High photosynthetic activity in a continuous culture system of filamentous diatom caused by continuous harvest

概要

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A high net production of filamentous diatom (Melosira varians) was maintained by continuous harvest. In the culture box, a part of the algal mat on the bottom floated by the formation of oxygen bubbles within the algal mat due to photosynthetic activity. Two types of culture boxes: harvest boxes of floating algal mat anda: non-harvest boxes were used to determine the effect og a continuous culture system. There was a slow downwaeds current with water og the culture system. The productionrate was checked by the oxygen production rate in the culture systems of filamentous diatom. Oxygen production rate per unit area was measured by the current rate and the difference of dissolved oxygen in the inflow water and the outflow water. In the daytime, a high production rate of oxygen was observed in both boxes in the nighttime was shown to have a similar value. The difference in the oxygen production rate was caused by the continuous harvest. This treatment allowed much more solar radiation to reach the young diatom cells on the bottom.
信州大学の論文
2004-02-28