Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica

A comprehensive study reveals the widespread presence of microplastics (MPs) in both marine and freshwater environments of Cocos Island National Park, Costa Rica. MPs were detected in 93% of marine sediments, 20% of marine fish, and 51% of marine lobsters, with ocean currents, tourism, and illegal fishing gear identified as primary sources. Unexpectedly, MPs were also found in freshwater environments, including 32% of freshwater sediments, 20% of freshwater fish, and 15% of freshwater shrimps, though their origins remain unclear. The study employed a multi-faceted sampling approach, collecting sediment samples and biota from both marine and freshwater habitats using nonselective nets, fishing rods, cages, and scuba diving techniques.

Astorga, A., Montero-Cordero, A., Golfin-Duarte, G., García-Rojas, A., Vega-Bolaños, H., Arias-Zumbado, F., Solís-Adolio, D., & Ulate, K. (2022). Microplastics found in the World Heritage Site Cocos Island National Park, Costa Rica. Marine and Fishery Sciences (MAFIS), 35(3). https://doi.org/10.47193/mafis.3532022010907