| 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
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| 2019-10-01 | |
| Source Publication | ACTA OCEANOLOGICA SINICA
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| ISSN | 0253-505X |
| Volume | 38Issue:10Pages:75-83 |
| Corresponding Author | Tao, Zhencheng(taozc@qdio.ac.cn) ; Li, Chaolun(lcl@qdio.ac.cn) |
| Abstract | Euphausia 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. |
| Keyword | Euphausia superba South Shetland Islands fatty acids stable isotopes |
| DOI | 10.1007/s13131-019-1392-8 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Oceanography |
| WOS Subject | Oceanography |
| WOS ID | WOS:000490598500009 |
| Publisher | SPRINGER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Tao, Zhencheng; Li, Chaolun |
| Affiliation | 1.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 Affilication | Institute of Oceanology, Chinese Academy of Sciences |
| Corresponding Author Affilication | Institute 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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