biostudies-literatureUnknown13Yang YSoil dissolved organic matter (DOM) plays a vital role in biogeochemical processes. Global warming leads to increased freeze-thaw cycles (FTCs) in boreal forest soils, which can change DOM production and consumption. However, the interactions between the chemical composition of DOM molecules and the microbial communities that drive C decomposition in the context of freeze-thaw are poorly understood. Here, a FTCs incubation experiment was conducted. Combined with pyrolysis gas chromatography-mass spectrometry and high-throughput sequencing techniques, the relationships between DOM chemodiversity and microbial community structure were assessed. Results indicated that both low-frequency (2FTCs) and high-frequency freeze-thaw cycles (6FTCs) significantly increased soil dissolved organic carbonFrontiers in microbiology1012512https://www.ebi.ac.uk/biostudies/studies/S-EPMC9868181biostudies-literatureLinkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles.PMC9868181Cheng SFang HLi YYang YGuo YVancampenhout KShi FZhou YfalseLinkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles.Soil dissolved organic matter (DOM) plays a vital role in biogeochemical processes. Global warming leads to increased freeze-thaw cycles (FTCs) in boreal forest soils, which can change DOM production and consumption. However, the interactions between the chemical composition of DOM molecules and the microbial communities that drive C decomposition in the context of freeze-thaw are poorly understood. Here, a FTCs incubation experiment was conducted. Combined with pyrolysis gas chromatography-mass spectrometry and high-throughput sequencing techniques, the relationships between DOM chemodiversity and microbial community structure were assessed. Results indicated that both low-frequency (2FTCs) and high-frequency freeze-thaw cycles (6FTCs) significantly increased soil dissolved organic carbon2022-01-01T00:00:00Z20222026-05-27T22:44:56.879Z2025-02-19T04:45:48.27ZS-EPMC98681813669958310.3389/fmicb.2022.1012512