Long-Chain Alkenones in Saline Meromictic Lakes of the North Minusinsk Depression (Southern Siberia): First Knowledge and Possible Correlation with Water-Level Dynamics

Long-Chain Alkenones in Saline Meromictic Lakes of the North Minusinsk Depression (Southern Siberia): First Knowledge and Possible Correlation with Water-Level Dynamics Full article

Journal

Contemporary Problems of Ecology
ISSN: 1995-4255

Output data

Year: 2020, Volume: 13, Number: 6, Pages: 643-655 Pages count : 13 DOI: 10.1134/S199542552006013X

Tags

long-chain alkenones; haptophyte algae; meromictic lakes; water level; climate; paleolimnological reconstruction; 18S rRNA gene; metagenomics

Authors

Rogozin D.Y. ^1,2 , Bulkhin A.O. ^1,2 , Zykov V.V. ¹ , Ivanova E.A. ¹ , Darin A. ³ , Kalugin I.A. ³ , Baturina O.A. ⁴ , Kabilov M.R. ⁴

Affiliations

1	(Данные Web of science) Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
2	(Данные Web of science) Siberian Fed Univ, Krasnoyarsk 660041, Russia
3	(Данные Web of science) Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia
4	(Данные Web of science) Russian Acad Sci, Inst Chem Biol & Fundamental Med, Siberian Branch, Novosibirsk 630090, Russia

Long-chain alkenones (LCAs)-lipides produced by some microalgae of the Haptophyta group in seas and continental water bodies-are promising paleomarkers of climate changes because they are well-preserved in bottom sediments. The hydrocarbon chain and the degree of unsaturation of double bonds of this class of lipides can vary depending on habitat conditions of their producers. For the first time, we have discovered LCAs in the bottom sediments of two saline meromictic lakes Shira and Uchum located in arid steppes of southern Siberia (the North Minusinsk Depression) and estimated the distribution of their total content, length, and the degree of unsaturation. The highly abundant population of producers of LCAs-haptophyte algae of the genus Isochrysis (Haptophyta)-is revealed in the water column of Lake Uchum. It is shown that the species composition of the haptophyte algae and composition of the LCAs in the lakes under study are similar to those in saline stratified lakes of North America (Saskatchewan, Canada) with a similar climate and salt composition. The abundance of the C37:4 alkenone in the bottom sediments in the last 100 years reflected the variations in lake salinity caused by the documented changes in the water level. In this way, it is shown that the LCAs may be used as a paleomarker of climate-driven changes in the water level of the saline lakes in southern Siberia.

Rogozin D.Y. , Bulkhin A.O. , Zykov V.V. , Ivanova E.A. , Darin A. , Kalugin I.A. , Baturina O.A. , Kabilov M.R.
Long-Chain Alkenones in Saline Meromictic Lakes of the North Minusinsk Depression (Southern Siberia): First Knowledge and Possible Correlation with Water-Level Dynamics
Contemporary Problems of Ecology. 2020. V.13. N6. P.643-655. DOI: 10.1134/S199542552006013X WOS Scopus РИНЦ OpenAlex

Web of science:	WOS:000601534600008
Scopus:	2-s2.0-85098010457
Elibrary:	45059160
OpenAlex:	W3115444532

DB	Citing
Web of science	3
Scopus	4
OpenAlex	3
Elibrary	5