What happens in the darkness? Seasonal variations in tropical benthic fish assemblages
Studies of fish assemblages have demonstrated that the main channels of rivers contain ichthyofauna adapted to this environment. However, information regarding the effects of temporal and spatial variations on this ichthyofauna is scarce. Using data from benthic fish assemblages in a major tributary...
| Autor principal: | Duarte, Cleber |
|---|---|
| Outros Autores: | Espírito-Santo, Helder Mateus Viana, Zuanon, Jansen, Py-daniel, Lúcia Rapp, Deus, C. P. |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Marine and Freshwater Research
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16510 |
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oai:repositorio:1-16510 |
|---|---|
| recordtype |
dspace |
| spelling |
oai:repositorio:1-16510 What happens in the darkness? Seasonal variations in tropical benthic fish assemblages Duarte, Cleber Espírito-Santo, Helder Mateus Viana Zuanon, Jansen Py-daniel, Lúcia Rapp Deus, C. P. Studies of fish assemblages have demonstrated that the main channels of rivers contain ichthyofauna adapted to this environment. However, information regarding the effects of temporal and spatial variations on this ichthyofauna is scarce. Using data from benthic fish assemblages in a major tributary of the Amazon basin collected during two consecutive receding and two rising water seasons, we tested the hypothesis that there are marked variations in community composition between the receding and rising water seasons. An asymmetry in predictability was detected among samples from the receding and rising seasons. Predictability in terms of species composition was higher for receding than rising seasons. The continual disassembly and reassembly cycles (due to dispersal) of local communities across a spatially heterogeneous landscape could explain this difference. Depth and dissolved oxygen affected the distribution of some benthic fish species during the rising seasons. This study highlights the important contribution of marginal wetlands to the benthic ichthyofauna inhabiting the main channel of the Purus River, as well as other major Amazonian rivers. © 2020 CSIRO. 2020-06-15T21:35:06Z 2020-06-15T21:35:06Z 2020 Artigo https://repositorio.inpa.gov.br/handle/1/16510 10.1071/MF19038 en Volume 71, Número 4, Pags. 419-431 Restrito Marine and Freshwater Research |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| description |
Studies of fish assemblages have demonstrated that the main channels of rivers contain ichthyofauna adapted to this environment. However, information regarding the effects of temporal and spatial variations on this ichthyofauna is scarce. Using data from benthic fish assemblages in a major tributary of the Amazon basin collected during two consecutive receding and two rising water seasons, we tested the hypothesis that there are marked variations in community composition between the receding and rising water seasons. An asymmetry in predictability was detected among samples from the receding and rising seasons. Predictability in terms of species composition was higher for receding than rising seasons. The continual disassembly and reassembly cycles (due to dispersal) of local communities across a spatially heterogeneous landscape could explain this difference. Depth and dissolved oxygen affected the distribution of some benthic fish species during the rising seasons. This study highlights the important contribution of marginal wetlands to the benthic ichthyofauna inhabiting the main channel of the Purus River, as well as other major Amazonian rivers. © 2020 CSIRO. |
| format |
Artigo |
| author |
Duarte, Cleber |
| spellingShingle |
Duarte, Cleber What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| author2 |
Espírito-Santo, Helder Mateus Viana Zuanon, Jansen Py-daniel, Lúcia Rapp Deus, C. P. |
| author2Str |
Espírito-Santo, Helder Mateus Viana Zuanon, Jansen Py-daniel, Lúcia Rapp Deus, C. P. |
| title |
What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| title_short |
What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| title_full |
What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| title_fullStr |
What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| title_full_unstemmed |
What happens in the darkness? Seasonal variations in tropical benthic fish assemblages |
| title_sort |
what happens in the darkness? seasonal variations in tropical benthic fish assemblages |
| publisher |
Marine and Freshwater Research |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16510 |
| _version_ |
1787143923049693184 |
| score |
11.755432 |