Okenone in Bottom Sediments as a Proxy for Changes in the Water Level of a Saline Stratified Lake

Autor:	Denis Yu. Rogozin, A. G. Degermendzhi, V. V. Zykov, A. O. Bulkhin
Rok vydání:	2020
Předmět:	010504 meteorology & atmospheric sciences biology Stratification (water) Humidity 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Surface level Arid Water level Water balance Oceanography Purple sulfur bacteria Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Geology 0105 earth and related environmental sciences
Zdroj:	Doklady Earth Sciences. 493:565-568
ISSN:	1531-8354 1028-334X
Popis:	Long-term measurements show that the sedimentation dynamics of okenone (a carotenoid of purple sulfur bacteria) reflects the abundance of purple sulfur bacteria, the hydrogen sulfide content, and the stratification stability in the closed saline meromictic Shira Lake (Southern Siberia, Russia). The profile of fossil okenone in bottom sediments has been compared with the data on the water surface level in the lake over the last 100 years. The peaks of okenone correspond to lake transgressions, and the drops in the okenone content coincide with periods of stable or decreasing water level. Our observations show that fossil okenone may be used as a qualitative proxy of meromictic conditions and as a quantitative proxy of the water level dynamics in closed stratified lakes. Therefore, okenone can be used for qualitative reconstructions of the water balance and climate humidity in arid zones.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7144d26e6fdf954f55bc9fb81fb5e6c https://doi.org/10.1134/s1028334x20070168 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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