Memorias de investigación
Artículos en revistas:
Response of fish communities in rivers subjected to a high sediment load
Año:2017
Áreas de investigación
  • Ciencias de la tierra,
  • Ingeniería civil y arquitectura
Datos
Descripción
Erosion and sediment yield are a significant problem in the Guadalquivir River basin. Such phenomenaare largely driven by a land use devoted to intensive cultivation of olive trees, with a large socioeconomicinfluence in Andalusia. This sediment overload in rivers causes serious impacts on all fluvial ecosystemcomponents.In this study we assess the chronic effect of sediment yield on fish communities at 104 river sites locatedin two different sub-catchments ? the Bembézar and Guadajoz rivers ? both with different lithologicalcomposition and erosion rates. Sediment yield was estimated using a semi-quantitative Factorial ScoreModel (FSM), developed specifically for Spanish rivers. The fish populations of both basins were evaluatedin composition and abundances by the study of Fernández-Delgado et al., 2014. The influence of sedimentyield on the fish community was analyzed using General Additive Models.The sediment yield was higher in the Guadajoz basin (921 T/Km2 per year) than in Bembézar(701 T/Km2 per year). In the former, fish communities were poorer in both fish density and diversity,with Luciobarbus sclateri as the only substantially present species and a significant relationship betweensediment yield and load, and fish density. In contrast, in the Bembézar basin, sediment yield was cor-related with total fish density, including Luciobarbus sclateri, Pseudochondrostoma willkommii, Cobitispaludica, Iberochondrostoma lemmingii, Anaecypris hispanica, and Cyprinus carpio. Intermediate values ofsediment yield led to maximum densities, while those higher decreased the density of these species.
Internacional
Si
JCR del ISI
Si
Título de la revista
Limnologica - Ecology and Management of Inland Waters
ISSN
0075-9511
Factor de impacto JCR
1,427
Información de impacto
Volumen
62
DOI
10.1016/j.limno.2016.04.002
Número de revista
Desde la página
142
Hasta la página
150
Mes
SIN MES
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Sistemas y Recursos Naturales