2022
Stewart Merrill, T., Calhoun, D. M. and P. T. J. Johnson (2022). Beyond single host, single parasite interactions: quantifying competence for complete multi-host, multi-parasite communities. Functional Ecology 36: 1845-1857. https://doi.org/10.1111/1365-2435.14068 PDF
Li, J., Chapman, J. and P. T. J. Johnson (2022). Co-infesting symbionts on a threatened marine host: Evaluating correlations between an introduced parasitic isopod and a native commensal clam. Marine Ecology Progress Series 695: 83-93. https://doi.org/10.3354/meps14105 PDF
McDevitt-Galles, T., Moss, W. E., Briggs, C. J. and P. T. J. Johnson (2022). How extreme drought events, introduced species, and disease interact to affect threatened amphibian populations. Freshwater Biology 41: 680-694. PDF
Nordheim, C., Detmering, S., Civitello, D., Johnson, P. T. J., Rohr, J., and T. McMahon (2022). Metabolites from the fungal pathogen Batrachochytrium dendrobatidis induce acquired resistance in Cuban treefrog tadpoles. Journal of Applied Ecology 59: 2398-2403.https://doi.org/10.1111/1365-2664.14242 PDF
Moss, W. E., Harper, L. R., Davis, M. A., Goldberg, C. S., Smith, M. W. and P. T. J. Johnson (2022). Navigating the tradeoffs between environmental DNA and conventional field surveys for improved amphibian monitoring. Ecosphere 13: e3941. https://doi.org/10.1002/ecs2.3941 PDF
Hobart, B., Moss, W., McDevitt-Galles, T., Stewart Merrill, T. and P. T. J. Johnson (2022). It's a worm-eat-worm world: Consumption of parasite free-living stages protects hosts and benefits predators. Journal of Animal Ecology 91: 35-45. doi: 10.1111/1365-2656.13591 PDF
2021
McDevitt-Galles, T., Carpenter, S., Koprivnikar, J. and P. T. J. Johnson (2021). How predator and parasite size interact to determine consumption of infectious stages. Oecologia 197:551-564. PDF
Moss, W. E., McDevitt-Galles, T., Muths, E., Bobzien, S., Purificato, J. and P. T. J. Johnson (2021). Resilience of native amphibian communities following catastrophic drought: evidence from a decade of regional-scale monitoring. Biological Conservation 263: 109352. PDF
Johnson, P. T. J. and. S. E. Haas (2021). Why do parasites exhibit reverse latitudinal diversity gradients? Testing the roles of host diversity, habitat, and climate. Global Ecology and Biogeography 30: 1810-1821. PDF
Bjarke, N., Livneh, B., Elmendorf, S., Molotch, N., Hinckley, E.-L., Emery, N., Johnson, P. T. J., Morse, J., and K. Suding (2021).Catchment scale observations at the Niwot Ridge Long-Term Ecological Research site. Hydrological Processes 35: e14320. PDF
Christianson, K., Loria, K., Blanken, P., Caine, T. N. and P. T. J. Johnson (2021). On thin ice: linking elevation and long-term losses of lake ice cover. Limnology and Oceanography Letters 6: 77-84 https://doi.org/10.1002/lol2.10181. PDF
Valenzuela-Sanchez, A., Wilber, M., Canessa, S., Bacigalupe, L., Muths, E., Schmidt, B., Cunningham, A., Ozgul, A., Johnson, P. T. J. and H. Cayuela (2021). Why disease ecology needs life-history theory: a host perspective. Ecology Letters 24: 876-890. PDF
Locke, S., Drago, F. B., López-Hernández, D., Chibwana, F. D., Núñez, V., Van Dam, A., Fernanda Achinelly, M., Johnson, P. T. J., Costa Alves de Assis, J., Lane de Melo, A., and H. Alves Pinto (2021). Intercontinental distributions, phylogenetic position and life cycles of species of Apharyngostrigea (Digenea, Diplostomoidea) illuminated with morphological, experimental, molecular and genomic data.International Journal for Parasitology 51: 667-683. PDF
Johnson, P. T. J., Calhoun, D. M., Moss, W. E., McDevitt-Galles, T., Riepe, T. B., Hallas, J. M., Parchman, T. L., Feldman, C. R., Achatz, T. J., Tkach, V. V., Cropanzano, J., Bowerman, J., and J. Koprivnikar (2021). The cost of travel: how dispersal ability limits local adaptation in host-parasite interactions. Journal of Evolutionary Biology 34: 512-524. PDF
Johnson, S. K. and P. T. J. Johnson (2021). Toxoplasmosis: Recent advances in understanding the link between infection and host behavior. Animal Biosciences 9: 249-264. PDF
2020
Calhoun, D. M., Esfahani, E., Locke, S. A., Moser, W., and P. T. J. Johnson (2020). How parasite exposure and time interact to determine Australapatemon burti (Trematoda: Digenea) infections in its intermediate leech host (Erpobdella microstoma) (Hirudinea: Eropdellidae). Experimental Parasitology 219: 108002. PDF
Rose. D. P., Calhoun. D. M., and P. T. J. Johnson (2020). Infection prevalence and pathology of the cymothoid parasite Olencira praegustator in Atlantic menhaden. Invertebrate Biology 2020;00:e12300. PDF
Loria, K. A., Christianson, K. R. and P. T. J. Johnson (2020). Phenology of alpine zooplankton populations and the importance of lake ice-out, Journal of Plankton Research 1-15. PDF
McKee*, K. M., Koprivnikar, J. Johnson, P. T. J. and M. T. Arts (2020). Parasite infectious stages provide essential fatty acids and lipid-rich resources to freshwater consumers. Oecologia 192:477-488. PDF
Preston, D. L., Sokol, E. R., Hell, K., McKnight, D. M. and P. T. J. Johnson (2020). Experimental effects of elevated temperature and nitrogen deposition on high elevation aquatic communities. Aquatic Sciences 82: 7. PDF
Iwaniec, D., Gooseff, M., Suding, K., Johnson, D., Reed, D., Peters, D., Adams, B., Barrett, J., Bestelmeyer, B., Castorani, M., Cook, E., Davidson, M., Hanan, N., Huenneke, L., Johnson, P., McKnight, D., Miller, R., Okin, G., Preston, D., Rassweiller, A., Ray, C., Sala, O., Schooley, R., Seastedt, T., Spasojevic, M., Vivoni, E. and P. Groffman. Future trajectories for ecosystems of the U.S. Long Term Ecological Research Network: The importance of connectivity. Ecosphere (accepted).
