Abstract
This study showed how the daytime length in Jiaozhou Bay affected the water temperature, which in turn affected the phytoplankton growth when solar radiation was sufficient for phytoplankton photosynthesis. Jiaozhou Bay observation data collected from May 1991 to February 1994 were used to analyze the daytime length vs water temperature relationship. Our study showed that daytime length and the variation controlled the cycle of water temperature fluctuation. Should the cyclic variation curve of the daytime length be moved back for two months it would be super-imposed with temperature change. The values of daytime length and temperature that calculated in the dynamical model of daytime length lag vs water temperature were consistent with observed values. The light radiation and daytime length in this model determined the photochemistry process and the enzymic catalysis process of phytoplankton photosynthesis. In addition, by considering the effect of the daytime length on water temperature and photosynthesis, we could comprehend the joint effect of daytime length, water temperature, and nutrients, on the spatiotemporal variation of primary production in Jiaozhou Bay.
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This study was funded by NSFC (No. 40036010), and by the Director’s Foundation of the Beihai Monitoring Center of the State Oceanic Administration.
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Dongfang, Y., Zhenhui, G., Jing, Z. et al. Examination of daytime length’s influence on phytoplankton growth in Jiaozhou Bay, China. Chin. J. Ocean. Limnol. 22, 70–82 (2004). https://doi.org/10.1007/BF02842803
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DOI: https://doi.org/10.1007/BF02842803