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Plastics and other anthropogenic debris in freshwater birds from Canada.
Summary
This study quantified plastic debris ingestion in 17 freshwater and one marine bird species across Canada, finding that over 11% of individuals had ingested anthropogenic debris. The results show that plastic pollution in freshwater environments affects birds at rates comparable to marine species, highlighting the need to extend plastic pollution monitoring beyond the ocean.
Plastics in marine environments are a global environmental issue. Plastic ingestion is associated with a variety of deleterious health effects in marine wildlife, and is a focus of much international research and monitoring. However, little research has focused on ramifications of plastic debris for freshwater organisms, despite marine and freshwater environments often having comparable plastic concentrations. We quantified plastic and other anthropogenic debris in 350 individuals of 17 freshwater and one marine bird species collected across Canada. We determined freshwater birds' anthropogenic debris ingestion rates to be 11.1% across all species studied. This work establishes that plastics and other anthropogenic debris are a genuine concern for management of the health of freshwater ecosystems, and provides a baseline for the prevalence of plastic and other anthropogenic debris ingestion in freshwater birds in Canada, with relevance for many other locations.