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Methodological similarities and discrepancies among studies on microplastics in South American continental aquatic environments
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Researchers conducted a systematic review of 57 studies on microplastic pollution in South American continental aquatic environments, identifying significant methodological discrepancies in sampling, detection limits, and sample preparation that limit cross-study comparability and proposing standardization approaches.
We analyzed methodological similarities and discrepancies regarding microplastics (MPs) pollution studies in South American continental aquatic environments (lotic and lentic systems). A systematic search up to October 2024 on ScienceDirect, Scopus, Web of Science, and Scielo returned 57 papers, the first being published in 2017. Papers from Brazil were the most frequent, particularly in the Amazon region. Methodological discrepancies, especially in sampling, detection limits and sample preparation, limit data comparability and impact progress toward understanding MPs' environmental impact. Harmonizing methodologies and broadening geographic coverage are crucial. Recommendations include regional collaboration, integrated studies, and enhanced analytical approaches to improve environmental diagnostics and support policy development for plastic pollution management.
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