2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 8:30 AM - 10:30 AM | THE WHEN AND WHERE OF LARGE WOOD IN THE UPPER MISSISSIPPI RIVER SYSTEM: LESSONS FROM A 25-YEAR DATASET | Virtual Platform
THE WHEN AND WHERE OF LARGE WOOD IN THE UPPER MISSISSIPPI RIVER SYSTEM: LESSONS FROM A 25-YEAR DATASET
Large wood plays important geomorphic and ecological roles in rivers and is widely used as a habitat restoration tool. Historically, floodplain land use and wood removal altered wood dynamics in fluvial systems globally, including great rivers like the Upper Mississippi River System (UMRS). We know little about the distribution and dynamics of large wood in the UMRS despite its ecological importance and use in habitat restoration projects. We assessed 25 years of spatial wood occurrence data collected during fisheries sampling by the Upper Mississippi River Restoration Program in six reaches of the UMRS. We found significant declines in wood occurrence in most river reaches, and strong relationships between wood presence and aquatic habitat type, with the greatest abundance occurring in side channels. Wood presence was correlated with hydrogeomorphic factors such as water depth, wing dam or revetment presence, indicating transport- and source-related variables, and river infrastructure, have important influences on wood dynamics in great rivers. Our results show that large wood is a spatially and temporally dynamic component of the UMRS, and hydrogeomorphic variation should be considered when evaluating its use and longevity in large river habitat restoration projects.
- Connectivity
- Ecosystem Dynamics
- Flow
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Presenters/Authors
Molly Van Appledorn
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, mvanappledorn@usgs.gov;
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KathiJo Jankowski
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, kjankowski@usgs.gov ;
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Kaija Gahm
(), Yale University , kaija.gahm@yale.edu;
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Jason Rohweder
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, jrohweder@usgs.gov;
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