Stochastic community assembly of abundant taxa maintains the relationship of soil biodiversity-multifunctionality under mercury stress

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外文摘要：·Soil abundant taxa diversity positively related to multifunctionality under Hg stress.·Microbial network complexity of soil abundant taxa supported the strength of SBF.·Stochastic assembly of soil abundant subcommunity supported the strength of SBF.·Stochastic ratio was the most important predictor for the strength of SBF.It is known that soil microbial communities are intricately linked to multiple ecosystem functions and can maintain the relationship between soil biodiversity and multifunctionality(SBF)under environmental stresses.However,the relative contributions and driving forces of abundant and rare taxa within the communities in maintaining soil biodiversity-multifunctionality rela-tionship under pollution stresses are still unclear.Here,we conducted microcosm experiments to estimate the importance of soil abundant and rare taxa in predicting these relationships under heavy metal mercury(Hg)stress in paired paddy and upland fields.The results revealed that the diversity of abundant taxa,rather than rare taxa,was positively related to multifunctionality,with the abundant subcommunity tending to maintain a larger proportion of soil functions including chitin degradation,protein degradation,and phosphorus mineralization.Soil multitrophic network complexity consisting of abundant species showed positive correlations with biodiversity and multifunctionality,and supported the strength of SBF within a network complexity range.Stochastic assembly processes of the abundant subcommunity were positively correlated with the strength of SBF,although stochastic processes decreased the biodiversity and the multifunctionality,respectively.After simultaneously accounting for multiple factors on the strength of SBF,we found that the stochastic community assembly ratio of abundant taxa was the most important predictor for SBF strength under Hg stress.Our results highlight the importance of abundant taxa in supporting soil multifunctionality,and elucidate the linkages between community assembly,network complexity and SBF relationship under environmental stresses.

外文关键词：

abundant taxabiodiversity-multifunctionality relationshipcommunity assemblynetwork complexityenvironmental stresses

作者：

Shuai Du、Xin-Qi Li、Li Bi、Dong Zhu、Hang-Wei Hu、Xiuli Hao、Jiao Feng、Qiaoyun Huang、Yu-Rong Liu

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作者单位：

Key Laboratory of Urban Environment and Health,Ningbo Urban Environment Observation and Research Station,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China

College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China

School of Agriculture and Food,Faculty of Veterinary and Agricultural Sciences,The University of Melbourne,Parkville,VIC 3010,Australia

Hubei Key Laboratory of Soil Environment and Pollution Remediation,Huazhong Agricultural University,Wuhan 430070,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hubei Province,China

项目编号：

42177022418771202020CFA013

出版年：

2024

DOI：

10.1007/s42832-023-0197-z

土壤生态学快报(英文)

ISSN：

年,卷(期)：2024.6(2)