Hawaii's wetland restore water quality by removing toxic wastes, excess nutrient s, sediments, and other pollutants from runoff.
Wetlands also prevent flooding b y storing water and then releasing it slowly downstream.
Wetlands are also one o f the most important ecosystems. Birds breed, nest, feed and escape their predat ors in wetlands. Wetlands also buffer shorelines against erosion and they absorb some greenhouse gases. Prior to the settlement of the Europeans in Hawaii, it is hard to find just how much of the land was wetlands. Each of the ponds provided an average of 18 acres of wetland area throughout the State.