尺寸和温度对发育时间的影响
James F Gillooly1, Eric L Charnov, Geoffrey B West
1Department of Biology, The University of New Mexico, Albuquerque, New Mexico 87131, USA. gillooly@unm.edu
Nature
|May 3, 2002
概括
一个新的模型根据身体大小和温度预测了生物体的发育时间,适用于从胚胎到动物浮游生物的各种物种. 这项工作提供了一个统一的生物时间概念,对于理解生命过程至关重要.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 生理学 生理学 生理学
背景情况:
- 身体尺寸和体温是影响生物速率和发育时间的基本因素.
- 了解这些因素在本体发生 (生物发育) 过程中如何相互作用至关重要,因为尺寸和温度都经常发生变化.
- 现有的模型可能无法完全捕捉不同种类的尺寸,温度和发育之间的复杂相互作用.
研究的目的:
- 推导出一个预测本体遗传发育时间的一般生物物理模型.
- 建立身体质量,温度和发育时间之间的关系.
- 测试模型在各种动物群体和生命阶段的适用性.
主要方法:
- 从全方位测量 (缩放) 和生化动力学原理推导出一个一般模型.
- 测试模型与鸟类和水生生物胚胎发育的经验数据对比.
- 通过对动物浮游生物和其他动物群体的胚胎后发育数据验证模型.
主要成果:
- 该模型准确地预测了胚胎发育时间,跨越了广泛的卵子大小和化温度.
- 它解释了很大一部分 (约. 75%) 的胚胎后动物浮游生物发育的变化.
- 固体测量 (碳与的比) 部分解释了动物浮游生物发育的剩余变化.
结论:
- 一个一般的,第一原则模型有效地预测了发育时间作为身体质量和温度的函数.
- 该模型表明,它在各种生物和生命阶段具有广泛的适用性,这表明了普遍的生物时间.
- 这项研究为理解生物时间提供了一个统一的框架,对生态学和进化生物学有影响.
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