Martin*, K. R., Johnson, P. T. J., Bowerman, J. and J. Li (2020). Biogeography of the freshwater gastropod, Planorbella trivolvis, in the western United States. PLoS ONE 15(7):e0235989. PDF
Wilber, M. Q., Briggs., C. J. and P. T. J. Johnson (2020). Disease’s hidden death toll: Using parasite aggregation patterns to quantify landscape-level host mortality in a wildlife system. Journal of Animal Ecology 2020;00:1-12. PDF
Olesky*, I. A., Beck, W., Lammers, R., Steger, C., Christianson*, K., Wilson, C., Johnson, G., Vincent*, K., Johnson, P. T. J., and J. Baron (2020). The role of warm, dry summers and variation in snowpack on phytoplankton dynamics in mountain lakes. Ecology 101(10):e03125. PDF
Stewart Merrill, T. E. and P. T. J. Johnson (2020). Toward a mechanistic understanding of competence: a missing link in diversity-disease research. Parasitology 1-12. PDF
Wilber, M. Q., Johnson, P. T. J., and C. J. Briggs (2020). Disease hotspots or hot species? Infection dynamics in multi-host metacommunities controlled by species composition, not source location. Ecology Letters (in press). PDF
Moss, W. E., McDevitt-Galles, T., Calhoun, D. M. and P. T. J. Johnson (2020). Tracking the assembly of nested parasite communities: using β-diversity to understand variation in parasite richness and composition over time and scale. Journal of Animal Ecology 2020;00:1-11. PDF
McDevitt-Galles, T., Moss, W. E., Calhoun, D. M., and P. T. J. Johnson (2020). Phenological synchrony drives disease dynamics in host - parasite systems. Proceedings of the Royal Society Series B 287:20192597. PDF
Wood, C. L., Summerside, M., and P. T. J. Johnson (2020). How host diversity and abundance affect parasite infections: results from a whole-ecosystem manipulation of bird activity. Biological Conservation (in press). PDF
Loria K. A., McKnight D., Ragar D. M., and P. T. J. Johnson (2020). The life aquatic in high relief: how elevation dictates the physical and biological characteristics of alpine lakes in the Rocky Mountains, USA. Aquatic Sciences 82:11. PDF
2019
Kohl, Z. F., Calhoun, D. M., Elmer, F., Peachey, R. B. J., Leslie, K. L., Tkach, V., Kinsella, J. M., and P. T. J. Johnson (2019). Black-spot syndrome in Caribbean fishes linked to trematode parasite infection (Scaphanocephalus expansus). Coral Reefs 38: 917-930. PDF
Elmer, F., Kohl, Z. F., Johnson, P. T. J., and R. B. J. Peachey (2019). Spatial and temporal distribution of Black-Spot Syndrome associated with Scaphocephalus expansus nfection in reef fish within the wider Caribbean. Coral Reefs 38: 1303-1315. PDF
Wood, C. L., M. Summerside, and P. T. J. Johnson (2019). An effective method for ecosystem-scale manipulation of bird abundance and diversity. Ecology and Evolution 9: 9748-9758. PDF
Johnson, P. T. J., Calhoun, D. M., Riepe, T. B., and J. Koprivnikar (2019). Community disassembly and disease: realistic -- but not randomized -- biodiversity losses enchance parasite transmission. Proceedings of the Royal Society B: 286. PDF
Riepe, T. B., Calhoun, D. M., and P. T. J. Johnson (2019). Comparision of direct and indirect technique for evaluating endoparasite infections in wild-caught newts (Taricha torosa and Taricha granulosa). Diseases of Aquatic Organisms 134: 137-146. PDF
Stutz, W. E., Calhoun, D. M., and P. T. J. Johnson (2019). Resistance and tolerance: a hierarchical framework to compare individual versus family-level host contributions in an experimental amphibian-trematode system. Experimental Parasitology 199: 80-91. PDF
Calhoun, D. M., Leslie, K. L., Riepe, T. B., Achatz, T. J., McDevitt-Galles, T., Tkach, V. V., and P. T. J. Johnson (2019). Patterns of Clinostomum marginatum infection in fishes and amphibians: integration of field, genetic, and experimental approaches. Journal of Helminthology 94: e44. PDF
Johnson, P. T. J., Calhoun, D. M., Riepe, T. B., and J. Koprivnikar (2019). Chance or choice? Understanding parasite selection and infection in multi-host communities. International Journal of Parasitology 49:407-415. PDF
Koprivnikar, J., B. J. Hoye, T. M. Y. Urichuk, and P. T. J. Johnson (2019). Endocrine and immune responses of larval amphibians to trematode infections. Parasitology Research 118: 275-288. PDF
2018
Springer, Y. P. and P. T. J. Johnson (2018). Large-scale health disparities associated with tickborne diseases in the United States, 2007–2013. PLoS ONE 13: e0204609. PDF
