干旱区生态环境知识资源中心(Arid): Aridity Threshold Induces Abrupt Change of Soil Abundant and Rare Bacterial Biogeography in Dryland Ecosystems

Arid

DOI	10.1128/msystems.01309-21
	Aridity Threshold Induces Abrupt Change of Soil Abundant and Rare Bacterial Biogeography in Dryland Ecosystems
	Pan, Haibo; Gao, Hang; Peng, Ziheng; Chen, Beibei; Chen, Shi; Liu, Yu; Gu, Jie; Wei, Xiaorong; Chen, Weimin; Wei, Gehong; Jiao, Shuo
通讯作者	Jiao, S
来源期刊	MSYSTEMS
ISSN	2379-5077
出版年	2022
卷号	7 期号:1
英文摘要	Aridity, which is increasing worldwide due to climate change, affects the biodiversity and functions of dryland ecosystems. Whether aridification leads to gradual (or abrupt) and systemic (or specific) changes in the biogeography of abundant and rare microbial species is largely unknown. Here, we investigated stress-adaptive changes (aridity-driven, ranging from 0.65 to 0.94) and biogeographic patterns of abundant and rare bacterial communities in different habitats, including agricultural field, forest, wetland, grassland, and desert, in desert oasis transition zones in northern China. We observed abrupt changes at the breakpoint of aridity values (0.92), characterized by diversity (alpha-diversity and beta-diversity), species coexistence, community assembly processes, and phylogenetic niche conservatism. Specifically, when aridity was <0.92, increasing aridity led to more deterministic assembly and species coexistences for the abundant subcommunity, whereas the reverse was observed for the rare subcommunity. The phylogenetic niche conservatism for both subcommunities increased slowly with aridity. When aridity was >0.92, the systemic responses of abundant and rare taxa changed dramatically in a consistent direction, such that both subcommunities rapidly tended to have a more deterministic assembly, species coexistence, and stronger phylogenetic niche conservatism with increasing aridity. In addition, the change rates of abundant taxa were higher than those of rare taxa, indicating the more sensitive responses of abundant taxa along aridity variation. This finding has important implications for understanding the impact of aridity on the structure and function of abundant and rare soil taxa and how diversity maintenance is associated with soil microbiota responding to global change. The abrupt threshold of soil bacteria found can be used for buffering and for building effective adaptation and mitigation measures aimed at maintaining the capacity of drylands for basic ecosystem functioning. IMPORTANCE Aridity, which is increasing worldwide due to climate change, affects the biodiversity and functions of dryland ecosystems. We provided the first statistical evidence for abrupt changes of species coexistence, ecological processes, and niche conservation of abundant and rare soil bacteria triggered by diversity to abrupt increases in aridity. The abrupt threshold of soil bacterial community response to aridity is spatially heterogeneous at the local scale and should be specified according to local conditions for buffering and for building effective adaptation and mitigation measures aimed at maintaining the capacity of drylands for basic ecosystem functioning.
英文关键词	aridity threshold terrestrial ecosystems biogeography microbial diversity community assembly microbial co-occurrence niche conservatism
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000760939200010
WOS关键词	ASSEMBLY PROCESSES ; CLASSIFICATION ; COMMUNITIES ; DIVERSITY ; PATTERNS ; FEATURES ; FORESTS ; SCALE ; LAND
WOS类目	Microbiology
WOS研究方向	Microbiology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376636
推荐引用方式 GB/T 7714	Pan, Haibo,Gao, Hang,Peng, Ziheng,et al. Aridity Threshold Induces Abrupt Change of Soil Abundant and Rare Bacterial Biogeography in Dryland Ecosystems[J],2022,7(1).
APA	Pan, Haibo.,Gao, Hang.,Peng, Ziheng.,Chen, Beibei.,Chen, Shi.,...&Jiao, Shuo.(2022).Aridity Threshold Induces Abrupt Change of Soil Abundant and Rare Bacterial Biogeography in Dryland Ecosystems.MSYSTEMS,7(1).
MLA	Pan, Haibo,et al."Aridity Threshold Induces Abrupt Change of Soil Abundant and Rare Bacterial Biogeography in Dryland Ecosystems".MSYSTEMS 7.1(2022).