Total organic matter, carbon organic, nitrate, phosphate content in sediment at mangrove ecosystem of Angke Kapuk Protected Forest, DKI Jakarta

Abstract

The Angke Kapuk Protected Forest (AKPF) as a mangrove ecosystem faces contamination due to the presence of waste. The waste influence the nutrient content in ecosystem. This research aims to measure the content of total organic matter (TOM), organic carbon (C-Organic), nitrate, and phosphate content in the sediments of the AKPF, DKI Jakarta. The study used a survey method, sample selection using purposive sampling technique. TOM was observed using loss on ignition (LOI), C-Organic gravimetric method, while nitrate and phosphate potentiometric methods. The nutrient content in the mangrove sediments of AKPF was varied from low to high fertility. The average TOM in 3 sampling station 1 were classified as high fertility (17.39% – 26.14%). The average C-Organic in 3 sampling station were classified as moderate fertility (10.09% – 15.17%). The average nitrate in station 1 (0.385 mg/100 g), station 2 (0.28 mg/100 g) were classified as moderate fertility, while station 3 was classified as low fertility (0.195 mg/100 g). The average phosphate in 3 sampling station were classified as low fertility (0.05 mg/100 g – 0.07 mg/100 g). The nutrients were influenced by a large amount of plastic waste, such as buried and hardto-decompose plastic packaging of household products and other pollutants mixed with the sediments.