DOI: 10.1002/2017JC013457
Scopus记录号: 2-s2.0-85042418192
论文题名: Vertical Distributions of Macromolecular Composition of Particulate Organic Matter in the Water Column of the Amundsen Sea Polynya During the Summer in 2014
作者: Kim B.K. ; Lee S. ; Ha S.-Y. ; Jung J. ; Kim T.W. ; Yang E.J. ; Jo N. ; Lim Y.J. ; Park J. ; Lee S.H.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1393
结束页码: 1405
语种: 英语
英文关键词: Amundsen Sea
; food material
; macromolecular compositions
; particulate organic matter
; polynya
; Southern Ocean
Scopus关键词: carbohydrate
; lipid
; molecular analysis
; particulate organic matter
; photic zone
; polynya
; primary production
; protein
; summer
; vertical distribution
; water column
; Amundsen Sea
; Ross Sea
; Southern Ocean
; Southern Ocean
; Phaeocystis antarctica
英文摘要: Macromolecular compositions (carbohydrates, proteins, and lipids) of particulate organic matter (POM) are crucial as a basic marine food quality. To date, however, one investigation has been carried out in the Amundsen Sea. Water samples for macromolecular compositions were obtained at selected seven stations in the Amundsen Sea Polynya (AP) during the austral summer in 2014 to investigate vertical characteristics of POM. We found that a high proportion of carbohydrates (45.9 ± 11.4%) in photic layer which are significantly different from the previous result (27.9 ± 6.9%) in the AP, 2012. The plausible reason could be the carbohydrate content strongly associated with biomass of the dominant species (Phaeocystis antarctica). The calorific content of food material (FM) in the photic layer obtained in this study is similar with that of the Ross Sea as one of the highest primary productivity regions in the Southern Ocean. Total concentrations, calorific values, and calorific contents of FM were higher in the photic layer than the aphotic layer, which implies that a significant fraction of organic matter underwent degradation. A decreasing proteins/carbohydrates (PRT/CHO) ratio with depth could be caused by preferential nitrogen loss during sinking period. Since the biochemical compositions of POM mostly fixed in photic layers could play an important role in transporting organic carbon into the deep sea, further detail studies on the variations in biochemical compositions and main controlling factors are needed to understand sinking mechanisms of POM. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114564
Appears in Collections: 气候减缓与适应
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作者单位: Division of Polar Ocean Sciences, Korea Polar Research Institute, Yeonsu-gu, Incheon, South Korea; Department of Oceanography, Pusan National University, Geumjeong-gu, Busan, South Korea
Recommended Citation:
Kim B.K.,Lee S.,Ha S.-Y.,et al. Vertical Distributions of Macromolecular Composition of Particulate Organic Matter in the Water Column of the Amundsen Sea Polynya During the Summer in 2014[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)