Distributions of dissolved inorganic nitrogen to estimate trophic state in Jakarta Bay

2nd International Conference on Integrated Coastal Management and Marine Biotechnology,

Prismayanti, A.D.^1 ; Damar, A.^2^3 ; Pratiwi, N.T.M.^2

Graduate Student from Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Indonesia^1

Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Indonesia^2

Center for Coastal and Marine Resource Studies, Bogor Agricultural University, Bogor Agricultural University, Indonesia^3

关键词: Coastal area;    Dissolved inorganic nitrogens;    Mesotrophic;    Organic materials;    River mouths;    Temporal distribution;    Trophic state;    Trophic status;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/241/1/012023/pdf
DOI  :  10.1088/1755-1315/241/1/012023

来源: IOP

【 摘 要 】

Jakarta Bay is a coastal area that receives a lot of organic material input from rivers in Jakarta. The organic material is decomposed into nutrients and has implications for increasing the trophic state of Jakarta Bay. The aims of this study are to analyze the spatial distribution of dissolved inorganic nitrogen (DIN) and to estimate the trophic state of Jakarta Bay. The study was conducted from July to October 2017. Spasio-temporal distribution analysis of nitrogen was carried out with ArcGIS 10.4.2. Estimation of trophic state used TRIX Index. Ammonia and DIN distribution tends to be higher in the river mouth and in the middle of the bay, nitrite was higher in the eastern part of the bay and river mouth, while nitrates tend to be higher in the eastern part of the bay to the middle waters. Trophic state of Jakarta Bay can be divided into three trophic status, hypertrophic in coastal area, eutrophic in the middle of the bay, and mesotrophic in the high seas.