生物多样性增加了生态系统对极端气候变化的抵抗力
Forest Isbell1, Dylan Craven2,3, John Connolly4
1Department of Ecology, Evolution and Behavior, University of Minnesota Twin Cities, Saint Paul, Minnesota 55108, USA.
Nature
|October 16, 2015
概括
生物多样性增强了生态系统对极端气候的抵抗力,稳定了生产力. 生物多样性主要是缓冲气候影响,而不是事件后的恢复.
科学领域:
- 生态学
- 环境科学
- 气候变化生物学
背景情况:
- 生态系统对抗极端气候的稳定性至关重要,
- 之前关于生物多样性在缓冲气候事件中的作用的研究产生了不同的结果.
研究的目的:
- 调查草原植物的生物多样性是否增强了生态系统对气候事件的抵抗力和适应力.
- 量化生物多样性在气候变化期间和之后对生态系统生产力的影响.
主要方法:
- 对46个操纵草原植物多样性的实验进行了元分析.
- 根据各种气候事件 (干旱,潮湿,极端,长期) 评估生态系统生产力的变化.
主要成果:
- 生物多样性在各种气候事件中显著增加了生态系统的抵抗力.
- 高多样性群体 (16-32个物种) 显示出约25%的生产力变化,而低多样性群体 (1-2个物种) 显示出约50%的变化.
- 生态系统弹性 (事件后恢复) 没有显著依赖生物多样性.
结论:
- 生物多样性主要通过增加对气候事件的抵抗力来稳定生态系统的生产力.
- 生物多样性丧失可能会降低生态系统的稳定性,
- 这突显了生物多样性在气候变化下维持生态系统服务的重要性.
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