J* E* C* N* U* N* S* ›› 2025, Vol. 2025 ›› Issue (6): 82-93.doi: 10.3969/j.issn.1000-5641.2025.06.010

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Tree temperature shift and regulation of various landscape tree species under high-temperature stress: A case study in Shanghai Chenshan Botanical Garden

Ming LIU1,2(), Zhiyuan WANG1, Kankan SHANG2,3,*()   

  1. 1. College of Architecture, Nanjing Tech University, Nanjing 211816, China
    2. Key Laboratory of Ecology and Energy Saving Study of Dense Habitat (Ministry of Education), Tongji University, Shanghai 200092, China
    3. Shanghai Chenshan Botanical Garden, Shanghai 201602, China
  • Received:2024-10-20 Accepted:2025-02-02 Online:2025-11-25 Published:2025-11-29
  • Contact: Kankan SHANG E-mail:mingliu@njtech.edu.cn;shangkankan@163.com

Abstract:

We have investigated the correlations between tree temperature and leaf physiological variables (net photosynthetic rate, respiration rate, and stomatal conductance) and functional traits (leaf area, leaf thickness, specific leaf weight and specific leaf area) by measuring tree temperatures using infrared thermal imager in Shanghai Chenshan Botanical Garden taking 37 tree species as sample. In general, the average temperature difference between the crown and the air is 0.6℃, while the average temperature difference between the trunk and the air is 2.1℃. Under high temperature stress, the temperature regulation mechanisms of different landscape tree species have significant differences. According to the regulation shifts of the tree temperature in response to high-temperature stress, tree species can be divided into 3 types, i.e., rising type, maintenance type, and descending type. Tree species with larger single-leaf areas, specific leaf areas, and thinner leaf thickness have relatively lower crown temperatures and higher physiological levels of leaves, resulting in relatively better cooling effects. This can be used as a reference for selecting suitable tree species for regulating microclimate.

Key words: landscape tree species, high temperature stress, tree temperature, crown temperature, microclimate regulation

CLC Number: