京浜運河における底生生物からみた自然再生の可能性

抄録

Enhancing macrobenthos diversity is an attractive restoration objective for urban coastal area as canals and harbors. To determine constraints of environmental restoration in such enclosed and entrapped water body, survey based approach was taken at Keihin Canal, Japan as a case study. We had sampled water, sediment and macrobenthos from 14 stations at October 2005. The separated sample for short-necked clams were collected from 7 stations in the same period. The constraints are elevation of the site, Chemical Oxygen Demand (COD), and silt-clay fraction for overall macrobenthos abundance while low salinity due effluent from outfall of sewage giving additional constraint for short-necked clam diversity.