夏冬两季大亚湾典型海域浮游植物粒级结构特征*

doi:10.11978/j.issn.1009-5470.2013.03.006

Abstract

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 μm³were 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

CLC Number:

P735.531

MA Yan-e, KE Zhi-xin, HUANG Liang-min, TAN Ye-hui. Phytoplankton biomass size structure in Daya Bay during summer and winter[J].Journal of Tropical Oceanography, 2013, 32(3): 40-46.

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Phytoplankton biomass size structure in Daya Bay during summer and winter

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