INVESTIGADORES
GARCIA DE SOUZA Javier Ricardo
artículos
Título:
Impacts of land use and hydrological alterations on water quality and fsh assemblage structure in headwater Pampean streams (Argentina)
Autor/es:
PAREDES DEL PUERTO, JUAN MARTÍN; GARCÍA, IGNACIO DANIEL; MAIZTEGUI, TOMÁS; PARACAMPO, ARIEL HERNÁN; RODRIGUES CAPÍTULO, LEANDRO; GARCIA DE SOUZA, JAVIER RICARDO; MAROÑAS, MIRIAM EDITH; COLAUTTI, DARÍO CÉSAR
Revista:
AQUATIC SCIENCES
Editorial:
BIRKHAUSER VERLAG AG
Referencias:
Lugar: BASEL; Año: 2021 vol. 84 p. 1 - 15
ISSN:
1015-1621
Resumen:
Headwater streams play an essential role in catchment ecosystem processes and are particularly vulnerable to land use degradation and anthropic hydrological alterations. Considering that fsh assemblages are reliable indicators of the ecologicalintegrity of streams, we evaluated the ichthyofauna structure in four headwater Pampean streams located at catchment areaswith contrasting land uses and hydrological man-made alterations. During autumn and spring of 2017 and 2018, fsh assemblages were sampled and physicochemical and water table depth were measured. Specifc richness, abundance, and diversityof fsh assemblages were estimated. The degree of anthropic intervention of drainage networks and wetland coverage wasestimated for each catchment. Statistical analyses assessed the diferences between rural and periurban sampling sites interms of environmental variables and fsh assemblage structure, as well as the relationships between the biotic and abioticvariables. Results showed diferences among headwater streams according to their land uses, hydrological alterations, andfsh assemblage structure, evidencing a combined efect of land use and hydrologic alterations on fsh assemblage. Changesin these communities can refect not only alterations in water quality caused by local land use but also the infuence of thecatchment environmental integrity related to hydrological modifcations and other phenomena that can occur simultaneouslyand at diferent geographical scales.