Pretzsch Hans, Biber Peter, Uhl Enno, Dahlhausen Jens, Schütze Gerhard, Perkins Diana, Rötzer Thomas, Caldentey Juan, Koike Takayoshi, Con Tran van, Chavanne Aurélia, Toit Ben du, Foster Keith, Lefer Barry
Chair for Forest Growth and Yield Science, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Hans-Carl-von-Carlowitz-Platz 2, 85354, Freising, Germany.
Departamento de Silvicultura y Conservación de la Naturaleza, Universidad de Chile, Santiago de Chile, Chile.
Sci Rep. 2017 Nov 13;7(1):15403. doi: 10.1038/s41598-017-14831-w.
Despite the importance of urban trees, their growth reaction to climate change and to the urban heat island effect has not yet been investigated with an international scope. While we are well informed about forest growth under recent conditions, it is unclear if this knowledge can be simply transferred to urban environments. Based on tree ring analyses in ten metropolises worldwide, we show that, in general, urban trees have undergone accelerated growth since the 1960s. In addition, urban trees tend to grow more quickly than their counterparts in the rural surroundings. However, our analysis shows that climate change seems to enhance the growth of rural trees more than that of urban trees. The benefits of growing in an urban environment seem to outweigh known negative effects, however, accelerated growth may also mean more rapid ageing and shortened lifetime. Thus, city planners should adapt to the changed dynamics in order to secure the ecosystem services provided by urban trees.
尽管城市树木很重要，但尚未在国际范围内对它们对气候变化和城市热岛效应的生长反应进行研究。虽然我们对近期条件下森林的生长情况了如指掌，但尚不清楚这些知识能否简单地应用于城市环境。基于对全球十个大都市的树木年轮分析，我们发现，总体而言，自20世纪60年代以来城市树木生长加速。此外，城市树木往往比周边农村地区的树木生长得更快。然而，我们的分析表明，气候变化对农村树木生长的促进作用似乎大于对城市树木的促进作用。在城市环境中生长的好处似乎超过了已知的负面影响，然而，生长加速也可能意味着衰老更快和寿命缩短。因此，城市规划者应适应这种变化的动态，以确保城市树木提供的生态系统服务。
