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追逐和逃跑驱动在温带阿尔卑斯山类动物迁徙期间细度运动变化

Christian John^1,2, Tal Avgar^3,4,5, Karl Rittger⁶

¹Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, Davis, CA, USA. cjohn@ucsb.edu.

Scientific reports

|July 2, 2024

概括

气候变化对山区生态系统产生影响. 塞拉内华达大角羊 (Ovis canadensis sierrae) 使用温度和降水线索进行垂直移动,寻找最佳的食和避难所.

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
野生动物保护野生动物保护

背景情况:

气候变化改变了山区生态系统,影响了积雪,温度和降雨模式.
由于气候变化导致的植被现象学变化可能会破坏物种的传统海拔迁移模式.
种类可能会使用微小的垂直运动来应对环境的变化和访问避难所.

研究的目的:

研究塞拉内华达大角羊 (Ovis canadensis sierrae) 在高地迁徙期间细微的垂直运动变化的驱动因素.
了解气候驱动的环境因素如何影响这个危的高山专家的移动决策和目的地选择.
评估大角羊的适应策略,以应对短期的环境变化.

主要方法:

利用了20年的GPS项圈数据集,来自311只塞拉内华达大角羊.
采用综合步骤选择分析来确定影响垂直移动和目的地选择的因素.
与环境变量 (如温度,降水和融雪时间) 相关联的动物移动.

主要成果:

高温始终导致大角羊的上坡运动.
降水被确定为下坡运动的可能驱动因素.
大羊根据每年生物质峰值和雪融后的时间选择了食目的地.

结论:

塞拉内华达大角羊利用垂直运动来追踪受景观现象学影响的食机会.
该物种使用短暂的上坡和下坡运动来减轻短期的环境压力因素.
未来的气候变化,包括变暖和风暴模式的改变,可能会显著影响迁移时间和适应性移动策略.

关键词:

高度迁移是一种高度迁移.大角羊是个大角羊.高度迁移的迁移.危物种危物种危物种绿波假设是绿波假设.迁移的现象学是迁移的现象学.这就是 iSSA.

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