Mechanical disturbance of microbiotic crusts affects ecohydrological processes in a region of revegetation-fixed sand dunes
文献类型：期刊论文
| 作者 | Li, SZ; Xiao, HL; Cheng, GD; Luo, F; Liu, LC |
| 刊名 | ARID LAND RESEARCH AND MANAGEMENT
 |
| 出版日期 | 2006 |
| 卷号 | 20期号:1页码:61-77 |
| 关键词 | infiltration process soil water content evaporation annual herbs Tengger desert |
| ISSN号 | 1532-4982 |
| DOI | 10.1080/15324980500369467 |
| 通讯作者 | Li, SZ(lisz126@126.com) |
| 英文摘要 | Microbiotic crusts (MC), also called biological soil crusts or cryptogamic crusts, are formed by cyanobacteria, fungi, blue-green algae, lichens, and mosses, and are widespread in arid and semiarid zones such as the area of sands fixed in place by revegetation near Shapotou at the southeastern edge of China's Tengger Desert. We studied mechanically disturbed and 40-year-old intact MC in this area using a series of soil hydrological experiments and ecological investigations to examine the ecohydrological responses after mechanical disturbance of the MC Once the MC was disturbed, the MC layer became ore primitive or disappeared entirely, resulting in a 32.8% decrease in the fine particles content of the upper soil layers, a 28.7% increase in soil albedo and a 168.9% decrease in the topsoil's water-retention capacity. These changes greatly altered soil hydrological processes in the disturbed soils: the steady-state infiltration rates in the tipper soil layer increased by 693%, the precipitation recharge layer deepened, and the surface evaporation rate decreased by 20.3%. Moreover, the disturbance increased storage of plant-available water in the herbaceous rooting zone and improved the environment for germination and subsequent growth of annual herb species, as shown by a notable increase in the coverage, density, frequency, and biomass of annual plants. We conclude that MC represent a major component of Shapotou's regional ecosystem and that disturbance will significantly alter local ecohydrological processes. |
| 收录类别 | SCI |
| WOS关键词 | SEMIARID WOODLAND ; CRYPTOGAM COVER ; ARID DESERT ; SOIL CRUSTS ; INFILTRATION ; VEGETATION ; ISRAEL ; NEGEV |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| WOS类目 | Environmental Sciences ; Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000235304600005 |
| 出版者 | TAYLOR & FRANCIS INC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555747 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Li, SZ |
| 作者单位 | 1.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Peoples R China 2.Chinese Acad Sci, Shapotou Desert Res & Expt Stn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, SZ,Xiao, HL,Cheng, GD,et al. Mechanical disturbance of microbiotic crusts affects ecohydrological processes in a region of revegetation-fixed sand dunes[J]. ARID LAND RESEARCH AND MANAGEMENT,2006,20(1):61-77. |
| APA | Li, SZ,Xiao, HL,Cheng, GD,Luo, F,&Liu, LC.(2006).Mechanical disturbance of microbiotic crusts affects ecohydrological processes in a region of revegetation-fixed sand dunes.ARID LAND RESEARCH AND MANAGEMENT,20(1),61-77. |
| MLA | Li, SZ,et al."Mechanical disturbance of microbiotic crusts affects ecohydrological processes in a region of revegetation-fixed sand dunes".ARID LAND RESEARCH AND MANAGEMENT 20.1(2006):61-77. |
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来源：寒区旱区环境与工程研究所
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