全球侵袭性仙人掌的侵袭性种群中的可塑性增加
Yohannes B Tesfay1, Annika Blaschke1, Nathan Ashley2
1Institute of Botany and Landscape Ecology, University of Greifswald, 17489 Greifswald, Germany.
Plants (Basel, Switzerland)
|September 28, 2023
概括
侵袭性Opuntia ficus-indica比本土种群具有更大的水应激可塑性,增强了其侵袭性成功. 这种适应能力,特别是在潮湿的条件下,表明气候变化增加了入侵潜力.
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
- 植物生理学 植物生理学
背景情况:
- 生物入侵威胁着全球生物多样性和生态系统功能.
- 现型可塑性是使入侵物种适应的一个关键特征.
- 花 (Opuntia ficus-indica) 是干旱和半干旱地区普遍存在的入侵物种.
研究的目的:
- 在本地和入侵的Opuntia ficus-indica种群中研究表型塑性对水压的作用.
- 确定增强的可塑性是否有助于Opuntia ficus-indica.的入侵成功.
主要方法:
- 进行了受控温室实验.
- 评估了三个本地和九个入侵的Opuntia ficus-indica种群.
- 植物接受了对比的可用水处理 (干燥和湿).
主要成果:
- 所有种群都在干燥处理中幸存下来,但侵入性种群的可塑性明显更高.
- 侵袭性种群的地面生物质增加了94%,水供应量很高,相比之下,原生种群的生物质增加了36%.
- 侵袭性种群的地下生物量从干燥到潮湿的条件增加了75%,而土著种群没有显著的反应.
结论:
- 在入侵性Opuntia ficus-indica种群中增强的表型可塑性是它们生态成功的重要驱动因素.
- 该物种适应不同水资源的适应能力,特别是增加供应,有利于在不太干旱的条件下入侵.
- 气候变化导致干旱地区扩大和荒漠化,预计将进一步增加Opuntia ficus-indica的入侵潜力.
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