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在一个广泛和不断扩大的入侵植物的范围边缘的适应性约束

Rebecca A Fletcher¹, Daniel Z Atwater², David C Haak¹

¹School of Plant and Environmental Sciences, Virginia Tech, 1015 Life Science Circle, Blacksburg, VA 24061, USA.

|November 29, 2023

概括

草 (Sorghum halepense) 在没有当地适应的情况下迅速扩展到北美. 尽管有竞争影响,但在范围边缘的健身权衡可能会限制进一步的扩散.

科学领域:

生态生态学生态生态学
侵入性物种生物学生物学
植物适应植物适应

背景情况:

了解入侵物种范围动态对于管理和预测生态影响至关重要.
范围边缘是研究适应和扩张局限性的关键区域.
草 (Sorghum halepense) 是一种具有重大生态和经济影响的全球入侵植物.

研究的目的:

为了研究气候,竞争和适应在约翰桑格拉斯种群扩张中的相互作用.
确定促进和限制入侵物种传播的因素,特别是在范围边缘.
评估当地适应在各种环境中入侵植物成功中的作用.

主要方法:

在北美核心,中间和范围边缘群体中进行了互惠的共同花园实验.
实验跨越北/南和东/西梯度,以捕捉不同的气候和生物条件.
操纵了植物竞争,以评估其对草表现和种群动态的影响.

主要成果:

约翰桑格拉斯的范围扩张在很大程度上没有在北美分布上发生显著的本地适应.
在范围边缘确定了一个健身权衡,可能限制进一步的人口增长和扩张.
植物竞争显著减少了草的生长,但没有改变不同种群在花园中的相对表现,尽管这取决于气候.

结论:

研究入侵物种范围动态需要明确考虑范围边缘种群.
全球变化可能会改变影响入侵物种传播和适应因素的平衡.
在范围边缘观察到的健身权衡表明,尽管约翰桑格拉斯的广泛成功,但其扩张的潜在限制.

关键词:

生物相互作用生物相互作用 Sorghum halepense 这种类型的葡萄是有价值的.健身权衡权衡 - 健身权衡权衡开花时间开花时间侵入性物种是一种入侵性物种.范围的边缘范围的边缘.范围的限制范围的限制范围的限制.

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