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The variation of air purification benefit provided by street tree assemblages in Shenyang, China
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  • Jing Yao,
  • Wei Chen,
  • Miao Liu,
  • Xiaobo Wang,
  • Xingyuan He
Jing Yao

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Xiaobo Wang
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Xingyuan He
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Street trees assemblage is a widespread natural component in the cities and provides a wide range of ecosystem services to the cities. However, the distribution of street trees assemblage within a city is inequal. In this paper, we took air purification benefit provided by street trees for example to examine how urban form, urban geography and drivers of vegetation management affect the variation of ecosystem services provided by street trees in metropolitan Shenyang, Northeastern China. The i-Tree Street (2018) was utilizing to evaluate air purification benefit provided by street trees. We analyze the results using 2 indices: per kilometer benefit (PKB) and average tree benefit (ATB). The results showed us that (1) both indices didn’t vary along the population gradient. (2) The PKB had a decreasing trend along the urban-suburban gradient. (3) The districts which had the highest PKB and ATB are neither the old ones nor the newest one, but the districts start to develop from around 2002 and 2003. Therefore, we infer that the public policy is a main driver of vegetation management, especially for street trees, because street tree is closely related to road/street development which is closely related to economic development of a region. Besides, there could be a time lag effect for ecosystem services provided by trees.