Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba)
The discarding of plastic products has led to the ubiquitous occurrence of microplastic particles in the marine environment. The uptake and depuration kinetics of ingested microplastics for many marine species still remain unknown despite its importance for understanding bioaccumulation potential to...
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Language: | English |
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American Chemical Society
2018
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Online Access: | https://doi.org/10.1021/acs.est.7b05759 |
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ftunivscoast:usc:26794 2023-05-15T13:49:06+02:00 Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy A Nash, Susan Bengtson 2018 https://doi.org/10.1021/acs.est.7b05759 eng eng American Chemical Society usc:26794 URN:ISSN: 0013-936X FoR multidisciplinary Journal Article 2018 ftunivscoast https://doi.org/10.1021/acs.est.7b05759 2018-08-27T22:24:43Z The discarding of plastic products has led to the ubiquitous occurrence of microplastic particles in the marine environment. The uptake and depuration kinetics of ingested microplastics for many marine species still remain unknown despite its importance for understanding bioaccumulation potential to higher trophic level consumers. In this study, Antarctic krill (Euphausia superba) were exposed to polyethylene microplastics to quantify acute toxicity and ingestion kinetics, providing insight into the bioaccumulation potential of microplastics at the first-order consumer level. In the 10 day acute toxicity assay, no mortality or dose-dependent weight loss occurred in exposed krill, at any of the exposure concentrations (0, 10, 20, 40, or 80% plastic diet). Krill exposed to a 20% plastic diet for 24 h displayed fast uptake (22 ng mg–1 h–1) and depuration (0.22 h–1) rates, but plastic uptake did not reach steady state. Efficient elimination also resulted in no bioaccumulation over an extended 25 day assay, with most individuals completely eliminating their microplastic burden in less than 5 days post exposure. Our results support recent findings of limited acute toxicity of ingested microplastics at this trophic level, and suggest sublethal chronic end points should be the focus of further ecotoxicological investigation. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba University of the Sunshine Coast, Queensland, Australia: COAST Research Database Antarctic Environmental Science & Technology 52 5 3195 3201 |
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University of the Sunshine Coast, Queensland, Australia: COAST Research Database |
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ftunivscoast |
language |
English |
topic |
FoR multidisciplinary |
spellingShingle |
FoR multidisciplinary Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy A Nash, Susan Bengtson Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
topic_facet |
FoR multidisciplinary |
description |
The discarding of plastic products has led to the ubiquitous occurrence of microplastic particles in the marine environment. The uptake and depuration kinetics of ingested microplastics for many marine species still remain unknown despite its importance for understanding bioaccumulation potential to higher trophic level consumers. In this study, Antarctic krill (Euphausia superba) were exposed to polyethylene microplastics to quantify acute toxicity and ingestion kinetics, providing insight into the bioaccumulation potential of microplastics at the first-order consumer level. In the 10 day acute toxicity assay, no mortality or dose-dependent weight loss occurred in exposed krill, at any of the exposure concentrations (0, 10, 20, 40, or 80% plastic diet). Krill exposed to a 20% plastic diet for 24 h displayed fast uptake (22 ng mg–1 h–1) and depuration (0.22 h–1) rates, but plastic uptake did not reach steady state. Efficient elimination also resulted in no bioaccumulation over an extended 25 day assay, with most individuals completely eliminating their microplastic burden in less than 5 days post exposure. Our results support recent findings of limited acute toxicity of ingested microplastics at this trophic level, and suggest sublethal chronic end points should be the focus of further ecotoxicological investigation. |
format |
Article in Journal/Newspaper |
author |
Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy A Nash, Susan Bengtson |
author_facet |
Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy A Nash, Susan Bengtson |
author_sort |
Dawson, Amanda |
title |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
title_short |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
title_full |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
title_fullStr |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
title_full_unstemmed |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill (Euphausia superba) |
title_sort |
uptake and depuration kinetics influence microplastic bioaccumulation and toxicity in antarctic krill (euphausia superba) |
publisher |
American Chemical Society |
publishDate |
2018 |
url |
https://doi.org/10.1021/acs.est.7b05759 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
usc:26794 URN:ISSN: 0013-936X |
op_doi |
https://doi.org/10.1021/acs.est.7b05759 |
container_title |
Environmental Science & Technology |
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52 |
container_issue |
5 |
container_start_page |
3195 |
op_container_end_page |
3201 |
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1766250823994572800 |