Primary Productivity Variation in Banten Bay and Java Sea and Its Relationship With Fish Catches Muhammad Ikhwan Fadillah Giantara*
Oceanography, Faculty of Earth Sciences and Technology, Bandung Institute of Technology
Jalan Ganesha No.10, Bandung, 40132, Jawa Barat, Indonesia
*ikhwanfadillah098[at]gmail.com
Abstract
Ecosystems carry out internal activities, one of which is by carrying out production which is the process of inputting and storing energy from sunlight as a primary energy source called primary productivity. The development of wider coastal areas is a major factor in the importance of assessing the quality of water fertility as a measure of ecosystem change. The purpose of this study is to obtain primary productivity data in Banten Bay and the Java Sea seasonally from MODIS Fluorescence satellite images from 2005 to 2020 and processed using the Vertically Generalized Production Model (VGPM). The NPP results obtained in Banten Bay in the West Season 148.23 mgC.m^-3.d^-1- Transitional Season I 148.06 mgC.m^-3.d^-1. East Season with 154.05 mgC.m^-3.d^-1- Transitional Season II 170.10 mgC.m^-3.d^-1 while in the Java Sea in the West Season 100.05 mgC.m^-3.d^-1- Transitional Season I 82.20 mgC.m^-3.d^-1- East Season 110.84 mgC.m^-3.d^-1- Transitional Season II 95.97 mgC.m^-3.d^-1 which decreased in value by 0,04 mgC.m^-3 per year in both regions. Water fertility in Banten Bay and the Java Sea is higher in the nearshore area than the open sea which is influenced by chlorophyll-a, PAR, day length, temperature, maximum carbon fixation, euphotic zone depth, and area. Trophic status in each season in Banten Bay is included in the Oligotrophic class while in the Java Sea it is included in the Oligotrophic and Mesotrophic classes. NPP has a positive correlation with the total catch of small pelagic fish species of 0,654 (average).
