当邻里重要时:在本地和非本地加利福尼亚草中对苗木特征的上下文选择
Joseph Waterton1, Susan J Mazer2, Elsa E Cleland1
1Ecology, Behavior and Evolution Section, University of California San Diego, La Jolla, CA, United States.
概括
植物邻居的身份影响着幼苗的特征,影响着进化. 邻居的特点,如光线和土壤水分,对种子质量和草的出现时间产生影响.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物科学 植物科学
背景情况:
- 植物与邻居的相互作用是广泛的,但邻居身份的进化后果是鲜为人知的.
- 种子特征受到基于邻居身份的选择,因为竞争结果.
研究的目的:
- 在两个加利福尼亚草 (Stipa pulchra 和 Bromus diandrus) 中评估种子质量和出现时间的选择.
- 研究邻居身份和社区特征如何影响表型选择对幼苗特征的影响.
主要方法:
- 用本地和非本地邻近草在单一和混合物种治疗中的实地实验.
- 量化邻居处理特征 (拦截光线,土壤水分,生产力).
- 在焦点物种中评估种子质量和出现时间的选择.
主要成果:
- 选择有利于两个焦点物种中的更大的种子,在很大程度上独立于邻居身份.
- 选择有利于两种物种的早期出现,但邻居身份对S. pulchra.进行了调节.
- 邻居的特征,如光线,土壤水分和生产力与更强的选择相关,以便更早地出现和更大的种子.
结论:
- 植物社区组成的变化可以改变苗木特征的选择模式.
- 这些效应与邻近社区的可测量特征有关,突出显示了生物相互作用在植物进化中的作用.
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