热应激揭示了由于后交配性选择导致的生育债务
Julian Baur1, Martyna Zwoinska1,2, Mareike Koppik1,3
1Department of Ecology and Genetics, Division of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden.
Evolution letters
|February 19, 2024
概括
性选择可能会阻碍适应气候变化. 性选择所青的特征可以在热应激下降低生育能力,在热浪期间冒着多类物种种群的风险.
科学领域:
- 进化生物学是进化的生物学.
- 适应气候变化 适应气候变化
- 性选择性选择性选择
背景情况:
- 快速的气候变化需要自然种群的快速适应.
- 性选择在帮助适应中的作用因性选择性特征的潜在成本而受到争论.
- 在更恶劣的气候条件下增加的自然选择可能会揭示这些成本的人口影响.
研究的目的:
- 在日益严峻的环境条件下,调查性选择成本对人口的影响.
- 预测强烈的后交性选择的进化历史如何影响在热应激下男性生育能力.
- 为了测试这些预测,在不同的交配制度下使用种子甲虫.
主要方法:
- 应用生命史理论来建模生殖和男性生殖系维护之间的权衡.
- 在不同交配制度下演变的种子甲虫系中评估了生育的热敏度 (TSF).
- 操纵的交配制度改变了68代人的性和自然选择机会.
主要成果:
- 在强烈的性选择下演变的雄性表现出提高了生育的热敏感性 (TSF).
- 来自强烈性选择制度的雌性也显示了TSF的增加,这表明通过与男性特征的遗传相关性进化.
- 父亲的热应激降低了后代的生育能力,没有观察到适应性跨代塑性.
结论:
- 生育能力和后交配性选择特征之间的权衡在恶劣的环境中暴露.
- 由于这些权衡,多的物种面临极端热浪的直接风险.
- 性选择可能会通过增加对热应激的脆弱性来阻碍适应气候变化.
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