The National Park Service and the National Marine Fisheries Service are cooperating to provide a quantitative assessment of national, regional, and seasonal trends in marine debris abundance, composition, and accumulation on beaches of the National Park System. Quarterly surveys on 36 beaches at 7 national parks recorded a total of 113,722 debris items in 1989-90. The majority of debris was plastics (88%) and consisted mostly of fragments. No seasonal differences in the overall composition of plastic debris were evident. Plastic items that could be ingested by marine animals were nearly 16 times as abundant as items posing entanglement hazards. Glass was the most abundant nonplastic debris category; medical debris was found in very low numbers (only 166 items). Survey results in 1989-90 were similar to those observed last year. Weather, beach characteristics, nearshore and offshore currents, and proximity to urban and fishing centers, ports, shipping lanes, and military installations influenced the observed patterns.


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    Titel :

    Annual Report of the National Park Marine Debris Monitoring Program: 1990 Marine Debris Surveys


    Beteiligte:
    D. A. Manski (Autor:in) / W. P. Gregg (Autor:in) / C. A. Cole (Autor:in) / D. V. Richards (Autor:in)

    Erscheinungsdatum :

    1991


    Format / Umfang :

    46 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch