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High lipid composition of particulate organic matter in the northern Chukchi Sea, 2011

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Title
High lipid composition of particulate organic matter in the northern Chukchi Sea, 2011
Authors
Kim, Bo Kyung
Lee, Sang Heon
Kang, Sung-Ho
Chung, Kyung Ho
Yang, Eun Jin
Song, Ho Jung
Joo, HuiTae
Yun, Mi Sun
Lee, Jang Han
Keywords
Arctic Ocean; Biochemical compositions; Food material; Particulateorganicmatter
Issue Date
2015
Citation
Kim, Bo Kyung, et al. 2015. "High lipid composition of particulate organic matter in the northern Chukchi Sea, 2011". DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 120(1): 72-81.
Abstract
Weinvestigatedthebiochemicalcompositions(lipids,proteins,andcarbohydrates)ofparticulate organic matter(POM)asapotentialfoodsourceinthenorthernChukchiSea.Weaimedtounderstand physiologicalstatusofphytoplankton,determineimportantcontrollingfactors,andestimate the energeticcontentsofPOM.Themajorinorganicnutrientsweregenerallydepletedatupper mixed-layerdepth(420 m).Theaveragechlorophylla(chl-a) concentrationwas31.9mgm 2 (S.D.¼731.3mgm 2) inthisstudy,significantly higherthanthatreportedpreviouslyinthenorthern Chukchi Sea.Smallphytoplankton(0.7?5 mm) accountedfor65.9%oftotalchl-a concentration. The overallaveragecompositionsoflipids,carbohydrates,andproteinswere50%(S.D.¼710.7%),35% (S.D.¼711.0%),and15%(S.D.¼711.2%)forPOM,respectively.Alongwithotherevidence(e.g.,lowN:P and protein?carbohydrateratios),thehighlipidandlowproteincompositionsofPOMinthisstudy suggests thatphytoplanktonmighthavehadanitrogenlimitationand/orstationarygrowthphaseinthe northern ChukchiSeaduringthecruiseperiod,2011.Theoverallaveragecalorific contentoffood material (FM)was149.2 μg L 1 (S.D.¼736.5 μg L 1) or1.0Kcalm 3 (S.D.¼70.2 Kcalm 3). The relativelyhighercalorific contentsinthenorthernChukchiSeawereduetohighlipidcontributions and theconsiderablyhighcalorific contentofFMperPOC.
URI
http://repository.kopri.re.kr/handle/201206/7383
DOI
http://dx.doi.org/10.1016/j.dsr2.2014.03.022
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