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  • He, HaoranNorthwest A&F University (author)

Linking soil depth to aridity effects on soil microbial community composition, diversity and resource limitation

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023
  • 14 s.

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  • LIBRIS-ID:oai:lup.lub.lu.se:faed4bd3-d18f-4595-acb1-7053b6eb8d47
  • https://lup.lub.lu.se/record/faed4bd3-d18f-4595-acb1-7053b6eb8d47URI
  • https://doi.org/10.1016/j.catena.2023.107393DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • With ongoing climate change, aridity is increasing worldwide, affecting biodiversity and ecosystem function in drylands. However, how the depth-profile microbial community structure and metabolic limitations change along aridity gradients are still poorly explored. Here, 16S rRNA and ITS amplicon sequencing and ecoenzymatic stoichiometry analysis were used to investigate both bacterial and fungal diversities and resource limitations in 1 m depth profiles across a wide aridity gradient (0.51–0.78) in a semiarid region. Results showed a sharp decrease in microbial diversity with soil depth, accompanied by an increase in microbial phosphorus (P) vs. N (nitrogen) limitation and a decrease in microbial carbon (C) vs. nutrient limitation. Aridity led to a strong shift in microbial community composition, but aridity has a threshold effect on microbial resource limitation through impacts on soil pH and C/P or N/P. When the aridity threshold (1-precipitation/evapotranspiration) exceeds 0.65, relationship between aridity and microbial resource demand was decoupled; but at aridity threshold = 0.65, microbial relative C limitation and C-acquiring enzyme activity dropped. These results suggest that aridity might have a stronger influence on microbial community composition, than on diversity, shaped by inherent soil biotic factors (i.e., MBC:MBP or MBN:MBP). These findings suggest that soil microbial diversity or enzymatic stoichiometry may be not necessary to mirror changes in water availability in the drylands, while aridity would be well explained by microbial community composition.

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  • Xu, MingzheNorthwest A&F University,University of the Chinese Academy of Sciences (author)
  • Li, WentingNorthwest A&F University (author)
  • Chen, LiNorthwest A&F University (author)
  • Chen, YananUniversity of the Chinese Academy of Sciences,Northwest A&F University (author)
  • Moorhead, Daryl L.University of Toledo (author)
  • Brangarí, Albert C.Lund University,Lunds universitet,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Mikrobiologisk ekologi,Forskargrupper vid Lunds universitet,Mikrobiell biogeokemi i Lund,Centre for Environmental and Climate Science (CEC),Faculty of Science,Microbial Ecology,Lund University Research Groups,Microbial Biogeochemistry in Lund(Swepub:lu)al6137br (author)
  • Liu, JiCentral China Normal University (CCNU) (author)
  • Cui, YongxingPeking University (author)
  • Zeng, YiNorthwest A&F University,University of the Chinese Academy of Sciences (author)
  • Zhang, ZhiqinNorthwest A&F University (author)
  • Duan, ChengjiaoUniversity of the Chinese Academy of Sciences,Northwest A&F University,Shanxi Agricultural University (author)
  • Huang, MinWuhan University of Technology (author)
  • Fang, LinchuanUniversity of the Chinese Academy of Sciences,Northwest A&F University (author)
  • Northwest A&F UniversityUniversity of the Chinese Academy of Sciences (creator_code:org_t)

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  • In:Catena2320341-8162

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