The relation between quality of the sediment (nitrate, phosphate) and Avicennia sp density, case study; Mangrove Center Bengkak, Banyuwangi Regency, East Java

Bengkak mangrove center as a natural environment has been managed by the society as a means of tourism and preservation. These areas were located on Bali strait, consist of fisheries activity and residential. This study aims to determine the density of Avicennia sp, nitrate and phosphate content and the relationship between both. Three stations were determined using purposive sampling and the sample was obtained using the belt transect technique. Linear regression analysis was carried out to determine the density of Avicennia sp, with nitrate, phosphate content. Results of this study showed that the highest density of Avicennia sp was found in station 3 with a value of 3.25, followed by station 2 of 1.38, and the lowest density at station 1 was 0.71. Nevertheless, the highest concentrations of nitrate and phosphate were found at station 3 of 207.27 mg/kg and 0.23%. The relationship between the density of Avicennia sp, with nitrate and phosphate showed a positive correlation.