Multi-scale assessment of macroinvertebrate richness and composition in Mediterranean-climate rivers
نویسندگان
چکیده
NÚRIA BONADA* , MARIA RIERADEVALL* , HELEN DALLAS , JENNY DAVIS , JENNY DAY , RICARDO FIGUEROA § , VINCENT H. RESH AND NARCÍS PRAT* *Department of Ecology, University of Barcelona, Barcelona, Spain Department of Zoology, University of Cape Town, Cape Town, South Africa Aquatic Ecosystems Research Group, Murdoch University, Murdoch, Western Australia Aquatic Systems Research Unit, Environmental Science Center EULA-Chile, University of Concepcion, Concepción, Chile Department of Environmental Science, Policy & Management, University of California, Berkeley, CA, U.S.A.
منابع مشابه
Predicting River Macroinvertebrate Communities Distributional Shifts under Future Global Change Scenarios in the Spanish Mediterranean Area
Several studies on global change over the next century predict increases in mean air temperatures of between 1°C to 5°C that would affect not only water temperature but also river flow. Climate is the predominant environmental driver of thermal and flow regimes of freshwater ecosystems, determining survival, growth, metabolism, phenology and behaviour as well as biotic interactions of aquatic f...
متن کاملFactors Affecting Macroinvertebrate Richness and Diversity in Portuguese Streams: a Two-Scale Analysis
We analysed the spatial patterns in macroinvertebrate taxon richness and abundance at two scales: sampling unit and basin. We sampled 12 stream sites in three zones of Portugal, differing in climate geomorphology and water chemistry. At a sampling unit scale, substratum organic matter content, depth and the dominant size of substratum particles were correlated with numbers of taxa and individua...
متن کاملWeak Concordance between Fish and Macroinvertebrates in Mediterranean Streams
Although anthropogenic degradation of riverine systems stimulated a multi-taxon bioassessment of their ecological integrity in EU countries, specific responses of different taxonomic groups to human pressure are poorly investigated in Mediterranean rivers. Here, we assess if richness and composition of macroinvertebrate and fish assemblages show concordant variation along a gradient of anthropo...
متن کاملAssessment of fish farm effluents on macroinvertebrates based on biological indices in Tajan River (north Iran)
Impacts of effluent from fish farming activities on fluvial ecosystems lead to deterioration of water quality and changes in the macroinvertebrates assemblage. In this study, the influence of fish farm effluents on water quality and macroinvertebrates communities of Tajan River was investigated to evaluate the suitability of macroinvertebrates based on biological metrics and indices. Benthic...
متن کاملMacroinvertebrate diversity indices: A quantitative bioassessment of ecological health status of an oxbow lake in Eastern India
Aquatic macroinvertebrates, which play a significant role in the food chain of an ecosystem, are used in fresh water quality assessment to identify the environmental stress resulting from a variety of anthropogenic disturbances. Seasonal surveys of macroinvertebrate communities were conducted from April 2013 to March 2014 in Chhariganga oxbow lake of Nadia District of West Bengal, an eastern st...
متن کامل