Remote alpine lakes and microplastic contamination: Insights from sediment analysis of lake cadagno

Microplastic (MP) contamination has become a growing concern in environmental research, with significant attention focused on its presence in various ecosystems worldwide. While much research has centered on major lakes and water bodies, remote alpine lakes remain relatively unexplored in terms of microplastic contamination. This study investigates microplastic presence in the sediment of Lake Cadagno, a remote alpine meromictic lake situated in the Piora valley of southern central Switzerland. Through sediment core sampling and analysis, we aim to identify sources and deposition trends of microplastics in this pristine alpine environment. Our findings reveal a discernible level of microplastic contamination within Lake Cadagno, predominantly attributed to localized sources associated with nearby human activities. The absence of systemic fibers and limited polymer types detected suggest minimal contribution from atmospheric deposition, reinforcing the significance of local anthropogenic influences. Spatial clustering of microplastic particles near potential sources underscores the impact of surrounding land use activities on microplastic distribution. Overall, this study highlights the importance of addressing microplastic contamination even in remote and seemingly pristine ecosystems like Lake Cadagno, to elucidate the need for strict adherence with waste management and correct disposal actions to reduce the harmful impacts of microplastic contamination. Also see: https://micro2024.sciencesconf.org/559343/document