气候变化领域集成服务门户(CCPortal): Microorganisms in the Malan ice core and their relation to climatic and environmental changes

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DOI	10.1029/2004GB002424
	Microorganisms in the Malan ice core and their relation to climatic and environmental changes
	Yao, TD; Xiang, SR; Zhang, XJ; Wang, NL; Wang, YQ
发表日期	2006
ISSN	0886-6236
EISSN	1944-9224
卷号	20 期号:1
英文摘要	[1] A 102-m-long ice core retrieved from the Malan Ice Cap on the Tibetan Plateau provides us with a historical record of the microorganisms trapped in the ice. The microorganisms in the Malan ice core are identified as alpha, beta, and gamma-Proteobacteia, and the LGC, HGC, and CFB group by means of the results of 16S rRNA sequence analysis and physiological characteristics, while the eukaryotes in the ice core are mainly composed of Chlamydomonas sp. and Pseudochlorella sp. based on the phylogenetic examination of the 18S rRNA gene. The microbial populations show observable differences at different depths in the ice core, reflecting the effects of climatic and environmental changes on the distribution of the microorganisms in the glacier. Examination of the Malan ice core shows four general periods of microbial concentration, which correspond to four phases of temperature revealed by delta O-18 values in the core. Observations also indicate that microorganism concentrations tend to be negatively correlated with the temperature at a relatively long timescale and, to some extent, positively correlated with mineral concentrations. The present study demonstrates that more microorganisms are associated with colder periods while fewer microorganisms are associated with warm periods, which provides us with a new proxy for the reconstruction of past climatic and environmental changes by means of ice core analysis.
关键词	DRY VALLEY LAKES AIR-TEMPERATURE GLACIER ICE SNOW ALGAE SEA-ICE BACTERIA ANTARCTICA DIVERSITY RECORD BIODIVERSITY
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000234998800001
来源期刊	GLOBAL BIOGEOCHEMICAL CYCLES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/446
推荐引用方式 GB/T 7714	Yao, TD,Xiang, SR,Zhang, XJ,et al. Microorganisms in the Malan ice core and their relation to climatic and environmental changes[J]. 中国科学院青藏高原研究所,2006,20(1).
APA	Yao, TD,Xiang, SR,Zhang, XJ,Wang, NL,&Wang, YQ.(2006).Microorganisms in the Malan ice core and their relation to climatic and environmental changes.GLOBAL BIOGEOCHEMICAL CYCLES,20(1).
MLA	Yao, TD,et al."Microorganisms in the Malan ice core and their relation to climatic and environmental changes".GLOBAL BIOGEOCHEMICAL CYCLES 20.1(2006).