Abstract
Soil bacteria play important roles in regulating biogeochemical cycles and maintaining ecosystem function. However, our knowledge of patterns and driving factors of permafrost microbial communities under typical alpine meadow habitats with different vegetation communities is limited. We analyzed the relationship between soil bacterial community and changes of environmental factors among four habitats (swamp wetland, swamp meadow, meadow, and mature meadow) with different dominant vegetation types on the eastern edge of Qinghai-Tibetan, China. The results showed that though the bacterial community composition among four habitats was similar, the proportions of dominant species and the bacterial biomarkers in each habitat were unique. The bacterial community structure of mature meadow was obviously distinct from the other three habitats, which derived from the significant difference in soil nutrients and shoot biomass compared to the others. Specifically, distance-based redundancy analysis showed that soil total nitrogen and soil water content explained the greatest difference in bacterial structures, followed by soil temperature, pH and shoot biomass. Different habitats formed various network patterns, which showed more significant connections in swamp meadow and meadow than swamp wetland and mature meadow. Rhizomicrobium, Pseudonocardia, Geobacter, Bryobacter, Syntrophorhabdus, Nitrospira, Solirubrobacter and Pedomicrobium were the most important keystone genera in the bacterial co-occurrence networks.
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Data Availability
All data and material produced from this study were provided in this manuscript. The datasets presented in this study can be found in online repositories. The names of the repository and accession number can be found below: https://www.ncbi.nlm.nih.gov/, PRJNA683866.
Code Availability
All codes in this study are available.
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Acknowledgements
We are grateful to Yunpeng Zhao, Mengjing Hou, Jinlong Gao from Lanzhou University for sampling. We thank Ningbo Wang from Beijing Allwegene Technology Co., Ltd., China for Sequencing, Dongjie An and Ye Xiao from Majorbio Technology Co., Ltd., China, and Yuyao Wang from the College of Forestry of Beijing Forestry University for providing technical supports.
Funding
This study was funded by the National Key R&D Program of China, “Research and Demonstration of Ecological Restoration Technology for Degraded Alpine Wetland” (2017YFC0504802).
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RW designed the study, performed the field investigation and collected the data, conducted the statistical analysis and wrote the manuscript. MW conducted the statistical analysis, reviewed and edited the manuscript. JW performed the field investigation and collected the data. JHY performed the field investigation and collected the data. XWL performed the field investigation and collected the data. YHL designed the study, reviewed and edited the manuscript. FKD designed the study, reviewed and edited the manuscript.
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Rui Wang and Miao Wang contributed to the work equally and should be regarded as co-first authors.
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Wang, R., Wang, M., Wang, J. et al. Soil Bacterial Characteristics Under Four Habitats with Different Vegetation Communities on the Qinghai-Tibetan Plateau. Wetlands 41, 58 (2021). https://doi.org/10.1007/s13157-021-01455-0
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DOI: https://doi.org/10.1007/s13157-021-01455-0