Abstract A number of common sterols were identified in sea ice diatoms from the Arctic and the Antarctic. The main sterols in floating sea ice algal aggregates collected from Resolute Passage (Canadian Arctic) and Nansen Basin (North Svalbard) in 2012 were 22E-dehydrocholesterol, cholesterol, epi-brassicasterol, 24-methylenecholesterol and 24-ethylcholesterol, although the distribution varied between the two locations, likely reflecting compositional differences in diatom taxa. The three major sterols in cells of Berkeleya adeliensis picked from a melted sea ice core collected from Ryder Bay in the Antarctic Peninsula in 2014, were 24-ethylcholesterol, cholesterol and 22E-dehydrocholesterol. We suggest that certain sea ice diatoms may thus contribute to the sedimentary budget of common sterols in seasonally sea ice-covered locations following ice melt.

中文翻译：

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漂浮的北极海冰藻类聚集体和南极海冰硅藻 Berkeleya adeliensis 中的甾醇鉴定

摘要 在来自北极和南极的海冰硅藻中鉴定出多种常见甾醇。2012 年从 Resolute Passage（加拿大北极）和 Nansen 盆地（北斯瓦尔巴群岛）收集的漂浮海冰藻聚集体中的主要甾醇是 22E-脱氢胆固醇、胆固醇、表皮油菜甾醇、24-亚甲基胆固醇和 24-乙基胆固醇，尽管分布不同这两个位置，可能反映了硅藻类群的组成差异。Berkeleya adeliensis 细胞中的三种主要甾醇是 24-乙基胆固醇、胆固醇和 22E-脱氢胆固醇，它们是从 2014 年从南极半岛莱德湾采集的融化海冰芯中提取的。