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侵袭性扣子草 (Cotula coronopifolia) (Asteraceae) 是耐的,并且具有通过内生菌传播的高潜力

Raúl Sánchez-García¹, Andy J Green¹, Lina Tomasson²

¹Department of Conservation Biology and Global Change, Estación Biológica de Doñana (EBD), Centro Superior de Investigaciones Científicas (CSIC), Américo Vespucio 26, 41092 Seville, Spain.

Plants (Basel, Switzerland)

|August 29, 2024

概括

迁徙鸟类可以通过它们的消化道,特别是在水中,分散入侵的花种子. 模拟的肠道通道显著促进了扣子的发芽,有助于其传播.

科学领域:

生态生态学生态生态学
植物学植物学
侵入性物种生物学生物学

背景情况:

扣子草 (Cotula coronopifolia) 是一种南非原生在全球湿地中的入侵性植物.
它通过排除土著植物物种来威胁本土植物群.
迁徙水鸟被怀疑是通过内生动物传播种子的载体.

研究的目的:

为了研究在不同地区和息地散布布布丁种子的endozoochory的潜力.
评估模拟肠道通道和不同盐度水平对芽的影响.

主要方法:

来自六个按种群 (西班牙,瑞典,英国) 的种子经历了模拟的肠道通道 (化,酸化或两者兼而有之).
发芽试验是在四个盐度水平 (0,5,10,15 g/L) 下进行的.
分析了盐度,肠道通道和人口起源之间的相互作用.

主要成果:

在15g/L盐度下没有发芽;较高的盐度减少并延迟了发芽.
完全模拟肠道通道 (化+酸化) 显著增加和加速发芽.
肠道通道效应在中等盐度 (5-10 g/L) 时更为明显.

结论:

迁徙鸟类可以有效地通过内生动物群,特别是在盐的湿地环境中分散入侵的子种子.
内生动物是一种关键的,但尚未研究的,干果入侵植物的分散机制.
了解这些扩散机制对于管理虫入侵至关重要.

关键词:

分散综合征的分散综合征干果的种子干果的种子它们是内生动物和内生动物.肠道通过肠道通道.非土著物种的非土著物种.盐度盐度盐度盐度盐度

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