Oklahoma State University	Department of Zoology

Joseph R. Bidwell Associate Professor Ph.D., 1993, Virginia Tech Email: bidwelj@okstate.edu Phone: 405-744-6941 Lab Webpage

(Aquatic Ecotoxicology, Benthic Invertebrates, Amphibians)

Specific Interests

My research examines the effects of contaminants on aquatic organisms across different levels of biological organization. For example, one of my current interests is the influence of contaminant stress on energy allocation in organisms. We are measuring parameters such as oxygen consumption, hatching time and growth in amphibian embryos and larvae in an attempt to develop an energetics-based model of effects. At the other end of the spectrum, I am interested in the response of macroinvertebrate communities to pollutant exposure. This includes the use of macroinvertebrates to develop indices of community integrity and the comparative response of invertebrates from different habitats/ecoregions.

Selected Publications

• Bidwell, J.R. and J.R. Gorrie. 2006. The influence of salinity on metal uptake and effects in the midge, Chironomus maddeni. Environmental Pollution, 139:206-213.
• Boeckman, C.J. and J.R. Bidwell. 2006. The effects of temperature, suspended solids and organic carbon on copper toxicity to two aquatic invertebrates. Water, Air and Soil Pollution, 171:185-202.
• Widder, P.D. and J.R. Bidwell. 2006. Cholinesterase Activity and Behavior in Chlorpyrifos-Exposed Rana sphenocephala Tadpoles. Environmental Toxicology and Chemistry, 2446-2454.
• Cherry, D.S., J.L. Scheller, N.L. Cooper and J.R. Bidwell. 2005. The potential for Asian clam (Corbicula fluminea) dieoffs to impact native freshwater mussels (Unionidae) I: Water column ammonia levels and ammonia toxicity. Journal of the North American Benthological Society, 24:369-380.
• Cooper, N.L., J.R. Bidwell and D.S. Cherry. 2005. The potential for Asian clam (Corbicula fluminea) die-offs to impact native freshwater mussels (Unionidae) II: Pore-water ammonia. Journal of the North American Benthological Society, 24:381-394.
• Burkhart, J.G., J.R. Bidwell, D.J. Fort, and S.R. Sheffield. 2003. Chemical Stressors. In: Linder, G., S.K. Krest and D.W. Sparling (eds). Amphibian Decline: An Integrated Analysis of Multiple Stressors. SETAC Press, Pensacola, FL. pp. 111-128.
• Mann, R.M., J.R. Bidwell and M.J. Tyler. 2003. Toxicity of herbicide formulations to frogs and the implications for product registration: A case study from Western Australia. Applied Herpetology, 1:13-22.
• Ross, K.E. and J.R. Bidwell. 2003. Assessing the application of an additive model to estimate toxicity of a complex effluent. Journal of Environmental Quality, 32:1677-1682.