What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions?
The relationship between functional and taxonomic diversity is a major issue in ecology. Biodiversity in aquatic environments is strongly influenced by environmental gradients that act as dispersion and niche barriers. Environmental conditions act as filters to select functional traits, but biotic i...
| Autor principal: | Rodrigues-Filho, Carlos Alberto de Sousa |
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| Outros Autores: | Gurgel-Lourenço, Ronaldo César, Lima, Sergio Maia Queiroz, Oliveira, Edson Fontes de, Sánchez-Botero, Jorge Iván |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Environmental Biology of Fishes
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17060 |
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oai:repositorio:1-17060 |
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oai:repositorio:1-17060 What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? Rodrigues-Filho, Carlos Alberto de Sousa Gurgel-Lourenço, Ronaldo César Lima, Sergio Maia Queiroz Oliveira, Edson Fontes de Sánchez-Botero, Jorge Iván Aquatic Environment Biodiversity Caatinga Community Structure Environmental Conditions Environmental Gradient Fish Headwater Spatial Distribution Species Diversity Species Evenness Species Richness Brasil Pisces The relationship between functional and taxonomic diversity is a major issue in ecology. Biodiversity in aquatic environments is strongly influenced by environmental gradients that act as dispersion and niche barriers. Environmental conditions act as filters to select functional traits, but biotic interactions also play a role in assemblage structure. In headwater streams, the relationship between functional and taxonomic diversity remains unclear. In this study we investigated how environmental conditions, taxonomic diversity and biotic interactions influence the spatial distribution of traits and functional diversity in stream fish species. Standardized sampling of fish species was carried out in 50 m sections of 16 streams located in rainforest enclaves in a semiarid region of Brazil (Caatinga biome). The functional diversity indices displayed different responses to the predictor variables used. Functional richness was mainly influenced by environmental conditions, while functional evenness was mostly determined by taxonomic diversity. On the other hand, functional dispersion was explained by a combination of environmental conditions and taxonomic diversity. The spatial distribution of fish species with the same functional traits was random, indicating that biotic interactions are not a strong predictor in these ecosystems. Channel width, pH and substrate were the most important variables in the spatial distribution of the functional traits of the fish species. Our results suggest that the functional structure of fish assemblages in headwater streams depends mainly on environmental conditions and taxonomic diversity. © 2017, Springer Science+Business Media Dordrecht. 2020-06-15T21:38:31Z 2020-06-15T21:38:31Z 2017 Artigo https://repositorio.inpa.gov.br/handle/1/17060 10.1007/s10641-017-0603-4 en Volume 100, Número 9, Pags. 1023-1032 Restrito Environmental Biology of Fishes |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Aquatic Environment Biodiversity Caatinga Community Structure Environmental Conditions Environmental Gradient Fish Headwater Spatial Distribution Species Diversity Species Evenness Species Richness Brasil Pisces |
| spellingShingle |
Aquatic Environment Biodiversity Caatinga Community Structure Environmental Conditions Environmental Gradient Fish Headwater Spatial Distribution Species Diversity Species Evenness Species Richness Brasil Pisces Rodrigues-Filho, Carlos Alberto de Sousa What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| topic_facet |
Aquatic Environment Biodiversity Caatinga Community Structure Environmental Conditions Environmental Gradient Fish Headwater Spatial Distribution Species Diversity Species Evenness Species Richness Brasil Pisces |
| description |
The relationship between functional and taxonomic diversity is a major issue in ecology. Biodiversity in aquatic environments is strongly influenced by environmental gradients that act as dispersion and niche barriers. Environmental conditions act as filters to select functional traits, but biotic interactions also play a role in assemblage structure. In headwater streams, the relationship between functional and taxonomic diversity remains unclear. In this study we investigated how environmental conditions, taxonomic diversity and biotic interactions influence the spatial distribution of traits and functional diversity in stream fish species. Standardized sampling of fish species was carried out in 50 m sections of 16 streams located in rainforest enclaves in a semiarid region of Brazil (Caatinga biome). The functional diversity indices displayed different responses to the predictor variables used. Functional richness was mainly influenced by environmental conditions, while functional evenness was mostly determined by taxonomic diversity. On the other hand, functional dispersion was explained by a combination of environmental conditions and taxonomic diversity. The spatial distribution of fish species with the same functional traits was random, indicating that biotic interactions are not a strong predictor in these ecosystems. Channel width, pH and substrate were the most important variables in the spatial distribution of the functional traits of the fish species. Our results suggest that the functional structure of fish assemblages in headwater streams depends mainly on environmental conditions and taxonomic diversity. © 2017, Springer Science+Business Media Dordrecht. |
| format |
Artigo |
| author |
Rodrigues-Filho, Carlos Alberto de Sousa |
| author2 |
Gurgel-Lourenço, Ronaldo César Lima, Sergio Maia Queiroz Oliveira, Edson Fontes de Sánchez-Botero, Jorge Iván |
| author2Str |
Gurgel-Lourenço, Ronaldo César Lima, Sergio Maia Queiroz Oliveira, Edson Fontes de Sánchez-Botero, Jorge Iván |
| title |
What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| title_short |
What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| title_full |
What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| title_fullStr |
What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| title_full_unstemmed |
What governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| title_sort |
what governs the functional diversity patterns of fishes in the headwater streams of the humid forest enclaves: environmental conditions, taxonomic diversity or biotic interactions? |
| publisher |
Environmental Biology of Fishes |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17060 |
| _version_ |
1787142099484803072 |
| score |
11.755432 |