2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | SOIL NUTRIENT RETENTION ACROSS RESTORED FLOOPLAIN WETLAND HABITATS | Virtual Platform
SOIL NUTRIENT RETENTION ACROSS RESTORED FLOOPLAIN WETLAND HABITATS
Floodplain wetlands have been historically degraded by agricultural practices. The U.S. Department of Agriculture’s Wetlands Reserve Program (WRP) transitions cropland back to wetlands to restore ecosystem structure and function. We evaluated how WRP restoration practices influence nutrient retention on 14 restored wetlands in western Tennessee and Kentucky during the summers of 2019 and 2020. Thirty soil cores were collected from dominant habitat types and inundated with elevated nitrogen and phosphorus water using a flow-through system to estimate maximum uptake potentials. Nitrogen and phosphorus uptake, and denitrification rates were measured over 48-h. A linear mixed effects model was used to compare nutrient removal rates with habitat type and soil properties. Preliminary data suggest that soil oxygen demand, soil moisture, and soil organic matter have the strongest influence on nutrient uptake and denitrification potential. Natural regeneration habitats had greater phosphate retention and denitrification potential relative to shallow water and tree planting habitats. Phosphate uptake and denitrification rates appear to be highest after 24 h and 48 h of inundation, respectively. These preliminary results suggest that prolonging inundation and allowing for natural succession to occur may maximize nutrient retention in these wetlands.
- Biogeochemistry
- Management
- Restoration
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Presenters/Authors
Spencer Womble
(), Tennessee Tech University, sgwomble42@tntech.edu;
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Justin Murdock
(), Tennessee Tech University, jnmurdock@tntech.edu;
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Robert Brown
(), Tennessee Tech University, rsbrown43@tntech.edu;
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Shrijana Duwadi
(), Tennessee Tech University, sduwadi42@tntech.edu;
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