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人类踩踏土壤对土壤微生物群落的影响 扬州城市森林公园的微生物群落聚集
Jingwei Lian1,2, Liwen Li3, Xin Wan1,2
1Jiangsu Academy of Forestry, Nanjing 211153, China.
Microorganisms
|December 31, 2025
概括
人类践踏改变了城市森林中的土壤特性和微生物群落. 增加的踩踏强度会放大细菌和真菌群体中的随机过程,影响生态系统管理.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 人类踩踏在城市森林中是一个越来越大的问题,但它对土壤微生物社区聚集的影响还不太清楚.
- 了解这些影响对于管理和恢复城市生态系统至关重要.
研究的目的:
- 调查人类践踏土壤物理化学性质和微生物社区聚集在珠元风景区的人类践踏的影响.
- 分析随机和决定性过程在不同践踏强度下塑造细菌和真菌群落中的作用.
主要方法:
- 在朱元景区进行实地研究,使用不同强度的践踏 (控制,轻,重).
- 分析土壤的物理化学性质 (例如,土壤散装密度).
- 应用中性和零社区模型来评估细菌和真菌的微生物社区组装过程.
主要成果:
- 践踏土壤显著改变了土壤的物理化学特性和微生物多样性.
- 与对照地块相比,轻度踩踏地块的真菌丰富度明显较低.
- 轻轻的踩踏增强了细菌聚集中的随机性,而重重的踩踏减少了它;增加踩踏加剧了真菌聚集的随机性.
- 细菌群体主要是由异质选择形成的,而真菌群体主要受到分散限制的影响.
结论:
- 人类的践踏是一种重大干扰,它改变了城市森林中的土壤条件和微生物社区结构.
- 随机过程在微生物群体的聚集中起着关键作用,其影响因微生物群体和践踏强度而异.
- 结果为城市森林公园面临践踏压力的生态管理和恢复策略提供了理论基础.
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