Mihaljevic, J. R., Hoverman, J. T. and P. T. J. Johnson (2018). Co-exposure to multiple Ranavirus types enhances viral infectivity and replication in a larval amphibian system. Diseases of Aquatic Organisms 132: 23-35. PDF
Reid, A. J., Carlson, A. K., Creed, I. F., Eliason, E. J., Gell, P. A., Johnson, P. T. J., Kidd, K. A., MacCormack, T. J., Olden, J. D., Ormerod, S. J., Smol, J. P., Taylor, W. W., Tockner, K., Vermaire, J. C., Dudgeon, D., and S. J. Cooke (2018). Emerging threats and persistent conservation challenges for freshwater biodiversity. Biological Reviews 94: 849-873. PDF
Miller, D. A. W., Grant, E. H. C., Muths, E., Amburgey, S. M., Adams, M. J., Joseph, M. B., Waddle, H., Johnson, P. T. J., et al. (2018). Quantifying climate sensitivity and climate driven change in North American amphibian communities. Nature Communications 9: 3926. PDF
McDevitt-Galles, T. and P. T. J. Johnson (2018). Drought attenuates the impact of fish on aquatic macroinvertebrate diversity and species composition. Freshwater Biology 63: 1457-1468. PDF
Johnson, P. T. J. (2018). Acceptance of the Henry Baldwin Ward Medal for 2018: a fascination of the abomination. Journal of Parasitology 104: 595-599. PDF
Johnson, S. K., Fitza, M. A., Lerner, D. A., Calhoun, D. M., Beldon, M. A., Chan, E. T., and P. T. J. Johnson (2018). Risky Business: linking Toxoplasma gondii infection and entrepreneurship behaviors across individuals and countries. Proceedings of the Royal Society Series B: 285: 20180822. PDF
Johnson, P. T. J., Calhoun, D. M., Stokes, A. N., Susbilla, C. B., McDevitt-Galles, T., Briggs, C., Hoverman, J. T., Tkach, V., and J. de Roode (2018). Of poisons and parasites-the defensive role of tetrodotoxin against infections in newts. Journal of Animal Ecology 87: 1192-1204. PDF
Tornabene, B. J., Blaustein, A. R., Briggs, C. J., Calhoun D. M., Johnson, P. T. J., McDevitt-Galles, T., Rohr, J. R., and J. T. Hoverman (2018). Assessing the influence of landscape and environmental factors on ranavirus epidemiology in a California amphibian assemblage. Freshwater Biology 63: 639-651. PDF
Wilber, M. Q., Johnson, P. T. J. and C. J. Briggs (2018). When amphibian chytrid fungus invades: integrating theory and data to understand disease-induced amphibian declines. Chapter 12 in the edited volume Wildlife Disease Ecology: Linking Theory to Data and Application. PDF
Paull, S. H. and P. T. J. Johnson (2018). How temperature, pond-drying, and nutrients influence parasite infection and pathology. EcoHealth 15: 396-408. PDF
Preston, D. E., Hedman, H. D. and P. T. J. Johnson (2018). Nutrient availability and invasive fish jointly drive community dynamics in an experimental aquatic system. Ecosphere 9(3): e02153. PDF
Calhoun, D. M., McDevitt-Galles, T. and P. T. J. Johnson (2018). Parasites of invasive freshwater fishes and the factors affecting their richness and abundance. Freshwater Science 37: 134-146. PDF
McDevitt-Galles, T., Calhoun, D. M., and P. T. J. Johnson (2018). Parasite richness and abundance within aquatic macroinvertebrates: testing the role of host-and habitat-level factors. Ecosphere 9: e02188. PDF
Stutz, W. E., Blaustein, A. R., Briggs, C. J., Hoverman, J. T., Rohr, J. R., and P. T. J. Johnson (2018). Using multi-response models to investigate pathogen coinfections across scales: Insights from emerging diseases of amphibians. Methods in Ecology and Evolution 9: 1109-1120. PDF
Orlofske, S. A., Flaxman, S. M., Joseph, M. B., Fenton, A., Melbourne, B. A. and P. T. J. Johnson (2018). Experimental investigation of alternative transmission functions: quantitative evidence for the importance of non-linear transmission dynamics in host-parasite systems. Journal of Animal Ecology 87: 703-715. PDF
Haas, S. E., Reeves, M. K., Pinkney, A. E., and P. T. J. Johnson (2018). Continental-extent patterns in amphibian malformations linked to parasites, chemical contaminants, and their interactions. Global Change Biology 24: e275-e288. PDF
Johnson, P. T. J., Stanton, D. E., Forshay, K. J., and D. M. Calhoun (2018). Vertically challenged: how disease suppresses Daphina vertical migration behavior. Limology and Oceanography 63: 886-896. PDF
Mihaljevic, J. R., Hoye, B., and P. T. J. Johnson (2018). Parasite metacommunities: evaluating the roles of host community composition and environmental gradients in structuring symbiont communities within amphibians. Journal of Animal Ecology 87: 354-368. PDF
