在血管植物中的叶子和度的环境与植物遗传控制
Di Tian1,2,3, Zhengbing Yan4, Bernhard Schmid5,6
1State Key Laboratory of Efficient Production of Forest Resources, Beijing Forestry University, Beijing, 100083, China. tiandi@bjfu.edu.cn.
Nature communications
|June 24, 2024
概括
环境因素显著影响植物叶子中 (N) 和 (P) 度及其比率 (N:P). 物种中的这种可塑性挑战了固定生物地球化学的想法,这些是塑造全球植物营养模式的.
科学领域:
- 生态生态学 生态生态学
- 植物生理学 植物生理学
- 生物地质化学生物地质化学
背景情况:
- 论证了叶子 (N) 和 (P) 固态度的全球模式,解释范围从表型可塑性到物种的生物地球化学.
- 了解这些模式对于预测生态系统对环境变化的反应至关重要.
研究的目的:
- 调查物种身份和环境变量对叶子N和P度和N:P比率变化的相对贡献.
- 评估物种内可塑性对环境梯度的反应中的作用.
主要方法:
- 编制了一个全球数据集,包括36,413个对联的叶子N和P的观测,分类学,以及来自7,549个地点和3,700个物种的45个环境共变量.
- 利用随机森林模型来识别物种内部变化的环境驱动因素.
- 将随机森林结果与广泛使用的线性混合效应模型进行比较.
主要成果:
- 种内变化约占叶子N,P和N:P比率总变化的一半.
- 环境变量解释了29%的叶子N变化,31%的叶子P变化和22%的N:P变化.
- 随机森林模型有效地识别了对物种内部变异的环境影响,而线性混合效应模型往往忽略了这些影响.
结论:
- 环境对物种内的叶子N,P和N:P的塑性反应有很大影响.
- 这些发现挑战了固定的生物地化学的概念,以及物种分布在全球叶子营养模式中的支配地位.
- 环境的可塑性在塑造全球植物固体几何学方面发挥着关键作用.
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