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学科主题: 地球科学::地质学
题名: Discovery of bacteriopheophytin-a in lacustrine deposits from Lake Zigetang on the central Tibetan Plateau and its paleoenvironmental significance
作者: Li, HY (Li, HuaYong)1, 2; Zhang, HC (Zhang, HuCai)1; Chang, FQ (Chang, FengQin)1; Zheng, Q (Zheng, Qian)3; Zhang, WX (Zhang, WenXiang)1; Lei, GL (Lei, GuoLiang)4; Lei, YB (Lei, YanBin)5; Pu, Y (Pu, Yang)6; Ji, JF (Ji, JunFeng)7
通讯作者: Zhang, HC ; Chang, FQ
关键词: ANOXYGENIC PHOTOTROPHIC BACTERIA ; PURPLE SULFUR BACTERIA ; MEROMICTIC LAKE ; BLACK-SEA ; FOSSIL PIGMENTS ; CLIMATE-CHANGE ; MONO LAKE ; RECORD ; LIGHT ; STRATIFICATION
刊名: SCIENCE CHINA-EARTH SCIENCES
发表日期: 2017
DOI: 10.1007/s11430-017-9107-9
卷: 60, 期:12, 页:2171-2180
收录类别: SCI
合作性质: 国内
文章类型: Article
类目[WOS]: Geosciences, Multidisciplinary ; Geology
研究领域[WOS]: Geology
英文摘要: Lake Zigetang is located on the central Tibetan Plateau (TP) and represents a rare but typical meromictic lake in China. The lake's stable meromixis sustains microflora communities, and changes in these communities are relatively independent of climate. Therefore, these communities can be used as paleoclimate proxies. In this paper, the stratification properties and their relationships with the microflora of Lake Zigetang were analyzed. We found that water depth and climate conditions were two important factors for maintaining meromixis in Lake Zigetang. Generally, stratification was enhanced during warm periods, while temperature differences between the mixolimnion and monimolimnion were decreased during cold periods. The presence of anoxygenic phototrophic bacteria (APB) was demonstrated by the discovery of bacteriopheophytin-a (Bph-a) in the sediments. This bacterial community is mainly concentrated at the bottom of the chemocline and the top of the monimolimnion, where it forms a thin APB layer. Moreover, total APB productivity is mainly affected by the light intensity penetrating to the APB layer, which exponentially increases as the thermocline becomes shallow. Therefore, high Bph-a values in the lake corresponded to a shallow thermocline and warm periods, low Bph-a values corresponded to cold periods, and zero changes indicated that the water was completely mixed and reflected an extreme cold climate or low lake level period. Thus, Bph-a can be used as a climate proxy to reconstruct the history of lake stratification and climate changes.
WOS记录号: WOS:000417942100010
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内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7927
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Yunnan Normal Univ, Coll Tourism & Geog Sci, Key Lab Plateau Lake Ecol & Global Change, Yunnan Prov Key Lab Plateau Geog Proc & Environm, Kunming 650500, Yunnan, Peoples R China.
2.Anyang Normal Univ, Sch Resource Environm & Tourism, Anyang 455000, Peoples R China.
3.Cent China Normal Univ, Coll Urban & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
4.Fujian Normal Univ, Key Lab Subtrop Mt Ecol, Minist Sci & Technol & Fujian Prov Funded, Fuzhou 350007, Fujian, Peoples R China.
5.Chinese Acad Sci, Inst Tibetan Plateau Res, Lab Tibetan Environm Changes & Land Surface Proc, Beijing 100085, Peoples R China.
6.Nanjing Univ Informat Sci & Technol, Sch Remote Sensing, Nanjing 210044, Jiangsu, Peoples R China.
7.Nanjing Univ, Inst Surface Geochem, Dept Earth Sci, Nanjing 210093, Jiangsu, Peoples R China.

Recommended Citation:
Li, HY ,Zhang, HC ,Chang, FQ ,et al. Discovery of bacteriopheophytin-a in lacustrine deposits from Lake Zigetang on the central Tibetan Plateau and its paleoenvironmental significance[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(12):2171-2180.
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