WATER RESOURCES RESEARCH GRANT PROPOSAL
Project ID: 2004SD21B
Title: Coupled Carbon-Nitrogen Geochemistry under Reducing Conditions in a Prairie Pothole
Project Type: Research
Focus Categories: Groundwater, Water Quality, Hydrogeochemistry
Keywords: carbon cycle, nitrogen cycle, prairie pothole, dissolved organic carbon, dissolved organic nitrogen, NOM, organic geochemistry
Start Date: 03/01/2004
End Date: 02/28/2005
Federal Funds: $7,000
Non-Federal Matching Funds: $14,375
Congressional District: First
James A. Rice
A study proposed to understand the coupled carbon-nitrogen cycle in a prairie
pothole wetland. This site is unique because it rapidly becomes anoxic after
the water surface freezes in the winter, and rapidly becomes oxic in the spring,
and stays oxic, because it is well-mixed by the prevailing winds. It thuis
represents a convenient closed chemical reactor to study these reactions.
This proposal requests funding for the first year of what will be a three-year
project. The overall project has the following objectives:
1. Determine the annual variation in the redox potential of the pothole.
2. Create a nitrogen and carbon mass balance for the pothole.
3. Determine the form of nitrogen present in the dissolved organic matter.
4. Using 15N and 13C labeled compounds, trace the coupled C-N transformations in the pothole under oxic and anoxic conditions.