muestra relativamente baja diversidad. En general, el género Nothofagidites domina la asociación. Los componentes principales de la microflora consisten en granos de polen pertenecientes a varios taxones de angiospermas, tales como Baumannipollis sp. cf. B. variaperturatus, Corsinipollenites atlantica, Milfordia sp., Nothofagidites saraensis, Smilacipites sp. cf. S. echinatus and Tricolpites asperamarginis junto con granos de polen de angiospermas de Araucariacites australis, Equisetosporites notensis y Podocarpidites spp. Los elementos de Pteridophyta/Bryophyta están representados por Cyatheacidites annulatus, Cicatricosisporites sp., Deltoidospora sp., Lycopodiumsporites austroclavatidites, Ricciaesporites sp. y Laevigatosporites ovatus, mientras que entre los taxones lacustres se reconocieron Azolla sp. y Botryococcus sp. (Chlorophyta.Lacustrine sedimentary rocks referred to the Lileo Formation nov. cropping out near Los Miches locality, northwestern Neuquén Province, Argentine Republic, were sampled for

  14. 模式生物小立碗藓遗传转化系统的研究进展%The Genetic Transformation System in Model Species Physcomitrella patens

    Institute of Scientific and Technical Information of China (English)

    汪运洋; 王春梅; 陈琛; 施定基

    2012-01-01

    苔藓植物小立碗藓是迄今发现的同源重组率最高的陆生植物,堪与酵母媲美,具有“绿色酵母”之称.高的同源重组频率、简单的发育模式以及单倍体配子体为主的生活史使其渐渐成为研究生物学进程和发育模式的新型模式生物.现对近年来小立碗藓遗传转化系统研究的进展进行总结和分析,为相关研究工作者充分利用这一体系提供帮助.对小立碗藓遗传表达系统的载体构建、转化方法及宿主细胞准备等方面的进展进行了综述,对小立碗藓在基因打靶方面的应用进行了简要总结.%Gene-targeting efficiency in the land plant Physcomitrella patens ( Bryophyta) can only be compared with that observed in Saccharomyces cerevisiae. Physcomitrella patens, as the new "green yeast" , might well become a major tool for functional genomic studies of multicellular eukaryotes. In addition, the relatively simple developmental pattern and the haploid gametophyte in the life history make it a suitable genetic tool. Molecular tools and genetic information are rapidly developing for P. Patens. The current knowledge of Physcomitrella patens transformation system including the construction of vector, the transformation method and the preparation of the host cells are reviewed. The application of the Physcomitrella patens genetic transformation system was exampled at the last.

  15. Endolithic diversity of microorganisms on sandstone and implications for biogenic weathering

    Science.gov (United States)

    Hallmann, C.; Friedenberger, H.; Hoppert, M.

    2012-04-01

    Molecular methods allow a comprehensive view on uncultured microbial communities in dimension stone. In the presented study, we focus on depth profiles of microbial colonization in sandstones with different porosity and overall durability. All sandstones were taken from quarries where they were exposed to the environment for several years. Approximately 0.1 g of material from the stone surface, from 5 mm and from 30 mm depths was taken under sterile conditions and subjected to analysis of microbial DNA and culturing experiments. In particular, DNA was extracted from the material, the phylogenetic marker gene of eukaryotic organisms (18S rDNA) was amplified and used for generation of clone libraries, which were then analysed by sequencing. "Roter Wesersandstein" was just colonized at the material surface, predominantly with algal and fungal microorganisms. No environmental DNA could be isolated from depth profiles. From "Nebraer Sandstein" with high pore size (shown by thin sections), environmental DNA from depths down to 3 cm could be retrieved. Though the uppermost layer is dominated by microalgae (as concluded from the retrieved clones), the percentage of algal clones from 5 mm and 30 mm depths drop to 10 % of all clones. There, apart from filamentous fungi, moss clones clearly dominate the microbial community. At a depth of 30 mm, 70-80 % of the retrieved clones match to various mosses (Bryophyta). Though mosses do not form layers on the stone surfaces, moss rhizoids or protonemata must be abundant as endoliths inside the stone material. It is reasonable to assume that the rhizoids may contribute to an increase in pore size by active penetration of the clastic material, even though colonization of the surface by mosses is not obvious. This feature may imply stronger impact of stone decay induced by endolithic growth of bryophytes than hitherto observed.

  16. Lutitas negras lacustres cercanas al límite Paleógeno-Neógeno en la región noroccidental de la provincia del Neuquén: Evidencias palinológicas

    Directory of Open Access Journals (Sweden)