Koprivnikar, J., Riepe, T. B., Calhoun, D. M. and P. T. J. Johnson (2018). Whether larval amphibians school does not affect the parasite aggregation rule: testing the effects of host spatial heterogeneity in field and experimental studies. Oikos 127: 99–110. PDF
Giurfa, M., Schnell, A., Vedhara, K., Wystrach, A., Abell, J., Dukas, R., Mann, J., Scholey, A., Plotnik, J., Taylor, A. H., Johnson, S. K., Johnson, P. T. J., Hopper, L. M., Graham, K, Hobaiter, C., Byrne, R. W., Kaminsk, J., Wynne, C. D., and Z. Todd (2018). The psychologists’ tree of life. The Psychologist 31: 28-53. PDF
2017
Hannon, E. R., Calhoun, D. M., Chadalwada, S. and P. T. J. Johnson (2017). Circadian rhythms of trematode parasites: applying mixed models to test underlying patterns. Parasitology 145: 1-9. PDF
Calhoun, D. M., Bucciarelli, G. M., Kats, L. B., Zimmer, R. K. and P. T. J. Johnson (2017). Noxious newts and their natural enemies: Experimental effects of tetrodotoxin exposure on trematode parasites and aquatic macroinvertebrates. Toxicon 137:120-127. PDF
Johnson, P. T. J., and M. Q. Wilber (2017). Biological and statistical processes jointly drive population aggregation: using host-parasite interactions to understand Taylor's power law. Proceedings of the Royal Society Series B 284: 20171388. PDF
McCaffrey, K. and P. T. J. Johnson (2017). Drivers of symbiont diversity in freshwater snails: a comparative analysis of resource availability, community heterogeneity, and colonization opportunities. Oecologia 183: 927-938 [Highlighted Student Research]. PDF
Preston, D. L., Hedman, H. D., Esfahani, E. R., Pena, E. M., Boland, C. E., Lunde, K. B. and P. T. J. Johnson (2017). Responses of a wetland ecosystem to the controlled introduction of invasive fish. Freshwater Biology 62: 767-778. PDF
Wilber, M. Q., Johnson, P. T. J., and C. J. Briggs (2017). When can we infer mechanism from parasite aggregation? A constraint-based approach to disease ecology. Ecology 98: 688-702. PDF
2016
Stephens, P. E., Altizer, S., Smith, K. F., Aguirre, A. A., Brown, J. H., Budischak, S., Byers, J. E., Dallas, T., Davies, J. T., Drake, J. M., Ezenwa, V., Farrel, M., Gittleman, J. L., Han, B., Huang, S., Hutchinson, R. A., Johnson, P. T. J., Nunn, C. L., Onstad, D., Park, A., Vazquez-Prokopec, G. M., Schmidt, J. P. and R. Poulin (2016). The macroecology of infectious diseases: a new perspective on global-scale drivers of pathogen distributions and impacts. Ecology Letters 19: 1159-1171. PDF
Wood, C. L. and P. T. J. Johnson (2016). How does space influence the relationship between host and parasite diversity? Journal of Parasitology 102: 485-494. PDF
Preston, D. L., Caine, N., McKnight, D. M., Williams, M. W., Hell, K., Miller, M. P., Hart, S. J. and P. T. J. Johnson (2016). Climate regulates alpine lake ice cover phenology and aquatic ecosystem structure. Geophysical Research Letters 43: 5353-5360. PDF
Grant, E. H. C., Willer, D. A. W., Schmidt, B. R., Adams, M. J., Amburgey, S. M., Chambert, T., Cruickshank, S. S., Fisher, R. N., Green, D. M., Hossack, B. R., Johnson, P. T. J., Joseph, M. B., Rittenhouse, T., Ryan, M., Waddle, J. H., Walls, S. C., Bailey, L. L., Fellers, G. M., Gorman, T. A., Ray, A. M., Pilliod, D. S., Prices, S. J., Saenz, D., Sadinski, W. and E. Muths (2016). Quantitative evidence for the effects of multiple drivers on continental-scale amphibian declines. Scientific Reports 6: 25625. PDF
Altman, K. A., Paull, S. H., Johnson, P. T. J., Golembieski, M. N., Stephens, J. P., LaFonte, B. E., and T. R. Raffel (2016). Host and parasites thermal acclimation responses depend on the stage of infection. Journal of Animal Ecology 85: 1014-2014. PDF
Koprivnikar, J. and P. T. J. Johnson (2016). The rise of disease ecology and its implications for parasitology -- a review. Journal of Parasitology 102: 397-409. PDF
Johnson P. T. J., Wood, C. L., Joseph, M. B., Preston, D. L., Haas, S. E., and Y. P. Springer (2016). Habitat heterogeneity drives the host diversity-begets-parasite diversity relationship: evidence from experimental and field studies. Ecology Letters 19: 752-761. PDF
Mischler, J. A., Johnson, P. T. J., McKenzie, V. J., and A. R. Townsend (2016). Parasite infection alters nitrogen cycling at the ecosystem scale. Journal of Animal Ecology 85: 817-828. PDF
Calhoun, D. M., Woodhams, D., Howard, C., LaFonte, B. E., Gregory, J. R., and P. T. J. Johnson (2016). Role of antimicrobial peptides in amphibian defense against trematode infection. EcoHealth 13: 383-391. PDF
