气候变化破坏了微生物互惠主义驱动的人口持久性
Vicki W Li1, Joshua C Fowler2, Aaron S David3
1Department of Biology, University of Miami, Coral Gables, FL, USA. vwl6@miami.edu.
Nature ecology & evolution
|January 6, 2026
概括
微生物互惠,如Epichloë真菌和宿主草,增强植物种群的持久性和生存,特别是在干旱的情况下. 然而,在高气候变化下,这些重要关系可能会崩,影响物种分布.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物与微生物的相互作用
背景情况:
- 了解物种相互作用是预测人口动态和对全球变化的反应的关键.
- 微生物相互性可以影响大规模的植物持久性,特别是通过减轻干旱等环境压力因素.
研究的目的:
- 研究如何微生物互惠,特别是Epicloë真菌内,促进长期,范围广泛的宿主草的持久性, Bromus laevipes.
- 评估气候变化对这些相互关系的普遍性和有效性的影响.
主要方法:
- 整合了大约90个 Bromus laevipes 种群的 13 年范围广泛的现场调查.
- 利用基于6年的共同花园实验在宿主草的分布上的人口模型.
- 与气候变异性相关的量化内生植物的流行率和种群灭绝率.
主要成果:
- 互惠的Epicloë内植物显著促进了Bromus laevipes的种群级持续性和生长.
- 非互惠的群体比互惠的群体更有可能经历本地灭绝的可能性是四倍.
- 在经历过高度气候变化的历史互惠群体中,内细胞的发病率下降了八倍.
结论:
- 互惠主义对于支人口持续性和缓冲植物对抗环境压力至关重要.
- 这些相互关系容易受到全球变化的影响,特别是气候变化.
- 互惠主义的潜在衰退对植物种群的长期生存能力和物种分布有重大影响.
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