Subtropical-tropical urban tree water relations and drought stress response strategies

Kjelgren, Roger, Joyce, Daryl and Doley, David (2013) Subtropical-tropical urban tree water relations and drought stress response strategies. Arboriculture and Urban Forestry, 39 3: 124-130.

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Name Description MIMEType Size Downloads
Author Kjelgren, Roger
Joyce, Daryl
Doley, David
Title Subtropical-tropical urban tree water relations and drought stress response strategies
Journal name Arboriculture and Urban Forestry   Check publisher's open access policy
ISSN 1935-5297
Publication date 2013-05
Sub-type Article (original research)
Volume 39
Issue 3
Start page 124
End page 130
Total pages 7
Place of publication Champaign, IL, United States
Publisher International Society of Arboriculture
Collection year 2014
Language eng
Formatted abstract
Understanding native habitats of species successful as subtropical and tropical urban trees yield insights into how to minimize urban tree water deficit stress experienced during monsoonal dry periods. Equatorial and montane wet forest species rarely subject to drought are generally absent in subtropical and tropical cities with pronounced monsoonal dry seasons. Species native to monsoonal dry forests appear to have wide environmental tolerances, and are successful as urban trees in many tropical cities. Monsoonal dry forest species have a tendency to be deep rooted to avoid drought, with leaf habits falling along an avoidance to tolerance spectrum. Dry deciduous species, typically found on more fertile soils, maximize growth during the monsoonal wet season with high photosynthesis and transpiration rates, then defoliate to avoid stress during the dry season. Evergreen tree species, typically found on less fertile soils, have a higher carbon investment in leaves that photosynthesize and transpire less year-round than do dry deciduous species. Dry deciduous tree species are more common urban trees than dry evergreen species explicitly due to more ornamental floral displays, but also implicitly due to their ability to adjust timing and duration of defoliation in response to drought. An empirical study of three tropical species exhibiting a range of leaf habits showed isohydric behavior that moderates transpiration and conserves soil water during drying. However, dry evergreen species may be less adaptable to tropical urban conditions of pronounced drought, intense heat, and limited rooting volumes than dry deciduous species with malleable leaf habit.
Keyword Climate change
Drought deciduous
Drought physiology
Dry evergreen
Lagerstroemia loudonii
Pterocarpus indicus
Swietenia macrophylla
Urban forestry
Water stress
Wet evergreen
Climate change adaptation
Plant physiology
Q-Index Code CX
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Mined Land Rehabilitation Publications
School of Agriculture and Food Sciences
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Created: Thu, 14 Nov 2013, 10:43:26 EST by Dr David Doley on behalf of School of Agriculture and Food Sciences