Plastiskin: A new form of plastic pollution affecting rocky shore organisms.

Plastic pollution has become a significant environmental concern, with profound consequences for ecosystems worldwide, particularly for marine systems. Our study introduces 'plastiskin', a newly identified plastic pollution type encrusting intertidal organisms. Found on mussels and macroalgae, 'plastiskin' was composed of polypropylene and polyethylene. In mussels, the presence of 'plastiskin' was correlated with the absence of living endoliths in areas of the shells it covered, indicating a detrimental impact on the symbiotic endolithic community residing within mussel shells. In addition, we examined the potential negative effects of 'plastiskin' on the photosynthetic efficiency of macroalgae, however, these findings were inconclusive, stressing the need for further studies with larger sample sizes. Our baseline observations may serve as a groundwork for further investigation into the spatial distribution, temporal persistence, and ecological ramifications of 'plastiskin'. potential incorporation of 'plastiskin' as a new marine debris category into management and monitoring frameworks warrants serious consideration.

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Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.