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Species richness and functional structure of fish assemblages in three freshwater habitats: effects of environmental factors and management

Queiroz‐Sousa, Jamile ; Keith, Sally A. ; David, Gianmarco S. ; Brandão, Heleno ; Nobile, André B. ; Paes, Jaciara V. K. ; Souto, Ana C. ; Lima, Felipe P. ; Silva, Reinaldo J. ; Henry, Raoul ; Richardson, Katherine

Journal of fish biology, 2019-10, Vol.95 (4), p.1125-1136 [Periódico revisado por pares]

Oxford, UK: Blackwell Publishing Ltd

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Título:
Species richness and functional structure of fish assemblages in three freshwater habitats: effects of environmental factors and management
Autor: Queiroz‐Sousa, Jamile ; Keith, Sally A. ; David, Gianmarco S. ; Brandão, Heleno ; Nobile, André B. ; Paes, Jaciara V. K. ; Souto, Ana C. ; Lima, Felipe P. ; Silva, Reinaldo J. ; Henry, Raoul ; Richardson, Katherine
Assuntos: Abundance ; Animals ; Aquatic habitats ; Biodiversity ; Brazil ; Detritivores ; Detritus feeders ; Environmental conditions ; Environmental effects ; Environmental factors ; Environmental management ; Fish ; Fishes - classification ; Fishes - physiology ; Fresh Water ; Freshwater ; Freshwater environments ; Freshwater fish ; Freshwater fishes ; Geographical distribution ; Herbivores ; Inland water environment ; Introduced fish ; Introduced Species ; mixed effects models ; Multidimensional scaling ; nutrients ; reservoir ; Reservoirs ; Scaling ; sedimentation ; Species diversity ; Species richness ; trophic level
É parte de: Journal of fish biology, 2019-10, Vol.95 (4), p.1125-1136
Descrição: In this study, the inverted trophic hypothesis was tested in the freshwater fish communities of a reservoir. The distribution of fish species in three freshwater habitats in the Jurumirim Reservoir, Brazil, was examined using both species richness and the relative proportions of different trophic groups. These groups were used as a proxy for functional structure in an attempt to test the ability of these measures to assess fish diversity. Assemblage structures were first described using non‐metric multidimensional scaling (NMDS). The influence of environmental conditions for multiple fish assemblage response variables (richness, total abundance and abundance per trophic group) was tested using generalised linear mixed models (GLMM). The metric typically employed to describe diversity; that is, species richness, was not related to environmental conditions. However, absolute species abundance was relatively well explained with up to 54% of the variation in the observed data accounted for. Differences in the dominance of trophic groups were most apparent in response to the presence of introduced fish species: the iliophagous and piscivorous trophic groups were positively associated, while detritivores and herbivores were negatively associated, with the alien species. This suggests that monitoring functional diversity might be more valuable than species diversity for assessing effects of disturbances and managements policies on the fish community.
Editor: Oxford, UK: Blackwell Publishing Ltd
Idioma: Inglês

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Species richness and functional structure of fish assemblages in three freshwater habitats: effects of environmental factors and management

Queiroz‐Sousa, Jamile ; Keith, Sally A. ; David, Gianmarco S. ; Brandão, Heleno ; Nobile, André B. ; Paes, Jaciara V. K. ; Souto, Ana C. ; Lima, Felipe P. ; Silva, Reinaldo J. ; Henry, Raoul ; Richardson, Katherine

Oxford, UK: Blackwell Publishing Ltd

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