2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/23/2018 | 9:15 AM - 9:30 AM | SHALLOW LAKE MANAGEMENT ATTRACTS WATERFOWL IN MINNESOTA DURING FALL MIGRATION | 430 B
SHALLOW LAKE MANAGEMENT ATTRACTS WATERFOWL IN MINNESOTA DURING FALL MIGRATION
Shallow lakes are key habitat for waterfowl, and aquatic managers will fluctuate lake water levels to enhance water quality, promote high abundance of aquatic vegetation, increase invertebrates for forage, and provide stop-overs for waterfowl during fall migration. Integration of long-term datasets on waterfowl use and habitat conditions are rare but valuable for demonstrating the utility of shallow lake management. We conducted aerial waterfowl surveys and in-lake habitat measurements at 34 shallow lakes for 10 years in order to obtain relationships regarding lake management, habitat changes, and waterfowl use in fall. We conducted waterfowl surveys annually (3-7 flights per year) and measured in-lake habitat variables, such as water chemistry, water clarity, emergent and submergent plant abundance, and water depth. Results show that managed lakes have an average water depth of <4 feet, improved water quality, increased submergent aquatic vegetation, and increased wild rice (Zizania palustris), compared to the unmanaged lakes. Regression suggested that duck density was best predicted by management, submergent vegetation, and wild rice (r2 = 0.4). We conclude that improved habitat conditions from lake management can increase total duck densities, including mallards and ring-neck ducks, during fall migration.
- Lentic
- Management
- Wetland
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Presenters/Authors
Danelle Larson
(), U.S. Geological Survey, danellelarson77@gmail.com;
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Steve Cordts
(), Minnesota Department of Natural Resources, steve.cordts@state.mn.us;
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Nicole Hansel-Welch
(), Minnesota Department of Natural Resources, nicole.hansel-welch@state.mn.us;
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