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Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell
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Plastic debris in Mediterranean seabirds.

Marina Codina-García, Teresa Militão, Javier Moreno

    Marine Pollution Bulletin
    |January 23, 2014
    PubMed
    Summary

    Marine seabirds in the Mediterranean are ingesting significant amounts of plastic debris. Three endemic shearwater species show particularly high exposure to plastic accumulation, posing a threat to their populations.

    Area of Science:

    • Marine Biology
    • Environmental Science
    • Conservation Biology

    Background:

    • Plastic debris is a pervasive marine pollutant.
    • Ingestion of plastics can lead to severe health issues and mortality in marine wildlife.
    • Seabirds are particularly vulnerable due to their feeding habits and ecological niche.

    Purpose of the Study:

    • To conduct the first assessment of plastic ingestion in Mediterranean seabirds.
    • To quantify and analyze plastic debris found in the stomachs of various seabird species.
    • To identify species most affected by plastic pollution in the Mediterranean ecosystem.

    Main Methods:

    • Analysis of stomach contents from 171 seabirds across 9 species.
    • Birds were incidentally caught by longliners in the western Mediterranean between 2003 and 2010.

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  • Quantification and measurement of ingested plastic particles by mass and number.

    • Main Results:

    • High occurrence of plastic ingestion detected in multiple seabird species.
    • Cory's shearwaters exhibited the highest ingestion rate (94%) with an average of 15.3 plastic particles.
    • Yelkouan and Balearic shearwaters also showed significant plastic ingestion (70%), with endemic and threatened species being particularly exposed.

    Conclusions:

    • The study highlights the significant threat of plastic pollution to Mediterranean seabird populations.
    • Endemic and threatened shearwater species are disproportionately affected by plastic ingestion.
    • Urgent conservation strategies are needed to mitigate plastic pollution impacts on marine predators.