干潟域における底生微細藻類の総光合成速度に関する一考察

概要

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The light-dark bottle method and benthic chamber method were used to estimate the gross photosynthetic rate of benthic tidal microalgae. In the light-dark bottle method, 0.5g of wet bottom sediment and an incubation time of 6 hours were employed for the measurement of the photosynthetic rate of the benthic microalgae. The gross primary production of the benthic microalgae at the in situ temperature and photon flux density, determined by the light-dark bottle method, reached 2.1 gC · m-2 · day-1 on October 7, 2003 at the experimental tidal flat in Hannan Second District, Osaka Bay. The gross photosynthetic rate per unit chlorophyll a concentration of the benthic microalgae increased with increasing photon flux density in the benthic chamber. Using the present benthic chamber method, together with the in situ photon flux density and chlorophyll a concentration of the bottom sediment, the gross production of the benthic microalgae was estimated to be an average of 0.34gC · m-2 · day-1 at the Wakagawa tidal flat on October 3, 2005.
社団法人　日本水環境学会の論文
2007-08-10