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使用变暖容忍度来预测低木植物对气候变化的反应

Liping Wei^1,2, Pieter Sanczuk², Karen De Pauw²

¹CAS Engineering Laboratory for Vegetation Ecosystem Restoration on Islands and Coastal Zones, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.

Global change biology

|January 26, 2024

概括

变暖容忍度 (ΔT_niche) 预测了气候变化下的植物表现. 较高的气候变暖耐受性与12种欧洲森林底层树种在不同的微气候中生存和繁殖的增加相关.

科学领域:

生态生态学生态生态学
气候变化生物学气候变化生物学
植物科学植物科学

背景情况:

气候变化对物种构成威胁,因为它们超出了关键的热极限.
评估物种应对气温上升的能力对于预测生态影响至关重要.
变暖耐受性 (ΔT_niche) 是一个关键指标,表明一种物种可以承受多大的额外变暖.

研究的目的:

评估12种地下植物物种在欧洲度梯度上对变暖的耐受性.
调查宏观气候和微观气候因素对物种变暖耐受性的影响.
为了确定温暖耐受性和植物表现 (生存,生长,繁殖) 之间的关系.

主要方法:

在五个欧洲地区进行了跨大陆移植实验.
对12种地下植物物种计算了变暖耐受性 (ΔT_niche).
植物性能指标 (生存,高度,地面覆盖,开花) 被监测了三年.

主要成果:

变暖耐受性在物种之间和欧洲各地区之间有很大差异,差异高达8°C.
与较密集的森林内部相比,在森林边缘和开放的树林中观察到较低的变暖容忍度.
植物的性能,包括生长和繁殖,随着更高的变暖耐受性而增加.

结论:

种类的变暖耐受性受到广泛的气候和当地森林微气候的影响.
这些发现支持了这样一个假设:随着局部温度接近或超过物种的热极限,植物的性能下降.
变暖耐受性是预测物种在未来变暖情景下的脆弱性和表现的有价值指数.

关键词:

气候变化气候变化气候变化一个跨大陆的移植实验.森林生态系统的森林生态系统微观气候微观气候是一种微观气候.品种特征品种特征品种特征热的热是一个热.底层树木的物种类型.变暖耐受性变暖耐受性

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