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学科主题: 地理学::自然地理学
题名:
The influence of biological soil crusts on dew deposition in Gurbantunggut Desert, Northwestern China
作者: Zhang Jing ; Zhang Yuan-ming ; Downing ; Alison ; Cheng Jun-hui ; Zhou Xiao-bing ; Zhang Bing-chang
通讯作者: Zhang, YM, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China
关键词: NEGEV DESERT ; MICROBIOTIC CRUSTS ; TORTULA-RURALIS ; DEPENDENT DEW ; WATER ; ISRAEL ; HIGHLANDS ; MOISTURE ; FOG ; PHOTOSYNTHESIS
刊名: JOURNAL OF HYDROLOGY
发表日期: 2009
卷: 379, 期:40606, 页:220-228
收录类别: SCI
部门归属: [Zhang Jing; Zhang Yuan-ming; Cheng Jun-hui; Zhou Xiao-bing; Zhang Bing-chang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China; [Zhang Jing; Cheng Jun-hui; Zhou Xiao-bing; Zhang Bing-chang] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Downing, Alison] Macquarie Univ, Dept Biol Sci, N Ryde, NSW 2109, Australia
摘要: Dew is an important source of moisture for plants, biological soil crusts, invertebrates and small vertebrates in desert environments. In this paper, measurements were taken to investigate the effects of three different types of biological soil crusts (cyanobacteria, lichen and moss) and bare sand on dew deposition in the Gurbantunggut Desert. Dew quantities were measured using micro-lysimeters with a diameter of 6 cm and a height of 3.5 cm. The results showed that the total amount of dew deposited increased with the development of soil crusts, from bare sand to cyanobacterial crust to lichen crust to moss crust. The average amount of dew deposited daily on the moss crust was the highest of all and it was significant higher than the other three soil surfaces (lichen crust, cyanobacterial crust and bare sand) (p < 0.05). During the period of the study, for each type of crust studied, the maximum amount of dew recorded was several times greater than the minimum. Moss crust was characterized by having the greatest amount of dew at dawn and also the maximum amount of dew deposited, whereas bare sand yielded the lowest amount of dew, with lichen crust and cyanobacterial crust exhibiting intermediate values. However, this was not the case for dew duration, as bare sand retained moisture for the longest period of time, followed by cyanobacterial crust, moss crust and finally lichen crust. Dew continued to condense even after sunrise. Furthermore, the differences in dew deposition may be partially attributed to an effect of the biological soil crusts on surface area. This study demonstrates the important effect of biological soil crusts upon dew deposition and may assist in evaluating the role of dew in and and semi-arid environments. (C) 2009 Elsevier B.V. All rights reserved.
内容类型: 期刊论文
URI标识: http://ir.xjlas.org/handle/365004/10048
Appears in Collections:中国科学院新疆生态与地理研究所(2010年以前数据)_期刊论文

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Recommended Citation:
Zhang Jing,Zhang Yuan-ming,Downing,et al. The influence of biological soil crusts on dew deposition in Gurbantunggut Desert, Northwestern China[J]. JOURNAL OF HYDROLOGY,2009,379(40606):220-228.
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