通过大规模气候气候对动物种群动态的同步
Eric Post1, Mads C Forchhammer
1Department of Biology, The Pennsylvania State University, 208 Mueller Lab, University Park, Pennsylvania 16802, USA. esp10@psu.edu
Nature
|November 15, 2002
概括
气候变化可以在很远的距离上同步动物种群. 北大西洋振荡 (NAO) 在格陵兰岛的鹿和牛种群中推动了同步动态,排除了当地相互作用.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 人口动态 人口动态
背景情况:
- 气候变化影响动物种群动态,如果它们的动态与环境相关,可能会导致多个种群的同时反应.
- 北大西洋振荡 (NAO) 是一个主要的气候系统,影响北半球的天气,具有相关的区域影响.
- 同步的人口波动通常归因于分散或热带相互作用,混大规模气候的影响.
研究的目的:
- 调查大型气候系统,特别是NAO,是否可以在相当大的地理距离上同步不同物种的种群动态.
- 测试动物种群动态可以与气候同步,独立于分散或生态相互作用的假设.
主要方法:
- 分析了格陵兰岛各地大鹿和牛的种群动态数据.
- 与北大西洋振荡 (NAO) 指数相关的人口波动.
- 评估了两种物种种群之间的空间同步,两种物种被超过1000公里的内陆冰区分开.
主要成果:
- 在鹿和香牛的种群动态中观察到空间同步.
- 这种同步与NAO指数有显著的相关性.
- 在被广泛的内陆冰区隔开的鹿和牛种群之间明显存在跨物种同步,排除了分散或直接的生态相互作用.
结论:
- 北大西洋振荡 (NAO) 同步了格陵兰岛的鹿和香牛的种群动态.
- 这些发现表明,大规模的气候模式可以在广的地理区域推动不同物种的同步人口变化.
- 动物群体,即使是不同的物种,也可以同步响应全球气候变化,而不管当地的生态联系.
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