EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/25/2021 | 8:30 AM - 10:30 AM | STREAMBEDS IN MOTION - IMPACT OF SEDIMENT MIGRATION ON THE ECOLOGY AND BIOGEOCHEMISTRY OF BENTHIC AND HYPORHEIC COMMUNITIES | Virtual Platform
STREAMBEDS IN MOTION - IMPACT OF SEDIMENT MIGRATION ON THE ECOLOGY AND BIOGEOCHEMISTRY OF BENTHIC AND HYPORHEIC COMMUNITIES
Streams and river beds are metabolic hotspots contributing significantly to global biogeochemical fluxes. Streambed morphodynamics is well recognized where sediment grains either move (migrating phase) or rest (resting phase). The frequency and the duration of these two alternating phases depend on the flow conditions and sediment grain size. The common perspective in stream ecology is binary and focuses on stable bed morphology that is infrequently disturbed by streambed migration during relatively short flood events. However, finer sediment fractions that make up large proportion to majority of sediment in some stream types migrate more frequently. Here, we extend the overly simplistic binary view by relating the frequency and duration of alternating resting and migrating phases to the temporal scale of biological processes. We expect sediment migration to act as a filter to the community depending on the temporal scale of sediment migration. The proposed concept enables to further the understanding of ecological and biogeochemical processes in streambeds with frequently rolling and saltating bedload as well as in sand-bed streams with migrating bedforms. We expect the spatiotemporal mosaic of migrating and resting streambed patches to shape processes at reach scale.
- Transport
- Biogeochemistry
- Ecological dynamics
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Presenters/Authors
Ute Risse-Buhl
(), Helmholtz Centre for Environmental Research, Magdeburg, Germany, ute.risse-buhl@ufz.de;
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Shai Arnon
(), Ben-Gurion University of the Negev, sarnon@bgu.ac.il;
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Edo Bar-Zeev
(), Ben-Gurion University of the Negev, Israel, edobarzeev@gmail.com;
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Anna Oprei
(), Technical University of Brandenburg Cottbus-Senftenberg, Germany, anna.oprei@b-tu.de;
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Aaron Packman
(), Northwestern University, a-packman@northwestern.edu;
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Ignacio Peralta-Maravar
(), University of Roehampton, UK, Nacho.Peralta@roehampton.ac.uk;
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Anne Robertson
(), Roehampton University, A.Robertson@roehampton.ac.uk;
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Yoni Teitelbaum
(), University of the Negev, Israel, ytbaum@gmail.com;
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Michael Mutz
(), Department of Freshwater Conservation, BTU-Cottbus Senftenberg, m.mutz@b-tu.de;
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