Michael J. Lydy | Department of Zoology | SIU

Southern Illinois University



College of Science

Michael J. Lydy



Office: 179 Life Science II
Phone: 618-453-4091
Email: mlydy@siu.edu

Visit the Aquatic Toxicology Lab

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.


Ph.D., The Ohio State University

Courses taught

Zool 333 (Principles of Toxicology), ZOOL 411 (Environmental Risk Assessment), ZOOL 533 (Aquatic Toxicology), ZOOL 535 (Analytical Techniques)

Areas of interest

Environmental toxicology and risk assessment

Selected Recent Publications

Weston, D.P., J. You, A.D. Harwood and M.J. Lydy. 2009. Whole sediment toxicity identification evaluation tools for pyrethroid insecticides: III Temperature manipulation. Environmental Toxicology and Chemistry. 28 (1): 173-180.

Weston D.P., R.W. Holmes and M.J. Lydy. 2009. Residential runoff as a source of pyrethroid pesticides in urban creeks. Environmental Pollution. 157: 287-294.

Weston, D.P., R.D. Lentz, M.D. Cahn, R.S. Ogle, A.K. Rothert, and M.J. Lydy. 2009. Toxicity of anionic polyacrylamide formulations when used for erosion control in agriculture. Journal of Environmental Quality. 38: 238-247.

Hintzen, E.P., M.J. Lydy and J.B. Belden. 2009. Occurrence and potential toxicity of pyrethroids and other insecticides in bed sediments of urban streams in central Texas. Environmental Pollution. 157: 110-116.

Brennan, A.A., J. You and M.J. Lydy. 2009. Comparison of cleanup methods for fipronil and its degradation products in sediments extracts. Talanta.79: 1408-1413.

Wang, D., D.P. Weston and M.J. Lydy. 2009. Method development for the analysis of organophosphate and pyrethroid insecticides at low parts per trillion levels in water. Talanta. 78: 1345-1351.

You, J., A.A. Brennan, and M.J. Lydy. 2009. Bioavailability and biotransformation of sediment-associated pyrethroid insecticides in Lumbriculus variegatus. Chemosphere. 75:1477-1482.

Trimble, A.J., D.P. Weston, J.B. Belden and M.J. Lydy. 2009. Identification and evaluation of pyrethroid insecticide mixtures in urban sediments. Environmental Toxicology and Chemistry. 28 (8): 1687-1695.

Harwood, A.D., J. You and M.J. Lydy. 2009. Temperature as a toxicity identification evaluation tool for pyrethroid insecticides: Toxicokinetic confirmation. Environmental Toxicology and Chemistry. 28(5): 1051-1058.

Ding Y., J. You and M.J. Lydy. 2009. Analysis of pyrethroid insecticides in Chironomus dilutus using matrix solid phase dispersion extraction. Bulletin of Environmental Contamination and Toxicology. (83): 388-392.

Brennan, A.A., A.D. Harwood, J. You, P.F. Landrum and M.J. Lydy. 2009. Degradation of fipronil in anaerobic sediments and the effect on porewater concentrations. Chemosphere. 77: 22-28.

Schuler, L.J., P.F. Landrum, A.D. Harwood, E.M. Tripp and M.J. Lydy. 2009. Joint toxicity of fluoranthene and pentachlorobenzene to Hyalella azteca and Chironomus dilutus. Chemosphere.77:399-403.

Mehler, W.T., J.D. Maul, J. You and M.J. Lydy. 2010. Identifying the causes of sediment-associated contaminants in the Illinois River using a whole sediment toxicity identification evaluation. Environmental Toxicology and Chemistry. 12 (1): 158-167.

Ding, Y, A.D. Harwood, H.M. Foslund and M.J. Lydy. 2010. Distribution and toxicity of sediment associated pesticides in urban and agricultural waterways from Illinois, USA. Environmental Toxicology and Chemistry. 12 (1): 149-157.

Wang, D., D.P. Weston, Y. Ding and M.J. Lydy. 2010. Development of a sample preparation method for the analysis of current-use pesticides in sediment using gas chromatography. Archives of Environmental Contamination and Toxicology.58: 255-267.

