Analisis Tingkat Produktivitas Primer berdasarkan Nilai Klorofil-A di Daerah Penangkapan Cumi-Cumi (Uroteuthis sp.) Perairan Selat Malaka

Abstract

The Malacca Strait is a marine region located along the equator, thus playing a significant role in climate variability that influences primary productivity through various factors. This study aims to examine the distribution of chlorophyll-a, sea surface temperature, and surface ocean currents; compare chlorophyll-a concentrations at the surface and in the water column; and analyze the relationship between chlorophyll-a levels and primary productivity in the Malacca Strait. Data were collected through direct field observations and satellite image processing using SeaDAS and ArcGIS software. The results showed that chlorophyll-a concentrations from July to December ranged from 1.189 to 3.297 mg/m³, sea surface temperature ranged from 26.56o to 29.92°C, and surface current velocity ranged from -0.041 to 0.191 m/s. The comparison of chlorophyll-a between surface and column waters in the Malacca Strait was not statistically significant due to differences in sunlight penetration. The relationship between chlorophyll-a and primary productivity was found to be positive and strongly correlated. This research is expected to provide valuable information regarding the level of primary productivity based on chlorophyll-a in marine waters using the Vertically Generalized Production Model (VGPM).