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干旱应对的种群变化在各个生命阶段都是一致的,但在原生和非原生范围之间没有变化

Dávid U Nagy¹, Arpad E Thoma¹, Mohammad Al-Gharaibeh²

¹Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, 06108, Germany.

The New phytologist

|June 11, 2024

概括

广泛分布的物种对干旱的适应在本地和非本地范围之间有所不同. 非本地Conyza canadensis表现出较弱的干旱适应性,这表明正在进行的进化和未来扩张的潜力.

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:

了解物种适应环境变化的理解对生态学至关重要.
在常见的花园实验中,人群间变异 (APV) 可以揭示适应性反应.
很少有研究在多个生命阶段比较本地和非本地人群的APV.

研究的目的:

在干旱条件下检查Conyza canadensis中的APV性能和功能特征.
为了比较本地 (北美) 和非本地 (欧亚洲) 人口之间的干旱反应.
调查在招募,青少年和成年生活阶段的范围特定适应.

主要方法:

在北美和欧亚大陆的干旱度梯度上研究了59个Conyza canadensis种群.
在生命的三个阶段应用干旱 (干燥或湿) 处理:招募,青少年和成人.
在干旱处理后评估植物的性能和功能特征.

主要成果:

在本地和非本地范围之间观察到干旱反应中APV的对比模式.
在本地范围内,来自xeric息地的种群在干旱下表现下降较少.
息地干旱度与干旱耐受性之间的这种关系在非本土人群中并不明显.

结论:

与本地人群相比,非本地Conyza canadensis对干旱的局部适应能力较弱.
在没有完全适应非生物因素的情况下,可能会出现大量的入侵物种.
研究结果表明,已建立的入侵性种群正在不断演变,并有可能在未来扩大范围.

关键词:

科尼扎卡纳德尼斯 (Conyza canadensis) 是一个植物.气候变化气候变化气候变化干旱反应干旱反应种内特定变化的变化.侵入性侵袭性侵袭性自然选择自然选择人类的本体生长过程 (ontogeny)塑性的可塑性塑性

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