TY - JOUR U1 - Wissenschaftlicher Artikel A1 - Weil, Micha A1 - Wang, Haitao A1 - Bengtsson, Mia A1 - Köhn, Daniel A1 - Günther, Anke A1 - Jurasinski, Gerald A1 - Couwenberg, John A1 - Negassa, Wakene A1 - Zak, Dominik A1 - Urich, Tim T1 - Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering JF - Microorganisms N2 - Drained peatlands are significant sources of the greenhouse gas (GHG) carbon dioxide.Rewetting is a proven strategy used to protect carbon stocks; however, it can lead to increasedemissions of the potent GHG methane. The response to rewetting of soil microbiomes as drivers ofthese processes is poorly understood, as are the biotic and abiotic factors that control communitycomposition. We analyzed the pro- and eukaryotic microbiomes of three contrasting pairs ofminerotrophic fens subject to decade-long drainage and subsequent long-term rewetting. Abiotic soilproperties including moisture, dissolved organic matter, methane fluxes, and ecosystem respirationrates were also determined. The composition of the microbiomes was fen-type-specific, but allrewetted sites showed higher abundances of anaerobic taxa compared to drained sites. Based onmulti-variate statistics and network analyses, we identified soil moisture as a major driver ofcommunity composition. Furthermore, salinity drove the separation between coastal and freshwaterfen communities. Methanogens were more than 10-fold more abundant in rewetted than in drainedsites, while their abundance was lowest in the coastal fen, likely due to competition with sulfatereducers. The microbiome compositions were reflected in methane fluxes from the sites. Our resultsshed light on the factors that structure fen microbiomes via environmental filtering. KW - - KW - peatland management KW - soil microbiome KW - methanogens KW - sulfate reducers KW - methanotrophic bacteria KW - greenhouse gas KW - methane Y1 - 2020 UN - https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-36981 SN - 2076-2607 SS - 2076-2607 U6 - https://doi.org/https://doi.org/10.3390/microorganisms8040550 DO - https://doi.org/https://doi.org/10.3390/microorganisms8040550 VL - 8 IS - 4 SP - 550 PB - MDPI CY - Basel ER -