Biomass and Carbon Mapping in the Seagrass Beds at Blebak Beach, Jepara, Indonesia
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Abstract
Seagrass is one of the important ecosystems in coastal areas, alondside mangrove and coral reefs. It plays an important ecological role, particularly in carbon storage. This study aimed to identify the seagrasses species, their distribution, biomass, and carbon stock at Blebak Beach, Jepara, Indonesia. The research utilized a survey method with purposive sampling based on seagrass distribution and the surrounding ecosystems. Biomass and carbon stock sampling focused on individuals with dominant density and coverage values. Biomass and carbon estimates were calculated using the Loss on Ignition (LoI) method, while seagrass distribution was mapped using the supervised classification method. Biomass and carbon stock distribution were analyzed using Inverse Distance Weighted (IDW) interpolation. The results identified four seagrass species: Enhalus acoroides, Thalassia hemprichii, Oceana serullata, and Cymodocea rotundata, covering a total area of 0.45165 ha with a patchy distribution pattern. T. hemprichii exhibited the highest density, at 85,143 stands·m-2, with a total seagrass coverage of 23.91%. The seagrass biomass (dry weight) ranged from 220.89 to 1,320.03 g·m-2, with belowground biomass contributing approximately 60% of the total biomass. The estimated total carbon stock ranged from 110.96 to 691.29 g·m-2, with belowground carbon accounting for 61% of the total carbon stock.
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