Wind Speed Response of Sap Flow in Five Subtropical Trees Based on Wind Tunnel Experiments
Sophie Laplace, Tomonori Kume, Chia-Ren Chu, Hikaru Komatsu
International Journal of Environment and Climate Change · pp. 160–171 · Published 31 Jul 2013
10.9734/BJECC/2013/3842Abstract
Aims: We evaluated the responses of tree sap flow to wind speeds in coniferous and broad-leaved plants under steady and unsteady wind conditions. Study Design: We performed sap flow and micro-meteorological measurements on two conifers, Chamaecyparis obtusa var. formosana and Araucaria cunninghamii, and three broadleaved species, Swietenia mahagoni, Michelia formosana and Plumeria acutifolia in a wind tunnel. Place and Duration of Study: Civil Engineering Department, National Central University, Zhongli, Taiwan, China, between May and July 2011. Methodology: In a wind tunnel, wind speed was increased incrementally from 0 to 2, 4, 6, and 8 m s–1, then decreased from 8 to 0 m s–1. To examine how sap flow responded to unsteady wind, we estimated the time constant of each individual for each step change in wind speed. Moreover, we examined differences in transpiration rate and leaf conductance among individuals under stable wind speeds. Results: The time constant was generally about 30 min in both conifers and broadleaved individuals. Interestingly, under steady winds, transpiration rate showed two different response patterns to increased wind speed: linear and saturated. The two patterns may be a consequence of different stomatal conductance values, but not of different leaf shapes. Conclusion: Our results suggested that neither hydraulic system nor leaf shape differences between coniferous and broad-leaved trees was an ultimate factor affecting the transient response of tree sap flux and transpiration to wind speed, and that stomatal conductance played an important role in transpiration regulation in response to wind speed.
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Cited by 14
Ge Sun, Catalina Segura · International Journal of Environment and Climate Change · 2013
Xiao-Wei Zhao, Li-Wei Zhu · Frontiers in Forests and Global Change · 2025
C. H. Stone, D. Close, R. Corkrey · Scientific Reports · 2022
C. H. Stone, D. Close, S. A. Bound · Acta Horticulturae · 2022
H. Tseng, Chen-Wei Chiu, Sophie Laplace · Trees · 2017
T. Kume, Sophie Laplace, H. Komatsu · Trees · 2014
R. Kjelgren, R. Beeson, D. Pittenger · 2018
R. Kjelgren, R. Beeson, Dennis P Pittenger · 2015
Showing 8 of 14 known citations — external sources report more than can currently be individually listed.
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