干旱区生态环境知识资源中心(Arid): 乌鲁木齐东道海子剖面的硅藻记录与环境演变

Arid

	乌鲁木齐东道海子剖面的硅藻记录与环境演变
其他题名	Diatom Records and Environmental Changes of the Dongdaohaizi Area in Urumqi,Xinjiang
	李树峰 1; 阎顺 1; 孔昭宸 2; 倪健 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2005
卷号	28 期号:1 页码:81-87
中文摘要	通过分析乌鲁木齐河尾闾湖泊东道海子剖面的硅藻记录,结合孢粉、磁化率、烧失量和粒度分析资料,以 14C测年数据为基础,讨论了天山北麓古尔班通古特沙漠南部边缘的环境演变.研究认为:东道海子地区在4 900 a BP～3 120 a BP这一时段气候较稳定,3 120 a BP以来,有几次波动;湖泊的高湖面期与气候的冷期对应,湖泊的盐碱度较低,硅藻以及水生、沼生植物生长较繁盛;湖泊的中湖面期与气候的暖期对应,湖泊的盐碱度较高,硅藻以及水生、沼生植物生长较稀少.
英文摘要	In this paper, high-precision analysis on diatom is carried out on a section of the Dongdaohaizi Lake, a terminal lake of the Urumqi River, which is located in the south of the Junggar Basin. Based on the data of the diatom analysis, magnetic susceptibility, loss on ignition, grain size, pollen analysis, and 8 data of 14C dating in the gray-black peat-bearing clayey silt layer, the climate in the south of the Junggar Basin is traced back to 4 900 a BP, and the relationship between lake-surface and,diatom or climate is also discussed. Totally 64 samples were sampled, most of the sampling space was 2 cm except 3~5 cm in silt layers. All the samples were analyzed by using routine analysis method and tested for the diatom concentration. The diatoms are relatively abundant in the samples, and 7 families and 12 genera of diatoms are identified. The results show that the climate was relatively stable in this area during the period from 4 900 a BP to 3 120 a BP, and there were three climatic fluctuation periods in this area since 3 120 a BP. During the three climatic fluctuation periods (i.e., the periods of3120aBP-2310aBP, 1700 aBP~l 310 aBP and 1270 aBP~305 aBP), the climate was relatively cold and humid, the concentration of diatoms in silica is relatively high. The Dongdaohaizi Lake was at it’s high water level in the cold periods. On the contrary, the periods of 2 310 a BP~-1700 a BP, 1310 a BP~ 1270 a BP and 305 a BP up to the present, the climate was relatively warm and arid, the concentration of diatom in silica is relatively low, mainly alkaliphilous species, the water level was comparatively declined in the warm periods.
中文关键词	湖泊 ; 古环境 ; 硅藻 ; 环境演变 ; 乌鲁木齐
英文关键词	paleoenvironment diatom environmental evolution Urumqi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1905187
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206132
作者单位	1.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 2.中国科学院植物研究所, 植被数量生态学重点实验室, 北京 100029, 中国
推荐引用方式 GB/T 7714	李树峰,阎顺,孔昭宸,等. 乌鲁木齐东道海子剖面的硅藻记录与环境演变[J]. 中国科学院新疆生态与地理研究所,2005,28(1):81-87.
APA	李树峰,阎顺,孔昭宸,&倪健.(2005).乌鲁木齐东道海子剖面的硅藻记录与环境演变.干旱区地理,28(1),81-87.
MLA	李树峰,et al."乌鲁木齐东道海子剖面的硅藻记录与环境演变".干旱区地理 28.1(2005):81-87.