    H. A. Leanza

    2002-09-01

    Full Text Available Se muestrearon con fines palinológicos sedimentitas lacustres referidas a la Formación Lileo nov. aflorantes en las cercanías de la localidad de Los Miches, en el noroeste de la provincia del Neuquén, República Argentina. Sobre la base del análisis microflorístico las capas portadoras de palinomorfos pueden asignarse al Oligoceno Tardío - Mioceno Temprano. Las rocas muestreadas se caracterizan por lutitas negras, gris verdosas, gris oscuras y castaño claras, alternando con niveles delgados, a veces oolíticos de calizas gris claras, con superficie de meteorización blanco amarillenta. Entre estas sedimentitas se intercalan andesitas, tobas y aglomerados volcánicos de composición mesosilícica. En los afloramientos del área del río Guañacos se observan capas irregulares de carbonato fibroso tanto como baritina nodular con estructura fibroradial, junto con bivalvos indeterminados de agua dulce. La asociación microflorística muestra relativamente baja diversidad. En general, el género Nothofagidites domina la asociación. Los componentes principales de la microflora consisten en granos de polen pertenecientes a varios taxones de angiospermas, tales como Baumannipollis sp. cf. B. variaperturatus, Corsinipollenites atlantica, Milfordia sp., Nothofagidites saraensis, Smilacipites sp. cf. S. echinatus and Tricolpites asperamarginis junto con granos de polen de angiospermas de Araucariacites australis, Equisetosporites notensis y Podocarpidites spp. Los elementos de Pteridophyta/Bryophyta están representados por Cyatheacidites annulatus, Cicatricosisporites sp., Deltoidospora sp., Lycopodiumsporites austroclavatidites, Ricciaesporites sp. y Laevigatosporites ovatus, mientras que entre los taxones lacustres se reconocieron Azolla sp. y Botryococcus sp. (Chlorophyta.

  17. Long-term patterns of chironomid assemblages in a high elevation stream/lake network (Switzerland – Implications to global change

    Directory of Open Access Journals (Sweden)

    Brigitte Lods-Crozet

    2012-10-01

    Full Text Available A long-term monitoring program was initiated in 2002 on running and standing waters in a high elevation cirque landscape (Macun in the Swiss National Park. The region comprises contrasting basins with different water sources, a glacier-fed basin and two precipitation-fed basins. Sampling of 26 permanent and temporary ponds (or small lakes and of interconnecting streams (10 sites was conducted from 2002 to 2010. Pond macroinvertebrate assemblages were dominated by chironomids with 42 taxa. The Orthocladiinae were the dominant subfamily in richness and abundance with 22 taxa. The greatest diversity was found in ponds located in the south and outlet basins. The inter-year variability for the same pond is high, but no clear temporal trend was noticed in ponds frequently monitored ponds. The Orthocladiinae subfamily was also the richest in the stream sites where 33 taxa were collected. The north and south basins were separated on the basis of chironomid assemblages. The chironomid assemblages in the stream network shows a temporal trend from 2002 but it cannot be linked to any clear change at the community structure level. The higher richness and abundance in stream sites and ponds of the south basin could be related to a greater heterogeneity in water physico-chemistry and substrata, and by the presence of Bryophyta. The understanding of the environmental factors that influence faunal assemblages is crucial for the protection of this sensitive alpine pond network where a relatively high overall regional diversity (49 taxa is detected. From the literature, temperature is recognized as the driving force on changes in chironomid assemblages in alpine systems. Our results support the use of chironomids as flagship indicators in the assessment of climatic change in alpine landscapes.doi: 10.5324/fn.v31i0.1361.Published online: 17 October 2012.

  18. Health Assessment of Fir Forest Community Structure at Mount Sejila in Tibet%西藏色季拉山冷杉群落结构健康评价

    Institute of Scientific and Technical Information of China (English)

    丁云春; 杨小林; 辛福梅; 马和平

    2014-01-01

    选择西藏色季拉山急尖长苞冷杉天然林为研究对象,在海拔梯度上以群丛作为评价的基本单位,进行冷杉群落结构健康评价。对群落物种多样性和群落结构特征因子,采用主成分分析,筛选主要评价指标,结合层次分析法( AHP法)进行健康排序。结果表明,对冷杉林群落结构健康影响最大的因子依次为:年龄结构、灌木层盖度、乔木株数、更新数量、草本种类、郁闭度、草本层盖度、灌木种类、乔木种类和亚层数共10个因子。健康排序次序为急尖长苞冷杉-林芝云杉群丛、急尖长苞冷杉+忍冬群丛、急尖长苞冷杉+杜鹃群丛、急尖长苞冷杉+苔藓群丛。%This article selected the natural forest of Abies georgei var.smithii at MountSejila as research object .The Analytic Hierar-chy Process (AHP method) extracted the most important assessment indexes in many factors ,which belonged to biological diversity and characteristics of the community,used principal component analysis and Analytic Hierarchy Process (AHP method) to arrange healthy indexes.The results show that the greatest impact on the health of the community structure to forest of Fir community followed age structure,shrub coverage,tree quantity,regeneration quantity,herb species,canopy density,herb coverage,shrub species,tree species,and sub-layer.The health sortings were Ass .Abies georgei var.smithii-Picea likiangensis var.linzhiensis,Ass.Abies georgei var.smithii+Lonicera spp.,Ass.Abies georgei var.smithii+Rhododendron spp.and Abies georgei var.smithii+Bryophyta spp.Ass.

