Welcome to my research website!

My main responsibilities at the Illinois Natural History Survey are performing biological surveys at proposed bridge construction sites for the Illinois Department of Transportation and the Illinois State Toll Highway Authority. I also pursue independent research. I work with a variety of organisms, but my main research interests are documenting basic natural history information of non-game fishes and freshwater mollusks, addressing the effects of anthropogenic disturbances on stream ecosystems, and restoring stream habitats and aquatic faunas.

If you have any questions, feel free to contact me (jtiemann[at]illinois.edu or 217.244.4594) or connect via LinkedIn or ResearchGate.