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Slope gradient but not slope position affecting microbial community composition in the cropland of typical black soil region
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  • lei sun,
  • Abdul Hakim Jamshidi,
  • Yong Niu,
  • Xia Liu,
  • Zhaofei Fan,
  • Wenying Yi,
  • Shouhao Zhang
lei sun
Co-Innovation Center for Sustainable Forestry in Southern China Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration Nanjing Forestry University Nanjing Jiangsu 210037 China

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Abdul Hakim Jamshidi
Co-Innovation Center for Sustainable Forestry in Southern China Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration Nanjing Forestry University Nanjing Jiangsu 210037 China
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Yong Niu
College of Forestry Shandong Agricultural University Shandong 271018 China
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Xia Liu
Co-Innovation Center for Sustainable Forestry in Southern China Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration Nanjing Forestry University Nanjing Jiangsu 210037 China
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Zhaofei Fan
Auburn University School of Forestry and Wildlife Sciences
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Wenying Yi
Co-Innovation Center for Sustainable Forestry in Southern China Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration Nanjing Forestry University Nanjing Jiangsu 210037 China
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Shouhao Zhang
Co-Innovation Center for Sustainable Forestry in Southern China Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration Nanjing Forestry University Nanjing Jiangsu 210037 China
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Abstract

Soil microorganisms are the main driving force in soil ecological and biogeochemical processes, such as carbon mineralization, humus formation, and nutrient cycles. Soil erosion may dramatically alter microbial properties. However, it is still unclear how soil microbial characteristics affected by soil erosion. In hilly areas, soil erosion is highly attributed to topographic characteristics such as slope position and slope gradient. Herein, we compared the soil microbial characteristics between different slope gradients and positions in the farmland in the typical black soil area of Northeast China. The relative abundances of major microbial phyla are illustrated. Proteobacteria, Acidobacteria, Gemmatimonadetes, Planctomycetes, and Actinobacteria accounted for 83% of the total bacterial sequences, and Ascomycota, Basidiomycota, and chytridiomycosis accounted for 78% of total fungal sequences in the studied area. Microbial alpha-diversity (Bacteria and Fungi) was similar among the slope gradients or slope positions. The bacterial and fungal community composition was only affected by slope gradient, which was significantly lower in the highest slope gradient level than in others. This study suggests that slope gradient but not slope gradient affecting microbial community composition in the cropland of black soil region.