  19. 新疆科古琴山高山流石坡植被的特征%The characteristics of vegetation of rock-flowing hillside of high mountains on Mountain Keguqin in Xinjiang

    Institute of Scientific and Technical Information of China (English)

    张锡成

    2001-01-01

    In this paper,the result of a study on floristics characteristics,plant community and biology-ecology features of vegetation growing along rock-flowing hillside of high mountains on Mountain Keguqin in Xinjiang is provided.Till now 17 families,27 genera and 34 species of seed plants,5 species of lichenes and 9 species of bryophyta are found in this area.The flora consists of few plant species (including some fewer endemic palnt species) which are young and prominently showing temperate character.Growing sparsely with little coverage,the plant community shows simple structure,indefinite synusiae differences and dull aspect.Some obvious differences exist among plants due to different inclination-exposure.The plants on rock-flowing hillside of high mountains have many adaptabilities.They have short bodies,microphyllies,strong root systems and rosella shapes.They are cespitose,pappose,perennial and mainly of vegetative propagation.They are coldresistant and have short growth periods also.More methods should be taken to protect the vegetation including some valuable wild medical plant resources of rock-flowing hillside of high mountains.%研究对新疆科古琴山高山流石坡植被的植物区系特点、植物群落特征和生物-生态学特性进行了论述。初步查明该地有种子植物17科27属34种、藓类5种、地衣9种。说明该地种子植物种类贫乏,特有种少,植物区系成分年轻,温带特点突出。植物生长稀疏,盖度小,植物群落结构简单、层次分化不明显、季相单调。植被因坡度、坡向的不同存在明显差异。其植物具有株矮、叶小、根系发达、丛生、莲座状、体被茸毛、生长期短、以营养繁殖为主、多年生、耐寒等特性。应加强对高山流石坡植被及其野生药用植物资源的保护。

  20. The Endemic Plant Taxa of the Köprülü Kanyon National Park and Its Surroundings (Antalya-Isparta

    Directory of Open Access Journals (Sweden)

    Hasan ÖZÇELİK

    2014-07-01

    Full Text Available This study has been conducted in 2003-2004 in order to identify the endemic plants of the Köprülü Kanyon National Park (Antalya-Isparta and its surroundings. A total of 230 endemic taxa belonging to 29 families were determined in the national park and its surroundings. There are 229 taxa belonging to Angiospermae subdivision and 1 taxon belonging to Gymnospermae subdivision in these collected and identified endemic taxa from the research area. There is no endemic taxon in the Bryophyta and Pteridophyta divisions of the park. 218 of the 229 taxa belonging to the Angiospermae subdivision are in the Magnoliopsida (Dicotyledoneae class and other 11 are in the Liliopsida (Monocotyledoneae class. 18 taxa of the vascular plants are specific to the research area. 44 of endemic taxa are included in the endangered category. The number of priority conservation requiring taxa is 21. Endemic taxon number is almost 25% of total flora of the area. The top five families with the highest number of taxa in the study area are Lamiaceae (38, Caryophyllaceae (37, Asteraceae (26, Scrophulariaceae (20, Fabaceae (16 (Table 2. The 10 largest genera with the highest number of taxa are as follows: Silene (15, Astragalus (9, Sideritis (8, Verbascum (7, Centaurea (7, Stachys (6, Helichrysum (6, Alkanna (6, Veronica (5 and Minuartia (5. The distributions according to the phytogeographical regions of the endemic plants identified from the area is as follows: 59.565% Mediterranean elements (137 taxa, 23.478% Irano-Turanian elements (54 taxa, 0.304% Euro-Siberian elements (7 taxa and 13.913% with unknown phytogeographical region (32 taxa. The distributions of these taxa according to the conservation status is as follows: CR (Critically Endangered: 3, EN (Endangered: 22, VU (Vulnerable: 34, LR (Low Risk: 164, (cd (Conservation Dependent: 29, (lc (Least Concern: 106, (nt (Near Threatened: 29. In this study, menacing factors on the flora and vegetation of the area and

  1. Palynostratigraphy of the Nayband Formation, Tabas, Central Iran Basin: Paleogeographical and paleoecological implications

    Science.gov (United States)

    Sajjadi, F.; Hashemi, H.; Borzuee, E.

    2015-11-01

    paleozoological evidence, slightly deviates from that previously envisioned (Early Jurassic) for upper part of the Nayband Formation at the section examined. Moreover, lack of such Early Jurassic (Hettangian) key taxa as Trachysporites fuscus, Cerebropollenites thiergartii, Heliosporites reissingeri, and Pinuspollenites minimus in the assemblages studied upholds this conclusion. Apparent taxonomical dissimilarity between the Norian and Rhaetian palynofloras examined and joint occurrence in the latter of several Rhaetian miospore species known as independently occurring in assemblages from either southern or northern hemisphere is interpreted to reflect geodynamic history of the Iran Plate during Late Triassic. Inferred natural relationships of the Nayband sporae dispersae imply derivation from such diverse parental flora as, in descending quantitative order, Pterophyta, Lycopodophyta, Arthrophyta, Coniferophyta, Ginkgophyta, Pteridospermophyta, and Bryophyta. Abundance of ferns and coniferophytes in parent flora of the palynofloras investigated implies that the host strata accumulated under a moist warm climate with progressively decreasing temperature during late Late Triassic.

