期刊
ORGANIC GEOCHEMISTRY
卷 108, 期 -, 页码 43-50出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.orggeochem.2017.03.011
关键词
Canadian Arctic; Surface sediments; Autoxidation; Vascular plants; Lipid tracers; Angiosperms; Gymnosperms
资金
- French Government Investissements d'Avenir program of the French National Research Agency (ANR) through the A* MIDEX [ANR-11-LABX-0061, ANR-11-IDEX-0001-02]
- LEFE-CYBER (Les Enveloppes Fluides et l'Environnement) national program, as part of the MORTIMER (Matiere ORganique Terrestre rejetee par les fleuves et les rIvieres en MER) research program
- FEDER OCEANOMED
Autoxidation products of specific lipid components of angiosperms (betulin, alpha- and beta-amyrin) and gymnosperms (dehydroabietic acid) and their parent compound in surface sediments from different regions of the Canadian Arctic were quantified. The high proportions of these autoxidation products in all the sediments (mean 60.1 +/- 14.0%, 91.8 +/- 1.1, 98.7 +/- 2.2 and 96.6 +/- 5.4% for dehydroabietic acid, betulin and alpha- and beta-amyrin, respectively) confirmed, unambiguously, the important role played by autoxidation in the degradation of vascular plant material in the region and its enhancement in seawater. The enhancement of these processes in Arctic waters could be the result of intense photooxidation during the senescence of the organisms within the terrestrial environment. (C) 2017 Elsevier Ltd. All rights reserved.
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