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Marine litter colonization: Methodological challenges and recommendations
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This review identifies methodological challenges in studying marine litter colonization by invertebrates, including variability in experimental design, species identification methods, and colonization metrics, and provides recommendations to improve comparability across studies of plastic as a dispersal vector for potentially invasive species.
Marine litter colonization by marine invertebrate species is a major global concern resulting in the dispersal of potentially invasive species has been widely reported. However, there are still several methodological challenges and uncertainties in this field of research. In this review, literature related to field studies on marine litter colonization was compiled and analyzed. A general overview of the current knowledge is presented. Major challenges and knowledge gaps were also identified, specifically concerning: 1) uncertainties in species identification, 2) lack of standardized sampling methodologies, 3) inconsistencies with the data reported, and 4) insufficient chemical-analytical approaches to understand this phenomenon. Aiming to serve as a guide for future studies, several recommendations are provided for each point, particularly considering the inaccessibility to advanced techniques and laboratories.
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Researchers reviewed how marine litter interacts with sandy beach fauna, including entanglement, ingestion, and habitat effects. The review found that microplastic ingestion by beach invertebrates correlates with urbanization levels and sediment pollution, and that current research approaches have limitations in connecting laboratory exposure studies with real-world field conditions.
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