Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill
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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American Chemical Society
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Online Access: | http://hdl.handle.net/10072/370879 https://doi.org/10.1021/acs.est.7b05759 |
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/370879 2023-05-15T13:43:49+02:00 Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy Bengtson Nash, Susan 2018 http://hdl.handle.net/10072/370879 https://doi.org/10.1021/acs.est.7b05759 English eng American Chemical Society Environmental Science & Technology Environmental Sciences not elsewhere classified Journal article 2018 ftgriffithuniv https://doi.org/10.1021/acs.est.7b05759 2018-07-30T11:03:51Z 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. Griffith Sciences, Griffith School of Environment No Full Text Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Griffith University: Griffith Research Online Antarctic Griffith ENVELOPE(-155.500,-155.500,-85.883,-85.883) Environmental Science & Technology 52 5 3195 3201 |
institution |
Open Polar |
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Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
topic |
Environmental Sciences not elsewhere classified |
spellingShingle |
Environmental Sciences not elsewhere classified Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy Bengtson Nash, Susan Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
topic_facet |
Environmental Sciences not elsewhere classified |
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. Griffith Sciences, Griffith School of Environment No Full Text |
format |
Article in Journal/Newspaper |
author |
Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy Bengtson Nash, Susan |
author_facet |
Dawson, Amanda Huston, Wilhelmina Kawaguchi, So King, Catherine Cropp, Roger Wild, Seanan Eisenmann, Pascale Townsend, Kathy Bengtson Nash, Susan |
author_sort |
Dawson, Amanda |
title |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
title_short |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
title_full |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
title_fullStr |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
title_full_unstemmed |
Uptake and Depuration Kinetics Influence Microplastic Bioaccumulation and Toxicity in Antarctic Krill |
title_sort |
uptake and depuration kinetics influence microplastic bioaccumulation and toxicity in antarctic krill |
publisher |
American Chemical Society |
publishDate |
2018 |
url |
http://hdl.handle.net/10072/370879 https://doi.org/10.1021/acs.est.7b05759 |
long_lat |
ENVELOPE(-155.500,-155.500,-85.883,-85.883) |
geographic |
Antarctic Griffith |
geographic_facet |
Antarctic Griffith |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_relation |
Environmental Science & Technology |
op_doi |
https://doi.org/10.1021/acs.est.7b05759 |
container_title |
Environmental Science & Technology |
container_volume |
52 |
container_issue |
5 |
container_start_page |
3195 |
op_container_end_page |
3201 |
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1766193773567541248 |