Sari Juutinen, Minna Väliranta, Anna M. Laine, Virpi Kuutti, Tarmo Virtanen, Heikki Seppä, Jan Weckström, Eeva-Stiina Tuittila
Proceedings of the 14th International Peat Congress
carbon-dioxide, carbon-export, greenhouse-gas, methane, terrestrial-aquatic
Theme X. Peatland carbon budgets and greenhouse gas (GHG) fluxes
We studied contemporary CO2 and CH4 exchange, lateral carbon (C) transfer, and long-term C accumulation dynamics in a peatland-stream-lake-continuum in northern Finland. Our catchment C budget showed that the aquatic loss of C equalled ~13% of the terrestrial net C input on an annual scale. The contemporary net C input estimate for the fen (22 g C m-2a-1) was larger than the long term carbon accumulation rate based on the peat cores (6.3–16.0 g C m-2a-1). This study provides reference values of C exchange and terrestrial-aquatic linkage from boreal-subarctic ecotone, which is prone to ongoing climatic change.