Dynamic model on the economic value of mangrove ecosystems in Tangerang Coastal Area, Banten

Abstract

Abstract. Aida GR, Wardiatno Y, Fahrudin A, Kamal MM. 2016. Dynamic model on the economic value of mangrove ecosystems in Tangerang Coastal Area, Banten. Bonorowo Wetlands 6: 26-42. The purpose of this research is to estimate mangrove productivity through the production of litter; that includes: estimating the potential fisheries production through mangrove litter production approach; estimating the mangrove ecosystem value from potential fisheries of mangrove litter production, existing fisheries, and aquaculture; and determining a dynamic model of mangrove ecosystems value for fisheries and the aquaculture in coastal areas of Tangerang District, Banten. The study was conducted in May-July 2014, with the sampling location conducted in the Kronjo Subdistrict, Tangerang District, Banten. The data required include mangrove vegetation characteristics, physical and chemical parameters of the aquatic environment, mangrove litter production, socio-economic data related to the utilization of mangrove ecosystem, and secondary data related. The potential fisheries that are supported by mangroves are calculated by the method developed by Mahmudi (2008), the value of fisheries existing and aquaculture obtained through the consumer surplus approach. Based on the research, the production of mangrove litter which consists of Avicennia marina, Avicennia alba, Rhizophora mucronata and Sonneratia caseolaris reaches 3.47 g/m²/day or 12,492 kg/ha/yr. Coastal fisheries potential of the ecosystem can support 1,134.01 kg/ha/yr with the value reaching Rp 27,016,978.57/ ha/yr. The value of actual fisheries reaching Rp.5,442,896,260/ha/yr and aquaculture Rp.8,012,608/ha/yr. The result of the dynamic model simulation shows that in the existing condition, the total value of mangroves used is not sustainable and continued to decline. While mangrove rehabilitation at least 2.27 ha/yr could maintain the sustainable value of mangrove used. Mangrove rehabilitation also needs to consider the composition of mangrove species to produce fishery potential that can be supported optimally and increase the total value of mangrove utilization.