Preston, D. L., Mischler, J., Townsend, A. and P. T. J. Johnson (2016). Disease ecology meets ecosystem science. Ecosystems 19: 737-748. PDF
Hannon, E. R., Kinsella, J. M., Calhoun, D. M., Joseph, M. B. and P. T. J. Johnson (2016). Endohelminths in bird hosts from northern California and an analysis of the role of life history traits on parasite richness. Journal of Parasitology 102: 199-207. PDF
Joseph, M. B., Preston, D. L. and P. T. J. Johnson (2016). Integrating occupancy models and structural equation models to understand species occurrence. Ecology 97: 765-775. PDF
Springer Y. P., et al. (2016). Tick-, mosquito-, and rodent-borne parasite sampling designs for the National Ecological Observatory Network. Ecosphere 7:e01271. 10.1002/ecs2.1271 PDF
2015
Johnson, P. T. J., Ostfeld, R. S. and F. Keesing (2015). Frontiers in research on biodiversity and disease. Ecology Letters 18: 1119-1133. PDF
Johnson, P. T. J., De Roode, J. C. and A. Fenton (2015). Why infectious disease biology needs community ecology. Science 349: 1259504. PDF
LaFonte, B. E., Raffel, T. R., Monk, I. N. and P. T. J. Johnson (2015). Quantifying larval trematode infections in hosts: a comparison of method validity and evaluation of their implications for infection success. Experimental Parasitology 154: 155-162. PDF
Calhoun, D. M., Schaffer, P. A., Gregory, J. R., Hardy, K. M., and P. T. J. Johnson (2015). Experimental exposure of bluegill to Ribeiroia ondatrae: histopathology and hematological responses. Journal of Aquatic Animal Health 27: 185-191. PDF
Orlofske, S. A., Jadin, R. C. and P. T. J. Johnson (2015). It's a predator-eat-parasite world: how characteristics of predator, parasite and environment affect consumption. Oecologia 178: 537-547. PDF
Huver, J. R., Koprivnikar, J., Johnson, P. T. J. and S. Whyard (2015). Development and application of an eDNA method to detect and quantify a pathogenic parasite in aquatic ecosystems. Ecological Applications 25: 991-1002. PDF
Mihaljevic, J. R., Joseph, M. B., and P. T. J. Johnson (2015). Using multi-species occupancy models to improve the characterization and understanding of metacommunity structure. Ecology 96: 1783-1792. PDF
Stewart-Koster, B., Olden, J. D., and P. T. J. Johnson (2015). Integrating landscape connectivity and invasion vulnerability to guide offensive and defensive invasive species management. Journal of Applied Ecology 52: 366-378. PDF
Wood, C. L. and P. T. J. Johnson (2015). A world without parasites: Exploring the hidden ecology of infection. Frontiers in Ecology and the Environment 13: 425-434. PDF
Paull, S. H., Raffel, T. R., LaFonte, B. E. and P. T. J. Johnson (2015). How temperature shifts affect parasite production: Testing the roles of thermal stress and acclimation. Functional Ecology 29: 941-950. PDF
2014
Preston, D. L., Boland, C., Hoverman, J. T. and P. T. J. Johnson (2014). Natural enemy ecology: comparing the effects of predation risk, infection risk and disease on host behavior. Functional Ecology 28: 1472-1481. PDF
Johnson, P. T. J. and J. T. Hoverman (2014). Heterogeneous hosts: how variation in host size, behaviour, and immunity affect parasite aggregation. Journal of Animal Ecology 83: 1103-1112. PDF
Koprivnikar, J., Paull, S. H. and P. T. J. Johnson (2014). Combined influence of hydroperiod and parasitism on larval amphibian development. Freshwater Science 33: 941-949. PDF
Orlofske, S. A., Jadin, R. C., Hoverman, J. T. and P. T. J. Johnson (2014). Predation and disease: understanding the effects of predators at multiple trophic levels on pathogen transmission. Freshwater Biology 59: 1064-1075. PDF
Johnson, P. T. J., Koprivnikar, J., Orlofske, S. A., Melbourne, B. A. and B. E. LaFonte (2014). Making the right choice: testing the drivers of asymmetric infections within hosts and their consequences for pathology. Oikos 123:875-885. PDF
Paull, S. H. and P. T. J. Johnson (2014). Experimental warming drives a seasonal shift in the timing of host-parasite dynamics with consequences for disease risk. Ecology Letters 17: 445-453. PDF
Preston, D. L., Orlofske, S. A. and P. T. J. Johnson (2014). Complex life cycles, ontogenetic niche shifts and the role of parasites in a pond food web. Oecologia 174: 953-965. PDF
2013
Johnson, P. T. J., Preston, D. L., Hoverman, J. T., and B. E. LaFonte (2013). Host and parasite diversity jointly regulate pathogen transmission in complex communities. Proceedings of the National Academy of Sciences 110: 16916-16921. PDF
