干旱区生态环境知识资源中心(Arid): Long-Chain Alkenones in Sediments of Lake Utichye-3 (Southern Siberia, Khakassia) as a Paleo-Indicator of Climate Change

Arid

DOI	10.1134/S1995425524700185
	Long-Chain Alkenones in Sediments of Lake Utichye-3 (Southern Siberia, Khakassia) as a Paleo-Indicator of Climate Change
	Bulkhin, A. O.; Zykov, V. V.; Marchenko, D. N.; Kalugin, I. A.; Rogozin, D. Y.
通讯作者	Rogozin, DY
来源期刊	CONTEMPORARY PROBLEMS OF ECOLOGY
ISSN	1995-4255
EISSN	1995-4263
出版年	2024
卷号	17 期号:3 页码:412-423
英文摘要	Long-chain alkenones are produced exclusively by certain species of microalgae Isochrysidales of the order of haptophytes (Haptophyta). These are polyunsaturated methyl and ethyl ketones C35-C42 with 2-4 trans double bonds in the aliphatic chain. The length of the hydrocarbon chain and the degree of unsaturation of double bonds of a given class of lipids can vary depending on the environmental conditions of their producers. This class of substances is well preserved in the bottom sediments (BSs) of seas and lakes and therefore can serve as a paleoindicator of climate change. Currently, studies are being conducted to identify the functional dependences of the composition of long-chain alkenones on the temperature and salinity of water in continental water bodies. In arid regions, saline closed-basin lakes sensitively react by changing the volume of water and its salinity to variations in the precipitation-evaporation balance, and, consequently, the sediments of such lakes are sources of information about climate humidity variations in the past. In this work, we analyzed the vertical profile of long-chain alkenones in the upper part of the BSs of the Utichye-3 salt lake located in the steppe region of southern Siberia and compared it with changes in the surface level and salinity of the lake water recorded over a period of about 100 years. It has been shown that the content of long-chain alkenones in sediments can increase during periods of high salinity. Consequently, the composition of alkenones can be used to reconstruct changes in salinity from BSs of closed-basin lakes, and, therefore, to reconstruct dry periods in the history of the climate of the steppe zone of southern Siberia.
英文关键词	long-chain alkenones haptophyte algae salinity lake bottom sediment climate humidity southern Siberia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001239390600004
WOS关键词	TEMPERATURE SENSITIVITY ; UNSATURATED ALKENONE ; LACUSTRINE ; HAPTOPHYTE ; SALINITY ; DISTRIBUTIONS ; CALIBRATION ; INDEX ; SEA ; HYPERSALINE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403267
推荐引用方式 GB/T 7714	Bulkhin, A. O.,Zykov, V. V.,Marchenko, D. N.,et al. Long-Chain Alkenones in Sediments of Lake Utichye-3 (Southern Siberia, Khakassia) as a Paleo-Indicator of Climate Change[J],2024,17(3):412-423.
APA	Bulkhin, A. O.,Zykov, V. V.,Marchenko, D. N.,Kalugin, I. A.,&Rogozin, D. Y..(2024).Long-Chain Alkenones in Sediments of Lake Utichye-3 (Southern Siberia, Khakassia) as a Paleo-Indicator of Climate Change.CONTEMPORARY PROBLEMS OF ECOLOGY,17(3),412-423.
MLA	Bulkhin, A. O.,et al."Long-Chain Alkenones in Sediments of Lake Utichye-3 (Southern Siberia, Khakassia) as a Paleo-Indicator of Climate Change".CONTEMPORARY PROBLEMS OF ECOLOGY 17.3(2024):412-423.