1a. Objectives (from AD-416):
Assist NRCS in providing science-based data, results, and information to routinely inform conservation decisions affecting wetland ecosystems and the services they provide. Assist NRCS in developing a broad collaborative foundation that facilitates the production and delivery of scientific data, results, and information.
1b. Approach (from AD-416):
The funds used for in-house efforts will focus on assessments of denitrification in the wetland sites. The denitrificatin enzme assays will be on the approximately 50 evaluation sites. Greenhouse gas chamber analyses will be done on a select number of sites via a static chamber and a photoacoustic analyzer. The Mitchell Ecology effort will be done via an SCA focused on amphibian evaluations, considering potential connections with the conditions for and the level of denitrification.
3. Progress Report:
This research supports project objective 3: Develop practices and technologies that enhance denitrification with minimized nitrous oxide emissions in water table managed fields and wetlands. Three types of management and landscape elevations were assessed for emission of carbon dioxide and nitrous oxide. The managements were 1) Prior Converted – converted from wetland to farmland, 2) Restored – returned to wetland status within the last 10 years, and 3) Natural – no farming on land within the last 50 years. Both the carbon dioxide and nitrous oxide emissions were greater in the wetter landscape elevations. The natural wetlands were lowest in nitrous oxide emissions, but they were also the lowest in denitrification enzyme activity.