避难所使用的温度和微气候会影响临灭绝的草原鸟类的迁徙时间
Rita F Ramos1,2,3,4,5, Aldina M A Franco6, James J Gilroy6
1CIBIO/InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Laboratório Associado, Universidade do Porto, Campus Agrário de Vairão, Vairão, 4485-661, Portugal. rita.ramos@uea.ac.uk.
Movement ecology
|December 2, 2023
概括
个别的小 (Tetrax tetrax) 显示出不同的迁移时间,受当地微气候和食物供应的影响,而不仅仅是大规模的线索. 微气候避难所和资源可以延长繁殖季节.
科学领域:
- 生态生态学 生态生态学
- 动物行为 动物行为
- 保护生物学 保护生物学
背景情况:
- 季节性资源的可用性会影响动物迁徙的时间和距离.
- 对环境线索的个体迁徙反应比人口层面的趋势了解得更少.
- 微气候变化可能导致迁移模式的个体差异,尽管存在类似的大规模条件.
研究的目的:
- 测试个人微气候条件是否会影响小鸟 (Tetrax tetrax) 的迁徙行为.
- 评估个体在迁移时间和距离上的一致性.
- 评估当地环境特征,包括微气候避难所,对迁移的影响.
主要方法:
- 在2009-2019年期间,利用了47只小 (67个繁殖事件) 的GPS跟踪数据.
- 综合跟踪数据与高分辨率的微气候和息地信息.
- 分析了个体的一致性和当地环境因素对迁移时间和距离的影响.
主要成果:
- 对于个别鸟类来说,迁徙距离在过去的几年中是一致的;迁徙时间有很大的差异.
- 植被的绿色 (食物的可用性) 与在繁殖区度过的长时间有积极的相关性.
- 微气候避难所的可用性对繁殖季节的长度产生了积极的影响,特别是在较低的温度下.
结论:
- 粮食供应和微气候避难所可能导致后来的迁徙出发.
- 保护战略应侧重于增强微气候避难所和粮食资源.
- 这些措施可能会延长临灭绝的草原鸟类的繁殖季节,比如小.
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