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Seagrass Aboveground Carbon Stock Mapping using PlanetScope SuperDove Image in Nemberala, Rote Island, East Nusa Tenggara
Last modified: 2022-12-15
Abstract
Seagrass ecosystems is considered as a nature-based solution for climate change adaptation and mitigation through the blue carbon sequestration. There are 16 seagrass species in Indonesia and the high diversity of these species supports the high potential of carbon that can be absorbed and stored. This study aims to develop a general equation to estimate seagrass aboveground carbon stock (AGC) from the percent cover (PC), and to map seagrass AGC using PlanetScope imagery in Nemberala, Rote Island. Nemberala has very diverse seagrass species such as Enhalus acoroides (Ea), Thalassia hemprichii (Th), Cymodocea rotundata (Cr), Syringodium isoetifolium (Si), Thalassodendron ciliatum (Tc), and Halophila ovalis (Ho). The results of laboratory analysis using the Loss on Ignition method to extract the carbon stock values of each species were 0.354, 0.066, 0.017, 0.046, 0.039, and 0.004 (gC/leaf) for Ea, Th, Cr, Si, Tc, and Ho, respectively. The general equation for predicting AGC from PC is SeagrassAGC = (1.4955*SeagrassPC) - 40.756 with r of 0.61 and R2 of 0.37. This formula will be applied to convert field seagrass PC data to AGC, which will then be used to train and assess the accuracy of seagrass AGC mapping based on PlanetScope SuperDove 8 bands image.