Inferring trophic variation for Antarctic krill (<i>Euphausia superba</i>) in the Antarctic Peninsula from the austral fall to early winter using stable isotope analysis

ZHU Guoping; ZHANG Haiting; SONG Qi; YANG Yang; WANG Shaoqin; YANG Qingyuan

doi:10.1007/s13131-018-1176-6

基于稳定同位素分析推定秋冬季南极半岛南极大磷虾营养变化

doi: 10.1007/s13131-018-1176-6

1.
上海海洋大学海洋科学学院, 上海 201306, 中国;国家远洋渔业工程技术研究中心, 上海 201306, 中国;大洋渔业资源可持续开发教育部重点实验室极地海洋生态系统研究室, 上海 201306, 中国
2.
上海海洋大学海洋科学学院, 上海 201306, 中国
3.
上海海洋大学海洋科学学院, 上海 201306, 中国;国家远洋渔业工程技术研究中心, 上海 201306, 中国

基金项目: The National Natural Science Fundation of China under contract Nos 41776185 and 41606210; the National Key Technology R&D Program of China under contract No. 2013BAD13B03; the Special Fund for Agro-scientific Research in the Public Interest of China under contract No. 201203018.

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- 收稿日期: 2017-03-28
- 修回日期: 2017-07-29

Inferring trophic variation for Antarctic krill (Euphausia superba) in the Antarctic Peninsula from the austral fall to early winter using stable isotope analysis

1.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China;Polar Marine Ecosystem Group, Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, China
2.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
3.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China

摘要

摘要: 南极大磷虾（Euphausia superba）为南大洋生态系统中的关键种，也是南极生态系统食物网中的重要枢纽。该种秋冬季转换期的营养信息对于理解其知之甚少的越冬机制非常重要。但关于此方面的少数研究在时空变化上仍存在着差异。为此，我们调查了南极半岛秋季（4-5月）和冬季（6月）磷虾成体δ¹³C和δ¹⁵N值的个体、月份及区域性差异。我们的目标旨在检验该期间磷虾的营养变化以及磷虾与其在南极海洋生态系统中的摄食环境之间的关系。结果如下：（1）磷虾δ¹³C值与体长之间无显著关系，但δ¹⁵N值与体长之间则存在显著相关性；（2）秋季磷虾δ¹³C值呈现增长趋势，但冬初季节并无显著变化，此期间δ¹⁵N值无显著不同；（3）布兰斯菲尔德与南设得兰群岛之间的δ¹⁵N平均值显著不同。我们的数据表明南极半岛秋至初冬转换期间磷虾成体营养呈现个体、季节性及区域性变化。
- 南极大磷虾 /
- 稳定同位素 /
- 营养变化 /
- 南极半岛 /
- 食性
Abstract: The Antarctic krill (Euphausia superba) is a key species in the Southern Ocean ecosystem and an important link in the food web of the Antarctic ecosystem. The trophic information for this species during the transition from the austral fall to the winter is important to understand its poorly known overwintering mechanisms. However, the few studies on the topic differ in their results, in terms of both spatial and temporal variables. We investigated the size dependence and monthly and regional variation in δ¹³C and δ¹⁵N values of adult krill in the Antarctic Peninsula, in the austral fall (April to May) and the early winter (June). We aimed to examine the trophic variations of krill occurred during this period, and the relationship between krill and their feeding environment in the Antarctic marine ecosystem. The following results were obtained:(1) no significant relationship was observed between size and the δ¹³C value of krill, but the δ¹⁵N value of krill presented a remarkable association with size; (2) the δ¹³C values of krill increased during the austral fall, but no remarkable variation existed at the onset of winter, and the δ¹⁵N values were not significant different during this period; (3) mean δ¹⁵N values of krill differed significantly between the Bransfield Strait and the South Shetland Islands. Our data imply that adult krill present size-, season-, and region-dependent trophic variation during the transition from austral fall to early winter in the Antarctic Peninsula.
- Euphausia superba /
- stable isotope /
- trophic variation /
- Antarctic Peninsula /
- feeding habit

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参考文献(39)

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基于稳定同位素分析推定秋冬季南极半岛南极大磷虾营养变化

doi: 10.1007/s13131-018-1176-6

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出版历程

Inferring trophic variation for Antarctic krill (Euphausia superba) in the Antarctic Peninsula from the austral fall to early winter using stable isotope analysis

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