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<p>Trees play a crucial role in urban environments, offering various ecosystem services that contribute to public health and human well-being. China has initiated a range of urban greening policies to increase the number of urban trees, but monitoring urban tree dynamics at a national scale has proven challenging. Here, we used high-resolution nanosatellite images to quantify urban tree cover in all major Chinese cities in 2019 and study changes in tree cover between 2010 and 2019. We show that 11.47% of urban areas were covered by trees in 2019, and 76% of the cities experienced an increase in tree cover compared with 2010. Notably, the increase in tree cover in the mega-cities of Shanghai, Beijing, Shenzhen and Guangzhou (6.64%) was higher than that in other cities analyzed. Tree cover increases also vary between urban land use types, with public service (3.09%) and residential areas (1.79%) having the highest values. The study employed a data-driven approach toward assessing urban tree cover changes, showing clear signs of overall increases that nonetheless do not benefit all cities equally.</p>

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A strong but uneven increase in urban tree cover in China over the recent decade

  • 期刊论文

  • 发表日期：

    2025年4月22日

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  • Xiaoxin Zhang,
  • Martin Brandt,
  • Xiaoye Tong,
  • Xiaowei Tong,
  • Wenmin Zhang,
  • Florian Reiner,
  • Sizhuo Li,
  • Feng Tian,
  • Yuemin Yue,
  • Weiqi Zhou,
  • Bin Chen,
  • Xiangming Xiao,
  • Rasmus Fensholt

摘要

Trees play a crucial role in urban environments, offering various ecosystem services that contribute to public health and human well-being. China has initiated a range of urban greening policies to increase the number of urban trees, but monitoring urban tree dynamics at a national scale has proven challenging. Here, we used high-resolution nanosatellite images to quantify urban tree cover in all major Chinese cities in 2019 and study changes in tree cover between 2010 and 2019. We show that 11.47% of urban areas were covered by trees in 2019, and 76% of the cities experienced an increase in tree cover compared with 2010. Notably, the increase in tree cover in the mega-cities of Shanghai, Beijing, Shenzhen and Guangzhou (6.64%) was higher than that in other cities analyzed. Tree cover increases also vary between urban land use types, with public service (3.09%) and residential areas (1.79%) having the highest values. The study employed a data-driven approach toward assessing urban tree cover changes, showing clear signs of overall increases that nonetheless do not benefit all cities equally.