影响Swainson's Thrush (Catharus ustulatus) 沿着一个海拔梯度的筑巢成功的因素
Sarah C Deckel1, William V DeLuca1,2, Alexander R Gerson3
1Department of Environmental Conservation University of Massachusetts Amherst Massachusetts USA.
Ecology and evolution
|January 18, 2024
概括
山地鸟在繁殖季节繁殖的成功率下降,并且受到大雨的负面影响. 气候变化可能通过改变温度和降雨模式,进一步威胁到山地鸟类的生存.
科学领域:
- 生态生态学 生态生态学
- 鸟类学 鸟类学是一门学科.
- 气候变化生物学 气候变化生物学
背景情况:
- 山地鸟的繁殖成功受到巢穴掠食和恶劣气候的威胁.
- 气候变化正在改变山地生态系统,可能加剧这些威胁.
- 鸟类可能面临来自高海拔地区不利气候和低海拔地区增加掠食的相互矛盾的压力.
研究的目的:
- 为了研究生物和非生物因素对Swainson's Thrush (Catharus ustulatus) 沿着海拔梯度的每日存率 (DSR) 的影响.
- 了解气候变化如何影响山地鸟类种群.
主要方法:
- 从2016年到2021年,在白山国家森林监测了斯温森的巢穴.
- 统计模型 (AICc) 用于分析每日存率 (DSR) 的变化.
- 研究了时间,降雨强度,海拔和最低每日温度对DSR的影响.
主要成果:
- 随着繁殖季节的进展,每日存率 (DSR) 显著下降.
- 较高的降雨强度 (mm/h) 对DSR产生了负面影响.
- 高度和最低每日温度之间的相互作用影响了DSR:生存率随着低海拔地区的温度增加而增加,但在高海拔地区下降.
结论:
- 由于气候变化,山地鸟类的化生存容易受到降雨事件的频率和强度的增加.
- 气候和掠食的相反压力给山地鸟群带来了复杂的挑战.
- 由于这些不断变化的环境条件,其他山地流物种也可能面临风险.
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