2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/27/2021 | 2:00 PM - 3:30 PM | Spatial Variation of Nutrient Uptake in a Restored Agricultural Wetland | Virtual Platform
Spatial Variation of Nutrient Uptake in a Restored Agricultural Wetland
The USDA Wetlands Reserve Program (WRP) was originally established to restore wildlife habitat in converted and degraded riparian wetlands, but an increased emphasis has also been put on restoring their ability to reduce nutrient runoff. We analyzed nutrient uptake rates and their variability across WRP restoration practices to evaluate nutrient retention rates in four main restoration habitat types; shallow water areas (SWA), remnant forests (RF), tree planting areas (TP), and natural regeneration areas (NR) in a west Tennessee wetland. We collected 30 soil/sediment cores from each habitat; and measured nitrate and phosphate uptake and denitrification potential in continuous-flow incubations for 72 hours, simulating a flood. Preliminary analyses show that nitrate uptake was highest in the SWA (207% more than other habitats), and phosphate uptake was highest in RF (159% more than others). Soil denitrification was similar among SWA, RP, and NR habitats, but was 176% lower in RF. We also found significant spatial variability in uptake across all habitats. These results suggest that no, one habitat provides optimum nitrogen and phosphorus removal, and a multihabitat approach may provide the best overall nutrient removal capacity.
- Biogeochemistry
- Nutrient cycling
- Restoration
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Presenters/Authors
Morgan Michael
(), Tennessee Tech University, mamichael42@tntech.edu;
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