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Persistent Bioaccumulative and Toxic Contaminants in Puget Sound’s Pelagic Food Web

Persistent Bioaccumulative and Toxic Contaminants in Puget Sound’s Pelagic Food Web. James E. West, Jennifer H. Lanksbury , Puget Sound Assessment and Monitoring Program, Washington Department of Fish and Wildlife

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Persistent Bioaccumulative and Toxic Contaminants in Puget Sound’s Pelagic Food Web

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  1. Persistent Bioaccumulative and Toxic Contaminants in Puget Sound’s Pelagic Food Web James E. West, Jennifer H. Lanksbury , Puget Sound Assessment and Monitoring Program, Washington Department of Fish and Wildlife Sandra M. O’Neill, Gina M. Ylitalo, NOAA Fisheries, Northwest Fisheries Science Center, Seattle, WA

  2. Simplified pathway for PCBs entering and biomagnifying in the pelagic food web Source: Seattle Post-Intelligencer “The Zone” thezone@seattlepi.com

  3. We added three species/groups…… Primary producer Phytoplankton (POM) Pacific hake Primary consumer Krill (Euphausia pacifica) “resident” predators Pacific hake (Merluccius productus) and Walleye pollock (Theragra chaclogramma)

  4. Sampling for phytoplankton (particular organic matter, POM)

  5. Sampling for krill… … and hake

  6. Focus on three basins and one urban embayment

  7. Elliott Bay samples

  8. resident subadult Chinook 9 mo. in salt water

  9. Resident adults 2-3 yrs in salt water 9 mo. in salt water

  10. Results • Basin-specific bioaccumulation and magnification correlations • Urban influence in low-trophic-level of the pelagic food web • Three key factors highly correlated w/ PBTs • Residency (proximity to source) • exposure time • trophic level

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