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一种基础性的沿海沼泽植物对全球变化的复杂生态进化反应

Megan L Vahsen¹, Helena S Kleiner^1,2, Haley Kodak¹

¹Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA.

The New phytologist

|July 15, 2023

概括

沿海沼泽植物在应对气候变化时表现出进化的可塑性,进化影响生态适应. 了解这些生态进化动态是预测沼泽未来的关键.

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:

预测沿海沼泽的未来需要了解植物对快速环境变化的反应.
环境变化通过表型可塑性和选择性压力推动特征变异的转变,导致快速进化.
特性可塑性本身的演化,这是一个研究较少的领域,对生态系统适应至关重要.

研究的目的:

评估沿海沼泽植物对相互作用的全球变化因素的生态进化反应的大小.
研究进化的可塑性在调解植物适应环境变化的过程中的作用.
在全球变化场景下量化进化因素对特征变异的贡献.

主要方法:

一个多因素实验,从种子库中暴露Schoenoplectus americanus基因型,使其受到多样化的CO2,洪水和竞争的影响.
利用32个基因型从两个不同的盐度地点的百年老种子银行中复活.
通过比较不同年龄组和来源的特征反应,以辨别可塑性和进化效应.

主要成果:

在Schoenoplectus americanus的七个测量特征中的五个中,可塑性已经进化.
进化因素,包括遗传变异,在统计模型中解释了额外的9-31%的特征变异.
有证据表明,进化的可塑性在调解对环境变化的生态反应方面发挥着重要作用.

结论:

进化因素在很大程度上调解了沿海沼泽植物对相互作用的全球变化因素的生态反应.
在上个世纪观察到的可塑性进化表明,进化可以影响生态系统适应的速度.
了解这些生态进化动态对于准确预测沿海沼泽的未来弹性和命运至关重要.

关键词:

美国人的鞋 (Shoenoplectus americanus)气候变化气候变化气候变化生态进化的动态.塑性的演变塑性的演变海平面上升的海平面上升湿地湿地湿地湿地

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