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Community and Population Ecology

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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

Haggerty, C.J.E., Crisman, T.L., Rohr, J.R. 2019. Effects of forestry-driven changes to groundcover and soil moisture on amphibian desiccation, dispersal, and survival. Ecological Applications 29: e01870. 10.1002/eap.1870


Rohr, J.R., Bernhardt, E.S., Cadotte, M.W., Clements, W.H. 2018. The ecology and economics of restoration: When, what, where, and how to restore ecosystems damaged by global change. Ecology and Society, 23 (2):15.


Spaak, J.W., Baert, J.M., Baird, D.J., Eisenhauer, N., Maltby, L., Pomati, F., Radchuk, V., Rohr, J.R., Van den Brink, P.J., De Laender, F. 2017. Shifts of community composition and population density substantially affect ecosystem function despite invariant richness. Ecology Letters, 20, 1315-1324.


McMahon, T.A., Rohr, J.R., Bernal, X.E. 2017. Light and noise pollution interact to disrupt interspecific interactions. Ecology. 98: 1290–1299


De Laender, F., Rohr, J.R., Ashauer, R., Baird, DJ., Berger, U., Eisenhauer, N., et al. 2016. Reintroducing Environmental Change Drivers in Biodiversity–Ecosystem Functioning Research. Trends in Ecology & Evolution, 31 (12), 905-915. PDF

Rohr, J.R., Salice, C.J., Nisbet, R.M. 2016. The pros and cons of ecological risk assessment based on data from different levels of biological organization. Critical Reviews in Toxicology, 46 (9), 756-784.

Jennings, D.E., Krupa, J.J., Rohr, J.R. 2016. Foraging modality determines the strength of competitive interactions among carnivorous plants, spiders, and toads. Journal of Animal Ecology 85: 973-981 (PDF)

Cohen, J., Civitello, D., Brace, A., Feichtinger, E., Ortega, N., Richardson, J., Sauer, E., Rohr, J. 2016. Spatial scale modulates the strength of ecological processes driving disease distributions. Proceedings of the National Academy of Sciences, 113, E3359-E3364.

Civitello, D.J., Cohen, J., Fatima, H., Halstead, N.T., Liriano, J., McMahon, T.A., Ortega, C.N., Sauer, E., Sehgal, T., Young, S., Rohr, J.R. 2015. Biodiversity inhibits parasites: broad evidence for the dilution effect. Proceedings of the National Academy of Sciences 112: 8667–8671 (showcased by commentaries in PNAS and Science, double star recommendation by Faculty 1000, Altmetric score of 177, 99th percentile)

Buck, J.C., Scholz, K.I. Rohr, J.R., Blaustein, A.R. 2015. Trophic dynamics in an aquatic community: Interactions among primary producers, grazers, and a pathogenic fungus. Oecologia 178:239–248

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

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

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