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Key bacterial, fungal, and protist taxa regulate nutrient availability during vegetation restoration under different climate conditions in karst soil
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  • Dan Xiao,
  • Xunyang He,
  • Wei Zhang,
  • Peilei Hu,
  • Mingming Sun,
  • Kelin Wang
Dan Xiao
Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China

Corresponding Author:[email protected]

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Xunyang He
Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
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Wei Zhang
Institute of Subtropical Agriculture, Chinese Academy of Sciences
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Peilei Hu
Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
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Mingming Sun
Huazhong Agricultural University, Wuhan, 430070, China
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Kelin Wang
Institute of Subtropical Agriculture, Chinese Academy of Sciences
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Abstract

To determine the mechanisms underlying the response of microbial interactions to vegetation restoration under different climate conditions, we examined the changes occurring at two temperature levels in soil bacterial, fungal, and protist microbiomes under a reference cropland and a plantation forest and a shrubland. Bacterial and protist diversity levels in the high-temperature region of Guangxi (20.9 °C) were higher in cropland than in shrubland or plantation forest. By contrast, fungal richness was lower under cropland than shrubland. The bacterial phyla Cyanobacteria, Gemmatimonadetes, and Nitrospirae, the fungal taxa Ascomycota and Mucoromycota, and the protist groups Ciliophora, Lobosa, and Ochrophyta had lower abundance under vegetation restoration than cropland. There were no significant differences between shrubland and plantation forest in terms of bacterial, fungal, or protist diversity or community composition. A co-occurrence network revealed higher numbers of correlated links among bacterial, fungal, and protist taxa in the low-temperature region of Guizhou (14.6 °C) than Guangxi. Stronger interactions were observed among microbial taxa under cropland than under vegetation restoration. Protist groups Cercozoa and Lobosa showed the highest numbers of links with bacterial phyla Acidobacteria and Proteobacteria and with fungal phylum Ascomycota. Hence, a strong food web existed among these microbiomes. Proteobacteria, Acidobacteria, Ascomycota, and Cercozoa were correlated with soil nutrient levels. Therefore, these dominant taxa determined nutrient availability. The predation of bacteria and fungi by protists was more intense at low temperature than high temperature. Key bacterial, fungal, and protist groups, their co-occurrence networks, and environmental temperature influence soil nutrient accumulation during vegetation restoration.
20 Sep 2021Submitted to Land Degradation & Development
20 Sep 2021Submission Checks Completed
20 Sep 2021Assigned to Editor
26 Sep 2021Reviewer(s) Assigned
03 Oct 2021Review(s) Completed, Editorial Evaluation Pending
13 Oct 2021Editorial Decision: Revise Major
07 Nov 20211st Revision Received
08 Nov 2021Submission Checks Completed
08 Nov 2021Assigned to Editor
26 Nov 2021Review(s) Completed, Editorial Evaluation Pending
19 Dec 2021Editorial Decision: Revise Major
31 Dec 20212nd Revision Received
03 Jan 2022Submission Checks Completed
03 Jan 2022Assigned to Editor
13 Jan 2022Review(s) Completed, Editorial Evaluation Pending
22 Jan 2022Editorial Decision: Revise Minor
29 Jan 20223rd Revision Received
31 Jan 2022Submission Checks Completed
31 Jan 2022Assigned to Editor
16 Feb 2022Review(s) Completed, Editorial Evaluation Pending
27 Feb 2022Editorial Decision: Accept