Seagrass Species Composition and Above-Ground Carbon Stock Mapping in Parang Island using PlanetScope Image

摘要

Seagrass beds with various species are widespread in Indonesia, where one of them is on Parang Island. The importantrole of seagrasses as a store of carbon stocks that prevent an increase in earth temperature makes the seagrass speciescomposition and carbon stocks on Parang Island need to be inventoried and known for their existence. Seagrass data,especially on Parang Island, is not yet available, so an inventory and mapping are needed. PlanetScope image is one imagethat is expected to be able to map biophysical information on seagrass beds. The objectives of this study are (1) to map thecomposition of seagrass species and (2) to map the seagrass above-ground carbon stock (AGC) and estimate the totalseagrass AGC stored on Parang Island, Karimunjawa Islands using PlanetScope. The composition of seagrass species wasobtained through multispectral classification (maximum likelihood, random forest, support vector machine) and AGCseagrass through empirical modeling. The class composition of seagrass species obtained was Cymodocea rotundata (Cr),Enhalus acoroides (Ea), Thalassia hemprichii (Th), and EaThCr, with the accuracy of 32.16%. Seagrass AGC empiricalmodeling has an R2 0.086. The DII23 water column corrected band has the highest accuracy for seagrass AGC mapping,which is 66.90% with a Standard Error of Estimate (SE) value of 4.78 gC/m2. The total estimated AGC of seagrass foundon Parang Island is 50.15 t C.