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• W3108443633 endingPage "143735" @default.
• W3108443633 startingPage "143735" @default.
• W3108443633 abstract "Multiple studies in freshwater environments have verified that microplastic particles are present in water columns, sediment, and aquatic organisms. These studies indicated that certain freshwater ecosystems may act as temporary sinks of microplastic particles, leading to accumulation in the sediment and the ingestion by benthic organisms. Polyethylene terephthalate (PET) is one of the non-buoyant polymers that has been frequently found in aquatic sediments. This study aims to investigate a possible transfer of PET microfibers from aquatic to the terrestrial habitats and addressed selected effects (i.e. survival, general stress response, and growth) of PET microfibers using Chironomus riparius, a frequently applied model organism in ecotoxicological research. To assess the growth and development of C. riparius, a modified 28-day sediment chronic toxicity test was conducted, in which the main endpoint is time until emergence of the larvae. In this assay, C. riparius were exposed to artificial sediments spiked with PET microfibers. In addition, weight and head capsule lengths of the larvae were also measured. As a general stress response marker on the molecular level, Heat Shock Protein 70 (HSP70) levels were measured in two involved life stages, i.e. larvae and adults. Using staining method, ingestion of PET microfibers was verified in the adult sample. Our results clearly demonstrated that ingested microfibers by C. riparius larvae can be carried through subsequent life stages and end up in the adults. Accordingly, this is the first proof of aquatic-terrestrial transfer of PET microfibers for C. riparius. However, toxicity test results showed that there was no significant effect on the time until emergence, weight or head capsule lengths in the organisms exposed to PET microfibers compared to control organisms. HSP70 measurements showed no significant effects between control and exposure groups in the same life stage. The result suggests that PET microfibers in the applied concentration do not exert adverse effects both on organism and subcellular level in one generation." @default.
• W3108443633 created "2020-12-07" @default.
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• W3108443633 date "2021-02-01" @default.
• W3108443633 modified "2023-10-13" @default.
• W3108443633 title "Transfer and effects of PET microfibers in Chironomus riparius" @default.
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• W3108443633 doi "https://doi.org/10.1016/j.scitotenv.2020.143735" @default.
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• W3108443633 hasPublicationYear "2021" @default.
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