  2. Molecular evolution of glutamine synthetase II: Phylogenetic evidence of a non-endosymbiotic gene transfer event early in plant evolution

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    Tartar Aurélien

    2010-06-01

    Full Text Available Abstract Background Glutamine synthetase (GS is essential for ammonium assimilation and the biosynthesis of glutamine. The three GS gene families (GSI, GSII, and GSIII are represented in both prokaryotic and eukaryotic organisms. In this study, we examined the evolutionary relationship of GSII from eubacterial and eukaryotic lineages and present robust phylogenetic evidence that GSII was transferred from γ-Proteobacteria (Eubacteria to the Chloroplastida. Results GSII sequences were isolated from four species of green algae (Trebouxiophyceae, and additional green algal (Chlorophyceae and Prasinophytae and streptophyte (Charales, Desmidiales, Bryophyta, Marchantiophyta, Lycopodiophyta and Tracheophyta sequences were obtained from public databases. In Bayesian and maximum likelihood analyses, eubacterial (GSIIB and eukaryotic (GSIIE GSII sequences formed distinct clades. Both GSIIB and GSIIE were found in chlorophytes and early-diverging streptophytes. The GSIIB enzymes from these groups formed a well-supported sister clade with the γ-Proteobacteria, providing evidence that GSIIB in the Chloroplastida arose by horizontal gene transfer (HGT. Bayesian relaxed molecular clock analyses suggest that GSIIB and GSIIE coexisted for an extended period of time but it is unclear whether the proposed HGT happened prior to or after the divergence of the primary endosymbiotic lineages (the Archaeplastida. However, GSIIB genes have not been identified in glaucophytes or red algae, favoring the hypothesis that GSIIB was gained after the divergence of the primary endosymbiotic lineages. Duplicate copies of the GSIIB gene were present in Chlamydomonas reinhardtii, Volvox carteri f. nagariensis, and Physcomitrella patens. Both GSIIB proteins in C. reinhardtii and V. carteri f. nagariensis had N-terminal transit sequences, indicating they are targeted to the chloroplast or mitochondrion. In contrast, GSIIB proteins of P. patens lacked transit sequences, suggesting

  3. 祁连山青海云杉林动态监测样地群落特征%Community Structure of a Dynamical Plot of Picea crassifolia Forest in Qilian Mountains, China

    Institute of Scientific and Technical Information of China (English)

    李效雄; 刘贤德; 赵维俊

    2013-01-01

    structure difference is obvious for the P. crassifolia community, and it can be divided into tree layer, shrub layer, herb layer and bryophyta layer. The tree layer is the main layer of the community, and its vertical structure is more complex than the shrub layer and herb layer, and the bryophyta layer is also well developed. (2) The diameter structure of the P. crassifolia community is obviously an "inverted-J" form, the DBH of the individuals is concentrated in 1 - 5 cm and 21 - 25 cm, which account for 91. 42% of the total individuals, so regeneration of the P. crassifolia population is good. (3) The height structure of the P. crassifolia individuals with DBH greater than 1 cm is single-peak form, and the height of the main individuals is less than 6 m, which account for more than 60. 00% of the total individuals. So the height of the P. crassifolia individuals is relatively low, and young trees are much, mid trees hold a certain proportion, and big trees are little. There is a significantly quadratic function relation between the tree height and the DBH of the P. crassifolia (P< 0. 05). (4) The spatial distribution of the P. crassifolia individuals displays obviously a clustering distribution pattern. The point pattern analysis of small trees, mid trees and big trees of the P. crassifolia community shows that the clump intensity of the P. crassifolia population reduces with the increasing of the population age, and the congregation distribution turns into random distribution, which displays obviously a diffusion trend. There is no obvious spatial heterogeneity for spatial distribution of the P. crassifolia individuals, and 2 534 big trees of the P. crassifolia community are randomly distributed in the large plot, showing no significant human interference.

  4. Briófitas do Município de Poconé, Pantanal de Mato Grosso, MT, Brasil Bryophytes from Pocone county, Pantanal of Mato Grosso, Brazil

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    Paulo Eduardo Aguiar Saraiva Câmara

    2004-12-01

    Full Text Available Sofrendo influências de outros ecossistemas, tais como o Cerrado e a Floresta Amazônica, o Pantanal de Mato Grosso constitui um ecossistema único. Embora sua flora fanerogâmica seja relativamente bem conhecida, a brioflora ainda necessita ser estudada mais profundamente. Fazendo parte da bacia do bio Paraguai e localizado a 94,8km de Cuiabá nas coordenadas 16º15'24"S e 56º36'24"W, o Município de Poconé possui uma população de cerca de 30.000 habitantes. Foram realizadas coletas briológicas nos anos de 1984, 1999 e 2000, tendo sido encontradas 12 espécies pertencentes a 12 famílias de Bryophyta e 10 espécies distribuídas em duas famílias de Marchantiophyta, sendo Lejeuneaceae a melhor representada, com oito espécies. Foram encontradas cinco novas ocorrências para o região Centro-Oeste: Trichosteleum fluviale (Mitt. Jaeg., Frullania tetraptera Nees & Mont., Lejeunea glauscescens Gottsche, Lejeunea calcicola Schuster, Lejeunea caespitosa Lindenb. São ainda citadas nove novas ocorrências para o Estado do Mato Grosso: Hyophila involuta (Hook. A. Jaeg., Groutiella apiculata (Hook. Crum & Steere, Fabronia macroblepharis Schwaegr., Trichosteleum fluviale (Mitt. Jaeg., Frullania arecae (Spreng. Gottsche, Frullania tetraptera Nees & Mont., Lejeunea glauscencens Gottshe, Lejeunea calcicola Schuster e Lejeunea caespitosa Lindenb. Lejeunea calcicola Schuster é citada pela segunda vez para o Brasil.Under the influence of outer ecosystems, such as the Cerrado and Amazon rain forest, the Pantanal of Mato Grosso is a unique ecosystem. Otherwise his fanerogamic flora is well known, the bryoflora is yet to be properly discovered. As part of Paraguai river basin and located at 94.8km from Cuiabá at 16º15'24"S and 56º36'24"W, the county of Poconé has a population around 30,000 hab. Colects were taken in 1984, 1999 and 2000. Among the Division Bryophyte 12 species in 12 familie were founs. In the Division Marchantiophyta 10 species in two

