Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels

Walkinshaw, Chris, Tolhurst, Trevor J. ORCID: https://orcid.org/0000-0002-8578-7580, Lindeque, Penelope K., Thompson, Richard C. and Cole, Matthew (2023) Impact of polyester and cotton microfibers on growth and sublethal biomarkers in juvenile mussels. Microplastics and Nanoplastics, 3.

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Abstract

Anthropogenic microfibres are a prevalent, persistent and globally distributed form of marine debris. Evidence of microfibre ingestion has been demonstrated in a range of organisms, including Mytilus spp. (mussels), but the extent of any impacts on these organisms are poorly understood. This study investigates, for the first time, the effect of exposing juvenile mussels to polyester and cotton microfibres at environmentally relevant concentrations (both current and predicted future scenarios) over a chronic timescale (94 days). Sublethal biomarkers included growth rate, respiration rate and clearance rate. Mussels were exposed to polyester (median length 149 µm) and cotton (median length 132 µm) microfibres in three treatments: polyester (~ 8 fibres L−1), polyester (~ 80 fibres L−1) and cotton (~ 80 fibres L−1). Mussels exposed to 80 polyester or cotton microfibres L−1 exhibited a decrease in growth rate of 35.6% (polyester) and 18.7% (cotton), with mussels exposed to ~ 80 polyester microfibres L−1 having a significantly lower growth rate than the control population (P < 0.05). This study demonstrates that polyester microfibres have the potential to adversely impact upon mussel growth rates in realistic future scenarios, which may have compounding effects throughout the marine ecosystem and implications for commercial viability.

Item Type:	Article
Additional Information:	Funding information: CW was funded by the Natural Environment Research Council through the EnvEast Doctoral Training Partnership (grant number NE/L002582/1). MC and PL were funded by the March Marine Initiative.
Uncontrolled Keywords:	sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
Faculty \ School:	Faculty of Science > School of Environmental Sciences
UEA Research Groups:	Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Depositing User:	LivePure Connector
Date Deposited:	01 Mar 2023 12:31
Last Modified:	31 Jul 2023 07:09
URI:	https://ueaeprints.uea.ac.uk/id/eprint/91312
DOI:	10.1186/s43591-023-00052-8

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