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DOI	10.1016/j.soilbio.2024.109388
	Aridity thresholds of microbiome-soil function relationship along a climatic aridity gradient in alpine ecosystem
	Zhang, Lu; Liao, Lirong; Dijkstra, Feike A.; Wang, Xiangtao; Delgado-Baquerizo, Manuel; Liu, Guobin; Wang, Guoliang; Song, Zilin; Gu, Jie; Zhang, Chao
发表日期	2024
ISSN	0038-0717
EISSN	1879-3428
起始页码	192
卷号	192
英文摘要	Aridity is known to influence the structure and function of the soil microbiome and their connection with ecosystem functions, however, whether aridity leads to gradual (or abrupt) and systemic (or specific) changes in the microbiome-ecosystem functions relationships in alpine ecosystems is largely unknown. Here, we conducted a survey of 60 sites along an aridity-gradient transect across the Tibetan Plateau to investigate changes in microbial diversity and functions and to evaluate their relationship with soil functionality. We found that plant richness and biomass, soil microbial richness (e.g., bacteria, fungi, diazotrophs, saprotrophs, pathotrophs and symbiotrophs), the relative abundance of copiotrophs and soil functionality (e.g., C-, N-, and P cycling, multifunctionality) decreased along the aridity gradient, whereas the proportion of genes associated with organic matter decomposition and denitrification increased (obtained from metagenomic sequencing). Above an aridity threshold of -0.6, soil multifunctionality decreased slowly and supported a larger proportion of genes associated with cellulose, hemicellulose, chitin, lignin and pectin degradation as well as genes associated with denitrification (e.g., nosZ, nosZ atypical 2, norB-cNor and norB-qNor). In drier habitats (>0.6 aridity level), microbial diversity and genes involved in organic matter decomposition and N cycling were strongly correlated with soil multifunctionality, whereas plant diversity was closely associated with soil multifunctionality in wetter habitats (<0.6 aridity level). Plant biomass and soil organic C play a key role in regulating microbial compositional and functional diversity and further affect soil multifunctionality in drier habitats. These findings suggest that soil microbiomes may play a larger role in maintaining soil multifunctionality in more arid environments than in less arid environments. Our results highlight the threshold responses of microbial diversity and functions to aridity and provide novel insight into mechanisms by which climate change affects ecosystem functions.
英文关键词	Microbial structure and function; Aridity; Soil function; Alpine ecosystem
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:001211285600001
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302178
作者单位	Northwest A&F University - China; Northwest A&F University - China; Chinese Academy of Sciences; Institute of Soil & Water Conservation (ISWC), CAS; University of Sydney; Tibet Agriculture & Animal Husbandry University; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS)
推荐引用方式 GB/T 7714	Zhang, Lu,Liao, Lirong,Dijkstra, Feike A.,et al. Aridity thresholds of microbiome-soil function relationship along a climatic aridity gradient in alpine ecosystem[J],2024,192.
APA	Zhang, Lu.,Liao, Lirong.,Dijkstra, Feike A..,Wang, Xiangtao.,Delgado-Baquerizo, Manuel.,...&Zhang, Chao.(2024).Aridity thresholds of microbiome-soil function relationship along a climatic aridity gradient in alpine ecosystem.SOIL BIOLOGY & BIOCHEMISTRY,192.
MLA	Zhang, Lu,et al."Aridity thresholds of microbiome-soil function relationship along a climatic aridity gradient in alpine ecosystem".SOIL BIOLOGY & BIOCHEMISTRY 192(2024).