Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics

Weathering of plastics leads to the formation of increasingly smaller particles with the release of chemical compounds. The latter occurs with currently unknown environmental impacts. Leachate-induced effects of weathered microplastics (MPs) are therefore of increasing concern. To investigate the to...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kristina Klein, Sebastian Heß, Ulrike Schulte-Oehlmann, Jörg Oehlmann
Formato:	article
Lenguaje:	EN
Publicado:	PeerJ Inc. 2021
Materias:	Microplastic Weathering Freshwater shrimp Locomotion Toxicity Behavioral assay Medicine R
Acceso en línea:	https://doaj.org/article/3d5a8b4839af44adb4374e252a9c6699
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3d5a8b4839af44adb4374e252a9c6699
record_format	dspace
spelling	oai:doaj.org-article:3d5a8b4839af44adb4374e252a9c66992021-11-11T15:05:50ZLocomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics10.7717/peerj.124422167-8359https://doaj.org/article/3d5a8b4839af44adb4374e252a9c66992021-11-01T00:00:00Zhttps://peerj.com/articles/12442.pdfhttps://peerj.com/articles/12442/https://doaj.org/toc/2167-8359Weathering of plastics leads to the formation of increasingly smaller particles with the release of chemical compounds. The latter occurs with currently unknown environmental impacts. Leachate-induced effects of weathered microplastics (MPs) are therefore of increasing concern. To investigate the toxicity of the chemical mixtures from such plastics, we exposed the freshwater shrimp Neocaridina palmata to enriched leachates from unweathered and artificially weathered (UV-A/B light) MPs (≤1 mm) from recycled low-density polyethylene (LDPE-R) pellets and from a biodegradable, not fully bio-based starch blend (SB) foil. We analyzed the individual locomotor activity (moved distance and frozen events) on day 1, 3, 7 and 14 of exposure to five leachate concentrations equivalent to 0.40–15.6 g MPs L−1, representing the upper scale of MPs that have been found in the environment. The median moved distance did not change as a function of concentration, except for the unweathered SB treatment on day 14 that indicated hyperactivity with increasing concentrations. Significant impacts were solely detected for few concentrations and exposure days. Generally, no consistent trend was observed across the experiments. We further assessed the baseline toxicity of the samples in the Microtox assay and detected high bioluminescence inhibitions of the bacterium Aliivibrio fischeri. This study demonstrates that neither the recycled nor the biodegradable material are without impacts on test parameters and therefore cannot be seen as safe alternative for conventional plastics regarding the toxicity. However, the observed in vitro toxicity did not result in substantial effects on the behavior of shrimps. Overall, we assume that the two endpoints examined in the atyid shrimp N. palmata were not sensitive to chemicals leaching from plastics or that effects on the in vivo level affect other toxic endpoints which were not considered in this study.Kristina KleinSebastian HeßUlrike Schulte-OehlmannJörg OehlmannPeerJ Inc.articleMicroplasticWeatheringFreshwater shrimpLocomotionToxicityBehavioral assayMedicineRENPeerJ, Vol 9, p e12442 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microplastic Weathering Freshwater shrimp Locomotion Toxicity Behavioral assay Medicine R
spellingShingle	Microplastic Weathering Freshwater shrimp Locomotion Toxicity Behavioral assay Medicine R Kristina Klein Sebastian Heß Ulrike Schulte-Oehlmann Jörg Oehlmann Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
description	Weathering of plastics leads to the formation of increasingly smaller particles with the release of chemical compounds. The latter occurs with currently unknown environmental impacts. Leachate-induced effects of weathered microplastics (MPs) are therefore of increasing concern. To investigate the toxicity of the chemical mixtures from such plastics, we exposed the freshwater shrimp Neocaridina palmata to enriched leachates from unweathered and artificially weathered (UV-A/B light) MPs (≤1 mm) from recycled low-density polyethylene (LDPE-R) pellets and from a biodegradable, not fully bio-based starch blend (SB) foil. We analyzed the individual locomotor activity (moved distance and frozen events) on day 1, 3, 7 and 14 of exposure to five leachate concentrations equivalent to 0.40–15.6 g MPs L−1, representing the upper scale of MPs that have been found in the environment. The median moved distance did not change as a function of concentration, except for the unweathered SB treatment on day 14 that indicated hyperactivity with increasing concentrations. Significant impacts were solely detected for few concentrations and exposure days. Generally, no consistent trend was observed across the experiments. We further assessed the baseline toxicity of the samples in the Microtox assay and detected high bioluminescence inhibitions of the bacterium Aliivibrio fischeri. This study demonstrates that neither the recycled nor the biodegradable material are without impacts on test parameters and therefore cannot be seen as safe alternative for conventional plastics regarding the toxicity. However, the observed in vitro toxicity did not result in substantial effects on the behavior of shrimps. Overall, we assume that the two endpoints examined in the atyid shrimp N. palmata were not sensitive to chemicals leaching from plastics or that effects on the in vivo level affect other toxic endpoints which were not considered in this study.
format	article
author	Kristina Klein Sebastian Heß Ulrike Schulte-Oehlmann Jörg Oehlmann
author_facet	Kristina Klein Sebastian Heß Ulrike Schulte-Oehlmann Jörg Oehlmann
author_sort	Kristina Klein
title	Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
title_short	Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
title_full	Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
title_fullStr	Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
title_full_unstemmed	Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics
title_sort	locomotor behavior of neocaridina palmata: a study with leachates from uv-weathered microplastics
publisher	PeerJ Inc.
publishDate	2021
url	https://doaj.org/article/3d5a8b4839af44adb4374e252a9c6699
work_keys_str_mv	AT kristinaklein locomotorbehaviorofneocaridinapalmataastudywithleachatesfromuvweatheredmicroplastics AT sebastianheß locomotorbehaviorofneocaridinapalmataastudywithleachatesfromuvweatheredmicroplastics AT ulrikeschulteoehlmann locomotorbehaviorofneocaridinapalmataastudywithleachatesfromuvweatheredmicroplastics AT jorgoehlmann locomotorbehaviorofneocaridinapalmataastudywithleachatesfromuvweatheredmicroplastics
_version_	1718437124922933248

Locomotor behavior of Neocaridina palmata: a study with leachates from UV-weathered microplastics

Ejemplares similares