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迁徙鸟的繁殖分布在过去一个世纪中随着非繁殖季的降雨而波动

Henry C Stevens¹, Christine A M France², Peter P Marra^1,3

¹Department of Biology, Georgetown University, Washington, DC, USA.

Global change biology

|October 16, 2025

概括

气候变化影响了像美国红 (Setophaga ruticilla) 这样的候鸟. 非繁殖场的干旱将繁殖起源转移到南方,影响生存,特别是长途移民.

科学领域:

生态学和进化生物学
气候变化生物学气候变化生物学
鸟类学鸟类学是一门学科.

背景情况:

气候变化推动了物种分布的转变,给候鸟带来了挑战.
美国红 (Setophaga ruticilla) 对气候变化表现出复杂的反应.
之前的研究表明,与牙买加干旱有关的繁殖起源向南转移.

研究的目的:

为了研究气候驱动的繁殖起源变化的历史范围和地理变化,在美国红色开始.
确定非繁殖季雨量模式与过去一个世纪繁殖起源的变化之间的关系.
了解气候变化在塑造迁徙鸟类在其年度周期中的分布中的作用.

主要方法:

从博物馆标本和活着的美国红 (Setophaga ruticilla) 中分析尾羽稳定同位素,涵盖自20世纪初以来的三个时间段.
在五个不同的非繁殖地区采样:安第斯山脉,大安蒂尔群岛,伊斯密岛,太平洋斜坡和尤卡坦.
应用ANCOVA来将非繁殖降雨趋势与平均繁殖起源的变化相关联.

主要成果:

在经历干燥趋势的非繁殖场的美国红种群显示了平均繁殖起源的相应向南转移.
非繁殖降雨和繁殖起源转移之间的相关性在现代时期是最强的,与普遍降雨减少相吻合.
观察到的变化在物种的非繁殖范围内的地理位置上有所不同.

结论:

气候变化,特别是改变了非繁殖场的降雨模式,显著影响了美国红的繁殖起源.
这些变化表明了复杂的时空气候影响,影响着候鸟种群在其全年周期的迁徙.
了解这些机制对于预测未来的范围动态和迁徙物种的保护需求至关重要.

关键词:

繁殖范围的繁殖范围.全年周期的全年周期.全球气候变化全球气候变化迁移的连接性迁移的连接性降雨量降雨量降雨量降雨量季节性相互作用的季节性相互作用稳定的同位素是稳定的.

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