迁徙天单独调整它们的秋季迁徙和冬季范围,以适应气候变暖
Hans Linssen1,2, E Emiel van Loon1, Judy Z Shamoun-Baranes1
1Theoretical and Computational Ecology Group, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands.
Global change biology
|October 5, 2023
概括
贝维克天根据温度变化改变秋季迁徙和冬季停留距离. 温暖的冬季正在导致这些候鸟在繁殖场附近过冬,证明了气候变化适应能力.
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
- 动物迁徙 动物迁徙
背景情况:
- 迁徙动物调整迁徙时间和路线,以适应适当的环境条件,特别是在春季和繁殖季节.
- 温度对秋季迁徙和随后的冬季范围转移的影响不太清楚.
- 自1970年以来,西旧北极地区的贝维克天已经将其冬季范围转移到明显接近繁殖场,这一现象被称为"短暂停留".
研究的目的:
- 量化温度与贝维克天每日秋季运动之间的关系.
- 为了确定温度如何影响每年的冬季距离繁殖场的距离.
- 为了研究个人灵活性在应对气候变暖的过程中所扮演的角色,推动观测范围的变化.
主要方法:
- 利用多年的GPS跟踪数据来追踪西北极贝维克的天.
- 分析了与当代温度数据相关的每日秋季运动模式.
- 与12月至1月平均气温相对应的每年从繁殖场过冬的距离.
主要成果:
- 贝维克天的秋季迁徙运动主要是由温度下降所驱动的,显著的运动发生在零度以下.
- 个体冬季距离显示出相当大的灵活性,直接响应冬季温度.
- 12月至1月平均气温上升1°C,相当于冬季平均距离离繁殖场更近118公里.
结论:
- 贝维克天冬季范围的观察到的变化在很大程度上是由个体对气候变暖的反应驱动的.
- 个体在迁徙和过冬行为的灵活性是物种适应不断变化的气候条件的关键因素.
- 了解秋季迁徙动态和冬季范围可塑性对于预测气候变化对迁徙物种的影响至关重要.
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