气候变化领域集成服务门户(CCPortal): Ostracod-based environmental reconstruction over the last 8,400 years of Nam Co Lake on the Tibetan plateau

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DOI	10.1007/s10750-010-0149-3
	Ostracod-based environmental reconstruction over the last 8,400 years of Nam Co Lake on the Tibetan plateau
	Zhu, Liping; Peng, Ping; Xie, Manping; Wang, Junbo; Frenzel, Peter; Wrozyna, Claudia; Schwalb, Antje
通讯作者	Zhu, LP (通讯作者)
发表日期	2010
ISSN	0018-8158
EISSN	1573-5117
起始页码	157
结束页码	174
卷号	648 期号:1
英文摘要	From a 332-cm long lacustrine core taken at 60 m water depth and 25 surface sediment samples taken at different water depth sites in Nam Co lake (4,718 m a.s.l.) in the middle-south part of the Tibetan Plateau, we identified nine species of ostracods (Crustacea: Ostracoda) belonging to six genera. Using lithological data, auto-ecological information of the recovered taxa and an ostracod-based transfer function for water depth reconstruction, we distinguished three main environmental stages over the past 8,400 years: during Stage I (8,400-6,800 yr BP), the climate changed from warm-humid to cold-humid, and eventually to cold-arid. The water depth of the site was much lower than today and changed from an estimated 50 to 20-30 m. During Stage II (6,800-2,900 yr BP), environmental conditions were again warm-humid, turning into a cold-arid episode. The lake water depth initially stayed much shallower than today, but then gradually deepened to around 50 m. At the earlier period of Stage III (2,900 yr BP-present), the climate became again warm-humid from cold-arid status. There was a cold-dry event between 1,700 and 1,500 yr BP, which intensified afterward while the surface run off weakened. Early in this stage, lake depth decreased slightly, but then it continuously deepened to 60 m. Our results revealed that central Tibet experienced wavily warm toward tendency in early Holocene, a shift from warm-humid to cold-dry conditions in the middle Holocene, and from warm-humid to cold-dry conditions in the late Holocene. They also show that ostracod assemblages are not only indicative of cold-warm conditions, but are also usable to imply the dry-wet status of a lake area by the inferring water depth variations. Finally, this study provides baseline data on (natural) climate change in this mountain region against which to compare global change impacts.
关键词	BASIN WESTERN TIBET SEDIMENTS QINGHAI CLIMATE CHINA RECORD XIZANG PALEOLIMNOLOGY ASSEMBLAGES CRUSTACEA
英文关键词	Holocene environmental change; Lacustrine core; Ostracoda; Tibetan plateau; Water depth reconstruction
语种	英语
WOS研究方向	Marine & Freshwater Biology
WOS类目	Marine & Freshwater Biology
WOS记录号	WOS:000277284000012
来源期刊	HYDROBIOLOGIA
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/257817
推荐引用方式 GB/T 7714	Zhu, Liping,Peng, Ping,Xie, Manping,et al. Ostracod-based environmental reconstruction over the last 8,400 years of Nam Co Lake on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2010,648(1).
APA	Zhu, Liping.,Peng, Ping.,Xie, Manping.,Wang, Junbo.,Frenzel, Peter.,...&Schwalb, Antje.(2010).Ostracod-based environmental reconstruction over the last 8,400 years of Nam Co Lake on the Tibetan plateau.HYDROBIOLOGIA,648(1).
MLA	Zhu, Liping,et al."Ostracod-based environmental reconstruction over the last 8,400 years of Nam Co Lake on the Tibetan plateau".HYDROBIOLOGIA 648.1(2010).