Tropical Forest Bryophytes

Pócs, Tamás

doi:10.1007/978-94-009-5891-3_3

Cited by 135 publications

(125 citation statements)

References 19 publications

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“…Os dados aqui apresentados corroboram as observações de Richards (1954) e Pócs (1982), quanto a diversidade de briófitas nas florestas tropicais estar diretamente relacionada à variedade de microhabitats para o seu desenvolvimento, a diversidade de microclimas e variedade de substratos disponíveis para plantas pequenas. Esses resultados demonstram a importância das RPPNs para a conservação da brioflora da Mata Atlântica no Estado.…”

Section: Resultsunclassified

“…As Florestas Tropicais Úmidas abrigam provavelmente a brioflora mais rica do mundo devido à sua complexidade e variedade de microhabitats (Pócs 1982;Gradstein 1995). A Mata Atlântica, considerada um dos mais ricos conjuntos de ecossistemas do planeta (Rambaldi et al 2003), abriga uma brioflora altamente diversa (Gradstein et al 2001), sendo o bioma com maior riqueza de hepáticas do Brasil (Gradstein & Costa 2003).…”

Section: Introductionunclassified

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A importância de Reservas Particulares do Patrimônio Natural para a conservação da brioflora da Mata Atlântica: um estudo em El Nagual, Magé, RJ, Brasil

Santos

Costa

2008

Acta Bot. Bras.

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RESUMO -(A importância de Reservas Particulares do Patrimônio Natural para a conservação da brioflora da Mata Atlântica: um estudo em El Nagual, Magé, RJ, Brasil). Foi realizado o levantamento das briófitas da RPPN El Nagual, uma área de floresta submontana no Estado do Rio de Janeiro. Foram registradas 137 espécies (um antócero, 70 hepáticas e 66 musgos) e duas variedades, distribuídas em 75 gêneros e 37 famílias, sendo cinco novas ocorrências para o estado. Lejeuneaceae (27 spp.), Pilotrichaceae (17 spp.), Aneuraceae (9 spp.) e Calymperaceae (8 spp.) destacam-se pela riqueza de espécies (44% da brioflora). Sete formas de vida foram caracterizadas, predominando trama (37%), tufo (16%) e talosa (15%). Seis tipos de substrato são colonizados na área, predominando espécies corticícolas (52%) e rupícolas (42%). Em relação aos padrões de distribuição, predominaram espécies neotropicais e pantropicais. Foram encontradas quatro espécies caracterizadas como vulneráveis no estado. Os resultados demonstram que a brioflora da RPPN é rica e evidenciam a importância dessa categoria de unidade de conservação na proteção de remanescentes de Mata Atlântica e conservação da brioflora.Palavras-chave: briófitas, Floresta Atlântica submontana, conservação, Rio de Janeiro ABSTRACT -(The importance of Private Natural Heritage Reserves for conservation of Atlantic rain forest bryoflora: a study at El Nagual, Magé, Rio de Janeiro State, Brazil). A floristic survey of the bryophytes was carried out in the El Nagual Private Natural Heritage Reserve, a submontane Atlantic rain forest remnant in Rio de Janeiro state. One hundred and thirty seven species were recorded (one Anthocerotae, 70 hepatics and 66 mosses) plus two varieties, in 75 genera and 37 families. Five species are new records for Rio de Janeiro state. Lejeuneaceae (27 spp.), Pilotrichaceae (17 spp.), Aneuraceae (9 spp.), and Calymperaceae (8 spp.) are especially rich in species (44% of the bryoflora). Seven life-forms were found; the most common are weft (37%), turf (16%), and thallose (15%). Six kinds of substrate were colonized, the most important species types being corticicolous (52%) and rupicolous (42%). The most common distribution patterns were Neotropical and Pantropical. Four species were considered to be vulnerable in the state. The results show that the bryoflora of the El Nagual Reserve is relatively rich and demonstrate the importance of this conservation unit category in the protection of remnant Atlantic rain forests and in the conservation of the bryoflora.

