加快全球植物果实类超级网络的同质化
Evan C Fricke1, Jens-Christian Svenning2,3
1National Socio-Environmental Synthesis Center (SESYNC), University of Maryland, Annapolis, MD, USA. efricke@sesync.org.
Nature
|September 4, 2020
概括
人类引入的物种正在通过破坏生态网络, 这种趋势正在加速,减少生物多样性和生态系统的弹性.
科学领域:
- 生态学
- 生物地理
- 保护生物学
背景情况:
- 人类活动正在跨越生物地理障碍物引入物种,导致全球物种同质化.
- 引入物种对生态网络和全球生物地理模式的影响尚未得到充分的了解.
研究的目的:
- 量化评估引入物种对互惠种子传播网络的全球影响.
- 了解物种引入如何改变生态网络结构和生物地理模式.
主要方法:
- 分析410个局部网络的种子分散相互作用.
- 包括1,631种动物和3,208种植物之间的24455种对交互.
- 检查全球元网络结构,β多样性和模块化.
主要成果:
- 种类引入减少了全球超级网络的生物地理细分.
- 引入的物种降低了局部网络中的β多样性和网络模块化.
- 引入的相互作用的发生率在75年内增加了7倍,并且与人类环境的改变有关.
- 引入的物种与其他引入的物种发生不成比例的相互作用.
结论:
- 种类的引入正在推动生物同质化和改变共同进化的环境.
- 这些变化可能会降低生态系统的弹性,并在未来扩大同质化.
- 管理策略对于应对日益增长的生态复杂性的同质化至关重要.
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