热带海洋学报 ›› 2015, Vol. 34 ›› Issue (2): 32-38.doi: 10.11978/j.issn.1009-5470.2015.02.005

• 海洋生物学 • 上一篇    下一篇

南海南部浮游动物稳定同位素研究——氮稳定同位素

刘华雪1, 徐军2, 李纯厚1, 陈作志1, 黄洪辉1   

  1. 1. 中国水产科学研究院南海水产研究所, 广东省渔业生态环境实验室, 农业部南海渔业资源开发利用重点实验室, 广东 广州 510300;
    2. 中国科学院水生生物研究所, 湖北 武汉 430072
  • 收稿日期:2014-06-08 修回日期:2014-09-01 出版日期:2015-04-10 发布日期:2015-04-12
  • 通讯作者: 黄洪辉。E-mail: huanghh@scsfri.ac.cn
  • 作者简介:刘华雪(1984~), 男, 山东省济宁市人, 博士, 从事海洋生态学研究。E-mail: liuhuaxue@scsfri.ac.cn
  • 基金资助:
    公益性行业(农业)科研专项(201403008); 农业部财政重大专项(NFZX2013); 广东省自然科学基金项目(S2013040016424); 中央级公益性科研院所基本业务费(2013TS07); *调查取样过程中得到了“南锋”号科学考察船工作人员的协助, 数据分析得到了陈绵润博士的帮助, 谨致谢忱

Stable nitrogen isotope of zooplankton in the southern South China Sea

LIU Hua-xue1, XU Jun2, LI Chun-hou1, CHEN Zuo-zhi1, HUANG Hong-hui1   

  1. 1. Key Laboratory of Fishery Ecology and Environment, Guangdong Province; Key Laboratory of South China Sea Fishery Resource Exploitation & Utilization, Ministry of Agriculture; South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China;
    2. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
  • Received:2014-06-08 Revised:2014-09-01 Online:2015-04-10 Published:2015-04-12

摘要: 研究分析了南海南部海域不同粒径浮游动物春季和夏季的生物量和氮稳定同位素特征。结果表明, 海域大部分站位春季浮游动物生物量高于夏季(p<0.05), 而夏季在西南陆架区生物量出现极高值(受西南陆架上升流影响), 拉高了夏季的均值。根据粒径将浮游动物分成3组, 分别是大于500μm组(大型)、380~500μm组(中型)和180~380μm组(小型)。大型浮游动物生物量在夏季的比例更高, 而中型和小型浮游动物在春季的比例更高。春季浮游动物氮稳定同位素δ15N值高于夏季, 大部分站位大型浮游动物的δ15N值高于中型, 而小型浮游动物的δ15N值最低。广义加性模型(GAM)分析显示, 小型浮游动物δ15N值受环境和生物因子的共同影响非常明显。

Abstract: Stable isotope analysis has emerged as one of the primary means to analyze the structure of food webs. Size fractionated zooplankton biomass and stable isotopes in the southern South China Sea during spring and summer 2013 were investigated. The results showed that zooplankton biomass in spring was higher than those in summer at most sites (p<0.05), while the maximal value was found in the southwestern continental shelf (influenced by coastal upwelling) with increased mean value of zooplankton biomass during summer. Zooplankton was divided into three groups according to size. Macro- zooplankton contributed more to the total zooplankton biomass during summer, while meso- and micro-zooplankton contributed more during spring. Mean δ15N value in spring was higher than that in summer, and the δ15N value of macro-zooplankton was higher than those of meso- and micro-zooplankton at most sites. Zooplankton biomass was negatively related to mixed layer depth and seawater temperature at 75-m depth, and positively related to salinity at 75 m, indicating that zooplankton biomass was influenced by vertical mixing. The result of GAM (generalized additive model) indicated that the δ15N value of micro-zooplankton was affected by combined impacts by environmental and biological factors.