Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.1134/S199542552006013X

Ключевые слова: 18s rrna gene, climate, haptophyte algae, long-chain alkenones, meromictic lakes, metagenomics, paleolimnological reconstruction, water level

Аннотация: Abstract: 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 С37:4 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. © 2020, Pleiades Publishing, Ltd.

Журнал: Contemporary Problems of Ecology

Выпуск журнала: Vol. 13, Is. 6

Номера страниц: 643-655

ISSN журнала: 19954255

Издатель: Pleiades journals

• Rogozin D.Y. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
• Bulkhin A.O. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Krasnoyarsk 660041, Russia)
• Zykov V.V. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia)
• Ivanova E.A. (Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia)
• Darin A.V (Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia)
• Kalugin I.A. (Russian Acad Sci, Sobolev Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia)
• Baturina O.A. (Russian Acad Sci, Inst Chem Biol & Fundamental Med, Siberian Branch, Novosibirsk 630090, Russia)
• Kabilov M.R. (Russian Acad Sci, Inst Chem Biol & Fundamental Med, Siberian Branch, Novosibirsk 630090, Russia)

• Scopus
• Web of Science Core Collection