Scholarlink

<p>Soil microorganisms play important roles in sustaining ecosystem services and functions. However, information regarding how vegetation restoration affects the soil bacterial community and networks through the soil physicochemical properties remains limited in karst areas. In this study, soil samples at the 0–10 cm layer were collected from three vegetation types, namely, managed forest (MF), natural forest (NF), and cropland (CL, referenced). Results showed that vegetation restoration shifted the soil bacterial community composition but had an insignificant effect on alpha diversity (<i>P</i> &gt;0.05). The dissimilarities in bacterial community composition between CL and NF were more distinct than those between MF and CL. Vegetation restoration decreased the total nodes, total edges, and average degree but increased the ratios of positive to negative edges. Although the dominant phyla <i>Acidobacteriota</i>, <i>Actinobacteriota</i>, and <i>Proteobacteria</i> in the co-occurrence networks did not vary across vegetation restoration types, the keystone species changed after vegetation restoration. Such diverse responses of bacterial communities and networks to vegetation restoration were primarily associated with variations in soil organic carbon (SOC), total nitrogen (TN), and exchangeable calcium (Ca). The SOC, TN, and Ca contents significantly increased by 25.3%, 24.8%, and 49.2% in MF and by 50.6%, 46.1%, and 37.6% in NF compared with those in CL (<i>P</i> &lt;0.05), respectively. Overall, vegetation restoration improved the soil nutrient environment, such as SOC, TN, and Ca, remarkably altered soil bacterial communities, and promoted cooperation in ecological networks.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Alterations in Soil Properties Resulting from Vegetation Restoration Change Bacterial Communities and Networks in Karst Canyon, Southwestern China

  • 期刊论文

  • 发表日期：

    2026年1月4日

查看全文
  • Jiacheng Lan,
  • Yongxiang Jiang,
  • Mingzhi Huang,
  • Shasha Wang

摘要

Soil microorganisms play important roles in sustaining ecosystem services and functions. However, information regarding how vegetation restoration affects the soil bacterial community and networks through the soil physicochemical properties remains limited in karst areas. In this study, soil samples at the 0–10 cm layer were collected from three vegetation types, namely, managed forest (MF), natural forest (NF), and cropland (CL, referenced). Results showed that vegetation restoration shifted the soil bacterial community composition but had an insignificant effect on alpha diversity (P >0.05). The dissimilarities in bacterial community composition between CL and NF were more distinct than those between MF and CL. Vegetation restoration decreased the total nodes, total edges, and average degree but increased the ratios of positive to negative edges. Although the dominant phyla Acidobacteriota, Actinobacteriota, and Proteobacteria in the co-occurrence networks did not vary across vegetation restoration types, the keystone species changed after vegetation restoration. Such diverse responses of bacterial communities and networks to vegetation restoration were primarily associated with variations in soil organic carbon (SOC), total nitrogen (TN), and exchangeable calcium (Ca). The SOC, TN, and Ca contents significantly increased by 25.3%, 24.8%, and 49.2% in MF and by 50.6%, 46.1%, and 37.6% in NF compared with those in CL (P <0.05), respectively. Overall, vegetation restoration improved the soil nutrient environment, such as SOC, TN, and Ca, remarkably altered soil bacterial communities, and promoted cooperation in ecological networks.