title: Plastic in surface waters of the Inside Passage and beaches of the Salish Sea in Washington State.
abstract: We summarize results of two independent studies on plastic pollution in the marine environment that overlap in time and space. One study evaluated the abundance of anthropogenic debris on 37 sandy beaches bordering the Salish Sea in Washington State while the other characterized plastic debris in surface waters of the Salish Sea and the Inside Passage to Skagway, Alaska. Both studies concluded that foam, primarily expanded polystyrene was the dominant pollutant. Plastic was found in surface waters the full length of the Inside Passage but was concentrated near harbors. At the wrack line, an average square meter of Washington's 1180km of sandy beaches in the Salish Sea had 61 pieces of anthropogenic debris weighing approximately 5g. The total loading for the entire 1m wide band is estimated to be 72,000,000 pieces and 5.8metric tons. Most anthropogenic debris on beaches is generated within the region.
authors.affiliation: Retired Director of Quality, Leviton Manufacturing, United States. Electronic address: wallydavis3@gmail.com.
authors.forename: Wallace
authors.initials: W
authors.lastname: Davis
authors.affiliation: Retired Director, Port Townsend Marine Science Center, United States.
authors.forename: Anne G
authors.initials: AG
authors.lastname: Murphy
mesh_terms: D000413:Alaska; D004784:Environmental Monitoring / Q000379:methods*; D009792:Oceans and Seas; D010969:Plastics / Q000032:analysis*; D014861:Washington; D014866:Waste Products / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D010969:Plastics; D014866:Waste Products; D014874:Water Pollutants, Chemical
keywords: Citizen science; Inside Passage; Microplastic; Salish Sea; Sandy beaches; Surface water