鸟类迁徙现象的变化不能弥补春秋期间路线条件的变化
Carrie Ann Adams1, Monika A Tomaszewska2, Geoffrey M Henebry2,3
1Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado, USA.
Ecology
|May 19, 2025
概括
鸟类迁徙的时间受温度和植被变化的影响. 迁徙鸟类无法跟上气候变化的步伐,导致它们在旅途中潜在的资源不匹配.
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:
- 鸟类迁徙的时间受各种环境因素的影响.
- 气候变化和移民现象学的相互作用,特别是关于资源的可用性,仍然不太清楚.
- 缺乏跨季的多个环境驱动因素的同时比较.
研究的目的:
- 研究温度,土地表面现象学,植被绿色和相对湿度对春秋鸟类迁徙时间的影响.
- 确定迁移现象学的长期变化是否与不断变化的气候条件保持同步.
- 评估因气候变化而导致的鸟类迁徙和资源可用性之间的潜在异步.
主要方法:
- 估计的春季和秋季迁徙过境日期 (10%,50%,90%) 使用来自53个美国中央飞道天气监测雷达站的数据.
- 分析了与温度,绿化/休眠时间,相对湿度和增强的植被指数 (EVI) 相关的迁移现象学的年度变化.
- 评估了环境条件的十年趋势,并评估了迁移现象学转移是否弥补了这些变化.
主要成果:
- 春季迁徙现象学主要受到温度异常的影响,在温暖的年份更早地过渡.
- 秋季迁移的时间与更温暖,更潮湿的年份,更高的EVI和更晚的休眠期有关.
- 长期的迁移现象学调整并没有完全弥补环境条件的变化;春季通道进展,但发生在更接近绿色,秋季通道变暖.
结论:
- 鸟类迁徙现象因应气候变化而发生变化,但这些调整不足以保持与环境条件的同步.
- 鸟类迁徙和资源可用性之间的潜在异步,特别是在秋季,可能会影响候鸟.
- 需要进一步的研究来了解这些不匹配对鸟类种群的长期后果.
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