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Feeding strategies of four dominant copepod species in Prydz Bay, Antarctica: Insights from a combined fatty acid biomarker and stable isotopic approach
Yang, Guang1; Li, Chaolun1,2,3; Guilini, Katja4; Peng, Quancai5; Wang, Yanqing1; Zhang, Ye1,2; Zhang, Yongshan1
2016-08-01
发表期刊DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
卷号114页码:55-63
文章类型Article
摘要Using fatty acid biomarkers and stable isotopic signatures, we investigated the feeding strategies and dietary preferences of four dominant copepod species (Calanoides acutus, Calanus propinquus, Metridia gerlachei and Rhincalanus gigas) sampled during the late austral summer in Prydz Bay, Antarctica. Our results show that diatoms, dinoflagellates and ciliates dominated copepod food sources (hypothesized to be phytoplanlcton and particulate organic matter) in the inner bay regions more than in the oceanic regions of Prydz Bay. Regional differences in the composition and abundance of food sources were also reflected in the fatty acid biomarkers and stable isotopic values. In the inner bay region, the total fatty acid contents of these food sources were nearly twofold higher, including greater contributions from fatty acids of dinoflagellate origin; these samples also had higher delta C-13 and delta N-15 values. Fatty acid biomarkers and stable isotopic values in copepod species roughly mirrored the spatial patterns in food sources. As found in the primary producers, the concentrations of dinoflagellate fatty acids and delta C-13 and delta N-15 values were higher in copepods from the inner bay regions. Additionally, there were inter-species differences in the fatty acids and stable isotopic values of copepods. C acutus and C propinquus did not exhibit significant regional differences in their total fatty acid contents. In contrast, M. gerlachei from the inner bay region had higher fatty acid values. C. acutus and C propinquus had higher compositions of the long chain fatty acids 20:1n-9, 22:1n-9 and 22:1n-1, while docosahexaenoic acid (DHA) was higher in M. gerlachei. The delta N-15 values indicate that C acutus occupies a higher trophic level than the other copepod species. Similarly, higher fatty acid ratios in M. gerlachei, including DHA/EPA(eicosapntemacnioc acid) and 18:1n-9/18:1n-7, indicate that this species feeds more opportunistically and prefers a carnivorous diet. Insights from this combined fatty acid and stable isotopic approach suggest that the dominant copepod species in Prydz Bay, Antarctica, have flexible feeding strategies that vary by food source during the late austral summer. (C) 2016 Elsevier Ltd. All rights reserved.
关键词Feeding Strategy Copepods Fatty Acids Stable Isotopes Prydz Bay Southern Ocean
DOI10.1016/j.dsr.2016.04.016
收录类别SCI
语种英语
WOS记录号WOS:000381531500005
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/135886
专题海洋生态与环境科学重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
4.Univ Ghent, Dept Biol, Marine Biol Res Grp, Kritslaan 281-S8, B-9000 Ghent, Belgium
5.Chinese Acad Sci, Inst Oceanol, Res Ctr Anal & Measurement, 7 Nanhai Rd, Qingdao 266071, Peoples R China
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Yang, Guang,Li, Chaolun,Guilini, Katja,et al. Feeding strategies of four dominant copepod species in Prydz Bay, Antarctica: Insights from a combined fatty acid biomarker and stable isotopic approach[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2016,114:55-63.
APA Yang, Guang.,Li, Chaolun.,Guilini, Katja.,Peng, Quancai.,Wang, Yanqing.,...&Zhang, Yongshan.(2016).Feeding strategies of four dominant copepod species in Prydz Bay, Antarctica: Insights from a combined fatty acid biomarker and stable isotopic approach.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,114,55-63.
MLA Yang, Guang,et al."Feeding strategies of four dominant copepod species in Prydz Bay, Antarctica: Insights from a combined fatty acid biomarker and stable isotopic approach".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 114(2016):55-63.
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