  5. 基于GIS和MaxEnt比较中国砂藓属与紫萼藓属植物地理分布%Comparison of the Geographical Distribution of Racomitrium and Grimmia in China Using ArcGis and MaxEnt Software

    Institute of Scientific and Technical Information of China (English)

    于晶; 唐艳雪; 郭水良

    2012-01-01

    Grimmia and Racomitrium are two important genera of the family Grimmiaceae (Musci,Bryophyta). To predict and compare their potential distribution regions in relation to climatic conditions in China,and thereby help their conservation and subsequent field investigations,we modeled the geographical distribution at the genus level by using a maximum entropy algorithm modeling program (MaxEnt) based on 172 presence-only data for Grimmia and 181 data for Racomitrium, as well as 19 bioclimatic variables. We found Grimmia had higher habitat suitability in Zhejiang (0. 7099, integrated habitat suitability index), Jiangsu (0. 6212),Beijing (0. 5987) Jianjin (0. 5648),Yunnan (0. 5532) ,Liaoning (0. 5515),Taiwan (0. 5422) ,Anhui (0. 5398) ,and Jilin (0. 4945),while Racomitrium had higher habitat suitability in Zhejiang (0. 889 ), Shanghai (0. 6564), Hong Kong (0. 5897 ), Taiwan ( 0. 5858 ), Guizhou ( 0. 5354 ), Hubei ( 0. 5039 ), Yunnan (0. 4885 ), Chongqing ( 0. 4871 ), Jiangsu (0. 4793) ,and Anhui (0. 4552). Comparison between the predicted distribution of Racomitrium and that of Grimmia showed that Racomitrium had higher distribution probability in Hong Kong,Chongqing, Guizhou, Guangdong, Guangxi, Hubei, Hainan, and Taiwan than Grimmia,similar distribution probability to that of Grimmia in Jiangxi,Fujian,Hunan,and lower than Grimmia in the other provinces (municipality autonomous regions). Grimmia belonged to the typical moderate geographical element,mainly in the high altitude and cold districts.%基于19个生物气候因子和紫萼藓属(Grimmia) 172个、砂藓属(Racomitrium) 181个国内分布记录,应用MaxEnt模型和ArcGis 9.3软件,定量预测了紫萼藓属与砂藓属植物在“属”水平上在我国各省区的生境适应性特点.预测结果表明,紫萼藓属植物在浙江(0.7099,综合生境适宜性指数,下同)、江苏(0.6212)、北京(0.5987)、天津(0.5648)、云南(0.5532)、辽宁(0.5515)、台湾(0.5422)、安徽(0.5398)和吉林(0.4945)

  6. Molecular Phylogenetic Relationships Among Basal Mosses%基部藓类分子系统学研究

    Institute of Scientific and Technical Information of China (English)

    李姝婧; 贾渝; 王庆华

    2012-01-01

    基部藓类是稳定地处于藓类系统发育树基部的类群.它包括7纲,2亚纲,10目,10科,34属,637种.基部藓类虽然只占藓类种类的5%,但由于其内部各类群孢子体形态极为丰富,因此对于理解整个藓类植物的系统发育具有重要意义.通过对48个种(36个藓类、4个维管植物、2个角苔、4个苔类和2个藻类)的9个DNA片段(NU:26S,18S; MT:nad5,cox1; CP:rbcL,rps4,cp-LSU,cp-SSU,atpB)进行分子系统学分析,综合最大似然法(maximum likelihood)、最大简约法(most parsimony)和贝叶斯分析(Bayesian inference)方法的建树结果,理清了前人研究中存在冲突的类群之间的关系并为已确定的关系提供了更高的支持率.研究结果如下:(1)藻苔纲和泥炭藓纲互为姐妹类群,处于整个藓类的最基部;(2)黑藓纲与黑真藓纲互为姐妹类群(3)长台藓纲和具齿藓类组成单系;(4)四齿藓纲是所有具齿藓类的基部类群;(5)烟杆藓亚纲处于真藓纲的最基部,其次是短颈藓亚纲.以上结论在分子系统树上得到了很高的支持率.%Basal mosses are stable at the base of phylogenetic trees. Although they are a small part of mosses (10 families in 7 classes and 2 subclasses), they receive considerable attention because of their abundant morphological variations and importance in resolving the phylogeny of Bryophyta. We used maximum likelihood, Bayesian analysis and most parsimonious methods with data for 9 regions (26S, 18S, nad5, cox1, rbcL, rps4, cp-LSU, cp-SSU, atpB) to estimate the phylogenetic relationships of 48 species (36 mosses, 4 tracheophytes, 2 hornworts, 4 liverworts and 2 algaes). We resolved the previous incongruence among basal mosses and provide strong support for previous resolutions. The phylogenetic tree with high statistical support showed that (1) Takakiopsida and Sphagnopsida form a sister group at the base of the moss linage; (2) Andreaeopsida is sister to Andreaeobryopsida; (3) Oedipodiopsida forms a

