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题名:
The Role of Nonphotosynthetic Microbes in the Recovery of Biological Soil Crusts in the Gurbantunggut Desert, Northwestern China
作者: Wu, N. ; Zhang, Y. M. ; Pan, H. X. ; Zhang, J.
通讯作者: Zhang, YM, Chinese Acad Sci, Key Lab Biogeog & Bioresources Arid Land, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
关键词: EXTRACELLULAR CARBOHYDRATE POLYMERS ; SUCCESSIONAL STAGES ; MICROBIOTIC CRUSTS ; COLORADO PLATEAU ; CYANOBACTERIAL INOCULATION ; CHIHUAHUAN DESERT ; NATIONAL MONUMENT ; HEATED SOILS ; WIND EROSION ; ARID LANDS
刊名: ARID LAND RESEARCH AND MANAGEMENT
发表日期: 2010
卷: 24, 期:1, 页:42-56
收录类别: SCI
部门归属: [Wu, N.; Zhang, Y. M.; Pan, H. X.; Zhang, J.] Chinese Acad Sci, Key Lab Biogeog & Bioresources Arid Land, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China; [Zhang, J.] Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
摘要: The mechanisms regulating the recovery of biological soil crusts (BSCs) due to the presence of nonphotosynthetic microbes were investigated using a soil scalping technique. Microscopic examinations identified the oglueo and oropeo action of bacteria and fungi at the initial stages of recovery of BSCs prior to the appearance of cyanobacteria. Extracellular polymeric substances (EPS) excreted by bacteria principally contained glucose and mannose. The optimum conditions for EPS production included the availability of glucose as the carbon source, the presence of CaCO3 (2g/L), KH2PO4 (0.3g/L), and MgSO4 (0.1g/L), a pH of 7 and incubation at 37 degrees C for 72h. Crust-forming tests in the laboratory and in the field demonstrated that inoculation of bare sand with oligotrophic bacteria was effective in accelerating the recovery of BSCs. The number of nonphotosynthetic microbes (especially actinomycetes and fungi) recorded in both the crust layer (0-2cm) and subsurface layer (2-5cm) was higher after 3 years than after 1 year. Microbial spatial variability of BSCs was related to nutrient status, especially available N.
内容类型: 期刊论文
URI标识: http://ir.xjlas.org/handle/365004/10042
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:
Wu, N.,Zhang, Y. M.,Pan, H. X.,et al. The Role of Nonphotosynthetic Microbes in the Recovery of Biological Soil Crusts in the Gurbantunggut Desert, Northwestern China[J]. ARID LAND RESEARCH AND MANAGEMENT,2010,24(1):42-56.
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