将天气纳入常见夜迁徙的数量和趋势
Stephen R Kolbe1, Gerald J Niemi1, Annie M Bracey1
1Natural Resources Research Institute, University of Minnesota - Duluth, Duluth, MN USA.
概括
可见的迁移计数显示,常见夜 (Chordeiles minor) 的种群趋势稳定或增加,这是一个受保护关注的物种. 建议使用这些方法进行长期监测,以准确估计人口趋势.
科学领域:
- 鸟类学 鸟类学是一门学科.
- 保护生物学 保护生物学
- 生态生态学 生态生态学
背景情况:
- 有效的保护需要准确的种群趋势数据,这对像夜 (Chordeiles minor) 这样的物种来说是个挑战,因为传统调查存在困难.
- 迁徙鸟类计数为监测繁殖季难以追踪的物种提供了潜在的替代或补充方法.
研究的目的:
- 评估使用迁徙常见夜的标准化晚间计数来估计种群趋势的可行性.
- 调查天气变量对每日迁徙数量的影响,并确定与大型迁徙航班相关的因素.
主要方法:
- 在15年的时间里 (2008-2022) 沿上湖西部进行了夜的标准化夜间计数.
- 利用通用的线性混合效应模型来分析每日计数,天气变量和大型迁徙航班之间的关系.
- 使用几何平均通行率调整以每年天气变化为准,计算了人口趋势.
主要成果:
- 较轻的,西风和更高的温度与更高的每日计数和大迁徙航班的可能性增加有关.
- 趋势分析表明,在15年的研究期间,常见夜的种群趋势稳定或不显著增加.
- 趋势模型解释了计数变化的低百分比,强调需要持续监测和天气共变量调整.
结论:
- 可见的迁移计数可以为监测常见夜种群提供有价值的补充数据.
- 建议为北美常见夜监测建立广泛的,标准化的可见迁移计数程序.
- 长期监测工作,包括天气调整,对于有效估计这一保护关注物种的种群趋势至关重要.
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