Reeves, M., Medley, K., Pinkney, A., Holyoak, M., Johnson, P. T. J. and M. Lannoo (2013). Localized hotspots drive continental geography of abnormal amphibians. PLoS ONE 8: e77467. PDF
Altizer, S., Ostfeld, R. S., Harvell, C. D., Johnson, P. T. J., and S. Kutz (2013). Climate change and infectious diseases: from evidence to a predictive framework. Science 341: 514-519. PDF
Rohr, J. R., Blaustein, A. R., Paull, S. H., Johnson, P. T. J., Raffel, T., and S. Young (2013). Using physiology to understand climate-driven changes in disease and their implications for conservation. Conservation Physiology 1: 1-15. PDF
LaFonte, B. E. and P. T. J. Johnson (2013). Experimental infection dynamics: using immunosuppression and in vivo parasite tracking to understand host resistance in an amphibian-trematode system. Journal of Experimental Biology 216: 3700-3708. PDF
Lambden, J. and P. T. J. Johnson (2013). Quantifying the biomass of parasites to understand their role in aquatic communities. Ecology and Evolution 3: 2310-2321. PDF
Hoverman, J. T., Hoye, B. and P. T. J. Johnson (2013). Does timing matter? How priority effects influence the outcome of parasite interactions within hosts. Oecologia 173: 1471-1480. PDF
Reeves, M., Medley, K., Pinkney, A., Holyoak, M., Johnson, P. T. J. and M. Lannoo (2013). Localized hotspots drive continental geography of abnormal amphibians. PLoS ONE 8: e77467. PDF
Pinto, H. A., Jadin, R. C., Orlofske, S. A., Johnson, P. T. J. and A. L. Melo (2013). Biomphalaria straminea (Mollusca: Planorbidae) as an intermediate host for Ribeiroia (Trematoda: Psilostomidae) in Brazil. Journal of Parasitology 99: 914-918. PDF
Joseph, M. B., Mihaljevic, J. R., Arellano, A. L., Kueneman, J. G., Preston, D. L., Cross, P. C. and P. T. J. Johnson (2013). Taming wildlife disease: bridging the gap between science and management. Journal of Applied Ecology 50: 702-712. PDF
Peterson, A. C., Richgels, K. L. D., Johnson, P. T. J., and V. J. McKenzie (2013). Investigating the dispersal routes used by an invasive amphibian,Lithobates catesbeianus, in human-dominated landscapes. Biological Invasions 15: 2179-2191. PDF
Richgels, K. L. D., Hoverman, J. T., and P. T. J. Johnson (2013). Evaluating community structure and the role of regional and local processes in larval trematode metacommunities of Helisoma trivolvis. Ecography 36: 854-863. PDF
Thieltges, D. W., Amundsen, P. A., Hechinger, R. F., Johnson, P. T. J., Lafferty, K. D., Mouritsen, K. N., Preston, D. L., Reise, K., Zander, C. D. and R. Poulin (2013). Parasites as prey in aquatic food webs: implications for predator infection and parasite transmission. Oikos 122: 1473-1482. PDF
Johnson, P. T. J., Preston, D. L., Hoverman, J. T., and K. L. D. Richgels (2013). Biodiversity reduces disease through predictable changes in host community competence. Nature 494: 230-234. PDF
Preston, D. L., Orlofske, S. A., Lambden, J. P. and P. T. J. Johnson (2013). Biomass and productivity of parasites in pond ecosystems. Journal of Animal Ecology 82: 509-517. PDF
Paull, S. and P. T. J. Johnson (2013). Can we predict climate-driven changes to disease dynamics? Applications for theory and management in the face of uncertainty. Wildlife Conservation in a Changing Climate (J.F. Brodie, E. Post and D. Doak, eds.). University of Chicago Press.
McMahon, T. A., Brannelly, L. A., Chatfield, M. W. H., Johnson, P. T. J., Joseph, M. B., McKenzie, V. J., Richards-Zawacki, C. L. and J. R. Rohr (2013). Chytrid fungus Batrachochytrium dendrobatidis has non-amphibian hosts and releases chemicals that cause pathology in the absence of infection. Proceedings of the National Academy of Sciences 110: 210-215. PDF
Johnson, P. T. J., Hoverman, J. T., McKenzie, V. J., Blaustein, A. R. and K. L. D. Richgels (2013). Urbanization and wetland communities: applying metacommunity theory to understand local and landscape effects. Journal of Applied Ecology 50: 34-42. PDF
Hoverman, J. T., Paull, S. H., and P. T. J. Johnson (2013). Does Climate Change Increase the Risk of Disease? Analyzing Published Literature to Detect Climate–Disease Interactions. In Pielke, R. Sr. (ed.), Climate Vulnerability: Understanding and Addressing Threats to Essential Resources, Vol. 4., Academic Press. DOI: http://dx.doi.org/10.1016/B978-0-12-384703-4.00406-8.
