Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment
1. The species composition of stream fish assemblages changes across the longitudinal fluvial gradient of large river basins. These changes may reflect both zonation in species distributions and environmental filtering of fish traits as stream environments change from the uplands to the lowlands of large catchments. Previous research has shown that taxonomic diversity generally increases in larger, lowland streams, and the River Continuum Concept, the River Habitat Template and other frameworks have provided expectations for what functional groups of fishes should predominate in certain stream types. However, studies addressing the functional trait composition of fish assemblages across large regions are lacking, particularly in tropical river basins. 2. We examined functional trait-environment relationships and functional diversity of stream fish assemblages in the Río Grijalva Basin in southern Mexico. Traits linked to feeding, locomotion and life history strategy were measured in fishes from streams throughout the catchment, from highland headwaters to broad, lowland streams. Relationships between functional traits and environmental variables at local and landscape scales were examined using multivariate ordination, and the convex hull volume of trait space occupied by fish assemblages was calculated as a measure of functional diversity. 3. Although there were a few exceptions, functional diversity of assemblages increased with species richness along the gradient from uplands to lowlands within the Grijalva Basin. Traits related to swimming, habitat preference and food resource use were associated with both local (e.g. substratum type, pool availability) and landscape-scale (e.g. forest cover) environmental variables.
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Peces de agua dulce Variables ambientales Ecomorfología Artfrosur Peces de agua dulce Variables ambientales Ecomorfología Artfrosur Pease, Allison A. 15352 González Díaz, Alfonso Ángel Doctor autor/a 8677 Rodiles Hernández, María del Rocío 1956- Doctora autor/a 5451 Winemiller, Kirk O. autor/a 15145 Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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1. The species composition of stream fish assemblages changes across the longitudinal fluvial gradient of large river basins. These changes may reflect both zonation in species distributions and environmental filtering of fish traits as stream environments change from the uplands to the lowlands of large catchments. Previous research has shown that taxonomic diversity generally increases in larger, lowland streams, and the River Continuum Concept, the River Habitat Template and other frameworks have provided expectations for what functional groups of fishes should predominate in certain stream types. However, studies addressing the functional trait composition of fish assemblages across large regions are lacking, particularly in tropical river basins. 2. We examined functional trait-environment relationships and functional diversity of stream fish assemblages in the Río Grijalva Basin in southern Mexico. Traits linked to feeding, locomotion and life history strategy were measured in fishes from streams throughout the catchment, from highland headwaters to broad, lowland streams. Relationships between functional traits and environmental variables at local and landscape scales were examined using multivariate ordination, and the convex hull volume of trait space occupied by fish assemblages was calculated as a measure of functional diversity. 3. Although there were a few exceptions, functional diversity of assemblages increased with species richness along the gradient from uplands to lowlands within the Grijalva Basin. Traits related to swimming, habitat preference and food resource use were associated with both local (e.g. substratum type, pool availability) and landscape-scale (e.g. forest cover) environmental variables. |
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Peces de agua dulce Variables ambientales Ecomorfología Artfrosur |
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Pease, Allison A. 15352 González Díaz, Alfonso Ángel Doctor autor/a 8677 Rodiles Hernández, María del Rocío 1956- Doctora autor/a 5451 Winemiller, Kirk O. autor/a 15145 |
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Pease, Allison A. 15352 González Díaz, Alfonso Ángel Doctor autor/a 8677 Rodiles Hernández, María del Rocío 1956- Doctora autor/a 5451 Winemiller, Kirk O. autor/a 15145 |
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Pease, Allison A. 15352 |
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Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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Functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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functional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment |
