2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/23/2018 | 10:00 AM - 10:15 AM | BIODIVERSITY RESPONSES TO MULTIPLE STRESSORS IN THREE EUROPEAN BASINS: BACTERIA, ALGAE, MACROPHYTES, INVERTEBRATES AND FISH | 310 B

BIODIVERSITY RESPONSES TO MULTIPLE STRESSORS IN THREE EUROPEAN BASINS: BACTERIA, ALGAE, MACROPHYTES, INVERTEBRATES AND FISH

Rivers suffer from an important decrease in species diversity due to a variety of stressors related to human activities. The effects on diversity will obviously differ based on the type of stressor and their combination and severity, as well as on the characteristics of the local community composition and tolerance to the stressor. This study presents the results of the analyses of the biodiversity patterns for bacteria, algae, macrophytes, macroinvertebrate and fish communities related to environmental pressures in three European case study basins (Adige, Sava and Evrotas). Simultaneous field work was designed to define and quantify the magnitude of stressors at each sampling site. The most evident relationships between changes in species richness and diversity were explained by changes in hydrology and morphological changes in the basins. The presence of pharmaceutical products (urban pollution) and pesticides was related to lower insect richness. Also emerging compounds, despite their low concentrations, seem to lead to a reduction in macrophyte abundance, richness and diversity. These results open the way to compare responses in the studied basins as representative of the European reality of the combined effects of multiple stressors on biological diversity.

Anthropogenic
Multi-stressors
Structure

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Presenters/Authors

Isabel Muñoz (), University of Barcelona, imunoz@ub.edu;