Half the feces and regurgitated birds of prey, dippers in the river systems of South Wales discovered microplastics. According to the authors of the study, the results of which are published in the journal Global Change Biologyis one of the first evidence of the ability to transfer the micro-plastic in food chains in freshwater ecosystems.
Study of plastic pollution focused mainly on marine ecosystems. However, the basic way of receipt of the micro-plastic in the ocean is river flow, and scientists saythat pollution of freshwater ecosystems plastic particles have already reached a measurable level. They are found in coastal areas, the water column and sediments, and the most active of microplastics accumulate in the river benthos — the organisms living on the bottom or close to it.
Scientists under the leadership of Stephen Ormerod (Stephen J. Ormerod) from Cardiff University examined the migration of the micro-plastic in the food chain in the river systems of South Wales. They focused their attention on the common dipper (Cinclus cinclus) is a predatory bird that feeds on aquatic insects, crustaceans and small fish. Studying her feces, you can get a detailed idea of her diet, and the presence in it of the micro-plastic, and the composition of regurgitates (discarded lumps of half-digested food) — to establish the possibility of his transfer to the Chicks during feeding.