Long-term exposure to nanoplastics reduces life-time in Daphnia magna

Abstract Plastics are widely used in todays society leading to an accelerating amount of plastic waste entering natural ecosystems. Over time these waste products degrade to micro- and, eventually, nanoplastic particles. Therefore, the break-down of plastics may become a critical threat to aquatic e...

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Autores principales:	Egle Kelpsiene, Oscar Torstensson, Mikael T. Ekvall, Lars-Anders Hansson, Tommy Cedervall
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ade9d18200134334ae5556a819be8257
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spelling	oai:doaj.org-article:ade9d18200134334ae5556a819be82572021-12-02T18:15:09ZLong-term exposure to nanoplastics reduces life-time in Daphnia magna10.1038/s41598-020-63028-12045-2322https://doaj.org/article/ade9d18200134334ae5556a819be82572020-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-63028-1https://doaj.org/toc/2045-2322Abstract Plastics are widely used in todays society leading to an accelerating amount of plastic waste entering natural ecosystems. Over time these waste products degrade to micro- and, eventually, nanoplastic particles. Therefore, the break-down of plastics may become a critical threat to aquatic ecosystems and several short term studies have demonstrated acute toxicity of nanoplastics on aquatic organisms. However, our knowledge about effects of chronic or life-time exposure on freshwater invertebrates remains elusive. Here, we demonstrate results from life-time exposure (103 days) of a common freshwater invertebrate, Daphnia magna, exposed to sub-lethal concentrations of polystyrene nanoparticles. 53 nm positively charged aminated polystyrene particles were lethal at concentration of 0.32 mg/L which is two magnitudes lower than previously used concentrations in short-term (24 h) tests. At this concentration the life-time of individuals was shortened almost three times. Negatively charged carboxylated 26 and 62 nm polystyrene particles, previously demonstrated to be non-toxic at 25 and 50 mg/L concentrations in short-term tests, were toxic to D. magna at all concentrations used in our long-term study. Although total reproductive output was not significantly affected at increasing concentrations of polystyrene nanoparticles, there was a decreasing trend in the number of offspring over their life-time. Hence, in order to understand how the potential future environmental problem of nanoplastic particles may affect biota, long-term or life-time studies resembling environmental concentrations should be performed in order to provide information for predictions of future scenarios in natural aquatic environments.Egle KelpsieneOscar TorstenssonMikael T. EkvallLars-Anders HanssonTommy CedervallNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-7 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Egle Kelpsiene Oscar Torstensson Mikael T. Ekvall Lars-Anders Hansson Tommy Cedervall Long-term exposure to nanoplastics reduces life-time in Daphnia magna
description	Abstract Plastics are widely used in todays society leading to an accelerating amount of plastic waste entering natural ecosystems. Over time these waste products degrade to micro- and, eventually, nanoplastic particles. Therefore, the break-down of plastics may become a critical threat to aquatic ecosystems and several short term studies have demonstrated acute toxicity of nanoplastics on aquatic organisms. However, our knowledge about effects of chronic or life-time exposure on freshwater invertebrates remains elusive. Here, we demonstrate results from life-time exposure (103 days) of a common freshwater invertebrate, Daphnia magna, exposed to sub-lethal concentrations of polystyrene nanoparticles. 53 nm positively charged aminated polystyrene particles were lethal at concentration of 0.32 mg/L which is two magnitudes lower than previously used concentrations in short-term (24 h) tests. At this concentration the life-time of individuals was shortened almost three times. Negatively charged carboxylated 26 and 62 nm polystyrene particles, previously demonstrated to be non-toxic at 25 and 50 mg/L concentrations in short-term tests, were toxic to D. magna at all concentrations used in our long-term study. Although total reproductive output was not significantly affected at increasing concentrations of polystyrene nanoparticles, there was a decreasing trend in the number of offspring over their life-time. Hence, in order to understand how the potential future environmental problem of nanoplastic particles may affect biota, long-term or life-time studies resembling environmental concentrations should be performed in order to provide information for predictions of future scenarios in natural aquatic environments.
format	article
author	Egle Kelpsiene Oscar Torstensson Mikael T. Ekvall Lars-Anders Hansson Tommy Cedervall
author_facet	Egle Kelpsiene Oscar Torstensson Mikael T. Ekvall Lars-Anders Hansson Tommy Cedervall
author_sort	Egle Kelpsiene
title	Long-term exposure to nanoplastics reduces life-time in Daphnia magna
title_short	Long-term exposure to nanoplastics reduces life-time in Daphnia magna
title_full	Long-term exposure to nanoplastics reduces life-time in Daphnia magna
title_fullStr	Long-term exposure to nanoplastics reduces life-time in Daphnia magna
title_full_unstemmed	Long-term exposure to nanoplastics reduces life-time in Daphnia magna
title_sort	long-term exposure to nanoplastics reduces life-time in daphnia magna
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/ade9d18200134334ae5556a819be8257
work_keys_str_mv	AT eglekelpsiene longtermexposuretonanoplasticsreduceslifetimeindaphniamagna AT oscartorstensson longtermexposuretonanoplasticsreduceslifetimeindaphniamagna AT mikaeltekvall longtermexposuretonanoplasticsreduceslifetimeindaphniamagna AT larsandershansson longtermexposuretonanoplasticsreduceslifetimeindaphniamagna AT tommycedervall longtermexposuretonanoplasticsreduceslifetimeindaphniamagna
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Long-term exposure to nanoplastics reduces life-time in Daphnia magna

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