PSU marine ecologist Elise Granek and a team of researchers studied Olympia oysters in both Netarts Bay and Coos Bay.
"Oysters are an indicator of the types and levels of contamination we see in the ocean," said Granek.
The Official Oregon State Policy to protect the public from contaminated shellfish is, "No Funds For Testing." The question is "Will the State Fund the testing of the shellfish in Oregon's Bay when no one can eat them?" Gee - are we already there?
The findings in Coos Bay are not surprising but they are in the oysters of Netarts Bay. I really have to wonder just how contaminated are the clams in Netarts. It is my understanding that the specter Mercury contamination in oysters is a topic State Agencies are avoiding. More World Class Leadership!!!?
• Spatio-temporal variability in contaminant deposition and uptake poorly known • Seasonal and spatial sampling of oysters (biosphere) for contaminants (anthroposphere) • Sediment (lithosphere) sampled to identify biota-sediment accumulation factors • Emerging and legacy contaminants varied spatially and by season (anthroposphere).
Chemical contaminants can be introduced into estuarine and marine ecosystems from a variety of sources including wastewater, agriculture and forestry practices, point and non-point discharges, runoff from industrial, municipal, and urban lands, accidental spills, and atmospheric deposition. The diversity of potential sources contributes to the likelihood of contaminated marine waters and sediments and increases the probability of uptake by marine organisms. Despite widespread recognition of direct and indirect pathways for contaminant deposition and organismal exposure in coastal systems, spatial and temporal variability in contaminant composition, deposition, and uptake patterns are still poorly known. We investigated these patterns for a suite of persistent legacy contaminants including polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) and chemicals of emerging concern including pharmaceuticals within two Oregon coastal estuaries (Coos and Netarts Bays). In the more urbanized Coos Bay, native Olympia oyster (Ostrea lurida) tissue had approximately twice the number of PCB congeners at over seven times the total concentration, yet fewer PBDEs at one-tenth the concentration as compared to the more rural Netarts Bay. Different pharmaceutical suites were detected during each sampling season. Variability in contaminant types and concentrations across seasons and between species and media (organisms versus sediment) indicates the limitation of using indicator species and/or sampling annually to determine contaminant loads at a site or for specific species. The results indicate the prevalence of legacy contaminants and CECs in relatively undeveloped coastal environments highlighting the need to improve policy and management actions to reduce contaminant releases into estuarine and marine waters and to deal with legacy compounds that remain long after prohibition of use. Our results point to the need for better understanding of the ecological and human health risks of exposure to the diverse cocktail of pollutants and harmful compounds that will continue to leach from estuarine sediments over time.