Chimner, Rodney A, John A Hribljan, Tom Pypker, and Evan Kane
Proceedings of the 14th International Peat Congress
carbon, dewatering, flooding, poor-fen, warming
Theme X. Peatland carbon budgets and greenhouse gas (GHG) fluxes
We began a research project in 2007 in a large poor fen peatland complex in Seney National Wildlife Refuge (SNWR) to assess long-term (~70 years) drainage and flooding affects on ecosystem processes. At each of the six sites we installed open top chambers (OTC’s) to warm the soil. We found that increasing the water table over a 70 year period increased bulk density, NEE, CH4 emissions, and DOC. Conversely, lowering the water table decreased bulk density, NEE and CH4 emissions, but also increased DOC. In ambient sites, warming decreased NEE, but NEE did not change with warming in either the higher or lower water table manipulated sites. Warming also had no discernable influence on CH4 emissions.