| 南极夏季南设德兰群岛东部海域南极大磷虾的摄食策略 |
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| 引用本文： | 刘梦坛,陶振铖,张晔,杨光,孙松,李超伦,乐凤凤. 南极夏季南设德兰群岛东部海域南极大磷虾的摄食策略[J]. 海洋学报(英文版), 2019, 38(10): 75-83. DOI: 10.1007/s13131-019-1392-8 |
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| 作者姓名： | 刘梦坛 陶振铖 张晔 杨光 孙松 李超伦 乐凤凤 |
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| 作者单位： | 中国科学院海洋研究所 山东胶州湾海洋生态系统国家野外科学观测研究站 青岛 266071;青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266071;中国科学院海洋大科学研究中心 青岛 266071,青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266071;中国科学院海洋大科学研究中心 青岛 266071;中国科学院海洋研究所 海洋生态与环境科学重点实验室 青岛 266071,中国科学院海洋研究所 海洋生态与环境科学重点实验室 青岛 266071;自然资源部东海环境监测中心 上海 200137,青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266071;中国科学院海洋大科学研究中心 青岛 266071;中国科学院海洋研究所 海洋生态与环境科学重点实验室 青岛 266071,青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266071;中国科学院海洋大科学研究中心 青岛 266071;中国科学院海洋研究所 海洋生态与环境科学重点实验室 青岛 266071,青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266071;中国科学院海洋大科学研究中心 青岛 266071;中国科学院海洋研究所 海洋生态与环境科学重点实验室 青岛 266071,自然资源部第二海洋研究所 海洋生态系统与生物地球化学实验室 杭州 310012 |
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| 基金项目： | The National Natural Science Foundation of China under contract No. 41406159; the Science & Technology Basic Resources Investigation Program of China under contract No. 2017FY100803; the Chinese Polar Environment Comprehensive Investigation & Assessment Programmes under contract No. CHINARE2016-01-05; the Scientific and Technological Innovation Project by Qingdao National Laboratory for Marine Science and Technology under contract No. 2015ASKJ02. |
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| 摘 要： | 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 μm particles, demonstrating the importance of nanoplankton in their diet. Moreover, significant positive relationships between δ15 N and body size demonstrated that size-related dietary shifts were present in E. superba. Evidence from principal component analysis and the C16:1ω7/C18:4ω3 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 C16:1ω7, C18:4ω3, C18:1ω9 and C18:1ω9/C18:1ω7, 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 C16:1ω7,C18:1ω7, C18:4ω3, C18:1ω9 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.
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| 关 键 词： | 南极大磷虾|南设德兰群岛|脂肪酸|同位素 |
| 收稿时间： | 2018-08-06 |
Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer |
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| Liu Mengtan,Tao Zhencheng,Zhang Ye,Yang Guang,Sun Song,Li Chaolun and Le Fengfeng. Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer[J]. Acta Oceanologica Sinica, 2019, 38(10): 75-83. DOI: 10.1007/s13131-019-1392-8 |
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| Authors: | Liu Mengtan Tao Zhencheng Zhang Ye Yang Guang Sun Song Li Chaolun Le Fengfeng |
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| Affiliation: | Jiaozhou Bay National Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China,Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China,Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;East Sea Marine Environmental Investigating and Surveying Center, Ministry of Natural Resources, Shanghai 200137, China,Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China,Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China,Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China and Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China |
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| 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 μm particles, demonstrating the importance of nanoplankton in their diet. Moreover, significant positive relationships between δ15N and body size demonstrated that size-related dietary shifts were present in E. superba. Evidence from principal component analysis and the C16:1ω7/C18:4ω3 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 C16:1ω7, C18:4ω3, C18:1ω9 and C18:1ω9/C18:1ω7, 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 C16:1ω7, C18:1ω7, C18:4ω3, C18:1ω9 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. |
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| Keywords: | Euphausia superba|South Shetland Islands|fatty acids|stable isotopes |
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