Abstract
Comparing the nutrient compositions of cultured different-sized fractions of dominant phytoplankton species Skeletonema costatum, Chaetoceros curvisetus, and Thalassiosira nordenskiöldii collected in different sea areas in various seasons, the N content of these species was similar, while the C, P, and Si contents of S. costatum from eutrophic Changjiang estuary were higher than those from Jiaozhou Bay . The C, N, P, and Si contents of cultured phytoplankton from Jiaozhou Bay increased with size fraction augmentation, and the percentages of C, N, and P followed the same trend, while the percentage of Si remained constant. Moreover, S. costatum from small-sized fraction assimilated Si more easily than C. curvisetus and T. nordenskiöldii, which is explained by the dominance of S. costatum under the conditions of low SiO3–Si concentration in Jiaozhou Bay seawater. The C, N, P, and Si contents of cultured S. costatum collected during winter were highest, which is consistent with the phytoplankton blooming seasons in Jiaozhou Bay. The very low SiO3–Si concentration in the seawater during spring restrained the growth of phytoplankton , supported by the fact that the N, P, and Si contents and their ratios in cells of cultured S. costatum were low in spring season .
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Pan, S., Shen, Z., Liu, W., Han, X., Miao, H., Ma, H. (2020). Differences in Nutrient Compositions of Cultured Marine Diatoms: Different Sea Areas, Sizes, and Seasons. In: Shen, Z. (eds) Studies of the Biogeochemistry of Typical Estuaries and Bays in China. Springer Earth System Sciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-58169-8_16
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