Quantitative Approaches in Bryophyte Ecology

Bates, J. W.

doi:10.1007/978-94-009-5891-3_1

Cited by 21 publications

(22 citation statements)

References 108 publications

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“…The Shannon-Wiener (H ') index with natural logarithm (Napierian base) was used for calculating diversity. In this case, the frequency of each species (number of samples of the species collected in the area) instead of abundance (total number of individuals of each species collected in the area) was used in the calculations because the small size and fragmented nature of bryophytes prevent quantification of individuals (Bates 1982). Floristic composition of the study areas was compared based on the presence and absence of species using the Bray-Curtis method.…”

Section: Discussionmentioning

confidence: 99%

Habitat heterogeneity and diversity of bryophytes in campos rupestres

2017

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Campos rupestres (rupestrian grasslands) are characterized by the presence of rock outcrops associated with an herbaceous-shrub physiognomy typically growing on quartzitic soils; they occur a wide variety of habitats. Bryophytes respond rapidly and effi ciently to variation in microclimate. Th e present work aimed to study bryophyte species richness, diversity and composition, their life forms, and the substrates they colonize in exposed and shaded habitats in campos rupestres of Chapada Diamantina. Collections were made in 25 x 25 m sampling plots. One hundred and nine species were recorded and included a predominance of mosses (78 spp.) over liverworts (31 spp.). Most species (79 %) were restricted to one of the two types of habitat (exposed versus shaded). While the genera Campylopus, Polytrichum, Schlotheimia, Macromitrium and Syrrhopodon were prevalent in exposed habitats, Sphagnum, Lepidozia, Micropterygium, Bazzania and Odontoschisma prevailed in shaded habitats. Th e rupicolous community was more prominent than the other communities in both types of habitat. "Weft" was the most frequent life form in shaded areas, while "turf" predominated in exposed sites. Th e high number of rare, and exclusive, species illustrates the high degree of heterogeneity among bryophyte communities in campos rupestres, and demonstrates the importance of habitat heterogeneity for the high diversity.

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Section: Discussionmentioning

confidence: 99%

Habitat heterogeneity and diversity of bryophytes in campos rupestres

2017

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“…A diversidade das briofloras nos plots e nos ecossistemas foi calculada através do índice de Shannon-Wiener (H'), conforme descrito em Ricklefs (1996), que analisa tanto o número de espécies como a equitabilidade entre elas (Krebs, 1989), sendo considerada como abundância relativa a freqüência das populações de cada espécie de indivíduos, pois o tamanho e a natureza fragmentária das briófitas impossibilita a contagem de indivíduos (Bates, 1982). O cálculo da diversidade foi realizado através do software Programs for Ecological Methodology.…”

Section: Coleta E Identificação De Briófitasunclassified

Contribuição para o conhecimento da taxonomia, ecologia e fitogeografia de Briófitas da Amazônia Oriental

Alvarenga

Lisbôa

2009

Acta Amaz.

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O presente trabalho documenta o inventário da brioflora da Estação Científica Ferreira Penna (ECFPn), localizada na FLONA Caxiuanã (1°42'30"S -51°31'45"W), Melgaço -Pará, realizado por ocasião da primeira chamada do Programa de Residência em Estudos Amazônicos, iniciativa do Museu Paraense Emílio Goeldi. Musgos e Hepáticas foram amostrados nos ecossistemas de mata de terra firme, várzea, igapó, capoeiras e campina, e analisadas quanto à composição, riqueza e diversidade. Foram registradas 1081 ocorrências de briófitas de 120 espécies, sendo 79 hepáticas e 41 musgos, das quais oito hepáticas são novas referências para o Estado do Pará. As famílias de maior riqueza e assiduidade foram Lejeuneaceae (58 spp.), Calymperaceae (13 spp.), Sematophyllaceae (9 spp.) e Plagiochilaceae (7 spp.). As comunidades que melhor se fizeram representar foram a epífita (97 espécies/ 565 ocorrências) e a epíxila (65 spp./ 242 ocorr.), seguidas pelas comunidades epífila (27 spp./ 174 ocorr.) e terrícola (15 spp./ 96 ocorr.) e o ecossistema que apresentou maior riqueza e diversidade foi mata de terra firme. Quanto à composição nos substratos inventariados, foi observada uma inversão gradativa na proporção de riqueza entre hepáticas/ musgos, sendo as primeiras fortemente dominantes em folha, moderadamente dominantes em tronco vivo e morto, ao passo que musgos predominaram nos demais. Os resultados obtidos neste inventário, inclusive as novas referências para o Estado, contribuem para o entendimento dos padrões de riqueza e diversidade na Floresta Amazônica e enriquecem a flora conhecida para o Estado do Pará. PALAVRAS-CHAVE:Caxiuanã, Estação Científica Ferreira Penna, musgos, hepáticas, inventário, Floresta Amazônica. Contribution to the taxonomy, ecology and phytogeographical knowledge of Bryophytes from Eastern Amazonia ABSTRACTThis paper presents the floristic survey of Bryophytes from Ferreira Penna Scientific Station (ECFPn), located in the FLONA Caxiuanã (1°42'30"S -51°31'45"W), Melgaço -Pará, that was undertaken in the first stage of the Residence Program in Amazonian Studies, a project of the Museu Paraense Emílio Goeldi. Mosses and liverworts were collected in non-flooded forest (terra firme), flooded forest (várzea and igapó), secondary forest and savanna ecosystems. They were analyzed for composition, richness and diversity. One thousand eighty one occurrences of 120 Bryophytes species (79 liverworts and 41 mosses) were recorded; and among them eight liverworts are new references from the state of Pará. The richest and most frequently encountered families were Lejeuneaceae (58 spp.), Calymperaceae (13 spp.), Sematophyllaceae (9 spp.) and Plagiochilaceae (7 spp.). The most representative communities were the epiphytic (97 species/ 565 occurrences) and epixylic (65 spp./ 242 ocurr.), followed by foliicolous (27 spp./ 174 ocurr.) and terricolous (15 spp./ 96 ocurr.); and the richest and most diverse ecosystem was the terra firme forest. The composition analysis of the surveyed substrates showed a gradual inversion in the richness...

