Publication Details

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Title (Primary) Changes of methane and nitrous oxide emissions in a transition bog in central Germany (German National Park Harz Mountains) after rewetting
Author Osterloh, K.; Tauchnitz, N.; Spott, O.; Hepp, J.; Bernsdorf, S.; Meissner, R.;
Journal Wetlands Ecology and Management
Year 2018
Department BOSYS;
Volume 26
Issue 1
Language englisch;
POF III (all) T31;
Supplements https://static-content.springer.com/esm/art%3A10.1007%2Fs11273-017-9555-x/MediaObjects/11273_2017_9555_MOESM1_ESM.pdf
https://static-content.springer.com/esm/art%3A10.1007%2Fs11273-017-9555-x/MediaObjects/11273_2017_9555_MOESM2_ESM.pdf
https://static-content.springer.com/esm/art%3A10.1007%2Fs11273-017-9555-x/MediaObjects/11273_2017_9555_MOESM3_ESM.pdf
Keywords Climate change; Methane; Nitrous oxide; Renaturation; Vegetation shifts; Wetland
UFZ wide themes RU1
Abstract During the last decades, various renaturation programmes have been initialized to recover nutrient sink and ecological functions of peatlands by rewetting. Rewetting, however, often results in the formation of hotspots for methane (CH4) emissions and in temporal dieback of local vegetation. The present study aimed at quantifying changes of CH4 and nitrous oxide (N2O) emissions in a peatland currently under continuous rewetting conditions. Emissions where studied at a permanently flooded site and a non-flooded peat site with fluctuating water tables by using common closed chamber method. The permanently flooded site revealed extremely high CH4 emissions (up to 1195 mg C m−2 d−1) which were positively correlated with temperature, nutrient content, dissolved organic carbon and nitrogen concentration of the peat soil water. In contrast, the non-flooded peat site, with lower and fluctuating water tables (WT), showed significantly lower CH4 emissions and an increasing trend of CH4 release associated with a generally increasing WT caused by the progressing rewetting process. Lower N2O emissions (<24 µg N m−2 d−1) were observed at the flooded site. By contrast, the non-flooded peat site with fluctuating WT showed significantly higher N2O emissions (up to 4178 µg N m−2 d−1), in particular at high temperatures during summer time. The present results indicate that permanently flooded conditions during rewetting processes might cause higher CH4 emissions compared to fluctuating WT which in contrast might enhance N2O emissions. In total, however, no decreasing trend for CH4 emissions throughout the five-year renaturation period could be found. At least for N2O we observed a decreasing trend during rewetting.
ID 18848
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=18848
Osterloh, K., Tauchnitz, N., Spott, O., Hepp, J., Bernsdorf, S., Meissner, R. (2018):
Changes of methane and nitrous oxide emissions in a transition bog in central Germany (German National Park Harz Mountains) after rewetting
Wetl. Ecol. Manag. 26 (1), 87 - 102