2012
Paull, S. H., LaFonte, B., and P. T. J. Johnson (2012). Temperature-driven shifts in a host-parasite interaction drive nonlinear changes in disease risk. Global Change Biology 18: 3558-3567. PDF" color="blue" size="small" style="regular" icon="fa-file-pdf-o"]PDF
Johnson, P. T. J. and J. T. Hoverman (2012). Parasite diversity and coinfection determine pathogen infection success and host fitness. Proceedings of the National Academy of Sciences 109: 9006-9011. PDF
Koprivnikar, J., Marcogliese, D. J., Rohr, J. R., Orlofske, S. A., Raffel, T. R. and P. T. J. Johnson (2012). Macroparasite infections of amphibians: what can they tell us? EcoHealth 9: 342-360. PDF
Lunde, K. B., Resh, V. T, and P. T. J. Johnson (2012). Using a whole-ecosystem manipulation to understand host-parasite interactions and how they vary with study venue. Ecosphere 3: 84. PDF
Hoverman, J. T., Mihaljevic, J. R., Richgels, K. L. D., Kerby, J. L. and P. T. J. Johnson (2012). Widespread co-occurrence of virulent pathogens within California amphibian communities. EcoHealth 9: 288-292. PDF
Preston, D. L., Orlofske, S. A., McLaughlin, J. P. and P. T. J. Johnson (2012). Food web including infectious agents for a California freshwater pond.Ecology 93: 1760. (data paper; Ecological Archives E093-153-D1). PDF
Paull, S. and P. T. J. Johnson (2012). Can we predict climate-driven changes to disease dynamics? Applications for theory and management in the face of uncertainty. Wildlife Conservation in a Changing Climate (J. F. Brodie, E. Post and D. Doak, eds.). University of Chicago Press.
Lunde, K. B. and P. T. J. Johnson (2012). A practical guide for the study of amphibian malformations and their causes. Journal of Herpetology 46: 429-441. PDF
Johnson, P. T. J. and J. T. Hoverman (2012). Parasite diversity and coinfection drive pathogen infection success and host fitness. Proceedings of the National Academy of Sciences 109: 9006-9011. [Faculty of 1000 Recommended] [2013 Mercer Award from Ecological Society of America].
Preston, D. L., Henderson, J. S. and P. T. J. Johnson (2012). Community ecology of invasions: direct and indirect effects of multiple invasive species on aquatic communities. Ecology 93: 1254-1261. PDF
Orlofske, S. A., Jadin, R., Preston, D. L., and P. T. J. Johnson (2012). Parasite transmission in complex communities: predators and alternative hosts alter pathogenic infections in amphibians. Ecology 93: 1247-1260. PDF
Preston, D. L. and P. T. J. Johnson (2012). Importance of native amphibians in the diet and distribution of the aquatic garter snake (Thamnophis atratus) in the San Francisco Bay Area of California. Journal of Herpetology 46: 221-227. PDF
Blaustein, A. R., Gervasi, S. S., Johnson, P. T. J., Hoverman, J. T., Belden, L. K., Bradley, P. W. and G. Y. Xie (2012). Ecophysiology meets conservation: understanding the role of disease in amphibian population declines. Philosophical Transactions of the Royal Society, Series B 367: 1688-1707. PDF
Johnson, P. T. J., Rohr, J. R., Hoverman, J. T., Kellermanns, E., Bowerman, J. and K. B. Lunde (2012). Living fast and dying of infection: host life history drives interspecific variation in infection and disease risk. Ecology Letters 15: 235-242. PDF
Paull, S. H., Song, S. J., McClure, K. M., Sackett, L. C., Kilpatrick, A. M. and P. T. J. Johnson (2012). From superspreaders to disease hotspots: linking transmission across hosts and space. Frontiers in Ecology and the Environment 10: 75-82. PDF
Johnson, P. T. J., Preston, D. L., Hoverman, J. T., Henderson, J. S., Paull, S. H., and Redmond, M. D. (2012). Species diversity reduces parasite infection through cross-generational effects on host density. Ecology 93: 56-64. PDF
2011
Hartson, R. B., Orlofske, S. A., Keller, V., Dillon, Jr., R. T., and P. T. J. Johnson (2011). Land use and wetland spatial position jointly determine amphibian parasite communities. EcoHealth 8: 485-500. PDF
Olden, J. D., Vander Zanden, M. J., and P. T. J. Johnson (2011). Assessing ecosystem vulnerability to invasive rusty crayfish (Orconectes rusticus) in freshwater environments. Ecological Applications 21: 2587-2599. PDF
Redmond, M. D., Hartson, R. B., Hoverman, J. T., de Jesus-Villaneueva, C. N. and P. T. J. Johnson (2011). Experimental exposure of Helisoma trivolvis and Biomphalaria glabrata (Gastropoda) to Ribeiroia ondatrae (Trematoda). Journal of Parasitology 97: 1055-1061. PDF
Goodman, B. A. and P. T. J. Johnson (2011). Disease and the extended phenotype: parasites control host performance and survival through induced changes in body plan. PLoS ONE 6: e20193. PDF
