2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 9:15 AM - 9:30 AM | IDENTIFYING THE JOINT EFFECTS OF FLOW VARIABILITY AND URBAN WASTEWATER ON MACROINVERTEBRATE COMMUNITIES: A TAXONOMIC AND FUNCTIONAL APPROACH | 310 B
IDENTIFYING THE JOINT EFFECTS OF FLOW VARIABILITY AND URBAN WASTEWATER ON MACROINVERTEBRATE COMMUNITIES: A TAXONOMIC AND FUNCTIONAL APPROACH
Urban wastewater effluents constitute a source of nutrients, organic matter and emerging contaminants to the receiving freshwater ecosystems. In arid and semi-arid regions such the Mediterranean, wastewater effluents can represent a large contribution to the river discharge during low and non-flow periods, therefore posing an important chemical pollution threat for the biological communities. Our aim was to analyse the joint effects of urban wastewater and hydrological variability on freshwater invertebrate communities in Mediterranean rivers combining a taxonomic and a functional approach. As substrate is a key factor that determines macroinvertebrate-community composition, additionally, we aimed to know how different macroinvertebrates communities respond to the stressors. We sampled twelve sites with different substrate type (mud and pebble), upstream and downstream from sewage inputs, in the dry and wet seasons. Community composition, richness, abundance and biomass changed between up and downstream reach, as did pharmaceuticals and nutrient concentrations. Invertebrate body size, resistance form and feeding habits also changed. In addition, the type of substrate induced a different intensity in the community response suggesting that the composition of the receiving community determines the taxonomic and functional change induced by the wastewater.
- Hydrology
- Invertebrate
- Disturbance
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Presenters/Authors
Jordi-René Mor
(), University of Barcelona, jrmor@icra.cat;
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Sylvain Dolédec
(), UMR 5023 – LEHNA, Biodiversité et Plasticité dans les Hydrosystèmes, Université Lyon 1, Villeurbanne, France, sylvain.doledec@univ-lyon1.fr;
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Olatz Pereda
(), University of the Basque Country, olatz.pereda@ehu.eus;
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Vicens Acuña
(), Catalan Institute for Water Research, vacuna@icra.cat;
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Arturo Elosegi
(), University of the Basque Country (UPV/EHU), arturo.elosegi@ehu.eus;
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Ladislav Mandaric
(), ICRA, lmandaric@icra.cat;
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Sergi Sabater
(), Catalan Institute for Water Research (ICRA), Girona, Spain, ssabater@icra.cat;
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Isabel Muñoz
(), University of Barcelona, imunoz@ub.edu;
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