Zoology

My areas of research interest include evaluating the effects of chemical mixtures, developing a basic understanding of the chemical and biological factors affecting toxicity, bioavailability and bioaccumulation, remediation of contaminated sites and evaluating the effectiveness of Best Management Practices in reducing pesticide and nutrient loadings into aquatic systems. I have received funding from the U.S. Environmental Protection Agency, industry and state sources to conduct research in these areas.

For more information on my research program, please see my lab webpage.

Recent Publications

Mehler, W.T., L.J. Schuler and M.J. Lydy. 2008. Examining the joint toxicity of chlorpyrifos and atrazine in the aquatic species: Lepomis macrochirus, Pimephales promelas, and Chironomus tentans. Environmental Pollution. 151(2), 217-224.

Maul, J.D., A.J. Trimble and M.J. Lydy. 2008. Partitioning and matrix-specific toxicity of bifenthrin among sediments and leaf-sourced organic matter. Environmental Toxicology and Chemistry. 27 (4): 945-952.

Weston, D.P., M. Zhang and M.J. Lydy. 2008. Identifying the cause and source of sediment toxicity in an agriculture-influenced creek. Environmental Toxicology and Chemistry. 27(4): 953-962.

Trimble, T.A., J. You and M.J. Lydy. 2008. Bioavailability of PCBs from field-collected sediments: Application of Tenax extraction and matrix-SPME techniques. Chemosphere. 71: 337-344.

You J. and M.J. Lydy. 2006. Determination of pyrethroid, organophosphate and organochlorine pesticides in water by headspace solid-phase microextraction. International Journal of Environmental Analytical Chemistry, 86(6): 381-389.

Schuler, L.J., P.F. Landrum and M.J. Lydy. 2007. Response spectrum of pentachlorobenzene and fluoranthene for Chironomus tentans and Hyalella azetca. Environmental Toxicology and Chemistry. 26 (6): 1248-1257.

Schuler, L.J., P.F. Landrum and M.J. Lydy. 2007. Response spectrum of fluroanthene and pentachlorobenzene for the fathead minnow (Pimephales promelas). Environmental Toxicology and Chemistry. 26(1) 139-148.

Belden, J.B., J.D. Maul and M.J. Lydy 2007. Partitioning and photodegradation of ciprofloxacin in aqueous systems in the presence of organic matter. Chemosphere. 66: 1390-1395.

Belden, J.B., R.J. Gilliom, J.D. Martin and M.J. Lydy. 2007. Relative toxicity and occurrence patterns of pesticide mixtures in streams draining agricultural watersheds dominated by corn and soybean production. Integrated Environmental Assessment and Management. 3(1): 90-100.

You, J., P.F. Landrum, T.A. Trimble, and M.J. Lydy. 2007. Availability of polychlorinated biphenyls in field-contaminated sediment. Environmental Toxicology and Chemistry. 26(9): 1940-1948.

Straub,C., J.D. Maul, R.S. Halbrook, B. Spears, and M.J. Lydy. 2007. Trophic transfer of polychlorinated biphenyls in Great Blue Heron (Ardea herodias) at Crab Orchard National Wildlife Refuge. Archives of Environmental Contamination and Toxicology. 52: 572-579.

Belden, J.B., R.J. Gilliom and M.J. Lydy. 2007. How well can we predict the aquatic toxicity of pesticide mixtures? Integrated Environmental Assessment and Management. 3(3): 364-372.

Londono, D.K., H.A.A. Siqueira, H. Wang, G. Sarath, M.J. Lydy, and B.D. Siegfried. 2007. Cloning and expression of an atrazine inducible cytochrome P450, CYP4G33, from Chironomus tentans (Diptera: Chironomidae). Pesticide Biochemistry and Physiology, 89: 104-110.

You, J, S. Pehkonen, P.F. Landrum and M.J. Lydy. 2007. Desorption of hydrophobic compounds from laboratory-spiked sediments measured by Tenax absorbent and matrix solid-phase microextraction. Environmental Science and Technology. 41: 5672-5678.