  7. 一个编码含VQ模序蛋白的基因AtARVQ1参与拟南芥对砷酸盐的响应调控%AtARVQ1 encodes a novel VQ motif-containing protein involved in arsenate stress response regulation in Arabidopsis

    Institute of Scientific and Technical Information of China (English)

    刘安娜; 腾瑶; 徐文忠; 麻密

    2011-01-01

    Arsenate is a highly toxic heavy metal containing compound poisonous to most living organisms, including human and plants. We report that the AtARVQl gene encodes a plant-specific VQ motif-containing protein involved in the response and resistance of Arabidopsis to arsenate stress. The expression of AtARVQl was strongly downregulated by arsenate stress. To determine the function of AtARVQl in planta, transgenic Arabidopsis plants expressing AtARVQl driven by a CaMV-35S promoter were generated. Overexpressing transgenic lines with high levels of AtARVQl expression were observed to be more resistant to arsenate stress. Moreover, phylogenetic analysis showed that all homologs of AtARVQl were plant-specific and evolved from two primitive branches, which were classified into four clusters. The AtARVQl-like proteins in dicots and bryophyta were segregated into the two branches, whereas those in monocot plants all fall into one sub-branch. These results suggest that AtARVQl and its homologs may have important roles in the plant response to arsenate stress.%砷酸盐(Asv)是一种对包括人类和植物在内大部分生物具有剧毒的重金属.结果显示,编码含植物特有VQ模序蛋白基因AtARVQl (arsenate-_repressed V__Q motif-containing protein 1)参与拟南芥对Asv应答和抗性调控.结果表明,砷酸盐胁迫强烈抑制AtARVQ1基因在拟南芥中的转录表达.进一步利用组成型启动子CaMV 35S驱动AtARVQ1基因在拟南芥中的表达,获得在砷酸盐处理条件下增强AtARVQ1基因转录的超表达植株,发现超表达AtARVQ1可以明显提高拟南芥对砷酸盐的抗性水平.系统进化分析发现,含VQ模序结构的AtARVQ1同源基因为植物特有,并进化出两大分支4个子分支,这类同源基因在双子叶植物和苔藓中分布于两大分支上,而在单子叶植物中仅分布在同一子分支上.这些结果表明,AtAR VQ1基因在拟南芥对砷酸盐的抗性应答上有着重要作用,而其同源基因

  8. Diversity and primary productivity of hill beech forests from Doftana Valley (Romanian Subcarpathians

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    Mihaela Paucã-Comãnescu

    2009-11-01

    Full Text Available The hill beech forests cover most of the woody area in the Doftana Valley. The present study refers, for the first time, to two beech forests typical to this belt, which belong to the phytocoenological associations Epipactieto-Fagetum (Resmeritã,1972, in the Lunca Mare area, and Hieracio rotundati-Fagetum (Vida 1983, Täuber 1987 in the Sotrile area, from floristic, structural, biomass and necromassaccumulation point of view, within the framework of the vertical structure of biocoenosis.The limestone substratum, occasionally with small outcrops in the first beech forest, differs chiefly through the pH levels (6.34-5.67 from the siliceous substratum (pH 5.11-4.36 in the second beech forest. The layer of trees is dominated by Fagus sylvatica in both forests; this species is associated with Cerasus avium (4.5%,Acer pseudoplatanus (2% and Sorbus torminalis (2% in the first beech forest, and is monodominant in the second. Although the forest underwent selective cuts, more intense in the Lunca Mare area, the aboveground ligneous biomass reaches nowadays 222 t/ha in the Lunca Mare area compared to only 163 t/ha in the Sotrile area; theaverage height is 28.8±2.49 m and 23.7±1.12 m, respectively, and the diameter is 33.30±7.9 cm and 31.60±6.28 cm, respectively. The species of macrofungi, not very numerous during the study because of scarce precipitations (6 and 7 species, respectively,are predominant on the rhytidoma trees in the beech forest rooted on the limestone ground; in the Sotrile beech forest they are joined by mycorrhizal and parasite species. The layer of shrub is underdeveloped. The herbaceous layer is discontinuous, and includes, along herbs, small plants and saplings belonging to the ligneous species and to liana Hedera helix. The maximal value of the aboveground biomass of thelayer is 317 kg/ha DM in the Lunca Mare area and 235 kg /ha DM in the Sotrile area.Bryophyta is present in large quantities, especially in the ªotrile area

  9. Seafloor mapping at Olkiluoto western coast of Finland

    Energy Technology Data Exchange (ETDEWEB)

    Ilmarinen, K.; Leinikki, J.; Oulasvirta, P. (Alleco Oy, Helsinki (Finland))

