热带海洋学报 ›› 2013, Vol. 32 ›› Issue (3): 40-46.doi: 10.11978/j.issn.1009-5470.2013.03.006cstr: 32234.14.j.issn.1009-5470.2013.03.006

• 海洋生物学 • 上一篇    下一篇

夏冬两季大亚湾典型海域浮游植物粒级结构特征*

马艳娥1, 2, 柯志新1, 黄良民1, 谭烨辉1   

  1. 1. 中国科学院海洋生物资源可持续利用重点实验室, 广东 广州510301; 2. 中国科学院大学, 北京100039
  • 收稿日期:2012-02-17 修回日期:2012-04-05 出版日期:2013-08-27 发布日期:2013-08-28
  • 通讯作者: 中国科学院创新方向项目(KZCX2-YW-Q07)
  • 作者简介:马艳娥(1980—), 女, 湖北省随州市人, 在读博士生, 主要从事海洋生态学研究。E-mial: maye@scsio.ac.cn

Phytoplankton biomass size structure in Daya Bay during summer and winter

MA Yan-e1, 2, KE Zhi-xin1, HUANG Liang-min1, TAN Ye-hui1   

  1. 1. Key Laboratory of Marine Bio-resources Sustainable Utilization (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; 2. University of Chinese Academy of Sciences, Beijing 100039, China;
  • Received:2012-02-17 Revised:2012-04-05 Online:2013-08-27 Published:2013-08-28
  • Contact: 柯志新。E-mail: kzx@scsio.ac.cn

摘要:

于2010年8月和2011年1月对大亚湾6个典型站位的浮游植物进行采样调查, 估算了浮游植物细胞体积, 分析了各区域浮游植物的粒级组成, 比较了大亚湾各典型站位浮游植物生物量的粒级结构差异。大亚湾浮游植物的细胞体积范围为64—496757μm3, 以1600—3200μm3粒级的浮游植物种类最多, 分布在粒级谱两端的浮游植物的种类较少。夏季大亚湾浮游植物细胞丰度和由细胞体积转换的湿重生物量高于冬季, 夏季平均为76.5×104个·L-1和1.6mg·L-1, 冬季平均为22.52×104个·L-1和0.45mg·L-1。夏冬两季均以营养盐水平高且水交换能力差的S8站位生物量最高, 且该站夏冬两季均以甲藻为主。夏季大亚湾湾内站位和冬季大部分站位顶端粒级的种类对浮游植物初级生产力和碳库的贡献很重要, 但因为丰度小, 在细胞丰度表示的浮游植物现存量和优势种中没有体现, 细胞体积转换生物量则能更为客观合理地表征浮游植物现存量和作为优势种的判断依据。

关键词: 浮游植物, 细胞体积, 粒级结构, 生物量, 大亚湾

Abstract:

Based on samples collected at six typical sites of Daya Bay in August 2010 and January of 2011, phytoplankton cell volume was estimated, phytoplankton size structure was analyzed, and phytoplankton biomass size structure was investigated. Cell volume of phytoplankton in Daya Bay was in the range of 64 to 496757 μm3, though only a few species distributed at the two ends of the range; the species distributed in the range of 1600-3200 μm3 were the richest. Phytoplankton cell abundance and cell volume converted biomass were 76.5×104 cell·L-1 and 1.6 mg·L-1 in summer, and 22.52×104 cell·L-1 and 0.45 mg·L-1 in winter, respectively, which were both obviously lower than those in summer. S8 that was labeled by highest nutrient and lowest water exchange capability showed the highest biomass and was dominated by dinoflagellates in both summer and winter. At most sites in winter and those sites inside the bay in summer, the species with the largest cell size made significant contribution to biomass and carbon stock. However, the contribution of large species with low abundance could not be seen through cell abundance represented biomass and key species. Biomass converted by cell volume was comparatively a more reasonable way to represent phytoplankton stock and to identify key species than cell abundance.

Key words: phytoplankton, cell size, size structure, biomass, Daya Bay

中图分类号: 

  • P735.531