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题名: Analysis of environmental factors determining development and succession in biological soil crusts
作者: Lan, Shubin1; Wu, Li2; Zhang, Delu3; Hu, Chunxiang1
关键词: Shapotou ; Dalate Banner ; Inoculation ; Cyanobacteria ; Lichen ; Moss
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2015-12-15
DOI: 10.1016/j.scitotenv.2015.08.066
卷: 538, 页:492-499
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: Biological soil crusts play important ecological functions in arid and semi-arid regions, while different crust successional patterns appeared in different regions. Therefore in this study, the environmental conditions between Shapotou (with cyanobacterial, lichen and moss crusts) and Dalate Banner (with only cyanobacterial and moss crusts) regions of China were compared to investigate why lichen crusts only appeared in Shapotou; at the same time, artificial moss inoculation was conducted to find out the environmental factors promoting crust succession to moss stage. The results showed lichen crusts always developed from cyanobacterial crusts, which provide not only the stable soil surface, but also the biomass basis for lichen formation; furthermore, addition of crust physicochemical characteristics (primarily silt content) play a facilitating effect on lichen emergence (R-2 = 0.53). The inoculation experiment demonstrated early crust soil surface and enough water holding content (>4%) provided the essential guarantee for moss germination. Our results show that there is heterogeneity in crust succession in different regions, which may be mainly affected by the ambient soil microenvironments. It is concluded that a positive feedback mechanism is expected between crust succession and ambient soil microenvironments; while a negative feedback mechanism forms between crust succession and free living cyanobacteria and algae. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: COLORADO PLATEAU ; NORTHERN CHINA ; ALGAL CRUSTS ; CYANOBACTERIAL CRUSTS ; CRYPTOBIOTIC CRUSTS ; COMMUNITY STRUCTURE ; NITROGEN-FIXATION ; TENGGER DESERT ; SAND BURIAL ; DIVERSITY
语种: 英语
项目资助者: National Natural Science Foundation of China(31170464) ; Special Fund for Forest Scientific Research in the Public Welfare(201404204) ; Knowledge Innovation Program of the Chinese Academy of Sciences(Y35E021601)
WOS记录号: WOS:000363348900047
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27330
Appears in Collections:水生生物分子与细胞生物学研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Peoples R China
3.Wuhan Univ Technol, Sch Chem Chem Engn & Life Sci, Wuhan 430070, Peoples R China
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