尽管气候变化加速,但短期物种周转率普遍放缓
Emmanuel C Nwankwo1, Axel G Rossberg2
1Centre for Biodiversity and Sustainability, School of Biological and Behavioral Sciences, Queen Mary University of London, London, UK.
Nature communications
|February 3, 2026
概括
物种组成的变化,称为时间物种周转,通常归因于环境驱动因素. 然而,这项研究发现,在过去的一个世纪中,大多数社区的物种周转率已经放缓,这表明生态系统内在动态起着重要作用.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 生物多样性研究 生物多样性研究
背景情况:
- 生态社区的物种组成随着时间的推移而发生变化,称为时间物种周转.
- 环境驱动因素通常被认为是这些变化的原因.
- 然而,内在的生态系统动态也可以推动物种的时间周转,即使在稳定的环境中.
研究的目的:
- 调查环境驱动因素与内在生态系统动态对观察到的物种周期的相对贡献.
- 通过使用全球数据库,分析过去一个世纪物种流动的趋势.
主要方法:
- 分析BioTIME数据库,这是一个全球生态调查数据集合.
- 在许多社区中对短时间间隔 (1-5年) 的时间物种周转率的检查.
- 观察到的营业额趋势与基于环境变化加速与内在动态的预测进行比较.
主要成果:
- 与气候变化加速物种交换的预期相反,在过去的100年里,物种交换在大多数社区下降了.
- 这种减速是显著的,通常是三分之一.
- 这些发现表明,生态系统的内在动态是许多观察到的物种组成变化的主导因素.
结论:
- 在物种组成中观察到的变化往往可能是自然,内在生态系统动态的表现,而不是仅仅是环境驱动因素.
- 营业额的减速可能与人为环境退化或减少区域物种池限制殖民者等因素有关.
- 仅将物种周转率归因于环境驱动因素需要谨慎,尤其是在当前的背景下,内在动态似乎普遍存在.
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