Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon
Changes in environmental characteristics can affect habitat use by birds, impacting the number of individuals, number of species, and changing species composition and functional structure of assemblages. Metrics that evaluate the functional structure of biological assemblages constitute a complement...
| Autor principal: | OLIVEIRA, Jocieli de |
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| Outros Autores: | ALMEIDA, Sara Miranda, FLORÊNCIO, Fernando do Prado, PINHO, João Batista de, OLIVEIRA, Dalci Mauricio Miranda de, SANTOS, Raphael Ligeiro Barroso, RODRIGUES, Domingos de Jesus |
| Grau: | Artigo |
| Idioma: | eng |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia
2020
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| Acesso em linha: |
http://repositorio.ufpa.br:8080/jspui/handle/2011/12352 https://doi.org/10.1590/1809-4392201803941 |
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ir-2011-123522020-03-05T05:48:00Z Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon Estrutura ambiental afeta a diversidade taxonômica, mas não a estrutura funcional de aves de sub-bosque no sudoeste da Amazônia brasileira OLIVEIRA, Jocieli de ALMEIDA, Sara Miranda FLORÊNCIO, Fernando do Prado PINHO, João Batista de OLIVEIRA, Dalci Mauricio Miranda de SANTOS, Raphael Ligeiro Barroso RODRIGUES, Domingos de Jesus Aves Estrutura de assembleias Habitat Riqueza funcional Assemblage structure Functional richness Changes in environmental characteristics can affect habitat use by birds, impacting the number of individuals, number of species, and changing species composition and functional structure of assemblages. Metrics that evaluate the functional structure of biological assemblages constitute a complementary tool to the traditional taxonomic approach, because they quantify the differences between species by means of functional traits. We assessed the effect of environmental characteristics on the taxonomic diversity (species richness, species composition and number of individuals) and functional structure (functional richness, functional evenness, Rao’s functional diversity, and community-weighted mean traits) of bird assemblages in northern Mato Grosso state, in the southwestern Brazilian Amazon. We sampled birds in 32 plots. At each plot birds were captured using mist nets, and eight environmental variables were measured: canopy openness, leaf litter, elevation, number of trees in three classes of DBH, soil clay content, and distance to nearest stream. To evaluate functional structure, we measured seven morphological traits from individuals of each bird species. Habitat variables had a significant effect on taxonomic diversity. However, the general functional structure was not affected. Elevation and distance to nearest stream were the main variables driving changes in taxonomic diversity and had a minor effect on functional richness. The other metrics of functional structure were not significantly affected by the set of environmental variables. Our results suggest that the sampled bird assemblages exhibit some functional tolerance (redundancy) to small-scale environmental variation, implying certain resilience to ecosystem modification. CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico Mudanças nas características ambientais podem influenciar o uso do habitat por aves, afetando o número de indivíduos, a riqueza de espécies e alterando a composição de espécies e estrutura funcional das assembleias. Medidas que avaliam a estrutura funcional de assembléias biológicas constituem uma ferramenta complementar à abordagem taxonômica, pois quantificam as diferenças entre as espécies através de seus atributos funcionais. Nós acessamos o efeito de variáveis ambientais sobre a diversidade taxonômica (riqueza, composição de espécies e número de indivíduos) e estrutura funcional (riqueza funcional, equabilidade funcional, diversidade funcional e média dos atributos ponderada pelas abundâncias) de assembleias de aves no norte do estado de Mato Grosso. Amostramos aves em 32 parcelas. Em cada parcela as aves foram capturadas usando redes de neblina e oito variáveis ambientais foram mensuradas: abertura de dossel, volume de serapilheira, elevação, número de árvores em três classe de DAP, teor de argila no solo e distância ao riacho mais próximo. Para avaliar a estrutura funcional nós tomamos sete medidas morfológicas de cada espécie de aves. Encontramos um efeito significativo das variáveis do habitat sobre a diversidade taxonômica, porém, a estrutura funcional, de maneira geral, não foi afetada. Elevação e distância ao riacho mais próximo foram as variáveis que direcionaram as mudanças na diversidade taxonômica e tiveram um pequeno efeito na riqueza funcional. As demais métricas de estrutura funcional não foram afetadas significativamente pelo conjunto de variáveis ambientais. Nossos resultados sugerem que a assembleia estudada exibe certa tolerância funcional (redundância) à variação ambiental em pequena escala, implicando em alguma resiliência à modificação do ecossistema. ALMEIDA, S. M.; PINHO, J. B. Universidade Federal do Pará 2020-03-04T13:49:45Z 2020-03-04T13:49:45Z 2019-09 Artigo de Periódico OLIVEIRA, Jocieli de et al. Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon. Acta Amazonica, Manaus, v. 49, n. 3, p. 232-241, July/Sept. 2019. DOI: https://doi.org/10.1590/1809-4392201803941. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/12352. Acesso em:. 1809-4392 http://repositorio.ufpa.br:8080/jspui/handle/2011/12352 https://doi.org/10.1590/1809-4392201803941 eng Acta Amazonica Acesso Aberto application/pdf Instituto Nacional de Pesquisas da Amazônia Brasil INPA http://ref.scielo.org/fgypxt |
| institution |
Repositório Institucional - Universidade Federal do Pará |
| collection |
RI-UFPA |
| language |
eng |
| topic |
Aves Estrutura de assembleias Habitat Riqueza funcional Assemblage structure Functional richness |
| spellingShingle |
Aves Estrutura de assembleias Habitat Riqueza funcional Assemblage structure Functional richness OLIVEIRA, Jocieli de Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| topic_facet |
Aves Estrutura de assembleias Habitat Riqueza funcional Assemblage structure Functional richness |
| description |
Changes in environmental characteristics can affect habitat use by birds, impacting the number of individuals, number of species, and changing species composition and functional structure of assemblages. Metrics that evaluate the functional structure of biological assemblages constitute a complementary tool to the traditional taxonomic approach, because they quantify the differences between species by means of functional traits. We assessed the effect of environmental characteristics on the taxonomic diversity (species richness, species composition and number of individuals) and functional structure (functional richness, functional evenness, Rao’s functional diversity, and community-weighted mean traits) of bird assemblages in northern Mato Grosso state, in the southwestern Brazilian Amazon. We sampled birds in 32 plots. At each plot birds were captured using mist nets, and eight environmental variables were measured: canopy openness, leaf litter, elevation, number of trees in three classes of DBH, soil clay content, and distance to nearest stream. To evaluate functional structure, we measured seven morphological traits from individuals of each bird species. Habitat variables had a significant effect on taxonomic diversity. However, the general functional structure was not affected. Elevation and distance to nearest stream were the main variables driving changes in taxonomic diversity and had a minor effect on functional richness. The other metrics of functional structure were not significantly affected by the set of environmental variables. Our results suggest that the sampled bird assemblages exhibit some functional tolerance (redundancy) to small-scale environmental variation, implying certain resilience to ecosystem modification. |
| format |
Artigo |
| author |
OLIVEIRA, Jocieli de |
| author2 |
ALMEIDA, Sara Miranda FLORÊNCIO, Fernando do Prado PINHO, João Batista de OLIVEIRA, Dalci Mauricio Miranda de SANTOS, Raphael Ligeiro Barroso RODRIGUES, Domingos de Jesus |
| author2Str |
ALMEIDA, Sara Miranda FLORÊNCIO, Fernando do Prado PINHO, João Batista de OLIVEIRA, Dalci Mauricio Miranda de SANTOS, Raphael Ligeiro Barroso RODRIGUES, Domingos de Jesus |
| title |
Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| title_short |
Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| title_full |
Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| title_fullStr |
Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| title_full_unstemmed |
Environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern Brazilian Amazon |
| title_sort |
environmental structure affects taxonomic diversity but not functional structure of understory birds in the southwestern brazilian amazon |
| publisher |
Instituto Nacional de Pesquisas da Amazônia |
| publishDate |
2020 |
| url |
http://repositorio.ufpa.br:8080/jspui/handle/2011/12352 https://doi.org/10.1590/1809-4392201803941 |
| _version_ |
1787148416834338816 |
| score |
11.674684 |