2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

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5/24/2021 | 8:30 AM - 10:30 AM | Hydrological and environmental drivers of macroinvertebrate communities in alpine catchments | Virtual Platform

Hydrological and environmental drivers of macroinvertebrate communities in alpine catchments

Alpine catchments display particularly complex hydrographic networks, characterized by high environmental and hydrological heterogeneities, as they include streams from different water sources. This mosaic of stream habitats generates high spatial variability in aquatic communities within catchments. Combined effects of climate change and anthropogenic pressures on water resources induce rapid environmental changes in alpine catchments. To maintain the sustainability of alpine streams, it is urgent to quantify the relative effects of hydrological and environmental drivers on aquatic communities. To date, relationships between stream habitats and macroinvertebrate communities have not been compared among multiple alpine catchments. In this study, we measured physico-chemical and hydraulic conditions, estimated hydrological conditions (simulation), and sampled benthic macroinvertebrates in 66 stream reaches located in three catchments in the French Alps. Based on Co-Inertia analyses and Negative Binomial Generalized Linear Mixed models, we quantified, respectively, the responses of macroinvertebrate at both community and taxa level to stream habitat characteristics, and we tested the transferability of invertebrate responses across different catchments.

Habitat
Models
Flow regime

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Presenters/Authors

Juliette Becquet (), INRAE, juliette.becquet@inrae.fr;