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评估Platanthera dilatata (兰花科) 在一个海拔梯度上的花特征变化
Mortiz Plendl1, Genevieve E van der Voort1,2, Jasmine K Janes1,2,3
1Biology Department, Vancouver Island University, 900 Fifth St, Nanaimo, BC V9R 5S5 Canada.
概括
普拉坦特拉 (Platanthera dilatata) 的花特征因海拔不同而有所变化,较大的花在较低的海拔上发现. 温度,而不是高度本身,似乎是这种花特征变化的主要驱动因素.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物学 植物学
背景情况:
- 跨海拔梯度的花特征变化记录得很好,但模式可能不一致.
- 影响花特征变化的因素包括授粉者介导的选择,遗传学,可塑性,资源可用性和花敌人.
研究的目的:
- 为了研究10种花特征的变化,在 *Platanthera dilatata* var. 沿着一个海拔梯度的*dilatata*.
- 为了确定这种物种的花特征和海拔高度之间的关系.
主要方法:
- 在Platanthera dilatata中评估了10种鲜明的花特征. 这就是"dilatata"的意思.
- 在加拿大不列颠哥伦比亚省温哥华岛的海拔梯度上采样.
主要成果:
- 观察到,在研究的最低海拔地点,花的特征更大.
- 温度成为花特征变化的重要驱动因素,比高度本身更重要.
- 这表明温度介导的资源可用性影响了花的大小.
结论:
- 受温度影响的资源可用性,对花特征大小施加了局部选择压力.
- 共同授粉者的敌对压力可能会在更大的空间尺度上平衡这些影响.
- 建议对推动花特征变化的环境和遗传因素进行进一步的研究.
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