半自然石灰岩草原的动态阶段的土壤社区组成
A Y Ayesh Piyara Wipulasena1, John Davison1, Aveliina Helm1
1Department of Botany, Institute of Ecology and Earth Sciences, Faculty of Science and Technology, University of Tartu, Tartu, Estonia.
PloS one
|October 17, 2023
概括
欧洲阿尔瓦尔草原的恢复表明,真菌群落比植物群落更快地响应放牧管理. 这表明,微生物的转移可能会在这些独特的,物种丰富的息地中先恢复植被.
科学领域:
- 生态生态学 生态生态学
- 微生物学 微生物学
- 保护生物学 保护生物学
背景情况:
- 欧洲干薄土质石灰岩草原 (alvars) 是物种丰富的息地,受到传统管理的停止的威胁,导致林地侵占和生物多样性丧失.
- 土壤微生物群落对生态系统动态至关重要,但它们在不同草原相继阶段的组成和功能需要进一步调查.
- 了解这些动态是有效恢复阿尔瓦尔生态系统的关键.
研究的目的:
- 评估恢复的爱沙尼亚阿尔瓦尔草原的土壤真菌, prokaryotic 和植物群落的组成.
- 调查不同程度的木材侵占和恢复管理 (放牧) 如何影响这些社区.
- 为了比较微生物和植物群落对管理干预措施的响应率.
主要方法:
- 利用土壤环境DNA (eDNA) 分析来分析真菌, prokaryotic 和植物社区.
- 在修复的草原上比较社区组成,树木侵占和管理的历史不同.
- 分析了与生态系统状态和管理历史有关的组成变化和功能结构.
主要成果:
- 在各个分类学群体中观察到不同的组成模式,以前的森林地区与经营的开放草原不同.
- 植物和真菌群落的功能结构反映了菌根类型的流行.
- 微生物群落 (真菌和 prokaryotic) 对放牧实施的反应比植物群落更明显,这表明在恢复过程中微生物的适应速度更快.
结论:
- 土壤微生物群落,特别是真菌,对恢复牧场管理的反应比阿尔瓦尔草原的植物群落要快.
- 这种不同的响应率可能表明生态系统歇斯底里,即恢复轨迹与放弃轨迹不同.
- 这些发现强调了在草原恢复战略的设计和评估中考虑微生物社区动态的重要性.
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