Seasonal Variation in Lower Trophic Level Ecosystem of Hakata Bay, Japan |
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| Authors: | Tetsuo Yanagi Goh Onitsuka |
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| Institution: | (1) Research Institute for Applied Mechanics, Kyushu University, Kasuga, 816-8580, Japan;(2) Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga, 816-8580, Japan |
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| Abstract: | The seasonal variation in lower trophic level ecosystem of Hakata Bay, Japan is investigated using observed data from April 1993 to March 1994 and a numerical ecosystem model. Primary production was largest in September 1993 due to high DIP concentration but secondary production was largest in August 1993 due to high water temperature. Yearly averaged primary production in Hakata Bay is larger than that in the Seto Inland Sea but yearly averaged secondary production in Hakata Bay is smaller than that in the Seto Inland Sea. New production was nearly the same as regenerated production in summer but the former was larger than the latter in winter. Yearly averaged ratio of new production to regenerated production in Hakata Bay is larger than that in the open ocean. |
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| Keywords: | Numerical ecosystem model phosphorus budget transfer efficiency new production |
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