The Cooling and Humidifying Effects and the Thresholds of Plant Community Structure Parameters in Urban Aggregated Green Infrastructure

Forests

Jiaxing Wei¹  Yuncai Wang²  Hongbo Li³  Xizi Xu⁴ 

[1] Department of Landscape Architecture, Nanjing Agricultural University, Nanjing 210095, China;Landscape Architecture Department, College of Architecture and Urban Planning, Tongji University, Shanghai 200092, China;School of Horticulture, Nanjing Agricultural University, Nanjing 210095, China;School of horticulture, Chiba University, Chiba 2638522, Japan;

关键词: aggregated green infrastructure;    dummy variable regression;    heat island effect;    canopy density;    porosity;    vegetation types;   

DOI  :  10.3390/f12020111

来源: DOAJ

【 摘 要 】

The cooling and humidifying effects of urban aggregated green infrastructure can provide essential services for city ecosystems, regulating microclimates or mitigating the urban heat island effect. However, the optimal thresholds of plant community structure parameters for maximizing the associated cooling and humidifying effects remain unclear. In this paper, we use the method of dummy variable regression to measure plant communities in an urban aggregated green infrastructure. By examining the relationships between the cooling and humidifying effects and plant community structure parameters (i.e., canopy density, porosity, and vegetation type), we introduce optimal thresholds for the parameters. We find that canopy density has a significantly positive correlation with both cooling and humidifying effects, while porosity has a positive correlation with cooling and a negative one with humidifying. Different vegetation types have distinct influences on cooling and humidifying effects. When the canopy density is between 0.81 and 0.85 and the porosity is between 0.31 and 0.35, the cooling and humidifying effects of the plant communities reach their peak. Additionally, the greening coverage rate and spatial types of urban aggregated green infrastructure have influences on cooling and humidifying effects. The findings can help us to better understand the relationships between plant community structure parameters and their temperature regulation functioning for urban aggregated green infrastructure. This study provides guidelines and theoretical references for the plant configuration of future urban green spaces.

【 授权许可】

Unknown