在热进化过程中身体尺寸的下降只在温和的温度下被检测出来
Marta A Antunes1,2, Afonso Grandela1,2, Marta A Santos1,2
1CE3C - Centre for Ecology, Evolution and Environmental Changes & CHANGE - Global Change and Sustainability Institute , Lisboa, Portugal.
Proceedings. Biological sciences
|October 1, 2024
概括
果的身体尺寸随着变暖而缩小,但仅在某些种群和环境中. 这种由遗传学和温度影响的复杂反应使得对动物进化的气候变化预测变得更加复杂.
科学领域:
- 进化生物学 进化生物学
- 气候变化生物学 气候变化生物学
- 生理生态生态学 生理生态学
背景情况:
- 身体尺寸是影响生物体生理学,新陈代谢和生殖成功的关键特征.
- 以前的研究表明,随着温度的上升,身体尺寸的减少趋势,但证据仍然不一致.
- 了解气候变暖下的身体尺寸演变对于预测物种反应至关重要.
研究的目的:
- 在变暖的环境下,研究体型在实验进化的Drosophila subobscura种群中的进化.
- 评估地理来源和环境条件对身体尺寸变化的影响.
- 探索基因型和环境之间的复杂相互作用在塑造身体大小进化的过程中.
主要方法:
- 使用了来自两个不同的地理来源的经过实验进化的Drosophila subobscura种群.
- 种群在祖先 (控制) 和变暖环境中进行了测试.
- 身体尺寸被测量为一个关键的形态特征,以评估进化反应.
主要成果:
- 在温暖选择的人群中观察到身体尺寸的减少,但这种效应特定于低度的人群.
- 只有当这些种群在祖先 (对照) 环境中进行测试时,身体尺寸的减少才明显.
- 在变暖的环境中没有发现显著的体型反应,这可能是由于热力学稳定性和繁殖输出选择之间的平衡.
结论:
- 气候变暖下的身体大小演变是复杂的,涉及显著的基因型-环境相互作用.
- 通过这些复杂的相互作用和实验设置的变化,可以解释研究中观察到的不一致性.
- 预测身体尺寸演变需要考虑内部和跨特异性变异以及它们与环境因素的相互作用.
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