Primary productivity of coastal ecosystems in the Seribu Islands (case study on Kelapa Dua Island, Pramuka Island and Pari Island)

Abstract

A determination of the primary productivity in coastal ecosystems, namely mangrove, seagrass and coral reef was done in the Seribu Islands (Kelapa Dua Island, Pramuka Island and Pari Island). Data collection was performed by oxygen methods with a light-dark bottle. Data were collected on 11 - 16 February 2016. The data were Mangrove density, seagrass density, seagrass cover, and, coral reefs cover. Physical-chemical parameters of the water were water temperature, salinity, dissolved oxygen, and nutrient content. Mangrove density in Pramuka Island is the highest among the others with density 19,500 trees/ha. The highest seagrass density is found in Kelapa Dua Island of 1,099 stand/m2. Life corals in Kelapa Dua Island has the highest coverage by percentage of 53.2 %. The calculation results of primary productivity values show the highest value in Pulau Kelapa Dua up to 3.0062 gC / m2 / day. The lowest value obtained in Pari Island that was equal to 0.6 gC / m2 / day. Based on research, mangrove density, seagrass density and life corals coverage have a positive correlation to primary productivity.