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Erosion reduces soil microbial diversity, network complexity and multifunctionality

Liping QiuCAS Center for Excellence in Quaternary Science and Global Change , Xi’an, Shaanxi, ChinaQian ZhangBioTechnology Institute, University of Minnesota , St. Paul, MN, USAHansong ZhuCollege of Natural Resources and Environment, Northwest A&F University , Yangling, Shaanxi, ChinaPeter B. ReichDepartment of Forest Resources, University of Minnesota , St. Paul, MN, USASamiran BanerjeeDepartment of Microbiological Sciences, North Dakota State University , Fargo, ND, USAMarcel G. A. van der HeijdenAgroscope, Department of Agroecology & Environment , Zürich, SwitzerlandMichael J. SadowskyBioTechnology Institute, University of Minnesota , St. Paul, MN, USASatoshi IshiiBioTechnology Institute, University of Minnesota , St. Paul, MN, USAXiaoxu JiaKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing, ChinaMingan ShaoKey Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences , Beijing, ChinaBaoyuan LiuState Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University , Yangling, Shaanxi, ChinaHuan JiaoCollege of Natural Resources and Environment, Northwest A&F University , Yangling, Shaanxi, ChinaHaiqiang LiCollege of Natural Resources and Environment, Northwest A&F University , Yangling, Shaanxi, ChinaXiaorong WeiCAS Center for Excellence in Quaternary Science and Global Change , Xi’an, Shaanxi, China

2021en

ABI

Annotatsiya

While soil erosion drives land degradation, the impact of erosion on soil microbial communities and multiple soil functions remains unclear. This hinders our ability to assess the true impact of erosion on soil ecosystem services and our ability to restore eroded environments. Here we examined the effect of erosion on microbial communities at two sites with contrasting soil texture and climates. Eroded plots had lower microbial network complexity, fewer microbial taxa, and fewer associations among microbial taxa, relative to non-eroded plots. Soil erosion also shifted microbial community composition, with decreased relative abundances of dominant phyla such as Proteobacteria, Bacteroidetes, and Gemmatimonadetes. In contrast, erosion led to an increase in the relative abundances of some bacterial families involved in N cycling, such as Acetobacteraceae and Beijerinckiaceae. Changes in microbiota characteristics were strongly related with erosion-induced changes in soil multifunctionality. Together, these results demonstrate that soil erosion has a significant negative impact on soil microbial diversity and functionality.

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DOI: 10.1038/s41396-021-00913-1

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