Abstract

The Sangomar Marine Protected Area (MPA), located approximately 50 km from the Sangomar oil field, has raised concerns regarding the potential impact of oil activities on its resources. This study aims to determine the quality of the MPA's waters prior to the commencement of oil exploitation. Samples were collected at three locations of ecological importance and accessibility (Bakina, Sofna, and Djiffer) during both the dry and wet seasons over a two-year period (2023-2024). The study found strong seasonality for most of the parameters studied, with pH remaining relatively stable throughout the year, while significant seasonal variations were recorded for dissolved oxygen, salinity, and temperature. Concentrations of mineral elements, notably nitrates, phosphates, and ammonium, also showed fairly marked seasonal fluctuations. These elements are below the environmental standards for water quality set by international bodies. The results of this study demonstrate that the waters of the Sangomar MPA are of good quality overall. The study will provide a reference point for future assessments of the impact of oil exploitation activities on the Sangomar MPA.

Key words: Marine protected area, Sangomar, physico-chemical parameters, oil field.