2010 Volume 66 Issue 1 Pages 1146-1150
The earlier Tokyo Bay before reclamation (tidal flat existing system) and the existing Tokyo Bay (present system) were simulated by ECOHYM, the ecological model representing benthic-pelagic ecosystem coupling, and were compared to investigate the tidal flat function on hypoxia and ecological chain from the lower to higher level trophic production. ECOHYM demonstrated that the tidal flat existing system decreased 50 % volume of hypoxia and increased 15% biomass of benthic fauna, treated as higher level living-organism in ECOHYM compared to the present system. In contrast, inhibition of nutrients load derived from rivers did not accelerate the ecological chain path from the lower to higher trophic level, although it was effective to decrease hypoxia and mortality of benthic fauna due to oxygen depletion. These results show that a bountiful ecosystem is not restored only by the inhibition of eutrophication but also by the recreation of tidal flats.
PROCEEDINGS OF COASTAL ENGINEERING, JSCE
PROCEEDINGS OF THE JAPANESE CONFERENCE ON COASTAL ENGINEERING
