Informing the Exposure Landscape: The Fate of Microplastics in a Large Pelagic In-Lake Mesocosm Experiment.

Autor:	Rochman CM; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Bucci K; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Langenfeld D; International Institute for Sustainable Development Experimental Lakes Area, Winnipeg, Manitoba R3B 0T4, Canada.; Department of Entomology, University of Manitoba, Winnipeg, Manitoba MB R3T 2N2, Canada., McNamee R; Biology Department, University of Waterloo, Waterloo, Ontario ON N2L 3G1, Canada., Veneruzzo C; Department of Biology, Lakehead University, Thunder Bay, Ontario ON P7B 5E1, Canada., Covernton GA; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Gao GHY; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Ghosh M; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Cable RN; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan 48109, United States., Hermabessiere L; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario M5S 3B2, Canada., Lazcano R; Department of Biology, Loyola University Chicago, Chicago, Illinois 60611, United States., Paterson MJ; International Institute for Sustainable Development Experimental Lakes Area, Winnipeg, Manitoba R3B 0T4, Canada.; Department of Entomology, University of Manitoba, Winnipeg, Manitoba MB R3T 2N2, Canada., Rennie MD; International Institute for Sustainable Development Experimental Lakes Area, Winnipeg, Manitoba R3B 0T4, Canada.; Department of Biology, Lakehead University, Thunder Bay, Ontario ON P7B 5E1, Canada., Rooney RC; Biology Department, University of Waterloo, Waterloo, Ontario ON N2L 3G1, Canada., Helm P; Environmental Monitoring and Reporting Branch, Ontario Ministry of the Environment, Conservation and Parks, 125 Resources Road, Toronto, Ontario M9P 3 V6, Canada., Duhaime MB; Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan 48109, United States., Hoellein T; Department of Biology, Loyola University Chicago, Chicago, Illinois 60611, United States., Jeffries KM; Department of Biological Sciences, University of Manitoba, Winnipeg, Manitoba MB R3T 2N2, Canada., Hoffman MJ; School of Mathematics and Statistics, Rochester Institute of Technology, Rochester, New York 14623, United States., Orihel DM; Department of Biology and School of Environmental Studies, Queen's University; Kingston, Ontario K7L 3N6, Canada., Provencher JF; Environment and Climate Change Canada, National Wildlife Research Centre, Ottawa K1A 0H3, Canada.
Jazyk:	angličtina
Zdroj:	Environmental science & technology [Environ Sci Technol] 2024 May 07; Vol. 58 (18), pp. 7998-8008. Date of Electronic Publication: 2024 Apr 17.
DOI:	10.1021/acs.est.3c08990
Abstrakt:	Understanding microplastic exposure and effects is critical to understanding risk. Here, we used large, in-lake closed-bottom mesocosms to investigate exposure and effects on pelagic freshwater ecosystems. This article provides details about the experimental design and results on the transport of microplastics and exposure to pelagic organisms. Our experiment included three polymers of microplastics (PE, PS, and PET) ranging in density and size. Nominal concentrations ranged from 0 to 29,240 microplastics per liter on a log scale. Mesocosms enclosed natural microbial, phytoplankton, and zooplankton communities and yellow perch ( Perca flavescens ). We quantified and characterized microplastics in the water column and in components of the food web (biofilm on the walls, zooplankton, and fish). The microplastics in the water stratified vertically according to size and density. After 10 weeks, about 1% of the microplastics added were in the water column, 0.4% attached to biofilm on the walls, 0.01% within zooplankton, and 0.0001% in fish. Visual observations suggest the remaining >98% were in a surface slick and on the bottom. Our study suggests organisms that feed at the surface and in the benthos are likely most at risk, and demonstrates the value of measuring exposure and transport to inform experimental designs and achieve target concentrations in different matrices within toxicity tests.
Databáze:	MEDLINE
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