海洋表面温度的升温与海岸鸟类迁徙燃料负载的下降有关
Benjamin J Lagassé1, Greg A Breed1,2
1Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, AK, USA.
Royal Society open science
|July 18, 2024
概括
海洋表面温度 (SST) 的升温不成比例地影响年轻的海岸鸟,因为它减少了迁徙的猎物可用性. 成年人受影响较小,突出显示气候变化.
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
- 鸟类生态学 鸟类生态学
背景情况:
- 全球变暖,特别是海面温度上升,正在改变海洋生态系统.
- 潮间湿地是迁徙海岸鸟类的重要食地.
- 诸如年龄等因素对鸟对气候变化反应的影响还不太清楚.
研究的目的:
- 调查海面温度 (SST) 和年龄如何影响迁徙海岸鸟的燃料负载和迁徙成功.
- 确定与年龄相关的食技能是否介导着变暖对岸鸟种群的SST的影响.
主要方法:
- 用林 (Calidris alpina) 的形态测量来评估迁徙燃料负载.
- 在气候条件 (SST) 和个体年龄方面分析了燃料负载和性能数据.
- 这项研究检查了准备跨海迁徙超过3000公里的海岸鸟.
主要成果:
- 年轻的林在前一年的高SST之后显示了迁徙燃料负载的减少,这表明猎物可用性问题.
- 在最近的高SSTs下,与历史数据相比,高达45%的青少年可能已经完成了直飞到冬天的飞行.
- 成年Dunlin表现出一致的能力,通过不间断飞行在不同的SST条件到达冬季场地.
结论:
- 年轻的海岸鸟对气候变化对猎物资源的影响不成比例地脆弱.
- 变暖的SSTs通过影响幼鸟的生存和迁徙的成功,对迁徙的岸鸟种群构成重大威胁.
- 这项研究为气候变化如何影响全球候鸟种群提供了一个机制.
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