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Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems

文献类型：期刊论文

作者Dang, Ning3,4; Wu, Hui3,4; Liu, Heyong2; Ma, Ruiao4; Wang, Cong3,4; Xu, Li1; Wang, Zhengwen4; Jiang, Yong2; Li, Hui4
刊名PLANT AND SOIL
出版日期2024-05-03
卷号N/A页码:21
关键词Forest-grassland transect r-K selection theory Climate change Vegetation conversion Soil microbial community composition Soil enzymes
ISSN号0032-079X
DOI10.1007/s11104-024-06697-5
英文摘要Background and aimsThe forest-grassland transect in the Greater Khingan Mountains, located in the southern edge of the permafrost region in Eurasia, is more vulnerable to climatic changes than other terrestrial ecosystems. The impacts of climate-induced vegetation conversion on soil microbial ecological strategies are still under debate, and the underlying mechanisms are not known.MethodsSoil microbial community composition was investigated using 16SrRNA gene amplicon sequencing. The activities of soil enzymes responsible for organic matter mineralization, along with soil physicochemical properties and vegetation characteristics were examined in parallel. The dominance of microbial r-strategy was predicted by a variety of physiological and phylogenetic traits, including the r-/K-strategists ratio, the ribosomal RNA (rrn) operon copy number of bacterial community, saprotrophic/ectomycorrhizal fungi ratio, and the stoichiometric ratio between enzymes hydrolyzing simple (cellobiose and oligosaccharide) and complex (cellulose and protein) organic compounds.ResultsOverall, microbial r-strategy relevant traits were higher in grasslands than in forests. Within forests, when vegetation changed from conifers to broadleaf forests from northeast to southwest, the labile carbon fraction of soil organic matter increased, stimulating the prevalence of soil microbial community r-strategy. Across grassland sites, the r-strategy relevant traits decreased towards the warm, dry site, due to the declined C and N availability.ConclusionThis study implied that, under future warm conditions, forest ecosystems would be associated with an r-shifted soil microbial community and thus face a potential risk of carbon loss; whereas in grassland ecosystem, soil microbial community would be shifted towards a K-spectrum and might reduce the risk of carbon loss.
WOS关键词BACTERIAL COMMUNITY STRUCTURE ; BETA-GLUCOSAMINIDASE ACTIVITY ; RIBOSOMAL-RNA ; ORGANIC-MATTER ; FUNGAL COMMUNITIES ; OLD CARBON ; RESPONSES ; NITROGEN ; DYNAMICS ; DECOMPOSITION
资助项目National Natural Science Foundation of China[32171568] ; National Natural Science Foundation of China[42230515] ; National Natural Science Foundation of China[32101320] ; National Natural Science Foundation of China
WOS研究方向Agriculture ; Plant Sciences
语种英语
WOS记录号WOS:001217436400002
出版者SPRINGER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/205861]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Li, Hui
作者单位1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Hebei Univ, Coll Life Sci, Baoding 071002, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, CAS Key Lab Forest Ecol & Silviculture, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714		 Dang, Ning,Wu, Hui,Liu, Heyong,et al. Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems[J]. PLANT AND SOIL,2024,N/A:21.
APA Dang, Ning.,Wu, Hui.,Liu, Heyong.,Ma, Ruiao.,Wang, Cong.,...&Li, Hui.(2024).Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems.PLANT AND SOIL,N/A,21.
MLA Dang, Ning,et al."Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems".PLANT AND SOIL N/A(2024):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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