2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2021 | 8:30 AM - 10:30 AM | Twenty-six years of data across 1500 river kilometers reveal diverse ecological changes and interactions in a large-floodplain river system | Virtual Platform
Twenty-six years of data across 1500 river kilometers reveal diverse ecological changes and interactions in a large-floodplain river system
Large floodplain rivers are complex and spatially extensive. Collecting and learning from data spanning their longitudinal and lateral gradients is challenging. The Long Term Resource Monitoring element of the Upper Mississippi River Restoration Program has monitored 6 reaches of the Upper Mississippi and Illinois rivers since 1993. These reaches range in length from 38 to 125 river km, span 1500 river km, and contain diverse aquatic and terrestrial areas. Our recent assessment of long-term trends found a long-term increase in discharge throughout the system. Total phosphorus and total suspended solids decreased in some study reaches and tributaries, but total nitrogen exhibited few long-term trends. Backwater depth has decreased in some areas due to sedimentation. In some reaches, water clarity and vegetation abundance have increased and feedbacks between them may have sustained that change during recent years of high discharge. Floodplain forest area declined in most areas, likely due to long-term changes in hydrology. Bigheaded carps have proliferated in some study reaches with diverse effects on the food web and ecosystem productivity. This comprehensive river assessment is intended to inform the restoration and management of the ecosystem.
- Monitoring
- Biological interactions
- Nutrients
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Presenters/Authors
Jeffrey Houser
(), USGS Upper Midwest Environmental Sciences Center, jhouser@usgs.gov;
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Kristen Bouska
(), U.S. Geological Survey, kbouska@usgs.gov;
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Nathan De Jager
(), US Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, WI 54603, ndejager@usgs.gov;
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Brian Ickes
(), US Geological Survey, bickes@usgs.gov;
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KathiJo Jankowski
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, kjankowski@usgs.gov ;
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Danelle Larson
(), U.S. Geological Survey, dmlarson@usgs.gov ;
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Jason Rohweder
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, jrohweder@usgs.gov;
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James Rogala
(), U.S. Geological Survey, jrogala@usgs.gov;
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Molly Van Appledorn
(), U.S. Geological Survey, Upper Midwest Environmental Sciences Center, mvanappledorn@usgs.gov;
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Andrew Bartels
(), Wisconsin Department of Natural Resources, abartels@contractor.usgs.gov;
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Alicia Carhart
(), Wisconsin Department of Natural Resources, Alicia.Carhart@wisconsin.gov;
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Deanne Drake
(), Wisconsin Department of Natural Resources, Deanne.Drake@wisconsin.gov;
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Shawn Giblin
(), Wisconsin Department of Natural Resources, shawn.giblin@wisconsin.gov;
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John Kalas
(), Wisconsin Department of Natural Resources, John.Kalas@wisconsin.gov;
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Kyle Bales
(), Iowa Department of Natural Resources, kyle.bales@dnr.iowa.gov;
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Melvin Bowler
(), Iowa Department of Natural Resources, melvin.bowler@dnr.iowa.gov;
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Robert Burdis
(), Minnesota Department of Natural Resources, robert.burdis@state.mn.us;
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Eric Lund
(), Minnesota Department of Natural Resources, Eric.Lund@state.mn.us;
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Kristopher Maxson
(), Illinois Natural History Survey, Illinois River Biological Station, kmax87@illinois.edu;
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Levi Solomon
(), Illinois Natural History Survey, soloml@illinois.edu;
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