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Volume 32 Issue 2
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Article Navigation >  Haiyang Xuebao  > 2010  >  32(2): 106-117
BAI You-cheng, CHEN Jian-fang, LI Hong-liang, XING Lei, JIN Hai-yan, ZHAO Mei-xun. The distribution of lipids biomarkers in the surface sediments of the Chukchi Sea and their implications[J]. Haiyang Xuebao, 2010, 32(2): 106-117.
Citation: BAI You-cheng, CHEN Jian-fang, LI Hong-liang, XING Lei, JIN Hai-yan, ZHAO Mei-xun. The distribution of lipids biomarkers in the surface sediments of the Chukchi Sea and their implications[J]. Haiyang Xuebao, 2010, 32(2): 106-117.
shu

The distribution of lipids biomarkers in the surface sediments of the Chukchi Sea and their implications

  • 1.

    Laboratory of State Oceanic Adminstration for Marine Ecosystem and Biogeochemistry,Second Institute of Oceanogranhy, State Oceanic Administration,Hangzhou 310012 , China

  • 2.

    Laboratory of State Oceanic Adminstration for Marine Ecosystem and Biogeochemistry,Second Institute of Oceanogranhy, State Oceanic Administration,Hangzhou 310012 , China;Second Institute of Oceanography,State Oceanic Administration , Hangzhou 310012 , Chi

  • 3.

    College of Chemistry and Chemical Engineering,Ocean University of China, Qingdao 266100,China

  • Received Date: 2009-04-29
  • Rev Recd Date: 2009-11-16
    Abstract
  • Multi-biomarkers have been applied for the reconstruction of phytoplankton productivity and community structure. This study reports phytoplankton biomarker ratios in surface sediments sampled during the second China arctic expedition from the western Chukchi Sea in the summer of 2003 and evaluates their potential as community structure proxies. The total biomarkers(sum of brassicasterol, dinosterol, alkenones) in the surveyed area were 20~3 149 ng/g, the average value was 1 010 ng/g.The distributions of biomarkers also indicate the primary productivity in the Chukchi shelf was higher than the Chukchi plateau. The brassicasterol to dinosterol ratios for different stations have an obvious diversification, but all stations show the brassicasterol is in the ascendant. At the station of the Chukchi shelf, diatom is the mainly phytoplankton, the brassicasterol accounts for 42% to 74% of the total biomarkers, and the proportion of dinosterol is 17% to 37% in the total biomarkers. On the plateau, the dominant phytoplankton is also diatom, but the ratio of dinosterol and coccolithophore has a significantly.In the Canada Basin, dinosterol and coccolithophore are the dominant phytoplankton,diatom is not the predminant population and this result is in accord with phytoplankton distribution patterns obtained by other methods such as microscope.An important modern basis that these biomarkers can be used as proxies for community structure is prcvided, and it also suggests that this method can be used for community structure reconstruction for the sediment cores.
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