The impact of occasional drought periods on vegetation spread and greenhouse gas exchange in rewetted fens.

ABSTRACT: Peatland rewetting aims at stopping the emissions of carbon dioxide (CO₂) and establishing net carbon sinks. However, in times of global warming, restoration projects must increasingly deal with extreme events such as drought periods. Here, we evaluate the effect of the European summer drought 2018 on vegetation development and the exchange of methane (CH₄) and CO₂ in two rewetted minerotrophic fens (Hütelmoor-Hte and Zarnekow-Zrk) including potential carry-over effects in the post-drought year. Drought was a major stress factor for the established vegetation but also promoted the rapid spread of new vegetation, which will likely gain a lasting foothold in Zrk. Accordingly, drought increased not only respiratory CO₂ losses but also photosynthetic

SUBMITTER: Koebsch F 

PROVIDER: S-EPMC7485093 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature