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Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil

Zuquim, Gabriela ; Tuomisto, Hanna ; Costa, Flávia R.C. ; Prado, Jefferson ; Magnusson, William E. ; Pimentel, Tania ; Braga-Neto, Ricardo ; Figueiredo, Fernando O.G.

Biotropica, 2012-11, Vol.44 (6), p.752-762 [Periódico revisado por pares]

Hoboken, NJ: Blackwell Publishing Ltd

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Título:
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil
Autor: Zuquim, Gabriela ; Tuomisto, Hanna ; Costa, Flávia R.C. ; Prado, Jefferson ; Magnusson, William E. ; Pimentel, Tania ; Braga-Neto, Ricardo ; Figueiredo, Fernando O.G.
Assuntos: Animal, plant and microbial ecology ; Applied ecology ; Biological and medical sciences ; Cations ; Clay soils ; Clays ; Community composition ; Conservation ; Conservation, protection and management of environment and wildlife ; Data processing ; Datasets ; dispersal limitation ; Dry seasons ; environmental factors ; extended dissimilarities ; Ferns ; Forest soils ; Forestry ; Fundamental and applied biological sciences. Psychology ; General aspects ; General forest ecology ; Generalities. Production, biomass. Quality of wood and forest products. General forest ecology ; Landscape ; Ordination ; Plant communities ; Plants ; pteridophytes ; Species ; Species composition ; species turnover ; Sørensen index ; Tropical Biology ; tropical forest ; Tropical forests ; Tropical rain forests ; understory ; Vegetation
É parte de: Biotropica, 2012-11, Vol.44 (6), p.752-762
Notas: Fundação O Boticário
Center for International Mobility
ark:/67375/WNG-2R0QP1LL-R
TABLE S1. List of fern and lycophyte species found in 109 plots in four regions within central and northern Amazonia, Brazil.
ICMBio-Uatumã and ICMBio-Viruá
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Brazilian National Council of Technological and Scientific Development - No. CNPq/PPG7
Instituto Nacional de Pesquisas da Amazônia
istex:EB7ADD6716774D173A714EEE2FB89355A04E8263
Programa de Pesquisas em Biodiversidade
BDFF Project
ArticleID:BTP880
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: Establishing which factors determine species distributions is of major relevance for practical applications such as conservation planning. The Amazonian lowlands exhibit considerable internal heterogeneity that is not apparent in existing vegetation maps. We used ferns as a model group to study patterns in plant species distributions and community composition at regional and landscape scales. Fern species composition and environmental data were collected in 109 plots of 250 × 2 m distributed among four sites in Brazilian Amazonia. Interplot distances varied from 1 to ca 670 km. When floristically heterogeneous datasets were analyzed, the use of an extended Sørensen dissimilarity index rather than the traditional Sørensen index improved model fit and made interpretation of the results easier. Major factors associated with species composition varied among sites, difference in cation concentration was a strong predictor of floristic dissimilarity in those sites with pronounced heterogeneity in cation concentration. Difference in clay content was the most relevant variable in sites with uniform cation concentrations. In every case, environmental differences were invariably better than geographic distances in predicting species compositional differences. Our results are consistent with the ideas that: (1) the relative predictive capacity of the explanatory variables depend on the relative lengths of the observed gradients; and (2) environmental gradients can be hierarchically structured such that gradients occur inside gradients. Therefore, site-specific relationships among variables can mask the bigger picture and make it more difficult to unravel the factors structuring plant communities in Amazonia.
Editor: Hoboken, NJ: Blackwell Publishing Ltd
Idioma: Inglês

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Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil

Zuquim, Gabriela ; Tuomisto, Hanna ; Costa, Flávia R.C. ; Prado, Jefferson ; Magnusson, William E. ; Pimentel, Tania ; Braga-Neto, Ricardo ; Figueiredo, Fernando O.G.

Hoboken, NJ: Blackwell Publishing Ltd

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