Environmental & Analytical Toxicology

John P Giesy

Publications

• Research Article
  Assessment of Columbia River Sediment Toxicity to White Sturgeon: Concentrations of Metals in Sediment, Pore Water and Overlying Water
  Author(s): David W Vardy, Jon A Doering, Robert Santore, Adam Ryan, John P Giesy and Markus HeckerDavid W Vardy, Jon A Doering, Robert Santore, Adam Ryan, John P Giesy and Markus Hecker
  
  Concentrations of copper, lead and zinc in sediments downstream of a metallurgical facility on the the Upper Columbia River (UCR) were significantly greater than those in regional reference locations. Sturgeons inhabit benthic habitats and there is concern that they might be at greater risk of exposure. A laboratory based, flow-through, experimental exposure system was used to characterize toxicity of metals in the different matrices associated with sediments collected from the UCR, and to assess risk to early life stages of white sturgeon (Acipenser transmontanus) under chronic bioassay conditions. Bioavailability and concentrations of metals in pore water, overlying water, and at the sediment-water interface were characterized. Several sampling methods including peepers, diffusive gradients in thin films (DGTs), and active sampling/suction techniques were employed. Results indicated.. Read More»
  DOI: 10.4172/2161-0525.1000263

  Abstract PDF