人工干潟における底生動物相の回復を目指した実験的検討

抄録

The purpose of this study was to improve the quality of sediment through sand covering and to improve the quality of water through aeration, in order to restore the population of zoobenthos. This study made it possible to verify the consistency of effect that these methods bring about, and what countermeasures may be necessary. The sand covering effects are verified by total sulfide reduction from the sediment and inhabiting benthos. The aerators were set on a constructed tidal flat to reduce the baneful effect of the surrounding hypoxic seawater on zoobenthos. The effect on benthic animals was obtained from the aeration experiment of three years. Long-term monitoring is needed for evaluating the full effect of aeration on zoobenthos. As a result of this study, guideline for the management and countermeasures to be taken in the next construction of tidal flats has been verified by the quality of environmental improving techniques and consistency of effect.