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Journal Article

A multi-year study of ecosystem production and its relation to biophysical factors over a temperate peatland

Authors

Poczta,  Patryk
External Organizations;

Urbaniak,  Marek
External Organizations;

/persons/resource/tsachs

Sachs,  T.
1.4 Remote Sensing, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Harenda,  Kamila M.
External Organizations;

Klarzyńska,  Agnieszka
External Organizations;

Juszczak,  Radosław
External Organizations;

Schüttemeyer,  Dirk
External Organizations;

Czernecki,  Bartosz
External Organizations;

Kryszak,  Anna
External Organizations;

Chojnicki,  Bogdan H.
External Organizations;

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Fulltext (public)

5017803.pdf
(Publisher version), 7MB

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Citation

Poczta, P., Urbaniak, M., Sachs, T., Harenda, K. M., Klarzyńska, A., Juszczak, R., Schüttemeyer, D., Czernecki, B., Kryszak, A., Chojnicki, B. H. (2023): A multi-year study of ecosystem production and its relation to biophysical factors over a temperate peatland. - Agricultural and Forest Meteorology, 338, 109529.
https://doi.org/10.1016/j.agrformet.2023.109529


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017803
Abstract
Peatlands are among the largest stocks of soil carbon, which can be stored for thousands of years under well-wetted conditions. The main goals of the study were to assess annual and seasonal CO2 balances of a temperate peatland and the main biophysical factors affecting these CO2 fluxes. The studied peatland was usually a CO2 sink with a mean annual net ecosystem production (NEP) of 110±83 gCO2-C·m^−2·yr^−1 and extreme balances in 2006 (-17 gCO2-C·m^−2·yr^−1) and 2011 (194 gCO2-C·m^−2·yr^−1). Annual fluxes were not significantly correlated with biophysical variables, unlike seasonal data. Furthermore, the average air temperature in spring and summer was related to NEP at r^2=0.65 and r^2=0.61, respectively (warmer spring increased NEP while hot summer decreased NEP in these seasons). A decrease in daytime measured NEP during the summer period (June-August) was observed when TA exceeded 25 °C or VPD was above 15 hPa, respectively, due to the growing Reco and possibly plant photorespiration. These findings suggest a negative impact of ongoing global warming on temperate peatland CO2 balances.