个人生活史:既不是慢,也不是快,只是多样化的
Joanie Van de Walle1, Rémi Fay2, Jean-Michel Gaillard3
1Department of Biology, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
Proceedings. Biological sciences
|July 5, 2023
概括
一个广泛使用的生命历史框架适用于所有物种,但不适用于种群内. 人群中的个人生命史是特有的,不遵循缓慢快速的连续.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 生命史理论的人生史理论
背景情况:
- 慢速连续框架解释了物种之间生命历史的变化.
- 人们假设,但没有证实,这种连续性也适用于群体内的个体变化.
研究的目的:
- 测试缓慢-快速连续是否解释了种群内和物种间的生命史变异.
- 确定鸟类和哺乳动物生命历史变异的主要驱动因素.
主要方法:
- 利用了17种鸟类和哺乳动物物种的长期,基于个人的人口统计数据.
- 估计的关键生命史特征:寿命,第一次繁殖的年龄,繁殖频率和生育能力.
- 应用主要组件分析以确定变化轴.
主要成果:
- 缓慢-快速连续性是物种间变化的主要轴.
- 在任何物种中都没有发现个人生命史变化的缓慢-快速连续的证据.
- 个体生命史的变化在不同种群中似乎具有特异性.
结论:
- 缓慢-快速连续性是跨物种生命史变异的有效框架.
- 它不能解释个体生活史在人群中的差异.
- 随机性和密度依赖性等特异性因素驱动着人口内部的变化.
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