The Effects of Microplastics on the Human Food Chain and Freshwater Ecosystem

Microplastic pollution over the past decades has become a significant environmental concern, with its widespread occurrence in freshwater ecosystems posing risks to both ecological systems and human health. This chapter aims to provide a comprehensive acknowledgment on the impacts of microplastics as contaminants in the world’s freshwater ecosystems and their potential entry into the human food chain. The chapter explores the sources and distribution of microplastics in freshwater systems, highlighting the contribution of anthropogenic activities such as urban runoff and industrial discharges. It examines the ecological impacts of microplastic contamination on freshwater organisms, emphasizing the effects on phytoplankton, zooplankton, benthic invertebrates, and fish. Additionally, the broader ecological consequences of microplastic pollution, including disruptions to nutrient cycling and ecosystem structure, are investigated. The chapter further delves into the potential risks of microplastics entering the human food chain through freshwater ecosystems and explores exposure pathways. The human health implications of microplastic exposure are reviewed, considering potential long-term effects on human health. The chapter also discusses analytical methods for microplastic detection in freshwater systems and human tissues. Mitigation strategies to reduce microplastic contamination and policy implications are examined. Finally, future studies are diverted to address the knowledge gaps in this field. This chapter underscores the urgency of understanding the ecological and human health risks associated with microplastic pollution, providing valuable insights for environmental management and policy development.