IOCAS-IR  > 胶州湾海洋生态系统国家野外研究站
Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer
Liu, Mengtan1,2,3; Tao, Zhencheng2,3,4; Zhang, Ye4,5; Yang, Guang2,3,4; Sun, Song2,3,4; Li, Chaolun2,3,4; Le, Fengfeng6
2019-10-01
Source PublicationACTA OCEANOLOGICA SINICA
ISSN0253-505X
Volume38Issue:10Pages:75-83
Corresponding AuthorTao, Zhencheng(taozc@qdio.ac.cn) ; Li, Chaolun(lcl@qdio.ac.cn)
AbstractEuphausia superba is a key species in the Southern Ocean that serves as a link between primary production and higher trophic levels. To investigate the feeding strategies of E. superba from the eastern South Shetland Islands, fatty acid biomarkers, stable isotope signatures, and an incubation experiment were conducted. The results of the incubation experiment proved that adult E. superba mainly fed on 2-20 mu m particles, demonstrating the importance of nanoplankton in their diet. Moreover, significant positive relationships between delta N-15 and body size demonstrated that size-related dietary shifts were present in E. superba. Evidence from principal component analysis and the C16:1 omega 7/C18:4 omega 3 ratio showed that juveniles preferentially fed on dinoflagellates and adults were more likely to feed on diatoms. Fatty acid profiles in adult E. superba roughly mirrored the different trophic conditions and feeding strategies between stations. Adult E. superba at Stas D2-07, D5-07, DA-01 and DA-02 exhibited elevated levels of C16:1 omega 7, C18:4 omega 3, C18:1 omega 9 and C18:1 omega 9/C18:1 omega 7, indicating higher levels of feeding on both phytoplankton and higher trophic diets. In contrast, adult E. superba at Stas D1-03 and D1-04 were characterized by high levels of polyunsaturated fatty acids/saturated fatty acids ratios and low levels of C16:1 omega 7, C18:1 omega 7, C18:4 omega 3, C18:1 omega 9 and total fatty acids. We inferred that adult krill at Stas D1-03 and D1-04 still suffered from difficult dietary conditions after overwintering. The different dietary conditions between stations suggest a highly plastic feeding strategy of E. superba in the eastern South Shetland Islands.
KeywordEuphausia superba South Shetland Islands fatty acids stable isotopes
DOI10.1007/s13131-019-1392-8
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41406159] ; Science & Technology Basic Resources Investigation Program of China[2017FY100803] ; Chinese Polar Environment Comprehensive Investigation & Assessment Programmes[CHINARE2016-01-05] ; Scientific and Technological Innovation Project by Qingdao National Laboratory for Marine Science and Technology[2015ASKJ02]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000490598500009
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/163393
Collection胶州湾海洋生态系统国家野外研究站
海洋生态与环境科学重点实验室
Corresponding AuthorTao, Zhencheng; Li, Chaolun
Affiliation1.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, Qingdao 266071, Shandong, Peoples R China
2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao 266237, Shandong, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Shandong, Peoples R China
5.Minist Nat Resources, East Sea Marine Environm Invest & Surveying Ctr, Shanghai 200137, Peoples R China
6.Minist Nat Resources, Lab Marine Ecosyst & Biogeochem, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Mengtan,Tao, Zhencheng,Zhang, Ye,et al. Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer[J]. ACTA OCEANOLOGICA SINICA,2019,38(10):75-83.
APA Liu, Mengtan.,Tao, Zhencheng.,Zhang, Ye.,Yang, Guang.,Sun, Song.,...&Le, Fengfeng.(2019).Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer.ACTA OCEANOLOGICA SINICA,38(10),75-83.
MLA Liu, Mengtan,et al."Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer".ACTA OCEANOLOGICA SINICA 38.10(2019):75-83.
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