A 1-year greenhouse gas budget of a peatland exposed to long-term nutrient infiltration and altered hydrology: high carbon uptake and methane emission.

Berger S, Braeckevelt E, Blodau C, Burger M, Goebel M, Klemm O, Knorr K-H, Wagner-Riddle C

Forschungsartikel (Zeitschrift) | Peer reviewed

Zusammenfassung

Long-term increased nutrient influx into normally nutrient-limited peatlands in combination with altered hydrological conditions may threaten a peatland's carbon storage function and affect its greenhouse gas (GHG) budget. However, in situ studies on the effects of long-term altered conditions on peatland functioning and GHG budgets are scarce. We thus quantified GHG fluxes in a peatland exposed to enhanced water level fluctuations and long-term nutrient infiltration in Ontario, Canada, via eddy-covariance and flux chamber measurements. The peatland was a prominent sink of - 680 ± 202 g carbon dioxide (CO2) and a source of 22 ± 8 g methane (CH4) m-2 year-1, resulting in a negative radiative forcing of - 80 g CO2 eq. m-2 y-1. During the growing season CH4 fluxes were constantly high (0.1 g m-2 s-1). Further, on three dates, we measured nitrous oxide (N2O) fluxes and observed a small flux of 2.2 mg m-2 day-1 occurring during the thawing period. Taking the studied ecosystem as a model system for other peatlands exposed to long-term increased nutrient infiltration and enhanced water level fluctuations, our data suggest that such peatlands can maintain their carbon storage function and CO2 sequestration may outweigh emissions of CH4.

Details zur Publikation

FachzeitschriftEnvironmental Monitoring and Assessment (Environ Monit Assess)
Jahrgang / Bandnr. / Volume191
Ausgabe / Heftnr. / Issue533
StatusVeröffentlicht
Veröffentlichungsjahr2019
Sprache, in der die Publikation verfasst istEnglisch
DOI10.1007/s10661-019-7639-1
Link zum Volltexthttps://link.springer.com/article/10.1007/s10661-019-7639-1

Autor*innen der Universität Münster

Berger, Sina
Professur für Hydrologie (Prof. Blodau)
Blodau, Christian
Professur für Hydrologie (Prof. Blodau)
Burger, Magdalena
Professur für Hydrologie (Prof. Blodau)
Goebel, Marie
Betriebseinheit für die Lehreinheit Geowissenschaften I
Klemm, Otto
Professur für Klimatologie (Prof. Klemm)
Knorr, Klaus-Holger
Professur für Hydrologie (Prof. Knorr)