    2009-02-15

    The objective of the study was to investigate the seafloor of shallow areas around Olkiluoto island, western Finland. The surveys were carried out by Alleco Ltd. Posiva will use the data for modeling purposes. The investigations included bathymetric surveys, sediment sampling and assessment of benthic macrophytes and macrozoobenthos in the underwater parts of six pre-defined survey transects extending from land to the sea. Sediment sampling and the assessment of benthic organisms were done by SCUBA diving. The study area showed a great variation in environmental conditions. Olkiluoto stands between almost open sea and extremely sheltered river mouth area of Lapinjoki. Two of the transects were more than 7 meters deep and included both hard and soft sand bottom. Whereas rest of the transects were shallow with mostly soft clay, mud and silt bottom. Altogether 27 species of algae including five species of stoneworts (Charophyta), one species of water moss (Bryophyta) and 16 species of vascular plants (Tracheophyta) were found. The most abundant group was vascular plants, between the other groups of macroalgae big differences in the abundance were not seen. Furthermore altogether 43 species of macrozoobenthos (Invertebrata) were found, of which six species were sessile bottom fauna (permanently attached fauna). The most abundant groups in the bottom samples were bivalves (Lamellibranchiata) (996 individuals per m2), snails (Gastropoda) (739 individuals per m2) and polychaetes (Polychaeta) (542 individuals per m2). The total abundance of macrozoobenthos on all transects was 2 899 individuals per m2. The biggest groups by biomass were bivalves (fresh weight 87 054 mg per m2) and polychaetes (fresh weight 12 983 mg per m2). Transect 1 was the richest in number of species of the deep and exposed transects 1 and 2. The transect 5 had the highest diversity of all the shallow soft bottom transects 3, 4, 5 and 5a. The high diversity of the transect 1 and 5 may be explained by

  10. Analysis of Algae Growing on the Surface of the North City Wall of Liangzhu Site%良渚北城墙考古土遗址表面藻类的分析研究

    Institute of Scientific and Technical Information of China (English)

    武发思; 汪万福; 贺东鹏; 徐瑞红; 苏伯民

    2014-01-01

    This paper seeks to better clarify the major algal groups that have caused biofouling to earthen sites preserved in humid environments and to provide evidence for studying biodeterioration while establishing ap-propriate countermeasures for later periods. Modern molecular biology research methods were applied for: the extraction of total DNA of the samples, amplification of the targeted fragments, construction of the clone library, determination of sequences, and analysis of phylogeny. Lab results show that three phylums and five genuses of algae might cause biofouling to the earthen sites. Among them, the Nostoc group which belongs to the phylum Cyanophyta is most dominant, the groups of Nitzschia and Phaeodactylum that belong to the phylum Bacillario-phyta are less dominant, and the Microcoleus of the phylum Cyanophyta and other unidentified genus of the phy-lum Chlorophyta are the least dominant. In addition, most sequences retrieved from some samples are similar to Leptobryum, which belongs to the Bryopsida class of the Bryophyta phylum. The differences in community com-ponents between photosynthetic algae and mosses are greatly influenced by the spatial positions of sampling sites and by the water contents of the soil. To reduce the lighting intensity and water penetration in the environment of the earthen sites might be the most efficient way to control the photosynthetic organism erosion.%为了探明造成潮湿环境土遗址生物污损的主要藻类类群,给后期生物退化机理的研究和防治体系的构建提供可靠依据,本研究采用现代分子生物学技术,对杭州良渚北城墙考古土遗址表面的藻类进行了检测和分析。结果表明,引起土遗址生物污损的病害藻类共3门5属,主要为蓝藻门念珠藻属类群,硅藻门菱形藻属与褐指藻属类群次之,蓝藻门壳藻属与绿藻门的未鉴定属最少。另外,苔藓植物门藓纲与薄囊藓属相近的类群在部分样品中占

  11. 脱水和复水过程中金发藓(Polytrichum commune)与湿地匐灯藓(Plagiomnium acutum)叶绿素荧光特性变化的比较研究%Comparison on Alternation of Chlorophyll Fluoroscence Between Polytrichum commune and Plagiomnium acutum During Dehydration and Rehydration

    Institute of Scientific and Technical Information of China (English)

    杜晓濛; 田向荣; 李菁; 石进校

    2012-01-01

    Polytrichum commune from relative drought habitat and Plagiomnium acutum from wet habitat were used as materials, and their chlorophyll fluroscence characteristics, such as ETR-PAR (Photosyntheti-cally Active Radiation-electron transportation rate) light respond curves, Fv/Fm (ratio of chlorophyll variation fluorescence), Y( II) (quantum yielding of PS II), qP (photochemical quenching) and NPQ (none-photochemical quenching) in diferent dehydration and rehydration treatments were detected by IMAGING-PAM analyzer (WALZ). In the procedure of desiccation, P. commune could sustain a higher inhibit light intensity (over 800 μmol/(m2·s)) and a stable ETR value (about 20), but inhibit light intensity of P. acutum menifested a dramatic decline and decreased to about 400 μmol/(m2·s), and ETR value could be inhibited to null. Fv/Fm, Y (II), qP of both two bryophyta species displayed a drop trends, nevertheless, P. commune contain a higher value. NPQ of two bryophytes manifested an obvious peak, and the peak of P. commune occured early and possess a lower alternative range. In the process of rehydration, inhibit light intensity and ETR value of both species recover rapidly, and P. commnue menifested slowly and was provide with less alternation. Fv/Fm, Y (II) of both species recover to normal state, and values of P. commune was higher. Results indicated that desiccation tolerance of bryophytes primarily rely on the repair ability in recovery process. But bryophytes from difer-ent habitat should reflect distinct response on desiccation, P. commune from relative drought habitat possess stronger desicccation tolerance than P. acutum from wet habitat.%以来自不同水分生境的金发藓(Polytrichum commune)和湿地匐灯藓(Plagiomnium acutum)为材料,利用叶绿素荧光成像技术比较了脱水和复水过程中两种藓类的荧光光响应曲线、光系统Ⅱ光能转化效率(ratio of chlorophyll variation fluorescence,Fv/Fm)、

