## Resumo

The structure of tree communities in tropical forests depends on environmental filters and biotic interactions such as competition and facilitation. Many ecotone forests in Northern Amazonia are intriguingly populated by tree assemblages characterized by distinct abundances of a single species, Peltogyne gracilipes (Leguminosae). It is unclear whether this pattern solely reflects environmental filters or also antagonistic interactions among species with similar habitat requirements. The aim of this study was to determine the response of species richness and composition to environmental filters, and analyze the role of P. gracilipes in structuring tree communities in ecotone forest areas of the Northern Brazilian Amazonia. We sampled 129 permanent plots along a hydro-edaphic gradient. All arboreal individuals with stem diameter ≥10 cm were measured and identified. Multiple regressions were performed to test the effects of environmental filters, and abundance of P. gracilipes on the tree species richness and composition. Species richness and composition responded to the same filters which, in turn, affected species composition directly and indirectly, through the abundance of P. gracilipes. Our results indicate that both abiotic filters and biotic interactions shape the studied tree communities. P. gracilipes can be considered an indicator species of hydro-edaphic conditions, but also is itself a driver of tree community structure.

## Citação

Silva WR, Pequeno PACL, Farias HLS, Melo VF, Villacorta CDA, Carvalho LCS, Perdiz RO, Citó AC, Barbosa RI (2021). “Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia.” Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais, 16(2), 229-244. doi: 10.46357/bcnaturais.v16i2.434 (URL: https://doi.org/10.46357/bcnaturais.v16i2.434).

### Formato .bib:

@Article{Silvaetal2021,
author = {Wiliamar Rodrigues Silva and Pedro Aurélio Costa Lima Pequeno and Hugo Leonardo Sousa Farias and Valdinar Ferreira Melo and Carlos Darwin Angulo Villacorta and Lidiany Camila Silva Carvalho and Ricardo Oliveira Perdiz and Arthur Camur\cca Citó and Reinaldo Imbrozio Barbosa},
title = {{Environmental filters and biotic interactions drive species richness and composition in ecotone forests of the northern Brazilian Amazonia}},
journal = {Boletim do Museu Paraense Emílio Goeldi - Ciências Naturais},
year = {2021},
volume = {16},
number = {2},
pages = {229--244},
month = {sep},
abstract = {The structure of tree communities in tropical forests depends on environmental filters and biotic interactions such as competition and facilitation. Many ecotone forests in Northern Amazonia are intriguingly populated by tree assemblages characterized by distinct abundances of a single species, Peltogyne gracilipes (Leguminosae). It is unclear whether this pattern solely reflects environmental filters or also antagonistic interactions among species with similar habitat requirements. The aim of this study was to determine the response of species richness and composition to environmental filters, and analyze the role of P. gracilipes in structuring tree communities in ecotone forest areas of the Northern Brazilian Amazonia. We sampled 129 permanent plots along a hydro-edaphic gradient. All arboreal individuals with stem diameter ≥10 cm were measured and identified. Multiple regressions were performed to test the effects of environmental filters, and abundance of P. gracilipes on the tree species richness and composition. Species richness and composition responded to the same filters which, in turn, affected species composition directly and indirectly, through the abundance of P. gracilipes. Our results indicate that both abiotic filters and biotic interactions shape the studied tree communities. P. gracilipes can be considered an indicator species of hydro-edaphic conditions, but also is itself a driver of tree community structure.},
doi = {https://doi.org/10.46357/bcnaturais.v16i2.434},
}

Posted on:
September 7, 2021
Length: