Abstract
Human beings receive great benefits from ocean resources. Therefore, it is extremely important to assess the future effects of deep seabed mining on oceanic life and environmental conservation. Under the supervision of the Ministry of International Trade and Industry (MITI), MMAJ has been carried out environmental impact research for establishing the criteria for seabed mining in close collaboration with the National Oceanic and Atmospheric Administration of the United States (NOAA) from 1989.In order to evaluate the impact of sediment discharges upon the benthic environment, the artificial resedimentation experiment was carried out in the Japanese pioneer area in 1994 (JET: Japan Deep Sea Impact Experiment). Moreover the observation on the condition of the sea floor after disturbance was continued in 1994 and 1995 by the Deep-sea Camera and sediment sampling. As a result of our experiment, it was suggested that the effects on oceanic life was observed.
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