  12. Diversity and primary productivity of hill beech forests from Doftana Valley (Romanian Subcarpathians

    Directory of Open Access Journals (Sweden)

    Mihaela Paucã-Comãnescu

    2009-12-01

    Full Text Available The hill beech forests cover most of the woody area in the Doftana Valley. The present study refers, for the first time, to two beech forests typical to this belt, which belong to the phytocoenological associations Epipactieto-Fagetum (Resmeriţă, 1972, in the Lunca Mare area, and Hieracio rotundati-Fagetum (Vida 1983, Täuber 1987 in the Sotrile area, from floristic, structural, biomass and necromass accumulation point of view, within the framework of the vertical structure of biocoenosis. The limestone substratum, occasionally with small outcrops in the first beech forest, differs chiefly through the pH levels (6.34-5.67 from the siliceous substratum (pH 5.11-4.36 in the second beech forest. The layer of trees is dominated by Fagus sylvatica in both forests; this species is associated with Cerasus avium (4.5%, Acer pseudoplatanus (2% and Sorbus torminalis (2% in the first beech forest, and is monodominant in the second. Although the forest underwent selective cuts, more intense in the Lunca Mare area, the aboveground ligneous biomass reaches nowadays 222 t/ha in the Lunca Mare area compared to only 163 t/ha in the Sotrile area; the average height is 28.8ą2.49 m and 23.7ą1.12 m, respectively, and the diameter is 33.30ą7.9 cm and 31.60ą6.28 cm, respectively. The species of macrofungi, not very numerous during the study because of scarce precipitations (6 and 7 species, respectively, are predominant on the rhytidoma trees in the beech forest rooted on the limestone ground; in the Sotrile beech forest they are joined by mycorrhizal and parasite species. The layer of shrub is underdeveloped. The herbaceous layer is discontinuous, and includes, along herbs, small plants and saplings belonging to the ligneous species and to liana Hedera helix. The maximal value of the aboveground biomass of the layer is 317 kg/ha DM in the Lunca Mare area and 235 kg /ha DM in the Sotrile area. Bryophyta is present in large quantities, especially in the Sotrile

  13. Programa de Pós-Graduação em Geologia - 2003 - Teses Defendidas - Doutorado - Instituto de Geociências, UFRJ

    Directory of Open Access Journals (Sweden)

    2003-01-01

    vegetação no holoceno da região norte do estado do Rio de Janeiro (Brasil - 167 p. A investigação da dinâmica da vegetação do norte do Estado do Rio de Janeiro nos últimos 7.000 amos baseou-se nos resultados obtidos pelas análises palinológicas de (1 sedimentos superficiais do fundo de duas lagoas situadas no município de Campos dos Goytacazes, (2 sedimentos recentes de solos periféricos a estas lagoas e (3 sedimentos de dois testemunhos, um coletado na Lagoa de Cima e um na Lagoa do Campelo. Foram considerados como palinomorfos os grãos de pólen, os esporos de Pteridophyta e Bryophyta, zigósporos e cenóbios de algas verdes. De acordo com os resultados obtidos foram caracterizados: 1. A dinâmica espacial na deposição recente de palinomorfos na superfície de fundo das lagoas. Foram analisadas 15 amostras de um transect de direção nordeste/sudoeste pela Lagoa de Cima. Os grãos de pólen em sua maioria refletiram a floresta que beira a lagoa e os afluentes Imbé e Urubu, com contribuição expressiva dos taxa regionais, bem como a importante contribuição de plantas hidrófitas e palustres e de plantas ruderais das vastas pastagens encontradas na área. Indicaram que na atualidade a tendência deposicional dos palinomorfos na Lagoa de Cima está condicionada pelos influxos dos rios Imbé e Urubu ocasionando uma diferenciação espacial na sedimentação conforme o tamanho dos palinomorfos, a proximidade do local de sedimentação em relação a desembocadura desses rios e a batimetria do leito da lagoa. Já na Lagoa do Campelo as 4 amostras de superfície de fundo, também retiradas na direção nordeste/sudoeste, revelaram um padrão diferenciado de deposição dos palinomorfos em relação à Lagoa de Cima. A análise palinológica revelou alta deposição de pólen de plantas hidrófitas e palustres. Os tipos arbóreos e arbustivos devem ter sua "área-fonte" de pólen em um pequeno fragmento florestal contíguo à borda nordeste da lagoa. Os