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应用利基范围的概念来了解英国城市树木死亡率

Eun Hye Kim¹, James D Hitchmough¹, Ross W Cameron¹

¹Department of Landscape Architecture, University of Sheffield, Arts Tower, Sheffield S10 2TN, UK.

The Science of the total environment

|August 24, 2023

概括

城市树木面临着气候变化风险. 这项研究发现,Acer物种容易受到干旱的影响,而Quercus物种,特别是地中海树,表现出更大的弹性,突出了树木选择中适应性策略的必要性.

科学领域:

城市生态学城市生态学
适应气候变化适应气候变化
植物生态生理学植物生态生理学

背景情况:

加快的气候变化增加了城市树木的脆弱性,需要重新评估物种适应性.
气候利基模型被广泛使用,但往往低估了物种在城市环境中的真正耐受性极限.
评估物种的适应能力需要经验数据,而不仅仅是存在/不存在,特别是对于在自然位范围之外的种植物种 (NB).

研究的目的:

分析21年来英国植物园中Acer和Quercus物种的死亡趋势.
评估物种对干旱和热应激的反应,与它们的气候利基范围 (NB) 相比.
评估生态性能和物种特异性适应策略在气候利基模型中的重要性.

主要方法:

分析了2000-2021年三大英国植物园 (KEW,WESB,RBGE) 的Acer和Quercus物种的树木库存数据.
死亡率趋势与生物气候变量相对的利基位置的相关性,特别是最热季度的降水量.
不同物种群之间的死亡率的比较 (Acer与Quercus,地中海与本土树).

主要成果:

当降水量低于NB的下限时,鱼种类的年死亡概率增加 (1.2-1.3%) ,累计死亡率较高与这些极限以下的利基位置有关.
Quercus 种类通常表现出对干旱和热应激的弹性,无论它们的利基位置如何.
地中海树表现出比英国本土树更高的耐受性,累积死亡率较低.

结论:

与Quercus物种相比,Acer物种对干旱和热应激更为敏感.
预测城市树的表现仅仅是基层宽度 (NB) 不足;生态表现和适应能力至关重要.
必须将特定物种的适应策略,如地中海树所见的适应策略,整合到气候利基模型中,以在气候变化下实现有效的城市林业.

关键词:

干旱造成的压力是干旱.热浪热浪热浪热浪利基位置位置利基位置位置树木库存数据树木库存数据城市花园的城市花园.城市树木评估

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