University of South Florida
Community and Population Ecology

field enclosures

Field enclosures

leech on newt

Leech on a newt

  Research and Publications

We are particularly interested it understanding how communities are structured and factors that affect population persistence.  Thus, we have been studying how competition, predation, parasitism, and abiotic factors affect the abundance, distribution, and interactions of species.

Sample Publications

Rohr, J.R., Civitello, D.J., Crumrine, P.W., Halstead, N.T., Miller, A.D, Schotthoefer, A.M., Stenoien, C., Johnson, L.B., Beasley, V.R. 2015. Predator diversity, intraguild predation, and indirect effects drive parasite transmission. Proceedings of the National Academy of the United States of America 112:3008-3013 (Altmetric score of 68, 97th percentile)

Douglas, M.R., Rohr, J.R., Tooker, J.F. 2015. Neonicotinoid insecticide travels through a soil food chain, disrupting biocontrol of non-target pests and decreasing soybean yield. Journal of Applied Ecology 52:25-260 Editor’s Choice, cover photo, and commentary (; Altmetric score of 105, 99th percentile and top 10 ever for the journal as of 6/2015)

Halstead, N.T., McMahon, T.A., Johnson, S., Raffel, T.R., Romansic, J.M., Crumrine, P.W., Rohr, J.R. 2014. Community ecology theory predicts the effects of agrochemical mixtures on aquatic biodiversity and ecosystem properties. Ecology Letters 17:932-941

McMahon, T.A.*, Halstead, N.T.*, Johnson, S., Raffel, T.R.†, Romansic, J.M.†, Crumrine, P.W., Rohr, J.R. 2012. Fungicide-induced declines of freshwater biodiversity modify ecosystem functions and services. Ecology Letters 15: 714-722

Johnson, P.T.J., Rohr, J.R., Hoverman, J.T. Kellermanns, E., Bowerman, J., Lunde, K.B. 2012. Host life history explains interspecific variation in disease risk. Ecology Letters 15: 235-242

Lekberg, Y., Meadow, J., Rohr, J.R., Redecker, D., Zabinski, C.A. 2011. Importance of dispersal and thermal environment for mycorrhizal communities: Lessons from Yellowstone National Park. Ecology. 92: 1292-1302

Schotthoefer, A.M., Rohr, J.R., Cole, R.A., Koehler, A.V., Johnson, C.M., Johnson, L.B., Beasley, V.R. 2011. Effects of wetland and landscape variables on parasite communities of Rana pipiens: links to anthropogenic changes. Ecological Applications. 24: 1257-1271

Jennings, D.E., Krupa, J.J., Raffel, T.R., Rohr, J.R. 2010. Evidence for competition between carnivorous plants and spiders. Proceedings of the Royal Society B - Biological Sciences. 277: 3001-3008

Raffel, T.R.†, Hoverman, J.T.†, Halstead, N.T., Michel, P.§, Rohr, J.R. 2010. Parasitism in a community context: Trait-mediated interactions with competition and predation. Ecology. 91: 1900-1907

Clements, W.H., Rohr, J.R. 2009. Community responses to contaminants: Using basic ecological principles to predict ecotoxicological effects. Environmental Toxicology and Chemistry. 28: 1789-1800

Rohr, J.R., Schoetthofer, A.M., Raffel, T.R., Carrick, H.J., Halstead, N., Hoverman, J.T., Johnson, C.M., Johnson, L.B., Lieske, C., Piwoni, M.D., Schoff, P.K., Beasley, V.R. 2008. Agrochemicals increase trematode infections in a declining amphibian species. Nature. 455: 1235-1239

Rohr, J.R., Raffel, T.R., Sessions, S.K., Hudson, P.J. 2008. Understanding the net effects of pesticides on amphibian trematode infections. Ecological Applications. 18: 1743-1753

Lekberg, Y., Koide, R.T., Rohr, J.R., Aldrich-Wolfe, L., Morton, J.B. 2007. Role of niche theory and dispersal in the composition of arbuscular mycorrhizal fungal communities. Journal of Ecology. 95: 95-105

Rohr, J.R., Kerby, J., Sih, A. 2006. Community ecology theory as a framework for predicting contaminant effects. Trends in Ecology and Evolution. 21: 606-613 (invited submission) A featured article

Rohr, J.R., Sager, T. Sesterhenn, T., Palmer, B.D. 2006. Exposure, post-exposure, and density-mediated effects of atrazine on amphibians: Breaking down net effects into their parts. Environmental Health Perspectives. 114: 46-50 A featured article

Rohr, J.R., Crumrine, P. 2005. Effects of an herbicide and an insecticide on pond community structure and processes. Ecological Applications. 15:1135-1147

Koide, R.T., Rohr, J.R., Xu, B. in review. Causes of spatial and temporal patterning of an ectomycorrhizal fungal community of Pinus resinosa Ait. Plantation. New Phytologist.

Rohr, J.R., Kerby, J.L., Sesterhenn, T., Sih, A. in prep. Evidence that trait-mediated effects of pollution can cause population declines.

For a full list of publications, please see the Publications page on this website.