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Linkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles

文献类型：期刊论文

作者Yang, Yan1,2; Cheng, Shulan2; Fang, Huajun1,2,3,4; Guo, Yifan1; Li, Yuna2; Zhou, Yi2; Shi, Fangying1; Vancampenhout, Karen5
刊名FRONTIERS IN MICROBIOLOGY
出版日期2023-01-09
卷号13页码:15
关键词freeze-thaw cycles dissolved organic matter pyrolysis gas chromatography-mass spectrometry high-throughput sequencing boreal forest
DOI10.3389/fmicb.2022.1012512
通讯作者Cheng, Shulan(slcheng@ucas.ac.cn) ; Fang, Huajun(fanghj@igsnrr.ac.cn)
英文摘要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 carbon (DOC) contents in the surface (0-10 cm) and subsurface (50-60 cm) soil layers. In the topsoil, FTCs significantly reduced the relative abundance of aromatic compounds, but increased the relative proportions of alkanes, phenols, fatty acid methyl esters (Me) and polysaccharides in the DOM. In the subsuface soil layer, only the relative abundance of Me in the 6FTCs treatment increased significantly. The response of bacterial communities to FTCs was more sensitive than that of fungi, among which only the relative abundance of Gammaproteobacteria increased by FTCs. Moreover, the relative abundance of these taxa was positively correlated with the increment of DOC. Co-occurrence networks confirmed DOM-bacterial interactions, implying that specific microorganisms degrade specific substrates. At class level, Gammaproteobacteria were significantly positively correlated with labile C (polysaccharides and alkanes), whereas other bacterial classes such as Actinobacteria, Alphaproteobacteria, and Thermoleophilia were significantly positively correlated with aromatic compounds in the topsoil. Collectively, FTCs tended to activate DOM and enhance its biodegradability of DOM, potentially hampering DOC accumulation and C sequestration. These findings highlight the potential of DOM molecular mechanisms to regulate the functional states of soil bacterial communities under increased FTCs.
WOS关键词CHEMICAL-COMPOSITION ; NITROGEN ; CHEMISTRY ; DYNAMICS ; DEGRADATION ; SEQUENCES ; RESPONSES ; BACTERIA ; MEMBERS ; BIOMASS
资助项目Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK1003] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28130100] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA200204020] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23060401] ; National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[31770558] ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province[VWH-E1313-SAB/22/016] ; Key research and development projects of Ji'an Science and Technology Bureau[20111ZDF04022] ; FWO ; [TTPPHEITQP-2019]
WOS研究方向Microbiology
语种英语
出版者FRONTIERS MEDIA SA
WOS记录号WOS:000919067200001
资助机构Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province ; Key research and development projects of Ji'an Science and Technology Bureau ; FWO
源URL[http://ir.igsnrr.ac.cn/handle/311030/189314]  
专题中国科学院地理科学与资源研究所
通讯作者Cheng, Shulan; Fang, Huajun
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining, Peoples R China
4.Zhongke Jian Inst Ecoenvironm Sci, Jian, Peoples R China
5.Katholieke Univ Leuven, Fac Sci, Dept Earth & Environm Sci, Div Forest Nat & Landscape, Leuven, Belgium
推荐引用方式
GB/T 7714		 Yang, Yan,Cheng, Shulan,Fang, Huajun,et al. Linkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles[J]. FRONTIERS IN MICROBIOLOGY,2023,13:15.
APA Yang, Yan.,Cheng, Shulan.,Fang, Huajun.,Guo, Yifan.,Li, Yuna.,...&Vancampenhout, Karen.(2023).Linkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles.FRONTIERS IN MICROBIOLOGY,13,15.
MLA Yang, Yan,et al."Linkages between the molecular composition of dissolved organic matter and soil microbial community in a boreal forest during freeze-thaw cycles".FRONTIERS IN MICROBIOLOGY 13(2023):15.

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来源：地理科学与资源研究所

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