热带海洋学报

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基于ZooScan图像分析的“海马”冷泉区浮游动物垂直分布特征

李若飞1,2,柯志新1,2,3,李开枝1,2,3,刘甲星1,2,3,谭烨辉1,2,3   

  1. 1.  中国科学院热带海洋生物资源与生态重点实验室, 中国科学院南海海洋研究所, 广东 广州 510301;

    2.   中国科学院大学, 北京 100049

    3.   南方海洋科学与工程广东省实验室(广州), 广东 广州 511458;


  • 收稿日期:2022-03-24 修回日期:2022-05-01 出版日期:2022-05-05 发布日期:2022-05-05
  • 通讯作者: 柯志新
  • 基金资助:

    南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0401) ;国家自然科学基金项目(32171548, 31971432);国家科技基础资源调查专项(2017FY201404)

Vertical distribution of zooplankton in the "Haima" cold seep region based on ZooScan image analysis

LI Ruofei1,2,KE Zhixin 1,2,3,LI Kaizhi1,2,3,LIU Jiaxin1,2,3,TAN Yehui1,2,3   

  1. 1. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;

    2. University of Chinese Academy of Sciences, Beijing 100049, China

    3. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China;

  • Received:2022-03-24 Revised:2022-05-01 Online:2022-05-05 Published:2022-05-05
  • Contact: Zhixin Ke
  • Supported by:

    the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0401), the National Natural Science Foundation of China (32171548, 31971432), and the Science and Technology Basic Resources Investigation Program of China (2017FY201404)

摘要: 为了解“海马”冷泉区浮游动物的垂直分布以及冷泉活动可能对上方浮游动物群落产生的影响,2020年9月在“海马”冷泉区的5个调查站使用浮游生物分层拖网对1250 m以浅的浮游动物垂直分布进行了调查。使用ZooScan水体粒子扫描仪对不同水层的浮游动物样品进行了分析,获取了不同水层浮游动物的丰度、生物量和粒径谱特征。结果显示:浮游动物丰度和生物量主要集中在0-100 m水层,随着水深增加,浮游动物的丰度和生物量均快速下降,在1000-1250 m水层平均分别仅为8.33 ind. m-3和12.10 mm3·m-3。 总的来看,桡足类是各水层浮游动物的优势类群,胶质类浮游动物在深层中的占比上升。“海马”冷泉区不同站位和水层标准化生物量谱斜率的变动范围为-0.94~-0.57,截距的变化范围为-2.10~5.94。从表层到底层,浮游动物标准化生物量谱基本呈现斜率逐渐增大而截距逐渐减小的趋势。这反映了浮游生态系统的生产力水平从表到底逐渐下降,但浮游食物网的能量传递效率逐渐增加。甲烷气体渗漏强度最大的ROV1站位在1000-1250水层表现出异常的粒径谱特征,生物量谱的斜率a显著低于同水层其他站位,同时在600-800 m水层出现浮游动物丰度的相对高值,推测该站位的浮游动物群落结构可能受到冷泉区甲烷渗漏的影响。

关键词: 粒径谱, 浮游动物, ZooScan, 深海, 冷泉

Abstract: To understand the vertical distributions of zooplankton in regions of the “Haima” cold seep and the possible effects of seep activities, zooplankton samples were collected above 1250 m at 5 survey stations in September 2020. The samples were collected for ZooScan image analysis. The abundance, biovolume and size spectra of zooplankton in different water layers were obtained in this study. The results showed that zooplankton abundance and biovolume were mainly concentrated in the 0-100 m water layer. As depth increased, zooplankton abundance and biovolume decreased rapidly, and only averaged 11.58 ind. m-3 and 41.03 mm3·m-3 at the layer of 1000-1250 m. In general, copepods were the dominant zooplankton in each water layer, and the proportion of gelatinous zooplankton increased in deep layer. The slope of normalized biovolume size spectra in regions of the "Haima" cold seep ranged from -0.94 to -0.57, and the intercept ranged from -2.10 to 5.94. From surface to bottom, the slope of normalized biovolume size spectrum increased and the intercept decreased gradually. It indicated that the productivity of plankton ecosystem declined gradually from the surface to the bottom, but the energy transfer efficiency of plankton food web increased gradually. The layer of 1000-1250m at ROV1 station showed abnormal size spectrum characteristics, and the slope “a” is significantly lower than that of other stations in the same water layer, which might be affected by cold seep activities.

Key words: Size spectrum, Zooplankton, ZooScan, Deep sea, Cold seep