Influence of Reclamation on the Coastal Environment in Hakata Bay, Particularly the Effect on Benthic Animals in Tidalflats and Shallow Sea.

概要

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The influence of reclamation on benthic animals in Hakata Bay, Fukuoka, Japan, was reviewed. In Hakata Bay, large-scale reclamation has been ongoing since the 1970s. The east side of Hakata Bay has been almost closed from the sea by the construction of two huge reclaimed lands, Kashii Park Port (126 ha) and Island City (artificial island, 401 ha). Temporal changes in species composition and the density of benthic animals including polychaetes, molluscs, crustaceans, were researched at Wajiro Flat and Kashii Beach. The density greatly decreased at both Wajiro (2, 819 ind./m2 in 1982 to 1, 582ind./m2 in 1993) and Kashii (3, 524 ind./m2 in 1982 to 1, 326 ind./m2 in 1998). The decrease in polychaetes was conspicuous at both Wajiro (1, 600ind./m2 in 1982 to 341ind/m2 in 1993) and Kashii (2, 081 ind./m2 in 1982 to 457 id/m2 in 1998). The changes may be due to the stagnation of seawater due to coastal reclamation and to increased sewage discharge.
日本ベントス学会の論文