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学科主题: Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
题名: Small-Scale Vertical Distribution of Algae and Structure of Lichen Soil Crusts
作者: Wu, Li ; Lan, Shubin ; Zhang, Delu ; Hu, Chunxiang
通讯作者: Hu, CX (reprint author), Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China ; cxhu@ihb.ac.cn
关键词: BLUE-GREEN-ALGAE ; COLORADO PLATEAU ; DESERT CRUSTS ; EASTERN AUSTRALIA ; NEGEV DESERT ; CO2 EXCHANGE ; ARID LANDS ; CYANOBACTERIA ; WATER ; PHOTOSYNTHESIS
刊名: MICROBIAL ECOLOGY
发表日期: 2011
卷: 62, 期:3, 页:715-724
收录类别: SCI
部门归属: [Wu, L; Lan, SB; Zhang, DL; Hu, CX] Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Wu, L; Lan, SB] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China; [Zhang, DL] Wuhan Univ Technol, Dept Biol Sci & Biotechnol, Wuhan 430070, Peoples R China
资助者: National Natural Science Foundation of China[30870470]; National Principal Expert Program[2008ZX07103-004, 2009ZX07106-001-003]; National Basic Research Programs of China[2008CB418001]
摘要: Although many studies have been conducted on the ecological functions and ecophysiological characteristics of lichen soil crusts (LSCs), no explanation of these results has been provided based on crust structures. Using algae soil crusts (ASCs) as comparison, this work studied the small-scale vertical distribution of algal biomass and stratification in two types of LSCs, by combining the binocular stereomicroscope observations, microscope observations, plate cultures, chlorophyll analysis, and polysaccharides analysis. The results showed an obvious difference in the proportion but not the composition of the algae species between the ASCs and the two LSCs. Approximately 60% and 80% of the total algal biomass were concentrated in the top 1 mm of the soil profile and thalli in the ASCs and LSCs, respectively. This implies that symbiotic algae are the dominant species and primary organic carbon producers in LSCs, and the algal biomass decreased with the depth in both the ASCs and LSCs. The small-scale vertical distributions of the crustal algal biomass and polysaccharides were characterized by obvious successional stage, whereas these were unrelated to the crust type within the successional stage. Additionally, a large amount of fungi, which were always piercing the entire crusts, were observed in the LSCs, but only occasionally in the ASCs. These special structures are purported to cause the LSCs to achieve specific ecological functions, such as higher carbon fixation and greater compressive strength. High biomass, large living space, and advantageous resource utilization privilege suggest that the lichen association is mutualistic and the direction from ASCs to LSCs is developmental.
语种: 英语
WOS记录号: WOS:000294963300020
ISSN号: 0095-3628
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16361
Appears in Collections:藻类生物学及应用研究中心_期刊论文

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Recommended Citation:
Wu, Li; Lan, Shubin; Zhang, Delu; Hu, Chunxiang.Small-Scale Vertical Distribution of Algae and Structure of Lichen Soil Crusts,MICROBIAL ECOLOGY,2011,62(3):715-724
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