Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2015.01.004 |
Unusual canopy architecture in the umbrella thorn acacia, Vachellia tortilis (= Acacia tortilis), in the United Arab Emirates | |
Ross, Zachary; Burt, John | |
通讯作者 | Burt, John |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2015 |
卷号 | 115页码:62-65 |
英文摘要 | Populations of the umbrella thorn acacia, Vechellia tortilis (formerly Acacia Wallis), in the United Arab Emirates (UAE) have an unusual tilted canopy architecture compared with the flat or dome-shaped morphology typical throughout its pan-tropical range. UAE populations were shown to have a distinctive tilt as a result of consistent height and canopy angle differences between opposing sides of canopies. These tilted canopies were found to be highly directional in their orientation, facing almost due south. The wind environment and latitude were excluded as potential causes for this morphology. Canopies of V. tortilis were shown to have a mean compass orientation and slope which maximized canopy exposure to the midday sun, specifically during peak summer when climactic conditions are extreme relative to populations elsewhere in the pan-tropical range of this species. It is suggested that the unique canopy architecture characteristic of the UAE population is a plastic response which maximizes soil shading and reduces soil temperature around the base of the tree. Such shading would reduce evaporative loss of soil moisture that had been deposited in the surface layers by hydraulic lift from the taproots, enhancing total water availability and water transport efficiency in this hot, hyper-arid climate. (C) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Canopy Architecture Morphology Xeric Desert Arabia |
类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates |
收录类别 | SCI-E |
WOS记录号 | WOS:000350778400009 |
WOS关键词 | IMPORTANT PLANT AREAS ; EAST-AFRICAN SAVANNA ; NEGEV DESERT ; LOW-RAINFALL ; TREES ; VEGETATION ; SHADE ; MIMOSOIDEAE ; ASSOCIATION ; POPULATIONS |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188308 |
作者单位 | New York Univ, Ctr Genom & Syst Biol, Abu Dhabi, U Arab Emirates |
推荐引用方式 GB/T 7714 | Ross, Zachary,Burt, John. Unusual canopy architecture in the umbrella thorn acacia, Vachellia tortilis (= Acacia tortilis), in the United Arab Emirates[J],2015,115:62-65. |
APA | Ross, Zachary,&Burt, John.(2015).Unusual canopy architecture in the umbrella thorn acacia, Vachellia tortilis (= Acacia tortilis), in the United Arab Emirates.JOURNAL OF ARID ENVIRONMENTS,115,62-65. |
MLA | Ross, Zachary,et al."Unusual canopy architecture in the umbrella thorn acacia, Vachellia tortilis (= Acacia tortilis), in the United Arab Emirates".JOURNAL OF ARID ENVIRONMENTS 115(2015):62-65. |
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