气候变化领域集成服务门户(CCPortal): Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems

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DOI	10.1007/s11104-024-06697-5
	Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems
	Dang, Ning; Wu, Hui; Liu, Heyong; Ma, Ruiao; Wang, Cong; Xu, Li; Wang, Zhengwen; Jiang, Yong; Li, Hui
发表日期	2024
ISSN	0032-079X
EISSN	1573-5036
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.
英文关键词	Forest-grassland transect; r-K selection theory; Climate change; Vegetation conversion; Soil microbial community composition; Soil enzymes
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:001217436400002
来源期刊	PLANT AND SOIL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301584
作者单位	Chinese Academy of Sciences; Shenyang Institute of Applied Ecology, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Hebei University; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS
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],2024.
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.
MLA	Dang, Ning,et al."Ecological strategies of soil microbes along climatic gradients: contrasting patterns in grassland and forest ecosystems".PLANT AND SOIL (2024).