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Section: Resultsunclassified

Section: Introductionunclassified

A importância de Reservas Particulares do Patrimônio Natural para a conservação da brioflora da Mata Atlântica: um estudo em El Nagual, Magé, RJ, Brasil

Santos

Costa

2008

Acta Bot. Bras.

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“…Due to the lack of a protective cuticle, bryophytes are sensitive indicators of climatic conditions (Gignac 2001;Léon-Vargas et al 2006;Zotz and Bader 2009), and environmental changes, e.g., in insolation or air humidity, may result in rapid community composition changes and vertical shifts of bryophyte assemblages on host trees (Barkman 1958;Acebey et al 2003;Frego 2007). In comparison, chemical bark factors seem to play a minor role in shaping epiphytic bryophyte distributions in rainforest (Frahm 1990) and also host specificity is rare among tropical bryophytes (Pócs 1982;Richards 1984;Kürschner 1990). …”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of epiphytic bryophytes in an Indonesian rainforest

et al. 2009

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We studied species richness, composition and vertical distribution of epiphytic bryophytes in submontane rainforest of Central Sulawesi. Bryophytes were sampled on eight canopy trees and on eight trees in the forest understorey. Microclimate was measured at trunk bases and at crown bases. The total recorded number of 146 epiphytic bryophyte species is among the highest ever reported for tropical forests and underlines the importance of the Malesian region as a global biodiversity hotspot. Species composition differed significantly between understorey trees and canopy tree trunks on the one hand, and the forest canopy on the other. Fourty-five percent of the bryophyte species were restricted to canopy tree crowns, 12% to the understorey. Dendroid and fan-like species mainly occurred in the forest understorey whereas tufts were most species rich in the tree crowns. The findings reflect the different microclimatic regimes and substrates found in the understorey and in the forest canopy. The results indicate that assessments of the bryophyte diversity of tropical forests are inadequate when understorey trees and tree crowns are excluded.

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“…Mosses can be found on every continent and in every terrestrial ecosystem, from tropical rain forests (1) to arid deserts (2) to polar tundra (3). To survive in such diverse and often extreme environments, these sedentary organisms must possess an equally diverse set of physiological adaptations.…”

mentioning

confidence: 99%

Cryptic species within the cosmopolitan desiccation-tolerant moss Grimmia laevigata

Fernandez

Shevock

Glazer

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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The common cushion moss Grimmia laevigata (Bridel) Bridel grows on bare rock in a broad range of environments on every continent except Antarctica. As such, it must harbor adaptations to a remarkably broad set of environmental stresses, the extremes of which can include very high temperatures, prolonged nearly complete desiccation, and high ultraviolet B (UVB) exposure. Yet, like many mosses, G. laevigata shows very little morphological variability across its cosmopolitan range. This presents an evolutionary puzzle, the solution to which lies in understanding the phylogeographic structure of this morphologically simple organism. Here we report the results of an analysis of amplified fragment length polymorphisms (AFLPs) in G. laevigata, focusing on individuals from the California Floristic Province. We found evidence that populations within California constitute two distinct geographically overlapping cryptic species. Each clade harbors multiple private alleles, indicating they have been genetically isolated for some time. We suggest that the existence of cryptic species within G. laevigata, in combination with its life history, growth habits, and extreme desiccation tolerance, makes this moss an ideal research tool and a candidate for a biological indicator of climate change and pollution.amplified fragment length polymorphisms ͉ bioindication ͉ California Floristic Province ͉ Grimmiaceae ͉ phylogeography

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Tropical Forest Bryophytes

Cited by 135 publications

References 19 publications

A importância de Reservas Particulares do Patrimônio Natural para a conservação da brioflora da Mata Atlântica: um estudo em El Nagual, Magé, RJ, Brasil

A importância de Reservas Particulares do Patrimônio Natural para a conservação da brioflora da Mata Atlântica: um estudo em El Nagual, Magé, RJ, Brasil

Vertical distribution of epiphytic bryophytes in an Indonesian rainforest

Cryptic species within the cosmopolitan desiccation-tolerant moss Grimmia laevigata

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