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• W4309476099 endingPage "160308" @default.
• W4309476099 startingPage "160308" @default.
• W4309476099 abstract "Microplastics (<5 mm) are well documented across shorelines worldwide; however, high variability in microplastic abundance is often observed within and among field studies. The majority of microplastic surveys to date consist of single sampling events that do not consider spatiotemporal variability as a potential confounding factor in the interpretation of their results. Therefore, these surveys may not accurately capture or reflect levels of microplastic contamination in the environment. Here, we provide the first investigation of small-scale spatial and temporal variability of microplastic abundance, distribution, and composition in the intertidal zone of an urbanized US estuary to better understand the short-term, daily spatiotemporal variability of microplastics in dynamic coastal environments. Intertidal sediment was collected from both the low and high intertidal zones of a sandy estuarine beach located in South Carolina, southeastern US every 1 to 2 days at low tide over 17 days (12 sampling events; total n = 72). Study-wide, microplastic abundance ranged from 44 to 912 microplastics/m2 and consisted primarily of polyethylene, nylon, polyester, and tire (or tyre) wear particles. High temporal variability was observed, with microplastic abundance differing significantly among sampling events (p = 0.00025), as well as among some consecutive tidal cycles occurring within 12 h of each other (p = 0.007). By contrast, low spatial variability was observed throughout the study with no significant differences in microplastic abundance detected between the low and high intertidal zones (p = 0.76). Of the environmental factors investigated, wind direction on the day of sampling had the greatest effect on temporal microplastic variability. Our results demonstrate that there can be significant temporal variability of microplastic abundance in estuarine intertidal sediments and are important for informing the methods and interpretation of future microplastic surveys in dynamic coastal environments worldwide." @default.
• W4309476099 created "2022-11-28" @default.
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• W4309476099 date "2023-02-01" @default.
• W4309476099 modified "2023-10-01" @default.
• W4309476099 title "Spatial and temporal variability of microplastic abundance in estuarine intertidal sediments: Implications for sampling frequency" @default.
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• W4309476099 doi "https://doi.org/10.1016/j.scitotenv.2022.160308" @default.
• W4309476099 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36403830" @default.
• W4309476099 hasPublicationYear "2023" @default.
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