Linking soil microbial community to the chemical composition of dissolved organic matter in a boreal forest during freeze-thaw cycles
文献类型：期刊论文
| 作者 | Yang, Yan3; Geng, Jing2; Cheng, Shulan3; Fang, Huajun1,3,5; Guo, Yifan; Li, Yuna3; Zhou, Yi3; Shi, Fangying; Vancampenhout, Karen6 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 431页码:116359 |
| 关键词 | Freeze -thaw cycles Dissolved organic matter Pyrolysis gas chromatography -mass spectrom etry High -throughput sequencing Boreal forest |
| DOI | 10.1016/j.geoderma.2023.116359 |
| 文献子类 | Article |
| 英文摘要 | Soil dissolved organic matter (DOM) is mainly derived from the microbial degradation of organic matter. Intense freeze-thaw cycles (FTCs) elicited by warming alter the production and consumption of DOM in boreal forest soils, but little is known about the interactions between soil microbial community and DOM chemical composition. In this study, a FTCs incubation experiment was conducted to investigate the association between DOM dynamics and microbial community. DOM fingerprints were characterized using pyrolysis gas chromatographymass spectrometry (Py-GC/MS) technology, and bacterial and fungal community composition was analyzed using high-throughput sequencing and bioinformatics. Both two and six freeze-thaw cycles (2FTCs and 6FTCs) significantly increased soil dissolved organic carbon (DOC) and NH4+-N contents at 0-10 cm and 50-60 cm depths. FTCs significantly decreased the relative abundance of aromatic components in DOM, whereas increasing the relative abundance of polysaccharides and fatty acid methyl esters (FAMEs) in DOM. The degradation of lignin-derived aromatic compounds was accelerated and microbial-derived components accumulated. Also, bacterial community responded more sensitively to FTCs than fungal community. Significant changes in bacterial community network was observed during FTCs with increased linkages, shortened average path lengths, reduced modularity and relative abundance of dominant phyla, and decreased alpha diversity. However, FTCs only increased the average path length of soil fungal community. The higher connectivity indicated that FTCs enhanced the interactions between microbial community and DOM chemical components. FTCs led to a shift in bacterial keystone taxa from being present in specific DOM molecules to competing for common substrates. Overall, FTCs tended to activate DOM and increase availability, which could promote DOM turnover and increase soil C stabilization. These findings provide new insights into the molecular mechanisms of DOM dynamics in the boreal forest soils under increased FTCs. |
| WOS关键词 | MOLECULAR CHARACTERIZATION ; CARBON ; CHEMISTRY ; NITROGEN ; RESPONSES ; DYNAMICS ; PATTERNS ; QUALITY |
| WOS研究方向 | Agriculture |
| WOS记录号 | WOS:000927362400001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/200774]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Geospatial Engn & Sci, Zhuhai 519082, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 4.11A Datun Rd, Beijing 100101, Peoples R China 5.Katholieke Univ Leuven, Dept Earth & Environm Sci, Div Forest Nat & Landscape, Campus Geel,Kleinhoefstr 4, B-2440 Geel, Belgium 6.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining 810001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Yan,Geng, Jing,Cheng, Shulan,et al. Linking soil microbial community to the chemical composition of dissolved organic matter in a boreal forest during freeze-thaw cycles[J]. GEODERMA,2023,431:116359. |
| APA | Yang, Yan.,Geng, Jing.,Cheng, Shulan.,Fang, Huajun.,Guo, Yifan.,...&Vancampenhout, Karen.(2023).Linking soil microbial community to the chemical composition of dissolved organic matter in a boreal forest during freeze-thaw cycles.GEODERMA,431,116359. |
| MLA | Yang, Yan,et al."Linking soil microbial community to the chemical composition of dissolved organic matter in a boreal forest during freeze-thaw cycles".GEODERMA 431(2023):116359. |
入库方式： OAI收割
来源：地理科学与资源研究所
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