TITLE:Urbanexpansionandrenewalimpactonecosystemserviceandthecorrespondpopulationinfluence:AcasestudyofShenzhen,China
Abstract:Urban spatial development exhibits diverse characteristics worldwide. Despite extensive research on the ecological and environmental effects of urban spatial development, most studies have focused on the ecological and environmental effects of urban expansion without adequately considering the ecological and environmental effects and the population performance of both urban expansion and renewal. To address this gap, we conduct a case study on Shenzhen using an ecosystem service spatial assessment model and relevant algorithms to assess the ecological and environmental effects of urban spatial development. We further summarise the comprehensive benefits and patterns of urban spatial development at the street level as well as the corresponding population size and density. Results show the following:(1) Between 2015 and 2020, urban expansion and renewal accounted for approximately 60.21% and 18.57% of urban spatial development in Shenzhen, respectively, while there was also a small percentage of internal transformation of blue-green infrastructure. (2) During the study period, the urban heat island effect showed a slight upward trend in Shenzhen, whereas stormwater regulation and recreational services showed downward trends, mainly due to the significant increase in impervious surface. However, the increase in green space in some areas largely mitigated the associated negative impact. (3) There are seven types of ecosystem services change patterns. Among them, the basic stable type of street has the highest population density, streets with increased urban heat island effect have the largest population size, and streets with decreased urban heat island effect have relatively high population density. (4) The ecological effect curves of the spatial evolution types show that urban renewal type 1 has an overall positive impact on ecosystem services. Urban sprawl negatively impacts the three types of ecosystem services examined in this study, whereas the impacts of the other two types are not significant.
Keywords:Urbanspatial evolution;Ecosystem service; integrated responses; Population performance; Urban expansion and renewal