You, J. and M.J. Lydy. 2007. A solution for isomerization of pyrethroid insecticides in gas chromatography. Journal of Chromatography A. 1166: 181-190.

Landrum, P. F., S. D. Robinson, D.C. Gossiaux, J. You, M.J. Lydy, S. Mitra, and T.E.M. ten Hulscher. 2007. Predicting bioavailability of sediment-associated organic contaminants for Diporeia spp. and oligochaetes. Environmental Science and Technology. 41: 6442-6447.

Keller, A.E., M.J. Lydy and D.S. Ruessler. 2007. Unionid mussel sensitivity to environmental contaminants. In: Freshwater Bivalve Ecotoxicology. J.L. Farris and J.H.Van Hassel, editors. CRC Press. Boca Raton, FL. pp.151-163.

Maul, J.D., J.L. Farris and M.J. Lydy. 2006. Interaction of an ecological stressor (predation) and organophosphorus pesticides on Ceriodapnia dubia survival. Environmental Pollution, 141: 90-97.

Belden, J.B and M.J. Lydy. 2006. Joint toxicity of chlorpyrifos and esfenvalerate to fathead minnows and midge larvae. Environmental Toxicology and Chemistry, 25(2): 623-629.

Schuler, L.J., P.F. Landrum and M.J. Lydy. 2006. Comparative toxicity of fluoranthene and pentachlorobenzene to three freshwater invertebrates. Environmental Toxicology and Chemistry, 25(4): 985-994.

Maul, J.D., J.B. Belden, B.A. Schwab, M.R. Whiles, B. Spears, J.L. Farris and M.J. Lydy 2006. Bioaccumulation and trophic transfer of polychlorinated biphenyls by aquatic and terrestrial insects to tree swallows (Tachycineta bicolor). Environmental Toxicology and Chemistry, 25(4): 1017-1025.

Trimble, A.J. and M.J. Lydy. 2006. Effects of triazine herbicides on organophosphate insecticide toxicity in Hyalella azetca. Archives of Environmental Contamination and Toxicology, 51: 29-34.

Amweg, E.L., D.P. Weston, C.S. Johnson, J. You and M.J. Lydy. 2006. Effect of piperonyl butoxide on permethrin toxicity in the amphipod Hyalella azetca. Environmental Toxicology and Chemistry. 25(7): 1817-1825.

Amweg, E.L., D.P. Weston, J. You and M.J. Lydy. 2006. Pyrethroid insecticides and sediment toxicity in urban creeks from California and Tennessee, USA. Environmental Science and Technology, 40: 1700-1706.

Wacksman, M.N., J.D. Maul and M.J. Lydy. 2006. Impact of atrazine on chlorpyrifos toxicity to four aquatic vertebrates. Archives of Environmental Contamination and Toxicology. 51: 681-689.

Koch, B.T., J.E. Garvey, J. You and M.J. Lydy. 2006. Elevated organochlorines in the brain-hypothalamic-pituitary complex of intersexual shovelnose sturgeon. Environmental Toxicology and Chemistry, 25 (7): 1689-1697.

Maul, J.D., L.S. Schuler, J.B. Belden, M.R. Whiles and M.J. Lydy. 2006. Effects of the fluoroquinolone antibiotic ciprofloxacin on growth of detritvorous macroinvertebrates and stream microbial communities. Environmental Toxicology and Chemistry, 25(6): 1598-1606.

You, J., P.F. Landrum and M.J. Lydy 2006. Comparison of chemical approaches for assessing bioavailability of sediment-associated contaminants. Environmental Science and Technology. 40: 6348-6353.

Weston, D.P., E.L. Amweg, A. Mekebri, R.S. Ogle and M.J. Lydy. 2006. Aquatic effects of aerial spraying for mosquito control over an urban area. Environmental Science and Technology. 40: 5817-5822.