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题名: Successional stages of biological soil crusts and their microstructure variability in Shapotou region (China)
作者: Lan, Shubin1, 2; Wu, Li1, 2; Zhang, Delu1, 3; Hu, Chunxiang1
通讯作者: Hu, CX (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
关键词: Biological soil crusts ; Succession ; Vertical stratification ; Cementing ; Phototrophic organisms
刊名: ENVIRONMENTAL EARTH SCIENCES
发表日期: 2012
DOI: 10.1007/s12665-011-1066-0
卷: 65, 期:1, 页:77-88
收录类别: SCI
文章类型: Article
部门归属: [Lan, Shubin; Wu, Li; Zhang, Delu; Hu, Chunxiang] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Lan, Shubin; Wu, Li] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Zhang, Delu] Wuhan Univ Technol, Dept Biol Sci & Biotechnol, Wuhan 430070, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
资助者: National Natural Science Foundation of China[30870470]; National Principal Expert Program[2009ZX07106-001-003]; National Basic Research Programs of China[2008CB418001]; Wuhan Science and Technology Bureau; Inner Mongolia Planning Committee on high-tech industrialization
类目[WOS]: Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
研究领域[WOS]: Environmental Sciences & Ecology ; Geology ; Water Resources
摘要: In order to investigate succession of biological soil crusts (BSCs) and their microstructure variability, we conducted this work in Shapotou revegetation region at the southeast edge of Tengger Deser. The results showed that BSCs generally succeeded as a pathway of "Algae crusts, algae-lichen crusts, lichen crusts, lichen-moss crusts and moss crusts". Occasionally mosses directly occurred on algae crusts, and BSCs succeeded from algae crusts to moss crusts. Crust vertical stratification was a common phenomenon, from top to bottom an inorganic layer, algaedense layer and algae-sparse layer were divided in algae crusts; a thallus layer, rhizoid layer and sub-rhizoid layer in lichen crusts; a "stem-leaf" layer, rhizoid layer and sub-rhizoid layer in moss crusts, respectively. The main crust binding organisms varied from filamental cyanobacteria (dominated by Microcoleus) in algae crusts to lichen rhizoids, free-living cyanobacterial filaments and fungal hyphaes in lichen crusts, and to moss rhizoids and fungal hyphaes in moss crusts. The dominant phototrophic organisms varied from Microcoleus (algae) in algae crusts to Collema (lichens) in lichen crusts, and to Bryum (or Didymodon and Tortula; mosses) in moss crusts. Total phototrophic biomass increased while the free-living algal biomass decreased with the succession of BSCs. In addition, exopolysaccharides and fine particles accumulated in the course of development and succession of BSCs, all of which lead to a gradual increase in crust thickness and porosity, while decrease in the bulk density.
英文摘要: In order to investigate succession of biological soil crusts (BSCs) and their microstructure variability, we conducted this work in Shapotou revegetation region at the southeast edge of Tengger Deser. The results showed that BSCs generally succeeded as a pathway of "Algae crusts, algae-lichen crusts, lichen crusts, lichen-moss crusts and moss crusts". Occasionally mosses directly occurred on algae crusts, and BSCs succeeded from algae crusts to moss crusts. Crust vertical stratification was a common phenomenon, from top to bottom an inorganic layer, algaedense layer and algae-sparse layer were divided in algae crusts; a thallus layer, rhizoid layer and sub-rhizoid layer in lichen crusts; a "stem-leaf" layer, rhizoid layer and sub-rhizoid layer in moss crusts, respectively. The main crust binding organisms varied from filamental cyanobacteria (dominated by Microcoleus) in algae crusts to lichen rhizoids, free-living cyanobacterial filaments and fungal hyphaes in lichen crusts, and to moss rhizoids and fungal hyphaes in moss crusts. The dominant phototrophic organisms varied from Microcoleus (algae) in algae crusts to Collema (lichens) in lichen crusts, and to Bryum (or Didymodon and Tortula; mosses) in moss crusts. Total phototrophic biomass increased while the free-living algal biomass decreased with the succession of BSCs. In addition, exopolysaccharides and fine particles accumulated in the course of development and succession of BSCs, all of which lead to a gradual increase in crust thickness and porosity, while decrease in the bulk density.
关键词[WOS]: WESTERN NEGEV-DESERT ; TENGGER DESERT ; ALGAL CRUSTS ; NORTHERN CHINA ; GURBANTUNGGUT DESERT ; MICROBIOTIC CRUSTS ; NORTHWESTERN CHINA ; NITROGEN-FIXATION ; COLORADO PLATEAU ; CO2 EXCHANGE
语种: 英语
WOS记录号: WOS:000298800300008
ISSN号: 1866-6280
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16781
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Wuhan Univ Technol, Dept Biol Sci & Biotechnol, Wuhan 430070, Peoples R China

Recommended Citation:
Lan, Shubin; Wu, Li; Zhang, Delu; Hu, Chunxiang.Successional stages of biological soil crusts and their microstructure variability in Shapotou region (China),ENVIRONMENTAL EARTH SCIENCES,2012,65(1):77-88
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