EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/27/2021 | 2:00 PM - 3:30 PM | Nutrient recovery trajectories of restored riparian wetlands in agricultural watersheds | Virtual Platform
Nutrient recovery trajectories of restored riparian wetlands in agricultural watersheds
Agricultural watersheds contribute a substantial proportion of nutrients exported into the Lower Mississippi River Basin. Channelization and levee construction that disconnects the river and its floodplain, and the conversion of riparian wetlands into agricultural production greatly contribute to increased stream nutrient export. The USDA Natural Resources Conservation Service established the Wetlands Reserve Program over 20 years ago to restore marginal agricultural land back to functional wetland ecosystems. The goal of our research is to quantify restoration outcomes across 40 restored riparian wetlands throughout the major river basins in western Tennessee and Kentucky, focusing on flood events that reconnect rivers and floodplains. We are measuring easement nutrient retention as a function of time in the program (i.e. wetland successional stage) and restoration practices including hydrology and vegetation modifications. We present results from the first two years of a four-year study. Key findings include high denitrification rates across habitat types regardless of initial soil moisture, and increased retention after seven years in the program. The ecosystem services provided by these restored wetlands appears to reach beyond the creation of wildlife habitat by providing substantial water quality improvement in local and downstream agroecosystems.
- Restoration
- Ecohydrology
- Nutrient cycling
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Presenters/Authors
Justin Murdock
(), Tennessee Tech University, jnmurdock@tntech.edu;
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Robert Brown
(), Tennessee Tech University, rsbrown43@tntech.edu;
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Spencer Womble
(), Tennessee Tech University, sgwomble42@tntech.edu;
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Shrijana Duwadi
(), Tennessee Tech University, sduwadi42@tntech.edu;
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Morgan Michael
(), Tennessee Tech University, mamichael42@tntech.edu;
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Alfred Kalyanapu
(), Tennessee Tech University, akalyanapu@tntech.edu;
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