Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia
We investigated the role of predation and abiotic factors in determining tadpole species distribution and assemblage structure in a savanna area in Central Amazonia, Brazil. We sampled 40 aquatic sites monthly during 2.5 years for tadpoles, predators, and physiochemical characteristics. Most tadpole...
| Autor principal: | Azevedo-Ramos, Cláudia |
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| Outros Autores: | Magnusson, William Ernest, Bayliss, Peter G. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Copeia
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/19227 |
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oai:repositorio:1-19227 |
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dspace |
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oai:repositorio:1-19227 Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia Azevedo-Ramos, Cláudia Magnusson, William Ernest Bayliss, Peter G. Population Structure Predation Savanna Amazonia Brasil We investigated the role of predation and abiotic factors in determining tadpole species distribution and assemblage structure in a savanna area in Central Amazonia, Brazil. We sampled 40 aquatic sites monthly during 2.5 years for tadpoles, predators, and physiochemical characteristics. Most tadpole species showed temporal overlap but spatial segregation and low density, suggesting that interspecific competition among tadpoles is not presently important in this system. Invertebrate predators coexisted with more tadpole species than did fishes, suggesting that predation by fishes strongly influences the composition of tadpole assemblages. Ordination techniques were used to reduce dimensionality to simple vectors, which were then used in multiple regression analyses to search for key factors associated with tadpole assemblage structure. Although species composition was not directly related to abiotic characteristics, path analysis showed that the size and degree of permanence of the water body may indirectly influence species composition by altering predator composition. Tadpole species richness in a water body was not significantly related to abiotic factors or predators. However, predators were the main factor influencing tadpole assemblage composition. Most previous studies on tadpole community dynamics suggested that predators affect alpha (within habitat) diversity, but they did not consider beta diversity (among habitats). Our results showed that predators influenced beta diversity but had little or no effect on variation in alpha diversity. 2020-06-15T22:06:29Z 2020-06-15T22:06:29Z 1999 Artigo https://repositorio.inpa.gov.br/handle/1/19227 10.2307/1447381 en Volume 1, Pags. 22-33 Restrito Copeia |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Population Structure Predation Savanna Amazonia Brasil |
| spellingShingle |
Population Structure Predation Savanna Amazonia Brasil Azevedo-Ramos, Cláudia Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| topic_facet |
Population Structure Predation Savanna Amazonia Brasil |
| description |
We investigated the role of predation and abiotic factors in determining tadpole species distribution and assemblage structure in a savanna area in Central Amazonia, Brazil. We sampled 40 aquatic sites monthly during 2.5 years for tadpoles, predators, and physiochemical characteristics. Most tadpole species showed temporal overlap but spatial segregation and low density, suggesting that interspecific competition among tadpoles is not presently important in this system. Invertebrate predators coexisted with more tadpole species than did fishes, suggesting that predation by fishes strongly influences the composition of tadpole assemblages. Ordination techniques were used to reduce dimensionality to simple vectors, which were then used in multiple regression analyses to search for key factors associated with tadpole assemblage structure. Although species composition was not directly related to abiotic characteristics, path analysis showed that the size and degree of permanence of the water body may indirectly influence species composition by altering predator composition. Tadpole species richness in a water body was not significantly related to abiotic factors or predators. However, predators were the main factor influencing tadpole assemblage composition. Most previous studies on tadpole community dynamics suggested that predators affect alpha (within habitat) diversity, but they did not consider beta diversity (among habitats). Our results showed that predators influenced beta diversity but had little or no effect on variation in alpha diversity. |
| format |
Artigo |
| author |
Azevedo-Ramos, Cláudia |
| author2 |
Magnusson, William Ernest Bayliss, Peter G. |
| author2Str |
Magnusson, William Ernest Bayliss, Peter G. |
| title |
Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| title_short |
Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| title_full |
Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| title_fullStr |
Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| title_full_unstemmed |
Predation as the key factor structuring tadpole assemblages in a savanna area in Central Amazonia |
| title_sort |
predation as the key factor structuring tadpole assemblages in a savanna area in central amazonia |
| publisher |
Copeia |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/19227 |
| _version_ |
1787141334246621184 |
| score |
11.755432 |