Sterol identification in floating Arctic sea ice algal aggregates and the Antarctic sea ice diatom Berkeleya adeliensis
Sterol identification in floating Arctic sea ice algal aggregates and the Antarctic sea ice diatom Berkeleya adeliensis
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DOI：
10.1016/j.orggeochem.2018.01.008
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发表时间：
2018-04-01
影响因子：
3
通讯作者：
Mundy, C. J.
中科院分区：
文献类型：
--
作者：
Belt, Simon T.;Brown, Thomas A.;Mundy, C. J.
在北极和南极的海冰硅藻中发现了许多常见的甾醇。2012年在加拿大北极地区Resolute Passage和Nansen Basin （North Svalbard）采集的浮冰藻聚集体中主要的甾醇是22e -脱氢胆固醇、胆固醇、表油菜甾醇、24-亚甲基胆固醇和24-乙基胆固醇，尽管两个地点之间的分布有所不同，可能反映了硅藻分类群的成分差异。2014年，从南极半岛莱德湾（Ryder Bay）收集的融化海冰核中提取的阿德利伯克利虫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。我们认为，某些海冰硅藻可能因此有助于在海冰融化后季节性海冰覆盖地区的普通甾醇沉积收支。(C) 2018 Elsevier Ltd.版权所有。
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. (C) 2018 Elsevier Ltd. All rights reserved.