热适应不能给入侵物种比本地物种提供碳预算优势
Thibaut Juillard1,2, Christoph Bachofen1,2, Maxwell Bergström1,2
1Plant Ecology Research Laboratory PERL, School of Architecture, Civil and Environmental Engineering ENAC, EPFL, Lausanne CH-1015, Switzerland.
Plant physiology
|November 10, 2025
概括
侵入性植物可能并不总是比本地物种适应更高的温度. 这项研究发现,侵入性风车棕树显示出有限的光合作用可塑性,这表明温度可能不会推动其未来的传播.
科学领域:
- 生态生态学 生态生态学
- 植物生理学 植物生理学
- 气候变化生物学 气候变化生物学
背景情况:
- 本地和入侵植物都适应光合作用和呼吸到更温暖的温度.
- 目前尚不清楚入侵物种是否具有比本地物种更大的适应能力,这可能解释了它们的入侵成功.
研究的目的:
- 为了比较一种侵入性棕 (Trachycarpus fortunei) 与两个欧洲本土物种 (Ilex aquifolium,Tilia cordata) 的光合作用和呼吸习惯,以应对温度上升.
- 评估增强的适应是否有助于Trachycarpus fortunei的入侵潜力.
主要方法:
- 在欧洲温度梯度 (8.421.8°C) 上进行了一项为期两年的移植实验.
- 测量光合作用特征 (最佳温度,同化,热宽度) 和呼吸参数 (R25,Q10).
- 在不同的温度调节下模拟整个工厂的碳预算.
主要成果:
- 所有物种都显示光合作用,同化和热宽度的最佳温度随着变暖而增加.
- 当地物种在25°C下降了呼吸 (R25),而入侵物种则显示呼吸的温度敏感性降低了 (Q10).
- 侵入性棕树表现出与本地物种相似或较低的适应能力,碳预算始终较低.
结论:
- 侵入性风车棕并不一定比本地物种具有更大的光合作用可塑性.
- 碳预算的温度驱动增强可能在这种物种未来的入侵动态中发挥有限的作用.
- 并非所有入侵植物都对温度上升具有优越的适应性.
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