Environmental Contaminants in Biota

Dr. W. Nelson Beyer is an ecotoxicologist at the Patuxent Wildlife Research Center, in the U.S. Geological Survey. He earned a doctorate in terrestrial ecology from Cornell University in 1976, studying the natural history of slugs, and remains curious about all manner of living things. With help from colleagues in the U.S. Fish and Wildlife Service, he has examined contaminated sites, studying phytotoxic injury to the chestnut oak forest adjacent to the Palmerton zinc smelters in Pennsylvania, lead poisoning of swans and other waterfowl in the Coeur d’Alene River Basin in Idaho, and zinc poisoning of wild birds at the Tri-State Mining District in Oklahoma, Kansas, and Missouri. Many of his studies have documented the movement of environmental contaminants from soil and sediments into wildlife and through food chains, often showing how ingestion of soil or sediment is the most important route of exposure of lead and related metals to wildlife. Recently he has turned his eye toward sediment ingestion by bottom-feeding fish. He believes in using tissue residues as a means to emphasize injury to animals, basic to wildlife toxicology. His work is usually conducted to support Natural Resource Damage Assessments. He balances his down-to-earth approach to wildlife toxicology, however, with an inordinate fondness for clouds. His daily cycling inspires him, and his wife, Mary, keeps his laboratory running. Dr. James P. Meador is an environmental toxicologist with the National Marine Fisheries Service in Seattle, WA, U.S., which is part of the National Oceanic and Atmospheric Administration (NOAA). Jim has a Ph.D. in aquatic toxicology from the University of Washington and has more than 30 years experience in the field. He has been with NOAA for 20 years and has previously worked at the Scripps Institution of Oceanography and the Naval Oceans Systems Center in San Diego. For many years he has studied the environmental factors that control the bioavailability of contaminants and their role in bioaccumulation with the goal of developing relationships for predicting tissue concentrations, especially for aquatic species in the field. This work was supplemented with toxicokinetic studies that are useful for predicting bioaccumulation and highlighting species-specific differences in toxic responses. Gradually, these studies evolved to include analysis of toxic effects as a function of bioaccumulated tissue concentrations. In 2007, Jim organized and chaired a Pellston workshop, sponsored by the Society of Environmental Toxicology and Chemistry, to review the tissue residue approach for toxicity assessment. His current research is focused on alterations to growth and energetics in fish resulting from low-dose exposure to a variety of environmental contaminants. Jim has been married for 30 years to Susan, a recently retired NOAA statistician, who keeps him busy in the garden and serves as his buddy on their tropical-therapy SCUBA diving trips. He is also an avid bicycle rider/commuter and logs far more miles on his bike than on his car.

• DDT and Other Organohalogen Pesticides in Aquatic Organisms. Dioxins, PCBs, and PBDEs in Aquatic Organisms. Methylmercury in Freshwater Fish: Recent Advances in Assessing Toxicity of Environmentally Relevant Exposures . Selenium Accumulation and Toxicity in Freshwater Fishes, . Trace Metals in Aquatic Invertebrates. Organotins in Aquatic Biota: Occurrence in Tissue and Toxicological Significance. Active Pharmaceutical Ingredients and Aquatic Organisms. Organic Contaminants in Marine Mammals: Concepts in Exposure, Toxicity, and Management. Select Elements and Potential Adverse Effects in Cetaceans and Pinnipeds. Toxicological Significance of Pesticide Residues in Aquatic Animals. DDT, DDD, and DDE in Birds. Cyclodiene and Other Organochlorine Pesticides in Birds. Effects of in Wild Birds. Toxicological Implications of PCBs, PCDDs, and PCDFs in Mammals. Lead in Birds. Lead in Mammals. Mercury in Nonmarine Birds and Mammals. Cadmium in Small Mammals. Cadmium in Birds. Selenium in Birds. Radionuclides in Biota