2023 Volume 79 Issue 18 Article ID: 23-18124
Recently, it has been revealed that coastal areas and lakes and mashes play a role in absorbing carbon dioxide, suggesting the necessity of establishing a carbon credit approach for the freshwater carbon system. We proposed and verified a new method for estimating carbon dioxide sequestration and reduction using the equation of DIC metabolism (DIC equation). The proposed method has the advantage of considering only vegetation density and length, indicating its potential for use as a new method. The estimated annual sequestration of carbon dioxide by eelgrass in Komuke Lagoon, located in Hokkaido, Japan, using the DIC equation was 1.41 tonnes CO2 ha-1 year-1, which is close to the value estimated value obtained from the carbon content of eelgrass in Komuke Lagoon and also the estimated value obtained by leaf marking methods in Lake Akkeshi, located in Hokkaido, Japan.
