Timothy J. Ehlinger
Timothy J. Ehlinger
Associate Professor
Aquatic Ecology, Stream Restoration and Sustainable Development

B.A., Northwestern Univ. 1980
M.Sc., Northwestern Univ. 1981
Ph.D., Michigan State Univ. 1986

Postdoctoral Fellow
Kellogg Biological Station 1987- 88
University of Toronto 1989-90

Office: Lapham S493
Phone: 414-229-4358
FAX: 414-229-3926
Email: ehlinger@uwm.edu
Laboratory Homepage

Research Interests

My basic research examines the cause and effect relationships betwen human-induced stressors and the ecological integrity of lakes, streams and rivers.

Our work incorporates landscape and watershed level processes, as well as detailed investigations of the habitat requirements, ecology and reproduction of fishes and aquatic invertebrates. These projects are often linked to the restoration or remediation of damaged ecosystems.

We are also involved in cross-disciplinary collaborations for the design and implementation of sustainable development strategies. Since 2001, I have been working closely with collaborators in Romania and Costa Rica using watershed ecology as a foundation for planning sustainable development. A central aspect of the international work includes partnerships with Universities and Research Institutes in Constanta, Romania and in Thessaloniki, Greece.

Selected Publications

Peer-Reviewed Journal Publications Related to Aquatic Ecology and Sustainability:
Novotny, V., O’Reilly, N., Ehlinger, T., Frevert, T. Twait, S. (2007). A river is reborn – the use attainability analysis of the Lower DesPlaines River, Illinois. Water Environment Research, 79(1): pp. 68-80(13)

Fayram, A. H., Hansen M.J, and Ehlinger, T. (2006). Characterizing changes in maturity of lakes resulting from supplementation of walleye populations." Ecological Modelling 197(1-2): 103-115.

Fayram, A, Hansen, M, and Ehlinger, T. (2006). Influence of walleye stocking on angler effort in Wisconsin. Human Dimensions of Wildlife 11(2)

Novotny, V., Bartošová, O’Reilly, N. and Ehlinger, T. (2005). Unlocking the Relationship of Biotic Integrity of Impaired Waters to Anthropogenic Stresses. Journal of Water Research. 34: 189-198.

Selected Agency and Peer-reviewed Technical Reports
Novotny,V.; Ehlinger, T.; Manolakos, E.; Bartosova, A.; O'Reilly, N.; Bedoya,D.; McGarvey,K.; Brooks, J.; Beach, D.; Farah, J.; and Shaker, R. 2007. Technical Report # 15. Final Report. Developing Risk Propagation Model for Estimating Ecological Responses of Streams to Anthropogenic Watershed Stresses and Stream Modifications. http://www.coe.neu.edu/environment/WebReports/EPA_final_Report2.pdf

Shaker, R.R,. and T.J. Ehlinger. 2007. Technical Report #11 Agricultural land fragmentation and biological integrity: the impacts of rapidly changing landscape on streams in Southeastern Wisconsin. http://www.coe.neu.edu/environment/WebReports/New_report11.pdf

O’Reilly, N., T.J. Ehlinger, and D.J. Osmon. 2007. Fox Lake Management Strategy Evaluation Report and Recommendations for Future Action – 2007. Prepared for Wisconsin DNR and Fox Lake Inland Protection and Rehabilitation District. June 2007, by Hey and Associates, Inc.

O'Reilly, N., T.J. Ehlinger and R.R. Shaker. 2007. Technical Report #14 The development and evaluation of methods for quantifying risk to fish in warm-water streams of Wisconsin using Self- Organizing Maps: influences of watershed and habitat stressors. http://www.coe.neu.edu/environment/WebReports/New_report14.pdf