Sterol identification in floating Arctic sea ice algal aggregates and the Antarctic sea ice diatom Berkeleya adeliensis

被引：24
作者：
Belt, Simon T. [1 ]
Brown, Thomas A. [1 ,2 ]
Smik, Lukas [1 ]
Assmy, Philipp [3 ]
Mundy, C. J. [4 ]
机构：
[1] Univ Plymouth, Sch Geog Earth & Environm Sci, Biogeochem Res Ctr, Plymouth PL4 8AA, Devon, England
[2] Scottish Assoc Marine Sci, Marine Ecol & Chem, Oban PA37, Argyll, Scotland
[3] Fram Ctr, Norwegian Polar Inst, NO-9296 Tromso, Norway
[4] Univ Manitoba, CEOS, Winnipeg, MB R3T 2N2, Canada
来源：
ORGANIC GEOCHEMISTRY | 2018年 / 118卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Sterols; Sea ice; Biomarker; Arctic; Antarctic; SPRING BLOOM; COMMUNITIES; MARINE;
D O I：
10.1016/j.orggeochem.2018.01.008
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
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.
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页码：1 / 3
页数：3
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