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AT peaseallisona15352 functionaldiversityandtraitenvironmentrelationshipsofstreamfishassemblagesinalargetropicalcatchment AT gonzalezdiazalfonsoangeldoctorautora8677 functionaldiversityandtraitenvironmentrelationshipsofstreamfishassemblagesinalargetropicalcatchment AT rodileshernandezmariadelrocio1956doctoraautora5451 functionaldiversityandtraitenvironmentrelationshipsofstreamfishassemblagesinalargetropicalcatchment AT winemillerkirkoautora15145 functionaldiversityandtraitenvironmentrelationshipsofstreamfishassemblagesinalargetropicalcatchment |
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KOHA-OAI-ECOSUR:215942024-03-12T12:59:07ZFunctional diversity and trait-environment relationships of stream fish assemblages in a large tropical catchment Pease, Allison A. 15352 González Díaz, Alfonso Ángel Doctor autor/a 8677 Rodiles Hernández, María del Rocío 1956- Doctora autor/a 5451 Winemiller, Kirk O. autor/a 15145 texteng1. The species composition of stream fish assemblages changes across the longitudinal fluvial gradient of large river basins. These changes may reflect both zonation in species distributions and environmental filtering of fish traits as stream environments change from the uplands to the lowlands of large catchments. Previous research has shown that taxonomic diversity generally increases in larger, lowland streams, and the River Continuum Concept, the River Habitat Template and other frameworks have provided expectations for what functional groups of fishes should predominate in certain stream types. However, studies addressing the functional trait composition of fish assemblages across large regions are lacking, particularly in tropical river basins. 2. We examined functional trait-environment relationships and functional diversity of stream fish assemblages in the Río Grijalva Basin in southern Mexico. Traits linked to feeding, locomotion and life history strategy were measured in fishes from streams throughout the catchment, from highland headwaters to broad, lowland streams. Relationships between functional traits and environmental variables at local and landscape scales were examined using multivariate ordination, and the convex hull volume of trait space occupied by fish assemblages was calculated as a measure of functional diversity. 3. Although there were a few exceptions, functional diversity of assemblages increased with species richness along the gradient from uplands to lowlands within the Grijalva Basin. Traits related to swimming, habitat preference and food resource use were associated with both local (e.g. substratum type, pool availability) and landscape-scale (e.g. forest cover) environmental variables.4. Along with taxonomic structure and diversity, the functional composition of fish assemblages changed across the longitudinal fluvial gradient of the basin. Trait-environment relationships documented in this study partially confirmed theoretical expectations and revealed patterns that may help in developing a better understanding of general functional responses of fish assemblages to environmental change.1. The species composition of stream fish assemblages changes across the longitudinal fluvial gradient of large river basins. These changes may reflect both zonation in species distributions and environmental filtering of fish traits as stream environments change from the uplands to the lowlands of large catchments. Previous research has shown that taxonomic diversity generally increases in larger, lowland streams, and the River Continuum Concept, the River Habitat Template and other frameworks have provided expectations for what functional groups of fishes should predominate in certain stream types. However, studies addressing the functional trait composition of fish assemblages across large regions are lacking, particularly in tropical river basins. 2. We examined functional trait-environment relationships and functional diversity of stream fish assemblages in the Río Grijalva Basin in southern Mexico. Traits linked to feeding, locomotion and life history strategy were measured in fishes from streams throughout the catchment, from highland headwaters to broad, lowland streams. Relationships between functional traits and environmental variables at local and landscape scales were examined using multivariate ordination, and the convex hull volume of trait space occupied by fish assemblages was calculated as a measure of functional diversity. 3. Although there were a few exceptions, functional diversity of assemblages increased with species richness along the gradient from uplands to lowlands within the Grijalva Basin. Traits related to swimming, habitat preference and food resource use were associated with both local (e.g. substratum type, pool availability) and landscape-scale (e.g. forest cover) environmental variables.4. Along with taxonomic structure and diversity, the functional composition of fish assemblages changed across the longitudinal fluvial gradient of the basin. Trait-environment relationships documented in this study partially confirmed theoretical expectations and revealed patterns that may help in developing a better understanding of general functional responses of fish assemblages to environmental change.Adobe Acrobat profesional 6.0 o superiorPeces de agua dulceVariables ambientalesEcomorfologíaArtfrosurDisponible en líneaFreshwater BiologyDisponible para usuarios de ECOSUR con su clave de acceso |