2003 Volume 29 Issue 1 Pages 62-67
The macrobenthic community in the main natural and man-made seashores in Tokyo Bay were surveyed in the summer of 2001. The result of the principle component analysis shows that the faunal composition depended on the principle habitat types as foreshore, estuary and lagoon. The difference between man-made and natural shores was not recognized. The result of multiple regression analysis of the main component shows that chemical oxygen demand and salinity of water and silt-clay content of bed-soil were effective variables. The fauna was however different between the bay-mouth and inner bay-area, influenced by regional condition. Crab community strongly depended on the development of marsh vegetation and the silt-clay content of bed-soil. The abundance of vegetation and topography in supra-tidal area supported the life of semi-terrestrial crabs.
