部分移民的生殖效益的时间和空间变化
Stephanie Witczak1,2, Urs G Kormann1,3, Benedetta Catitti1
1Ecological Research Unit, Swiss Ornithological Institute, Sempach, Switzerland.
Ecology
|October 26, 2024
概括
在部分移民系统中,居民往往表现优于移民. 然而,繁殖区的空间变化,如高度,可以改变红风 (Milvus milvus) 战略的繁殖成功.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 鸟类学 鸟类学是一门学科.
背景情况:
- 部分迁移系统涉及单一人口中的居民和迁移个体.
- 居民通常预计由于早期的繁殖和更好的领土而具有生殖优势.
- 环境条件的年度和空间变化可能会影响居民和移民的相对繁殖成功.
研究的目的:
- 调查居民和迁徙红 (Milvus milvus) 之间的繁殖产量的时间和空间变化.
- 探索海拔梯度对两种策略生殖成功的影响.
- 了解环境变化如何影响迁徙和居民个体的共存.
主要方法:
- 利用了瑞士红风的4年生殖数据.
- 收集了来自繁殖个体的183个GPS衍生全年周期数据.
- 分析了与高度和时间因素相关的生殖产出.
主要成果:
- 居民在低海拔地区产生的幼比移民更多,但在高海拔地区则不多.
- 发现了居民与移民生殖优势每年变化的证据.
- 居民和移民之间的繁殖开始没有显著差异,尽管后来的繁殖减少了生殖产出.
结论:
- 在部分移民群体中,居民和移民之间的生殖产出差异受到明显的过冬场所和空间繁殖变量 (如海拔) 的影响.
- 生殖效益的空间和时间变化对于预测迁徙物种对环境变化的反应至关重要.
- 高度梯度对居民和迁徙红的相对繁殖成功有重大影响.
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