Abstract 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.

中文翻译：

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底部沉积物中的奥酮酮作为盐层湖水位变化的代表

摘要 长期测量表明，okenone（紫硫细菌的一种类胡萝卜素）的沉积动力学反映了封闭盐分分生希拉湖（俄罗斯西伯利亚南部）中紫硫细菌的丰度、硫化氢含量和分层稳定性。 . 底部沉积物中化石奥酮的剖面已与过去 100 年来湖中水面水平的数据进行了比较。酮酮的峰值对应于湖侵，酮酮含量的下降与水位稳定或下降的时期相吻合。我们的观察表明，化石奥酮可用作分体条件的定性代表和封闭分层湖泊中水位动态的定量代表。所以，