以前的繁殖成功和环境变化影响了亚北极巢的巢地忠诚度
Jordan M Thompson1, Brian D Uher-Koch2, Bryan L Daniels3
1College of Natural Resources University of Wisconsin-Stevens Point Stevens Point Wisconsin USA.
Ecology and evolution
|October 14, 2024
概括
皇帝表现出"赢-停留-输-切换"的策略,在失败的筑巢尝试后进一步移动. 这种巢地点忠实策略似乎是适应性的,增加了在失败后切换地点的的巢生存率.
科学领域:
- 生态学和行为生态学
- 保护鸟类的保护活动
- 野生动物人口动力学
背景情况:
- 鸟类中常见的是巢地忠诚,通常与当地条件的熟悉有关.
- "赢-停留-失去-切换"策略在可变环境中可能具有适应性,但环境变化可能会影响分散.
- 了解分散决策对于面临环境转变的长寿物种至关重要.
研究的目的:
- 为了量化皇帝 (Anser canagicus) 的巢点分散距离.
- 为了确定影响分散的因素:以前的命运,春天的时间和洪水.
- 通过将其与巢生存联系起来,评估巢地忠诚度是否具有适应性.
主要方法:
- 使用的长期 (2000-2017年) 捕获-标记-回收数据.
- 采用等级模型来分析微小规模的位忠实度.
- 检查了与筑巢成功,环境变量和生存概率相关的分散距离.
主要成果:
- 没有成功筑巢的比成功筑巢的散得更远 (207.7米) (125.5米),支持了"赢-停留-输-切换"策略.
- 对于成功的巢穴,大洪水后的分散距离略有增加,但对于失败的巢穴,没有.
- 巢点分散距离与以前尝试失败的个体的每日巢存活概率正相关.
结论:
- 之前的筑巢经验和环境变化显著影响皇帝的散播决策.
- "赢-停留-失去-切换"策略似乎是适应性的,在失败后提高转换地点的生存率.
- 由于北极繁殖地的环境变化日益增加,这一战略的未来适应能力是不确定的.
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