Although various actions--including the removal of introduced species, environmentally friendly operation of water-level control and restoration of lagoons--have been taken to resolve those issues, sufficient results have not been achieved.
それらへの対抗策も講じられ、外来種駆除や生態系に配慮した水位操作、内湖の再生など様々な取り組みが行われているが、まだ十分な効果をあげられていない。