Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/224630 |
Resumo: | We examine the effects of forest fragmentation on the structure and composition of tree assemblages within three seasonal and aseasonal forest types of southern Brazil, including evergreen, Araucaria, and deciduous forests. We sampled three southernmost Atlantic Forest landscapes, including the largest continuous forest protected areas within each forest type. Tree assemblages in each forest type were sampled within 10 plots of 0.1 ha in both continuous forests and 10 adjacent forest fragments. All trees within each plot were assigned to trait categories describing their regeneration strategy, vertical stratification, seed-dispersal mode, seed size, and wood density. We detected differences among both forest types and landscape contexts in terms of overall tree species richness, and the density and species richness of different functional groups in terms of regeneration strategy, seed dispersal mode and woody density. Overall, evergreen forest fragments exhibited the largest deviations from continuous forest plots in assemblage structure. Evergreen, Araucaria and deciduous forests diverge in the functional composition of tree floras, particularly in relation to regeneration strategy and stress tolerance. By supporting a more diversified light-demanding and stress-tolerant flora with reduced richness and abundance of shadetolerant, old-growth species, both deciduous and Araucaria forest tree assemblages are more intrinsically resilient to contemporary human-disturbances, including fragmentationinduced edge effects, in terms of species erosion and functional shifts. We suggest that these intrinsic differences in the direction and magnitude of responses to changes in landscape structure between forest types should guide a wide range of conservation strategies in restoring fragmented tropical forest landscapes worldwide. |
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Orihuela, Rodrigo Leonel LozanoPeres, Carlos A.Mendes, GabrielJarenkow, João AndréTabarelli, Marcelo2021-07-28T04:39:33Z20151932-6203http://hdl.handle.net/10183/224630001001056We examine the effects of forest fragmentation on the structure and composition of tree assemblages within three seasonal and aseasonal forest types of southern Brazil, including evergreen, Araucaria, and deciduous forests. We sampled three southernmost Atlantic Forest landscapes, including the largest continuous forest protected areas within each forest type. Tree assemblages in each forest type were sampled within 10 plots of 0.1 ha in both continuous forests and 10 adjacent forest fragments. All trees within each plot were assigned to trait categories describing their regeneration strategy, vertical stratification, seed-dispersal mode, seed size, and wood density. We detected differences among both forest types and landscape contexts in terms of overall tree species richness, and the density and species richness of different functional groups in terms of regeneration strategy, seed dispersal mode and woody density. Overall, evergreen forest fragments exhibited the largest deviations from continuous forest plots in assemblage structure. Evergreen, Araucaria and deciduous forests diverge in the functional composition of tree floras, particularly in relation to regeneration strategy and stress tolerance. By supporting a more diversified light-demanding and stress-tolerant flora with reduced richness and abundance of shadetolerant, old-growth species, both deciduous and Araucaria forest tree assemblages are more intrinsically resilient to contemporary human-disturbances, including fragmentationinduced edge effects, in terms of species erosion and functional shifts. We suggest that these intrinsic differences in the direction and magnitude of responses to changes in landscape structure between forest types should guide a wide range of conservation strategies in restoring fragmented tropical forest landscapes worldwide.application/pdfengPloS one. San Francisco. Vol. 10, no. 8 (Aug. 2015), e0136018, 19 p.AraucariaFloresta tropicalMarkedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradientEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001001056.pdf.txt001001056.pdf.txtExtracted Texttext/plain65600http://www.lume.ufrgs.br/bitstream/10183/224630/2/001001056.pdf.txtf13064350b09d5f76d9570d5c727f3f1MD52ORIGINAL001001056.pdfTexto completo (inglês)application/pdf2252752http://www.lume.ufrgs.br/bitstream/10183/224630/1/001001056.pdf89573ad0810763989e5858f0d339a25bMD5110183/2246302023-09-23 03:35:41.058612oai:www.lume.ufrgs.br:10183/224630Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-09-23T06:35:41Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
title |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
spellingShingle |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient Orihuela, Rodrigo Leonel Lozano Araucaria Floresta tropical |
title_short |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
title_full |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
title_fullStr |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
title_full_unstemmed |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
title_sort |
Markedly divergent tree assemblage responses to tropical forest loss and fragmentation across a strong seasonality gradient |
author |
Orihuela, Rodrigo Leonel Lozano |
author_facet |
Orihuela, Rodrigo Leonel Lozano Peres, Carlos A. Mendes, Gabriel Jarenkow, João André Tabarelli, Marcelo |
author_role |
author |
author2 |
Peres, Carlos A. Mendes, Gabriel Jarenkow, João André Tabarelli, Marcelo |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Orihuela, Rodrigo Leonel Lozano Peres, Carlos A. Mendes, Gabriel Jarenkow, João André Tabarelli, Marcelo |
dc.subject.por.fl_str_mv |
Araucaria Floresta tropical |
topic |
Araucaria Floresta tropical |
description |
We examine the effects of forest fragmentation on the structure and composition of tree assemblages within three seasonal and aseasonal forest types of southern Brazil, including evergreen, Araucaria, and deciduous forests. We sampled three southernmost Atlantic Forest landscapes, including the largest continuous forest protected areas within each forest type. Tree assemblages in each forest type were sampled within 10 plots of 0.1 ha in both continuous forests and 10 adjacent forest fragments. All trees within each plot were assigned to trait categories describing their regeneration strategy, vertical stratification, seed-dispersal mode, seed size, and wood density. We detected differences among both forest types and landscape contexts in terms of overall tree species richness, and the density and species richness of different functional groups in terms of regeneration strategy, seed dispersal mode and woody density. Overall, evergreen forest fragments exhibited the largest deviations from continuous forest plots in assemblage structure. Evergreen, Araucaria and deciduous forests diverge in the functional composition of tree floras, particularly in relation to regeneration strategy and stress tolerance. By supporting a more diversified light-demanding and stress-tolerant flora with reduced richness and abundance of shadetolerant, old-growth species, both deciduous and Araucaria forest tree assemblages are more intrinsically resilient to contemporary human-disturbances, including fragmentationinduced edge effects, in terms of species erosion and functional shifts. We suggest that these intrinsic differences in the direction and magnitude of responses to changes in landscape structure between forest types should guide a wide range of conservation strategies in restoring fragmented tropical forest landscapes worldwide. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015 |
dc.date.accessioned.fl_str_mv |
2021-07-28T04:39:33Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
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http://hdl.handle.net/10183/224630 |
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1932-6203 |
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001001056 |
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url |
http://hdl.handle.net/10183/224630 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
PloS one. San Francisco. Vol. 10, no. 8 (Aug. 2015), e0136018, 19 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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