| 基于稳定性同位素的普里兹湾南极大磷虾不同发育阶段食性转变分析 |
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| 引用本文： | 张晔,李超伦,杨光,王延清,陶振铖,张永山,王爱军.基于稳定性同位素的普里兹湾南极大磷虾不同发育阶段食性转变分析[J].海洋学报(英文版),2017,36(12):67-78. |
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| 作者姓名： | 张晔 李超伦 杨光 王延清 陶振铖 张永山 王爱军 |
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| 作者单位： | 中国科学院海洋研究所, 海洋生态与环境科学重点实验室;中国科学院大学;海洋国家实验室海洋生态与环境科学功能实验室,中国科学院海洋研究所, 海洋生态与环境科学重点实验室;中国科学院大学;海洋国家实验室海洋生态与环境科学功能实验室,中国科学院海洋研究所, 海洋生态与环境科学重点实验室;海洋国家实验室海洋生态与环境科学功能实验室,中国科学院海洋研究所, 海洋生态与环境科学重点实验室;海洋国家实验室海洋生态与环境科学功能实验室,中国科学院海洋研究所, 海洋生态与环境科学重点实验室;海洋国家实验室海洋生态与环境科学功能实验室,中国科学院海洋研究所, 海洋生态与环境科学重点实验室;海洋国家实验室海洋生态与环境科学功能实验室,国家海洋局第三研究所 |
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| 基金项目： | Chinese Polar Environment Comprehensive Investigation & Assessment Programmes under contract No. CHINARE2016-01-05; the Scientific and Technological Innovation Project financially supported by Qingdao National Laboratory for Marine Science and Technology under contract No. 2015ASKJ01; the National Natural Science Foundation of China under contract No. 41206180. |
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| 摘 要： | As one of the most common and dominant species in the Southern Ocean, Antarctic krill(Euphausia superba)play a significant role in food web structure and the process of energy flow. The diet of Antarctic krill in the Prydz Bay during austral summer of 2012/2013 was investigated and the ontogenetic shift in krill diet was evaluated using the stable isotope method. The nitrogen stable isotope values(δ~(15) N) of adults((2.78±0.58)‰) were much higher than those of juveniles((1.69±0.70)‰), whereas the carbon stable isotope values(δ~(13) C) of adults(–(28.26±1.08)‰) were slightly lower than those of juveniles(–(27.48±1.35)‰). Particulate organic matter(POM)from 0, 25, and 50 m depth combined(0/25/50 m) represented phytoplankton food items. The results showed that phytoplankton food items in surface water and mesozooplankton were two essential food items for Antarctic krill in the Prydz Bay during summer. POM(0/25/50 m) contributes 56%–69% and 26%–34% to the diet of juvenile and adult krill, respectively, whereas mesozooplankton composes 13%–34% and 58%–71% of the diet of juvenile and adult krill, respectively. Thus, an ontogenetic diet shift from POM(0/25/50 m), which consists mainly of phytoplankton, to a higher trophic level diet containing mesozooplankton, was detected. The capacity for adults to consume more zooplankton food items may minimize their food competition with juveniles, which rely mostly on phytoplankton food items. This suggests "diet shift with ontogeny" which may somehow help krill keep their dietary energy budget balanced and well adapted to the Antarctic marine ecosystem as a dominant species.
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| 关 键 词： | 南极大磷虾 普里兹湾 食性转变 稳定性同位素 Isosource |
| 收稿时间： | 2016/1/20 0:00:00 |
Ontogenetic diet shift in Antarctic krill (Euphausia superba) in the Prydz Bay: a stable isotope analysis |
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| ZHANG Ye,LI Chaolun,YANG Guang,WANG Yanqing,TAO Zhencheng,ZHANG Yongshan and WANG Aijun.Ontogenetic diet shift in Antarctic krill (Euphausia superba) in the Prydz Bay: a stable isotope analysis[J].Acta Oceanologica Sinica,2017,36(12):67-78. |
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| Authors: | ZHANG Ye LI Chaolun YANG Guang WANG Yanqing TAO Zhencheng ZHANG Yongshan and WANG Aijun |
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| Institution: | Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China;Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China,Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100049, China;Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, 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, Qingdao National Laboratory for Marine Science and Technology, 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, Qingdao National Laboratory for Marine Science and Technology, 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, Qingdao National Laboratory for Marine Science and Technology, 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, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China and Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China |
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| Abstract: | As one of the most common and dominant species in the Southern Ocean, Antarctic krill (Euphausia superba) play a significant role in food web structure and the process of energy flow. The diet of Antarctic krill in the Prydz Bay during austral summer of 2012/2013 was investigated and the ontogenetic shift in krill diet was evaluated using the stable isotope method. The nitrogen stable isotope values (δ15N) of adults ((2.78±0.58)‰) were much higher than those of juveniles ((1.69±0.70)‰), whereas the carbon stable isotope values (δ13C) of adults (–(28.26±1.08)‰) were slightly lower than those of juveniles (–(27.48±1.35)‰). Particulate organic matter (POM) from 0, 25, and 50 m depth combined (0/25/50 m) represented phytoplankton food items. The results showed that phytoplankton food items in surface water and mesozooplankton were two essential food items for Antarctic krill in the Prydz Bay during summer. POM (0/25/50 m) contributes 56%–69% and 26%–34% to the diet of juvenile and adult krill, respectively, whereas mesozooplankton composes 13%–34% and 58%–71% of the diet of juvenile and adult krill, respectively. Thus, an ontogenetic diet shift from POM (0/25/50 m), which consists mainly of phytoplankton, to a higher trophic level diet containing mesozooplankton, was detected. The capacity for adults to consume more zooplankton food items may minimize their food competition with juveniles, which rely mostly on phytoplankton food items. This suggests “diet shift with ontogeny” which may somehow help krill keep their dietary energy budget balanced and well adapted to the Antarctic marine ecosystem as a dominant species. |
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| Keywords: | Antarctic krill Prydz Bay diet shift stable isotope IsoSource |
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