Mikiko Ishikawa

The Influence of Tree Allocation and Tree Transpiration on the Urban Microclimate: An Analysis of a Subtropical Urban Park

Recently, because of the growing importance of issues such as global warming and the heat island effect, maintenance of trees and the design of planting on green land have become increasingly significant. This article focuses on variation in sap flow in, and transpiration of, Araucaria heterophylla in Tainan Park. In order to understand the relationship between the allocation of plantings and the physiological functions of trees, the influence of cover conditions and meteorological conditions related to insolation were taken into consideration. First, under the same allocating conditions, the amount of transpiration was affected by differences on the ground (grassy and sandy). The differences in cover conditions have a lot to do with the water physiology of the tree. In addition, other factors such as insolation and changes in the speed of sap flow during a day are positively correlated. The results of this study are the main factors for evaluating the allocation and density of tree plantings and also for analysing the relationship between microclimatic environments and the physiological characteristics of trees.