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在化石个体中检测环境依赖的发育可塑性
Anieke Brombacher1,2,3, Alex Searle-Barnes1, James M Mulqueeney1,4
1School of Ocean and Earth Science, University of Southampton, Southampton SO14 3ZH, United Kingdom.
概括
化石记录揭示了环境变化如何影响物种发展. 这项研究表明,温度影响浮游生物菌的生长速度,证明了深度时间的发育可塑性.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 地质化学 地质化学
背景情况:
- 化石记录提供了对生物多样性变化的洞察力,但在个人环境影响的时间解决方面存在困难.
- 要了解表型可塑性在宏观进化中的作用,需要检查跨地质时间尺度的个体反应.
研究的目的:
- 通过使用化石来研究浮游生物的发育轨迹对环境的依赖性.
- 评估深度时间检测发育可塑性的可行性.
主要方法:
- 结合计算断层扫描 (CT) 和激光除诱导结合血质谱法 (LA-ICP-MS) 用于分析.
- 测量了Mg/Ca比率以重建古气温,并分析了增长率的一般化添加混合效应 (GAMM) 模型.
主要成果:
- 在三种 *Menardella* 种类中,体内生长速度有所不同,与化温度相反相关.
- 增长速度的热敏度在物种之间有显著差异,M. limbata*和M. pertenuis*的热敏度是M. exilis*的两倍.
- 没有检测到建筑形状特征的环境信号,这表明可塑性比形状更影响生长.
结论:
- 在化石记录中检测发育性可塑性是可行的,使用综合分析技术.
- 环境因素,特别是温度,会影响浮游生物虫在进化过程中的发展轨迹.
- 这种方法可以增强我们对特征变异如何推动生命多样化的理解.
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