Assessment of soil CO2, CH4, and N2O fluxes and their drivers, and their contribution to the climate change mitigation potential of forest soils in the Lublin region of Poland

作者：Anna Walkiewicz, Piotr Bulak, M. I. Khalil, Bruce Osborne · 发表于：European Journal of Forest Research · 年份：2024 · DOI：10.1007/s10342-024-01739-0 · 被引用次数：10 · 研究领域：Soil Carbon and Nitrogen Dynamics、Peatlands and Wetlands Ecology、Geology and Environmental Impact Studies

Abstract Forests can play a key role in the mitigation of climate change, although there have been limited regional scale assessments that account for variations in soil type and tree species. Most of the focus has been on their ability to sequester atmospheric CO 2 , while there is less information on the two other major greenhouse gases (GHGs), N 2 O and CH 4 . We examined the GHG budgets of ten forest soils in Poland, considering all three major GHGs, where no previous long-term measurements had been made, which encompassed different tree species, stand age, and contrasting edaphic conditions. In addition to the quantification and assessment of seasonal variability in the major soil GHG fluxes over two years, the aims of the present study were (i) the identification of the main drivers of the soil-based GHG fluxes, (ii) the determination of the contribution of each gas to the Global Warming Potential (GWP), and (iii) to assess the mitigation potential of these fluxes over different forest systems. All the forest soils were sources of CO 2 and N 2 O and sinks for atmospheric CH 4 with pronounced seasonal variations in CO 2 and CH 4 driven by soil moisture and temperature. The soils showed significant differences in annual GHG fluxes, with average values of 16.7 Mg CO 2 ha −1 , − 3.51 kg CH 4 ha −1 , and 0.95 kg N 2 O ha −1 . The annual total GWP ranged from 13.1 to 22.0 Mg CO 2 eq ha −1 with CO 2 making the highest contribution , and forest-specific CH 4 uptake resulting in...