Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil
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 patt...
| Autor principal: | Zuquim, Gabriela |
|---|---|
| Outros Autores: | Tuomisto, Hanna, Costa, Flávia Regina Capellotto, Prado, J., Magnusson, William Ernest, Pimentel, Tânia Pena, Braga-Neto, Ricardo, Figueiredo, Fernando Oliveira Gouvêa |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Biotropica
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17975 |
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oai:repositorio:1-17975 |
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dspace |
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oai:repositorio:1-17975 Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil Zuquim, Gabriela Tuomisto, Hanna Costa, Flávia Regina Capellotto Prado, J. Magnusson, William Ernest Pimentel, Tânia Pena Braga-Neto, Ricardo Figueiredo, Fernando Oliveira Gouvêa Community Composition Conservation Planning Data Set Dispersal Ecological Modeling Environmental Factor Environmental Gradient Fern Heterogeneity Landscape Plant Community Population Distribution Pteridophyte Species Conservations Tropical Forest Understory Vegetation Structure Amazonas Brasil Filicophyta Lycopodiophyta Pteridophyta 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. © 2012 by The Association for Tropical Biology and Conservation. 2020-06-15T21:50:36Z 2020-06-15T21:50:36Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/17975 10.1111/j.1744-7429.2012.00880.x en Volume 44, Número 6, Pags. 752-762 Restrito Biotropica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Community Composition Conservation Planning Data Set Dispersal Ecological Modeling Environmental Factor Environmental Gradient Fern Heterogeneity Landscape Plant Community Population Distribution Pteridophyte Species Conservations Tropical Forest Understory Vegetation Structure Amazonas Brasil Filicophyta Lycopodiophyta Pteridophyta |
| spellingShingle |
Community Composition Conservation Planning Data Set Dispersal Ecological Modeling Environmental Factor Environmental Gradient Fern Heterogeneity Landscape Plant Community Population Distribution Pteridophyte Species Conservations Tropical Forest Understory Vegetation Structure Amazonas Brasil Filicophyta Lycopodiophyta Pteridophyta Zuquim, Gabriela Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| topic_facet |
Community Composition Conservation Planning Data Set Dispersal Ecological Modeling Environmental Factor Environmental Gradient Fern Heterogeneity Landscape Plant Community Population Distribution Pteridophyte Species Conservations Tropical Forest Understory Vegetation Structure Amazonas Brasil Filicophyta Lycopodiophyta Pteridophyta |
| description |
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. © 2012 by The Association for Tropical Biology and Conservation. |
| format |
Artigo |
| author |
Zuquim, Gabriela |
| author2 |
Tuomisto, Hanna Costa, Flávia Regina Capellotto Prado, J. Magnusson, William Ernest Pimentel, Tânia Pena Braga-Neto, Ricardo Figueiredo, Fernando Oliveira Gouvêa |
| author2Str |
Tuomisto, Hanna Costa, Flávia Regina Capellotto Prado, J. Magnusson, William Ernest Pimentel, Tânia Pena Braga-Neto, Ricardo Figueiredo, Fernando Oliveira Gouvêa |
| title |
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| title_short |
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| title_full |
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| title_fullStr |
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| title_full_unstemmed |
Broad Scale Distribution of Ferns and Lycophytes along Environmental Gradients in Central and Northern Amazonia, Brazil |
| title_sort |
broad scale distribution of ferns and lycophytes along environmental gradients in central and northern amazonia, brazil |
| publisher |
Biotropica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17975 |
| _version_ |
1787144903077134336 |
| score |
11.755432 |