Northern peatland microbial communities exhibit resistance to warming and acquire electron acceptors from soil organic matter

作者：Katherine Duchesneau, Borja Aldeguer‐Riquelme, Caitlin Petro, Ghiwa Makke, Madison Green, Malak Tfaily, Rachel Wilson, Spencer Roth, Eric R. Johnston, Laurel A. Kluber, Christopher W. Schadt, Jesse Trejo, Stephen Callister, Samuel Purvine, Jeffrey P. Chanton, Paul J. Hanson, Susannah G. Tringe, Emiley A. Eloe‐Fadrosh, Tijana Glavina del Rio, Konstantinos Konstantinidis, Joel E. Kostka · 发表于：Nature Communications · 年份：2025 · DOI：10.1038/s41467-025-61664-7 · 被引用次数：9 · 研究领域：Peatlands and Wetlands Ecology、Methane Hydrates and Related Phenomena、Climate change and permafrost

The response of microbial communities that regulate belowground carbon turnover to climate change drivers in peatlands is poorly understood. Here, we leverage a whole ecosystem warming experiment to elucidate the key processes of terminal carbon decomposition and community responses to temperature rise. Our dataset of 697 metagenome-assembled genomes (MAGs) represents the microbial community from the surface (10 cm) to 2 m deep into the peat column, with only 3.7% of genomes overlapping with other well-studied peatlands. Community composition has yet to show a significant response to warming after 3 years, suggesting that metabolically diverse soil microbial communities are resistant to climate change. Surprisingly, abundant and active methanogens in the genus Candidatus Methanoflorens, Methanobacterium, and Methanoregula show the potential for both acetoclastic and hydrogenotrophic methanogenesis. Nonetheless, the predominant pathways for anaerobic carbon decomposition include sulfate/sulfite reduction, denitrification, and acetogenesis, rather than methanogenesis based on gene abundances. Multi-omics data suggest that organic matter cleavage provides terminal electron acceptors, which together with methanogen metabolic flexibility, may explain peat microbiome composition resistance to warming. Climate change is expected to impact microbes degrading organic matter in northern peatlands. Here, using a warming experiment, the authors show that communities remain stable after t...