EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/26/2021 | 8:30 AM - 10:30 AM | GREENHOUSE GAS FLUX DYNAMICS IN A RIVER NETWORK FRAGMENTED BY DRYING | Virtual Platform
GREENHOUSE GAS FLUX DYNAMICS IN A RIVER NETWORK FRAGMENTED BY DRYING
Understanding human impacts on earth’s ecosystems is a critical challenge of the 21st century. Climate change, water abstraction, and water retention structures are predicted to increase the frequency and intensity of hydrological droughts worldwide. The drying of surface water is a disturbance that can fragment the river network. From a meta-ecosystem perspective, drying alters the lateral, vertical, and longitudinal flows of organisms, energy and resources across ecosystems. This fragmentation can influence biodiversity and important ecosystem functions such as the processing of carbon and nitrogen, and associated fluxes of greenhouse gases (GHGs). This proposed research will use chamber methods and automated analyzers, to measure CO2, CH4, and N2O at 20 reaches, across various hydrological conditions, throughout an intermittent river network, the Albarine, in Jura, France. In parallel, we will characterize reach-scale environmental conditions and the distribution and diversity of microbial and invertebrate decomposer communities. As hypothesized, preliminary results suggest there is spatial variability in GHG fluxes at the network scale related to substrate availability, flow regime and fragmentation level, and the distribution of decomposer communities. This research will help inform the management and conservation of intermittent rivers under increasing global threats.
- Greenhouse gases
- IRES
- Meta-ecosystems
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Presenters/Authors
Teresa Silverthorn
(), INRAE, teresa.silverthorn@inrae.fr;
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Thibault Datry
(), INRAE, France, Thibault.datry@inrae.fr;
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Abdelkader Azougui
(), INRAE, abdelkader.azougui@inrae.fr;
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Vincent Chanudet
(), EDF, France, vincent.chanudet@edf.fr;
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