Arid
DOI10.1071/BT16008
Modelling the influence of snowfall on cyanobacterial crusts in the Gurbantunggut Desert, northern China
Hui, R.1; Zhao, R. M.2; Liu, L. C.1; Li, G.1; Yang, H. T.1; Gao, Y. H.1; Wang, X. Q.3
通讯作者Hui, R.
来源期刊AUSTRALIAN JOURNAL OF BOTANY
ISSN0067-1924
EISSN1444-9862
出版年2016
卷号64期号:6页码:476-483
英文摘要

Biological soil crusts (BSCs) are widespread in arid and semiarid regions. They have long been regarded as a key biotic component of desert ecosystems. However, little information is available regarding the influence of snowfall on BSCs in desert ecosystems. Therefore, we conducted the present work in the largest fixed and semi-fixed desert in China, the Gurbantunggut Desert, where snowfall is a special form of precipitation, and snow cover is a prerequisite for BSC survival during the harsh winter. We investigated the effects of altered winter snowfall on biomass, chlorophyll (Chl) fluorescence, moisture content, and soluble-protein and malondialdehyde (MDA) concentrations in cyanobacterial crusts in the early (March) and late (October) periods after snowfall in 2014. The results indicated that biomass (indicated by Chl a), Chl fluorescence (i.e. maximum photochemical efficiency, fluorescence yield and rates of electron transport) and the concentration of soluble protein of cyanobacterial crusts declined as a result of lower soil water content resulting from snow removal or reduction. Increased snowfall had positive effects on physiological properties associated with photosynthesis but induced dramatic decreases in the MDA concentration in cyanobacterial crusts. In addition, photosynthesis of cyanobacterial crusts was obviously higher in the late than in the early period after snowfall, which can be attributed to increases in the cover of cyanobacteria in the crust communities. These findings provided evidence that increased snowfall in the Gurbantunggut Desert could favour and help maintain the development of BSCs.


英文关键词biomass chlorophyll (Chl) fluorescence moisture content physiological activities
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000384673500002
WOS关键词BIOLOGICAL SOIL CRUSTS ; DIFFERENT SUCCESSIONAL STAGES ; TENGGER-DESERT ; DISTRIBUTION PATTERNS ; MICROBIAL ACTIVITY ; CARBON FIXATION ; CO2 EXCHANGE ; GROWTH ; GERMINATION ; RESPONSES
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构兰州大学 ; 中国科学院新疆生态与地理研究所 ; 中国科学院西北生态环境资源研究院
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191683
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China;
2.Lanzhou Univ, Sch Life Sci, Lanzhou 730000, Peoples R China;
3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714
Hui, R.,Zhao, R. M.,Liu, L. C.,et al. Modelling the influence of snowfall on cyanobacterial crusts in the Gurbantunggut Desert, northern China[J]. 兰州大学, 中国科学院新疆生态与地理研究所, 中国科学院西北生态环境资源研究院,2016,64(6):476-483.
APA Hui, R..,Zhao, R. M..,Liu, L. C..,Li, G..,Yang, H. T..,...&Wang, X. Q..(2016).Modelling the influence of snowfall on cyanobacterial crusts in the Gurbantunggut Desert, northern China.AUSTRALIAN JOURNAL OF BOTANY,64(6),476-483.
MLA Hui, R.,et al."Modelling the influence of snowfall on cyanobacterial crusts in the Gurbantunggut Desert, northern China".AUSTRALIAN JOURNAL OF BOTANY 64.6(2016):476-483.
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