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“…Thus the method adapts the scale of study to the scale of individual plants. The method has been particularly used in saxicolous one-layered communities (Yarranton 1966(Yarranton , 1967a(Yarranton , 1967bBates 1978Bates , 1982 and in terficolous lichen-rich communities (Oksanen 1984b). It is of great general interest and has also been used in vascular vegetation (see Jong et al 1983).…”

Section: Syntaxonomic Approaches In the Classification Of Epigeic Licmentioning

confidence: 99%

Epigeic lichen communities of taiga and tundra regions

1990

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The major physiognomic and ecological categories of the lichen-rich, epigeic communities in the boreal (taiga) and arctic (tundra) zones are defined and their syntaxonomy and ecology in Europe, Asia and North America is reviewed. In the boreal and hemiarctic areas open, dry, acidophytic lichen woodlands are widespread, especially on sandy habitats. Their epigeic lichen synusiae are usually dominated by four fruticose Cladina species, being extremely homogeneous in species composition and structure throughout the boreal zone, while the dominant trees and the other vascular plant flora of the woodlands are geographically more variable. No phytosociological classification system exists that would cover most of these communities over the circumpolar regions. Very similar communities, though much more poorly known, are found on thin soils over Precambrian rock outcrops. Other sites to produce epigeic lichen communities include open sand dunes, treeless heathlands, drier bogs and many seral stages, like those on road banks. Boreal lichen-rich communities on eutrophic soils may be developed in semiarid regions, in particular. In the Arctic, lichens are common in most communities, and the driest ones are regularly lichen-dominated, whether acidophytic or eutrophytic, chionophytic or achionophytic. Detailed syntaxonomic systems for their classification have been developed, especially in Greenland and Scandinavian mountains (in oroarctic zones in the latter regions). The richest fruticose lichen areas are in continental, hemiarctic timberline regions in northern Siberia and Canada. The southern and middle arctic subzones are also characterized by many macrolichens, such as Cetraria cucullata, C. nivalis, Alectoria ochroleuca, and Thamnolia vermicularis, but everywhere also small, crustose lichens are common on soil, such as Rinodina turfacea and Lopadium pezizoideum, which are often overlooked in vegetation analyses. The presence of microlichens and the formation of mosaic micropatterns of soil lichen communities is particularly typical of the northern arctic subzone. The conservation problems of the boreal and arctic lichen communities include overgrazing by reindeer or caribou, which has caused delichenization in some regions, extensive forest and tundra fires, use of heavy transport vehicles in forestry and tundra operations, and, locally, heavy industrial air pollution. 40

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Quantitative Approaches in Bryophyte Ecology

Cited by 21 publications

References 108 publications

Habitat heterogeneity and diversity of bryophytes in campos rupestres

Habitat heterogeneity and diversity of bryophytes in campos rupestres

Contribuição para o conhecimento da taxonomia, ecologia e fitogeografia de Briófitas da Amazônia Oriental

Epigeic lichen communities of taiga and tundra regions

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