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Spatial Variation of Microbial Community Structure and Its Driving Environmental Factors in Two Forest Types in Permafrost Region of Greater Xing′an Mountains

Author

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  • Dandan Song

    (College of Geographical Sciences, Harbin Normal University, Harbin 150025, China)

  • Yuanquan Cui

    (Personnel Department, Harbin Normal University, Harbin 150025, China)

  • Dalong Ma

    (College of Geographical Sciences, Harbin Normal University, Harbin 150025, China)

  • Xin Li

    (College of Geographical Sciences, Harbin Normal University, Harbin 150025, China)

  • Lin Liu

    (College of Geographical Sciences, Harbin Normal University, Harbin 150025, China)

Abstract

Climate warming is accelerating permafrost degradation. Soil microorganisms play key roles in the maintenance of high-latitude permafrost regions and forest ecosystems’ functioning and regulation of biogeochemical cycles. In this study, we used Illumina MiSeq high-throughput sequencing to investigate soil bacterial community composition at a primeval Larix gmelinii forest and a secondary Betula platyphylla forest in a permafrost region of the Greater Xing’an Mountains. The Shannon diversity index tended to decrease and then increase with increasing soil depth, which was significantly higher in the L. gmelinii forest than in the B. platyphylla forest at 40–60 cm. Proteobacteria (19.86–29.68%), Acidobacteria (13.59–31.44%), Chloroflexi (11.04–27.19%), Actinobacteria (7.05–25.57%), Gemmatimonadetes (1.76–9.18%), and Verrucomicrobia (2.03–7.00%) were the predominant phyla of the bacterial community in two forest types. The relative abundance of Proteobacteria showed a decreasing trend in the B. platyphylla forest and an increasing trend in the L. gmelinii forest, whereas that of Chloroflexi increased and then decreased in the B. platyphylla forest and decreased in the L. gmelinii forest with increasing soil depth. The relative abundance of Acidobacteria was significantly higher in the B. platyphylla forest than in the L. gmelinii forest at 0–20 cm depth, whereas that of Actinobacteria was significantly higher in the L. gmelinii forest than in the B. platyphylla forest at 0–20 cm and 40–60 cm depth. Principal coordinate analysis (PCoA) and two-way analysis of variance (ANOVA) indicated that microbial community composition was more significantly influenced by forest type than soil depth. Redundancy analysis (RDA) showed that microbial community structure was strongly affected by soil physicochemical properties such as nitrate nitrogen (NO3−-N), pH, and total organic carbon (TOC). These results offer insights into the potential relationship between soil microbial community and forest conversion in high latitude permafrost ecosystems.

Suggested Citation

  • Dandan Song & Yuanquan Cui & Dalong Ma & Xin Li & Lin Liu, 2022. "Spatial Variation of Microbial Community Structure and Its Driving Environmental Factors in Two Forest Types in Permafrost Region of Greater Xing′an Mountains," Sustainability, MDPI, vol. 14(15), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:15:p:9284-:d:874634
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    References listed on IDEAS

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    1. Xiaodan Wang & Hua Ma & Chunyun Guan & Mei Guan, 2022. "Decomposition of Rapeseed Green Manure and Its Effect on Soil under Two Residue Return Levels," Sustainability, MDPI, vol. 14(17), pages 1-13, September.
    2. Lin Liu & Zhongliang Wang & Dalong Ma & Man Zhang & Lingyu Fu, 2022. "Diversity and Distribution Characteristics of Soil Microbes across Forest–Peatland Ecotones in the Permafrost Regions," IJERPH, MDPI, vol. 19(22), pages 1-15, November.

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