Stenols and phytol in lake sediments from Syowa and Vestfold Oases in the Antarctic

Phytol and stenols were studied for lake sediments from Syowa and Vestfold Oases in the Antarctic. Phytol and 6 stenols (cholesta-5, 22-dien-3β-ol, cholest-5-en-3β-ol, 24-methylcholesta-5, 22-dien-3β-ol, 24-methylcholest-5-en-3β-ol, 24-ethylcholesta-5, 22-dien-3β-ol and 24-ethylcholest-5-en-3β-ol) were found, with concentrations ranging from 0.099 to 38 and 0.079 to 9.0μg g-1 dry sediment, respectively. The dominant stenols are cholest-5-en-3β-ol, 24-methylcholest-5-en-3β-ol and 24-ethylcholest-5-en-3β-ol. These compounds must be derived mainly from green and blue-green algae, diatoms and mosses. The relative abundances of these stenols should reflect the difference of source organisms in the lakes and the surroundings.

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