Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds
Dynamic flow regimes maintain critical connections between main channel and adjacent floodplain habitats that provide fish access to shelter, foraging, and spawning opportunities. Our study advances the understanding of these processes by exploring the importance of coupled longitudinal-lateral conn...
| Autor principal: | Couto, Thiago B. A. |
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| Outros Autores: | Zuanon, Jansen, Olden, Julian D., Ferraz, Gonçalo |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Canadian Journal of Fisheries and Aquatic Sciences
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16980 |
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oai:repositorio:1-16980 |
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oai:repositorio:1-16980 Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds Couto, Thiago B. A. Zuanon, Jansen Olden, Julian D. Ferraz, Gonçalo Channel Connectivity Ecological Modeling Finfish Floodplain Headwater Hydrological Regime Longitudinal Gradient Pond Species Occurrence Tolerance Amazon River Micropus Pisces Dynamic flow regimes maintain critical connections between main channel and adjacent floodplain habitats that provide fish access to shelter, foraging, and spawning opportunities. Our study advances the understanding of these processes by exploring the importance of coupled longitudinal-lateral connectivity for determining species occurrence in headwater streams of the Amazon. Using a multispecies occupancy model, we revealed a clear pattern of species addition in the downstream direction in temporary floodplain ponds, associated with changes in the pool of potential colonists present in the channel and with increasing lateral hydrologic connectivity. Species that are more tolerant of stagnant waters and those able to disperse in shallow habitats (e.g., Anablepsoides micropus) occurred frequently in ponds along the entire longitudinal extent, whereas those species preferring lotic habitats were present only in the most downstream sites. We also observed increasing similarity of pond and channel communities with distance downstream. This study provides insights on the spatial structuring of tropical fish communities in response to flood-induced hydrologic connectivity and further highlights the vulnerability of floodplain fishes to modification in flooding regimes. © 2018, Canadian Science Publishing. All rights reserved. 2020-06-15T21:37:48Z 2020-06-15T21:37:48Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/16980 10.1139/cjfas-2016-0388 en Volume 75, Número 2, Pags. 319-328 Restrito Canadian Journal of Fisheries and Aquatic Sciences |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Channel Connectivity Ecological Modeling Finfish Floodplain Headwater Hydrological Regime Longitudinal Gradient Pond Species Occurrence Tolerance Amazon River Micropus Pisces |
| spellingShingle |
Channel Connectivity Ecological Modeling Finfish Floodplain Headwater Hydrological Regime Longitudinal Gradient Pond Species Occurrence Tolerance Amazon River Micropus Pisces Couto, Thiago B. A. Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| topic_facet |
Channel Connectivity Ecological Modeling Finfish Floodplain Headwater Hydrological Regime Longitudinal Gradient Pond Species Occurrence Tolerance Amazon River Micropus Pisces |
| description |
Dynamic flow regimes maintain critical connections between main channel and adjacent floodplain habitats that provide fish access to shelter, foraging, and spawning opportunities. Our study advances the understanding of these processes by exploring the importance of coupled longitudinal-lateral connectivity for determining species occurrence in headwater streams of the Amazon. Using a multispecies occupancy model, we revealed a clear pattern of species addition in the downstream direction in temporary floodplain ponds, associated with changes in the pool of potential colonists present in the channel and with increasing lateral hydrologic connectivity. Species that are more tolerant of stagnant waters and those able to disperse in shallow habitats (e.g., Anablepsoides micropus) occurred frequently in ponds along the entire longitudinal extent, whereas those species preferring lotic habitats were present only in the most downstream sites. We also observed increasing similarity of pond and channel communities with distance downstream. This study provides insights on the spatial structuring of tropical fish communities in response to flood-induced hydrologic connectivity and further highlights the vulnerability of floodplain fishes to modification in flooding regimes. © 2018, Canadian Science Publishing. All rights reserved. |
| format |
Artigo |
| author |
Couto, Thiago B. A. |
| author2 |
Zuanon, Jansen Olden, Julian D. Ferraz, Gonçalo |
| author2Str |
Zuanon, Jansen Olden, Julian D. Ferraz, Gonçalo |
| title |
Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| title_short |
Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| title_full |
Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| title_fullStr |
Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| title_full_unstemmed |
Longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| title_sort |
longitudinal variability in lateral hydrologic connectivity shapes fish occurrence in temporary floodplain ponds |
| publisher |
Canadian Journal of Fisheries and Aquatic Sciences |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16980 |
| _version_ |
1787141481894510592 |
| score |
11.755432 |