Weston, W.P. and M.J. Lydy. 2010. Focused toxicity identification evaluations to rapidly identify the cause of toxicity in environmental samples. Chemosphere. 78: 368-374.

Mehler, W.T., J. You, J.D. Maul and M.J. Lydy. 2010. Comparative analysis of whole sediment and porewater identification evaluation techniques for ammonia and non-polar organic contaminants. Chemosphere. 78:814-821.

You J., D. Wang and M.J. Lydy. 2010. Determination of pyrethroid insecticides in sediment by gas chromatography-ion trap tandem mass spectrometry. Talanta. 81: 136-141.

Weston, D.P. and M.J. Lydy. 2010. Urban and agricultural sources of pyrethroid insecticides to the Sacramento-San Joaquin delta of California. Environmental Science and Technology. 44: 1833-1840.

Trimble, A.J., J.B. Belden, S.A. Mueting and M.J. Lydy. 2010. Determining modification to bifenthrin toxicity and sediment binding affinity from varying potassium chloride concentrations in overlying water. Chemosphere. 80: 53-59.

Maul, J.D., L.J. Schuler, R.S. Halbrook and M.J. Lydy. 2010. Congener-specific egg contribution of polychlorinated biphenyls to nestlings in two passerine species. Environmental Pollution. 158: 2725-2732.

Pehkonen, J. You, J. Akkanen, J.V.K. Kukkonen and M.J. Lydy. 2010. Influence of black carbon and chemical planarity on bioavailability of sediment-associated contaminants. Environmental Toxicology and Chemistry. 29 (9): 1976-1983.

Wang, D., J. You and M.J. Lydy. 2010. Sediment matrix effects in analysis of pyrethroid insecticides using gas chromatography-mass spectrometry. Archives of Environmental Contamination and Toxicology. 59: 382-392.

Li, H., Y. Wei, J. You and M.J. Lydy. 2010. Analysis of sediment-associated insecticides using ultrasound assisted microwave extraction and gas chromatography-mass spectrometry. Talanta. 83: 171-177.

Li, Huizhen, W.T. Mehler, M.J. Lydy and J.You. 2011. Occurrence and distribution of sediment-associated insecticides in urban waterways in the Pearl River Delta, China. Chemosphere. 82: 1373-1379.

Mehler, W.T., H. Li, M.J. Lydy and J. You. 2011. Identifying the causes of sediment-associated toxicity in urban waterways of the Pearl River Delta, China. Environmental Science and Technology. 45: 1812-1819.

You, J., A.D. Harwood, H. Li and M.J. Lydy. 2011. Chemical techniques for assessing bioavailability of sediment-associated contaminants: SPME versus Tenax extraction. Journal of Environmental Monitoring. 13:792-800. 

Ding, Y. D.P. Weston, J. You, A.K. Rothert and M.J. Lydy. 2011. Toxicity of sediment-associated pesticides to Chironomus dilutus and Hyalella azteca. Archives of Environmental Contamination and Toxicology. 61: 83-92. 

Mehler, W.T., H. Li, J. Pang, B. Sun, M.J. Lydy and J. You. 2011. Bioavailability of hydrophobic organic contaminants in sediment with different particle-size distributions. Archives of Environmental Contamination and Toxicology. 61: 74-82. 

You, J., R.A. Kelley, C.C. Crouse, J.T. Trushenski and M.J. Lydy. 2011. Analysis of persistent halogenated hydrocarbons in fish feeds containing fish oil and other alternative lipid sources. Talanta. 85: 1291-1297.

Weston, D.P., A.M. Asbell, S.A. Hecht, N.L. Scholz and M.J. Lydy. 2011. Pyrethroid insecticides in urban salmon streams of the Pacific Northwest. Environmental Pollution. 159: 3051-3056.

Mehler, W.T., J. Du, M.J. Lydy and J.You. 2011. Joint toxicity of a pyrethroid insecticide, cypermethrin, and a heavy metal, lead, to the benthic invertebrate Chironomus dilutus. Environmental Toxicology and Chemistry. 30(12): 2838-2845.

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