气候调解了与两生物多功能主义中的表型可塑性相关的权衡
Mark A Kirk1,2, Alycia C R Lackey3, Kelsey E Reider4
1Department of Biological Sciences, Watershed Studies Institute, Murray State University, Murray, Kentucky, USA.
The Journal of animal ecology
|September 28, 2024
概括
气候和密度影响着不同的形态的发展. 环境因素,如生长季节的长度和寒冷时期,决定了是否成为陆地或水生动物,影响了它们的生存.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 气候变化生物学 气候变化生物学
背景情况:
- 多种类型,其中一个基因型产生不同的表型,对于适应至关重要.
- 两动物等动物的表型可塑性对于预测气候变化影响至关重要.
- 了解维持多性质的选择性压力需要控制可塑性驱动因素.
研究的目的:
- 为了研究气候变化和密度依赖如何在亚利桑那州的虎中保持多性.
- 解开气候和密度对形态发展的直接和间接影响.
- 为预测气候变化对表型可塑性的影响提供一个框架.
主要方法:
- 利用了32年的亚利桑那州虎幼虫和成人的数据集 (Ambystoma mavortium nebulosum).
- 采用零碎结构方程模型 (SEM) 来分析气候和密度对形态结果的影响.
- 评估了影响表型可塑性的直接和间接途径.
主要成果:
- 较长的生长季节直接有利于变形 (陆地) 的结果.
- 气候通过密度依赖间接影响了形态:寒冷时期增加了食人行为 (有利于paedomorphs),低积雪增加了幼虫密度 (有利于paedomorphs).
- 气候和密度依赖都起到增长和资源限制的代理作用.
结论:
- 气候和密度依赖的因素是沙兰多的关键驱动因素.
- 这些因素相互作用,影响了变形和变形发育之间的平衡.
- 研究结果强调需要研究气候变化将如何改变对表型可塑性的选择性压力.
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