在全球植物群落中协调多样性和种群稳定之间的联系
Xiaobin Pan1, Yann Hautier1, Jan Lepš2,3
1Ecology and Biodiversity Group, Utrecht University, Padualaan 8, Utrecht, 3584 CH, the Netherlands.
The New phytologist
|January 17, 2026
概括
更多的物种可以破坏生态系统的稳定,尤其是占主导地位的种群. 当考虑累积物种丰富度和丰富度加权人口随时间的稳定性时,这种效应更为明显.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
背景情况:
- 生态稳定对于生态系统功能和社会利益至关重要.
- 生态理论表明,植物多样性可以破坏当地人口的稳定,但经验证据是混合的.
研究的目的:
- 调查生态理论与实证发现关于多样性-稳定性关系之间的差异.
- 测试不同的多样性指标 (平均与累积财富) 和稳定性指标 (丰富度未加权与加权) 如何影响观察到的关系.
主要方法:
- 分析了来自五大洲超过8000个永久植被地块的数据.
- 用丰富度加权和未加权人口稳定性指标比较多样性-稳定性关系.
- 评价平均年财富与累积财富随着时间的推移.
主要成果:
- 当使用丰度加权稳定性时,观察到负的多样性-稳定性关系,表明破坏稳定的效应,特别是在主导物种上.
- 累积丰富性与年平均丰富性相比,显示出更强大的破坏稳定的效应,突出显示了长期物种周转的影响.
- 增加的物种丰富度,加上物种间的竞争,往往会使全球的种群不稳定.
结论:
- 多样性和稳定性指标的选择对多样性-稳定性关系的解释产生了重大影响.
- 研究结果表明,更高的物种丰富程度可能导致全球自然生态系统中的人口不稳定.
- 主导物种似乎特别容易受到增加的生物多样性和竞争的破坏性影响.
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