Professor, Department of Fisheries, Wildlife and Conservation Biology
Ph. D. University of Minnesota
B.S. Slippery Rock University
Aquatic ecology, invasive species, and fisheries management.
My research interests are in applied and basic aquatic ecology with an emphasis on trophic relations, littoral zones, and streams. I have a wide range of research interests in fisheries ecology and believe a mix of descriptive and manipulative research is essential. Much of my work is interdisciplinary and has involved collaboration with other researchers.
I am interested in basic and applied aspects of herbivory on freshwater macrophytes by invertebrates. This work includes applied research on potential biological control agents of nuisance weeds such as Eurasian watermilfoil and more basic research on the role of secondary chemicals in the use of macrophytes by aquatic invertebrates. My students and I have examined secondary chemicals as feeding deterrents to generalist herbivores and as oviposition attractants to specialist herbivores that may be useful biological control agents. More recently we have been examing the ecology of invasive aquatic plants such as milfoil and curlyleaf pondweed. This includes work on effects of large scale treatments to control invasive plants, models to predict invasion and the ecology of propagules such as seeds and turions.
I am also interested in trophic relations of fish. For example, at what spatial scale are stream fish food limited? Does fish predation limit populations of watermilfoil control agents?
Lastly, I am interested in stream fish and invertebrates, especially as these relate to density, growth, and feeding relations. I am particularly interested in research linking individual fish responses to population level responses. Recent applied work is aimed at determining the effects of riparian logging practices on stream habitat, invertebrates and fish population.
Baker, L.A. and R.M. Newman. 2014. Managing the biological, economic, and social aspects of sustainability of lake ecosystems. Pages 76-86 in S. Ahuja, Comprehensive Water Quality and Purification, Volume 4, Elsevier.
Newman, R. M. and R.D. Rotjan. 2013. Re-examining the fundamentals of grazing: freshwater, marine and terrestrial similarities and contrasts (commentary on Burkepile 2013). Oikos 122: 317-320.
Eule-Nashoba, A. R., D. D. Biesboer, and R. M. Newman. 2012. Seed size in lacustrine and riverine populations of wild rice (Zizania palustris L.) in northern Minnesota and Wisconsin. Botany 90:(1) 27-33
Johnson, J.A., A. R. Jones and R.M. Newman. 2012. Evaluation of lakewide, early season herbicide treatments for controlling invasive curlyleaf pondweed (Potamogeton crispus) in Minnesota lakes. Lake and Reservoir Management 28(4): 346-363.
Homans, F. and R.M. Newman. 2011. Management of aquatic invasive species. Pages 226-245 in K. W. Easter and J. Perry (eds). Water policy in Minnesota: Issues, incentives, and action. Resources For the Future, Washington, DC.
Huser, B.J., P. L. Brezonik and R. M. Newman. 2011. Effects of alum treatment on water quality and sediment in the Minneapolis Chain of Lakes, Minnesota, USA. Lake and Reservoir Management 27(3): 220-228.
Johnson, J.A. and R.M. Newman. 2011. A comparison of two methods for sampling biomass of aquatic plants. Journal of Aquatic Plant Management 49(1): 1-8.
Merten, E.C., J.C. Finlay, L.B. Johnson, R.M. Newman, H.G. Stefan, and B. Vondracek. 2011. Environmental controls of wood entrapment in Upper Midwestern streams. Journal of Hydrologic Processes 25: 593-602.
Merten, E.C., N.A. Hemstad, R. K. Kolka, R.M. Newman, E.S. Verry and B. Vondracek. 2010. Recovery of sediment characteristics in moraine, headwater streams of northern Minnesota after forest harvest. Journal of the American Water Resources Association 46(4): 733-743.