极地研究

极地研究 ›› 2022, Vol. 34 ›› Issue (4): 451-458.DOI: 10.13679/j.jdyj.20210075

• 研究论文 • 上一篇    下一篇

阿蒙森海夏季南极磷虾资源空间分布及其与叶绿素浓度的关系

李帅  杨嘉樑  赵国庆  李灵智  饶欣  黄洪亮   

  1. 中国水产科学研究院东海水产研究所, 农业农村部远洋与极地渔业创新重点实验室, 上海 200090
  • 出版日期:2022-12-31 发布日期:2023-01-12
  • 通讯作者: 黄洪亮
  • 作者简介:李帅, 男, 1994年生。硕士, 主要从事海洋渔业资源研究。E-mail: lishuai@ecsf.ac.cn
  • 基金资助:
    中国南北极环境综合考察与评估专项(IRASCC2020-2022)资助

Spatial distribution of Antarctic krill and their relationship with chlorophyll concentration in the Amundsen Sea in summer

Li Shuai, Yang Jialiang, Zhao Guoqing, Li Lingzhi, Rao Xin, Huang Hongliang   

  1. Key Laboratory of Oceanic and Polar Fisheries, Ministry of Agriculture and Rural Affairs; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
  • Online:2022-12-31 Published:2023-01-12

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摘要： 南极磷虾(Euphausia superba)广泛分布于南大洋海域, 环境因子对南极磷虾资源密度及分布具有重要影响。基于我国第36次南极科学考察声学评估结果和调查数据, 利用单因素方差分析和双变量相关分析对2020年1月9日—2020年2月5日期间阿蒙森海南极磷虾资源空间分布特征及与叶绿素浓度之间的关系展开研究。结果表明, 调查期间阿蒙森海南极磷虾平均资源密度为6.36 g·m–2, 0~5 g·m–2密度区间比例最高(68.18%); 南极磷虾资源密度存在显著的空间差异(P<0.05), 集中分布在阿蒙森海近岸(72.75°S—76.25°S)和西侧(150°W—158°W)海域。调查海域平均叶绿素浓度为3.54 mg·m–3, 2~3 mg·m–3浓度区间比例最高(38.31%); 叶绿素浓度存在显著的空间差异(P<0.05), 在阿蒙森海近岸海域(72.75°S—76.25°S)和东西两侧(114°W—119°W和140°W—158°W)海域较高。叶绿素浓度与南极磷虾资源密度分布具有显著的正相关关系(P<0.05)。

关键词: 南极磷虾, 声学评估, 资源密度, 叶绿素浓度, 空间分布, 阿蒙森海

Abstract: Antarctic krill (Euphausia superba) are widely distributed in the Southern Ocean. It is a key species in the Southern Ocean ecosystem and an important food source for whales, fish, penguins and birds, and their density and distribution are strongly affected by environmental factors. Based on acoustic evaluation and survey data from the 36th Chinese Antarctic Research Expedition, One-way ANOVA and bivariate correlation analysis were used to study the spatial distribution characteristics and the relationship with chlorophyll concentration of Antarctic krill in the Amundsen Sea from January 9, 2020 to February 5, 2020. The results showed that the average resource density of Antarctic krill in the Amundsen Sea was 6.36 g·m–2, with the highest proportion (68.18%) falling in the density range of 0~5 g·m–2. Spatial variability in Antarctic krill density was statistically significant (P<0.05). Antarctic krill resources were concentrated in the inshore (72.75°S—76.25°S) and western regions (150°W—158°W) of the Amundsen Sea. The average chlorophyll concentration in the study area was 3.54 mg·m–3, with the highest proportion (38.31%) falling in the 2~3 mg·m–3 concentration range. There was also significant spatial variability in chlorophyll concentrations (P<0.05), which were higher in the coastal waters (72.75°S—76.25°S) and on the eastern and western sides (114°W—119°W and 140°W—158°W) of the Amundsen Sea. A significant positive correlation between chlorophyll concentration and the resource density distribution of Antarctic krill was detected (P<0.05).

Key words: Euphausia superba, acoustic evaluation, resource density, chlorophyll concentration, spatial distribution, Amundsen Sea