Maulana, R. M., Mulya, M. B., & Aththorick, T. A. (2025). The Condition of Coral Reefs Ecosystem in Poncan Gadang Island Sibolga City and Management Efforts. Journal of Environmental and Development Studies, 6(01), 026–033. https://doi.org/10.32734/jeds.v6i01.16759