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      A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon

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          Abstract

          In U.S. Pacific Northwest coho salmon ( Oncorhynchus kisutch), stormwater exposure annually causes unexplained acute mortality when adult salmon migrate to urban creeks to reproduce. By investigating this phenomenon, we identified a highly toxic quinone transformation product of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine) (6PPD), a globally ubiquitous tire rubber antioxidant. Retrospective analysis of representative roadway runoff and stormwater-impacted creeks of the U.S. West Coast indicated widespread occurrence of 6PPD-quinone (<0.3-19 μg/L) at toxic concentrations (LC 50 of 0.8 ± 0.16 μg/L). These results reveal unanticipated risks of 6PPD antioxidants to an aquatic species and imply toxicological relevance for dissipated tire rubber residues.

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          Journal
          Science
          Science
          American Association for the Advancement of Science (AAAS)
          0036-8075
          1095-9203
          December 03 2020
          : eabd6951
          Affiliations
          [1 ]Center for Urban Waters, Tacoma, WA 98421, USA.
          [2 ]Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, WA 98421, USA.
          [3 ]Department of Civil and Environmental Engineering, University of Washington, Seattle, WA 98195, USA.
          [4 ]School of the Environment, Washington State University, Puyallup, WA 98371, USA.
          [5 ]Department of Chemistry, University of Toronto, Scarborough Campus, 1265 Military Trail, Toronto, ON M1C1A4, Canada.
          [6 ]Southern California Coastal Water Research Project, Costa Mesa, CA 92626, USA.
          [7 ]San Francisco Estuary Institute, 4911 Central Avenue, Richmond, CA 94804, USA.
          [8 ]Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, Seattle, WA 98112, USA.
          [9 ]United States Fish and Wildlife Service, Washington Fish and Wildlife Office, Lacey, WA 98503, USA.
          Article
          10.1126/science.abd6951
          33273063
          a511d56d-10a3-42fb-bc10-0efee772552b
          © 2020
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