Effects of microbiotic crusts on dew deposition in the restored vegetation area at Shapotou, northwest China
Effects of microbiotic crusts on dew deposition in the restored vegetation area at Shapotou, northwest China
复制标题
沙坡头植被恢复区微生物结皮对露水沉降的影响
DOI：
10.1016/j.jhydrol.2005.12.004
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发表时间：
2006-08-30
影响因子：
6.4
通讯作者：
Li Xin-rong
中科院分区：
文献类型：
--
作者：
Liu Li-chao;Li Shou-zhong;Li Xin-rong
在中国沙漠地区，有关微生物结皮结露的资料很少。植被恢复区在不同年龄的植被复育圈地中分布着不同发育水平的微生物结壳，为研究与微生物结壳发育过程相关的水文问题提供了一个理想的时间序列机会。在2004年夏末和秋季，研究了微生物结皮对结露的影响。结果表明，随着微生物结壳发育程度的提高，结露量逐渐增加。物理结皮是微生物结皮的一种初始形态，由于风成成因，由粘土和粉砂比例较高的砂土组成，比砂土收集更多的露水。此外，附着在藻皮上的微生物使藻皮和苔藓上的露珠数量急剧增加。方差分析结果也表明发育良好的微生物结壳（藻类和苔藓结壳）、初始微生物结壳（物理结壳）和沙土之间存在显著差异。露水有可能通过其对微生物结壳发育的益处而成为恢复植被演替的驱动因素。(c) 2006 Elsevier B.V.版权所有
Information regarding dew deposition on microbiotic crusts is scarce in Chinese desert areas. An area of restored vegetation, where microbiotic crusts with different developmental levels are distributed in the revegetated enclosures of different ages, provides an ideal opportunity to study the hydrological issues related to the development processes of microbiotic crusts in a temporal sequence. The effects of microbiotic crusts on dew condensation were studied during the late summer and autumn of 2004. The results show that the amount of dew increases with the level of development of the microbiotic crusts. The physical crust, which is an initial form of microbiotic crust and is composed of sand with a higher proportion of clay and silt because of its aeolian origin, collects more dew than sand soil. In addition, the microorganisms adhering to the crusts cause the amounts of dew on the algae and moss crust to increase dramatically. ANOVA analysis results also indicate a significant difference between well-developed microbiotic crusts (algal and moss crusts), initial microbiotic crusts (physical crust) and sandy soil. It is potential that dew acts as a driving factor for restored vegetation succession through its benefits in the development of microbiotic crust. (c) 2006 Elsevier B.V. All rights reserved.