Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering
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 increased emissions of the potent GHG methane. The response to rewetting of soil microbiomes as drivers of these processes is po...
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doaj-4cea03606b86400e8d6ba0b18fe7f4cb2020-11-25T03:54:24ZengMDPI AGMicroorganisms2076-26072020-04-01855055010.3390/microorganisms8040550Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental FilteringMicha Weil0Haitao Wang1Mia Bengtsson2Daniel Köhn3Anke Günther4Gerald Jurasinski5John Couwenberg6Wakene Negassa7Dominik Zak8Tim Urich9Institute of Microbiology, University of Greifswald, Felix-Hausdorff-Str. 8, 17487 Greifswald, GermanyInstitute of Microbiology, University of Greifswald, Felix-Hausdorff-Str. 8, 17487 Greifswald, GermanyInstitute of Microbiology, University of Greifswald, Felix-Hausdorff-Str. 8, 17487 Greifswald, GermanyFaculty of Agriculture and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, GermanyFaculty of Agriculture and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, GermanyFaculty of Agriculture and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, GermanyInstitute of Botany and Landscape Ecology, University of Greifswald, Soldmannstraße 15, 17487 Greifswald, GermanyFaculty of Agriculture and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, 18059 Rostock, GermanyDepartment of Chemical Analytics and Biogeochemistry, Leibniz-Institute of Freshwater Biology and Inland Fisheries, Müggelseedamm 301, 12587 Berlin, GermanyInstitute of Microbiology, University of Greifswald, Felix-Hausdorff-Str. 8, 17487 Greifswald, GermanyDrained 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 increased emissions of the potent GHG methane. The response to rewetting of soil microbiomes as drivers of these processes is poorly understood, as are the biotic and abiotic factors that control community composition. We analyzed the pro- and eukaryotic microbiomes of three contrasting pairs of minerotrophic fens subject to decade-long drainage and subsequent long-term rewetting. Abiotic soil properties including moisture, dissolved organic matter, methane fluxes, and ecosystem respiration rates were also determined. The composition of the microbiomes was fen-type-specific, but all rewetted sites showed higher abundances of anaerobic taxa compared to drained sites. Based on multi-variate statistics and network analyses, we identified soil moisture as a major driver of community composition. Furthermore, salinity drove the separation between coastal and freshwater fen communities. Methanogens were more than 10-fold more abundant in rewetted than in drained sites, while their abundance was lowest in the coastal fen, likely due to competition with sulfate reducers. The microbiome compositions were reflected in methane fluxes from the sites. Our results shed light on the factors that structure fen microbiomes via environmental filtering.https://www.mdpi.com/2076-2607/8/4/550peatland managementsoil microbiomemethanogenssulfate reducersmethanotrophic bacteriagreenhouse gas |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Micha Weil Haitao Wang Mia Bengtsson Daniel Köhn Anke Günther Gerald Jurasinski John Couwenberg Wakene Negassa Dominik Zak Tim Urich |
spellingShingle |
Micha Weil Haitao Wang Mia Bengtsson Daniel Köhn Anke Günther Gerald Jurasinski John Couwenberg Wakene Negassa Dominik Zak Tim Urich Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering Microorganisms peatland management soil microbiome methanogens sulfate reducers methanotrophic bacteria greenhouse gas |
author_facet |
Micha Weil Haitao Wang Mia Bengtsson Daniel Köhn Anke Günther Gerald Jurasinski John Couwenberg Wakene Negassa Dominik Zak Tim Urich |
author_sort |
Micha Weil |
title |
Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering |
title_short |
Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering |
title_full |
Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering |
title_fullStr |
Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering |
title_full_unstemmed |
Long-Term Rewetting of Three Formerly Drained Peatlands Drives Congruent Compositional Changes in Pro- and Eukaryotic Soil Microbiomes through Environmental Filtering |
title_sort |
long-term rewetting of three formerly drained peatlands drives congruent compositional changes in pro- and eukaryotic soil microbiomes through environmental filtering |
publisher |
MDPI AG |
series |
Microorganisms |
issn |
2076-2607 |
publishDate |
2020-04-01 |
description |
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 increased emissions of the potent GHG methane. The response to rewetting of soil microbiomes as drivers of these processes is poorly understood, as are the biotic and abiotic factors that control community composition. We analyzed the pro- and eukaryotic microbiomes of three contrasting pairs of minerotrophic fens subject to decade-long drainage and subsequent long-term rewetting. Abiotic soil properties including moisture, dissolved organic matter, methane fluxes, and ecosystem respiration rates were also determined. The composition of the microbiomes was fen-type-specific, but all rewetted sites showed higher abundances of anaerobic taxa compared to drained sites. Based on multi-variate statistics and network analyses, we identified soil moisture as a major driver of community composition. Furthermore, salinity drove the separation between coastal and freshwater fen communities. Methanogens were more than 10-fold more abundant in rewetted than in drained sites, while their abundance was lowest in the coastal fen, likely due to competition with sulfate reducers. The microbiome compositions were reflected in methane fluxes from the sites. Our results shed light on the factors that structure fen microbiomes via environmental filtering. |
topic |
peatland management soil microbiome methanogens sulfate reducers methanotrophic bacteria greenhouse gas |
url |
https://www.mdpi.com/2076-2607/8/4/550 |
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