Link to Rachel Penczykowski’s Google Scholar profile


24. Penczykowski, R. M. and R. D. Sieg. 2021. Plantago spp. as models for studying the ecology and evolution of species interactions across environmental gradients. In press at American Naturalist.

23. Duffy, M. A., C. Garcia-Robledo, S. Gordon, N. A. Grant, D. A. Green II, A. Kamath, R. M. Penczykowski, M. Rebolleda Gómez, N. Wale, and L. Zaman. 2021. Model systems in ecology, evolutionary biology, and behavior: A call for diversity in our model systems and discipline. In press at American Naturalist.

22. Penczykowski, R. M., S. R. Hall, M. S. Shocket, J. Housley Ochs, B. C. P. Lemanski, H. Sundar, and M. A. Duffy. 2021. Virulent disease epidemics can increase host density by depressing foraging of hosts. In press at American Naturalist.


21. Ezenwa, V. O., D. J. Civitello, B. T. Barton, D. J. Becker, M. Brenn-White, A. T. Classen, S. L. Deem, Z. E. Johnson, S. Kutz, M. Malishev, R. M. Penczykowski, D. L. Preston, J. T. Vannatta, and A. M. Koltz. 2020. Infectious diseases, livestock, and climate: a vicious cycle?Trends in Ecology & Evolution.
Link to press release from WashU

20. Halliday*, F. W., R. M. Penczykowski*, B. Barrès, J. L. Eck, E. Numminen, and A.-L. Laine. 2020. Facilitative priority effects drive pathogen community assembly in a wild-plant pathosystem. Nature Ecology & Evolution, 4:15101521. (*co-first/corresponding authors)
Link to press release from WashU

19. Ives, A. R., B. T. Barton, R. M. Penczykowski, J. P. Harmon, K. L. Kim, K. Oliver, and V. C. Radeloff. 2020. Self-perpetuating ecological-evolutionary dynamics in an agricultural host-parasite system. Nature Ecology & Evolution, 4:702–711.


18. Penczykowski, R. M., S. R. Parratt, B. Barrès, S. K. Sallinen, and A-L Laine. 2018. Manipulating host resistance structure reveals impact of pathogen dispersal and environmental heterogeneity on epidemics. Ecology, 99:28532863.


17. Hite, J. L., R. M. Penczykowski, M. S. Shocket, K. Griebel, A. T. Strauss, M. A. Duffy, C. E. Cáceres, and S. R. Hall. 2017. Allocation, not male resistance, increases male frequency during epidemics: a case study in facultatively sexual hosts. Ecology, 98:27732783.

16. Penczykowski, R. M., B. M. Connolly, and B. T. Barton. 2017. Winter is changing: trophic interactions under altered snow regimes. Food Webs, 13:8091.

15. Parratt, S. R., B. Barrés, R. M. Penczykowski, and A-L Laine. 2017. Local adaptation at higher trophic levels: Contrasting hyperparasite-pathogen infection dynamics in the field and laboratory. Molecular Ecology, 26:1964–1979.


14. Strauss, A. T., M. S. Shocket, D. J. Civitello, J. L. Hite, R. M. Penczykowski, M. A. Duffy, C. E. Cáceres, and S. R. Hall. 2016. Habitat, predators, and hosts regulate disease in Daphnia through direct and indirect pathways. Ecological Monographs, 86:393–411.

13. Hite, J. L., R. M. Penczykowski, M. S. Shocket, A. T. Strauss, P. A. Orlando, M. A. Duffy, C. E. Cáceres, and S. R. Hall. 2016. Parasites destabilize host populations by shifting stage-structured interactions. Ecology, 97:439449.

12. Penczykowski, R. M., A-L Laine, and B. Koskella. 2016. Understanding the ecology and evolution of host–parasite interactions across scales. Evolutionary Applications, 9:3752.


11. Civitello, D. J., R. M. Penczykowski, A. Smith, M. S. Shocket, M. A. Duffy, and S. R. Hall. 2015. Resources, key traits, and the size of fungal epidemics in Daphnia populations. Journal of Animal Ecology, 84:10101017.

10. Penczykowski, R. M., E. Walker, S. Soubeyrand, and A-L Laine. 2015. Linking winter conditions to regional disease dynamics in a wild plant-pathogen metapopulation. New Phytologist, 205:11421152.


9. Penczykowski, R. M., B. C. P. Lemanski, R. D. Sieg, S. R. Hall, J. Housley Ochs, J. Kubanek, and M. A. Duffy. 2014. Poor resource quality lowers transmission potential by changing foraging behaviour. Functional Ecology, 28:12451255.

8. Penczykowski, R. M., S. R. Hall, D. J. Civitello, and M. A. Duffy. 2014. Habitat structure and ecological drivers of disease. Limnology & Oceanography, 59:340348.


7. Auld, S. K. J. R., R. M. Penczykowski, J. Housley Ochs, D. C. Grippi, S. R. Hall, and M. A. Duffy. 2013. Variation in costs of parasite resistance among natural host populations. Journal of Evolutionary Biology, 26:24792486.

6. Civitello, D. J., R. M. Penczykowski, J. L. Hite, M. A. Duffy, and S. R. Hall. 2013. Potassium stimulates fungal epidemics in Daphnia by increasing host and parasite reproduction. Ecology, 94:380388.


5. Duffy, M. A., J. Housley Ochs, R. M. Penczykowski, D. J. Civitello, C. A. Klausmeier, and S. R. Hall. 2012. Ecological context influences epidemic size and parasite-driven evolution. Science, 335:1636–1638.


4. Duffy, M. A., J. M. Housley, R. M. Penczykowski, C. E. Cáceres, and S. R. Hall. 2011. Unhealthy herds: indirect effects of predators enhance two drivers of disease spread. Functional Ecology, 25:945–953.

3. Thomas, S. H., J. M. Housley, A. N. Reynolds, R. M. Penczykowski, K. H. Kenline, N. Hardegree, S. Schmidt, and M. A. Duffy. 2011. The ecology and phylogeny of oomycete infections in Asplanchna rotifers. Freshwater Biology, 56:384394.

2. Penczykowski, R. M., S. E. Forde, and M. A. Duffy. 2011. Rapid evolution as a possible constraint on emerging infectious diseases. Freshwater Biology, 56:689704.


1. Kamarainen, A. M., R. M. Penczykowski, M. C. Van de Bogert, P. C. Hanson, and S. R. Carpenter. 2009. Phosphorus sources and demand during summer in a eutrophic lake. Aquatic Sciences, 71:214227.