Locke, S. A., McLaughlin, J. D., Lapierre, A. R., Johnson, P. T. J. and D. J. Marcogliese (2011). Linking larvae and adults of Apharyngostrigea cornu,Hysteromorpha triloba and Alaria mustelae (Diplostomoidea, Digenea) using molecular data. Journal of Parasitology 97: 846-851. PDF
Rohr, J. R., Johnson, P. T. J., Paull, S. H., Raffel, T. R., Dobson, A. P., Kilpatrick, A. M., Ruiz-Moreno, D., Pascual, M. and M. B. Thomas (2011). Frontiers in climate change-disease research. Trends in Ecology and Evolution 26: 270-277. PDF
Johnson, P. T. J., Kellermanns, E., and J. Bowerman (2011). Critical windows of disease risk: amphibian pathology driven by developmental changes in host resistance and tolerance. Functional Ecology 25: 726-734. PDF
Romansic, J. M., Johnson, P. T. J., Searle, C. L., Johnson, J. E., Tunstall, T., Han, B. A., Rohr, J. R. and A. R. Blaustein (2011). Individual and combined effects of multiple pathogens on Pacific treefrogs. Oecologia 166: 1029-1041. PDF
Peñalva-Arana, D. C., Forshay, K. J., Johnson, P. T. J., Strickler, J. R. and S. I. Dodson (2011). Chytrid infection reduces thoracic beat and heart rate of Daphnia pulicaria. Hydrobiologia 668: 147-154. PDF
Blaustein, A. R., Han, B. A., Relyea, R. A., Johnson, P. T. J., Buck, J. C., Gervasi, S. S. and L. B. Kats (2011). The complexity of amphibian declines: understanding the role of cofactors in driving amphibian losses. Annals of the New York Academy of Sciences 1223: 108-119. PDF
Johnson, P. T. J. and S. Paull (2011). The ecology and emergence of disease in fresh waters. Freshwater Biology 56: 638-657. PDF
Paull, S. and P. T. J. Johnson (2011). How will climate change affect host-parasite interactions? Understanding differential responses of hosts and parasites. Freshwater Biology 56: 767-778. PDF
Johnson, P. T. J., McKenzie, V. J., Peterson, A. C., Kerby, J. L., Brown, J., Blaustein, A. R. and T. Jackson (2011). Regional decline of an iconic amphibian associated with elevation, land-use change, and invasive species.Conservation Biology 25: 556-566. PDF
Goodman, B. A. and P. T. J. Johnson (2011). Ecomorphology and disease: understanding the cryptic effects of parasitism on host habitat use, thermoregulation, and predator avoidance. Ecology 92: 542-548. PDF
Johnson, P. T. J. and I. D. Buller (2011). Parasite competition hidden by correlation coinfections: using field studies and experiments to understand parasite interactions. Ecology 92: 535-541. PDF
Daly, E. W. and P. T. J. Johnson (2011). Beyond immunity: quantifying the effects of host anti-parasite behavior on parasite transmission. Oecologia 165: 1043-1050. PDF
2010
Preston, D. L. and P. T. J. Johnson (2010). Ecological consequences of parasitism. Nature Knowledge 1: 39. PDF
Johnson, P. T. J. and J. Bowerman (2010). Do predators cause frog deformities? The need for an eco-epidemiological approach. Journal of Experimental Zoology 314B: 515-518. PDF
Krugner-Higby, L., Haak, D., Johnson, P. T. J., Shields, J. D., Jones, W. M., Reece, K. S., Meinke, T., Gendron, A. and J. A. Rusak (2010). Ulcerative disease outbreak in crayfish Orconectes propinquus linked to saprolegnia australis in Big Muskellunge Lake, Wisconsin. Diseases of Aquatic Organisms 91: 57-66. PDF
Johnson, P. T. J., Dobson, A., Lafferty, K. D., Marcogliese, D., Memmott, J., Orlofske, S., Poulin, R., and D. W. Thieltges (2010). When parasites become prey: ecological and epidemiological significance. Trends in Ecology & Evolution 25: 362-371. PDF
Johnson, P. T. J., and D. W. Thieltges (2010). Diversity, decoys and the dilution effect: how ecological communities affect disease risk. Journal of Experimental Biology 213: 961-970. PDF
Johnson, P. T. J., Townsend, A. R., McKenzie, V. J., Howarth, R., Rejmankova, E. and P. Glibert (2010). Linking environmental nutrient enrichment and disease emergence in humans and wildlife. Ecological Applications 20:16-29. PDF
Johnson, P. T. J., Reeves, M. K., Krest, S. K. and A. E. Pinkney (2010). A decade of deformities: advances in our understanding of amphibian malformations and their implications. In Sparling, Linder, Bishop, Krest (eds), Ecotoxicology of Amphibians and Reptiles, 2nd edtion. SETAC Press, Pensacola FL.
Blaustein, A. R. and P. T. J. Johnson (2010). When an infection turns lethal. Nature 465: 881-882. PDF
Solomon, C. T., Olden, J. D., Johnson, P. T. J., Dillon, R. T. Jr. and M. J. Vander Zanden (2010). Distribution and community-level effects of the Chinese mystery snail (Bellamya chinensis) in northern Wisconsin lakes. Biological Invasions 12: 1591-1605. PDF
Bowerman, J., Johnson, P. T. J., and T. Bowerman (2010). Sublethal predators and their injured prey: linking aquatic predators and severe limb abnormalities in amphibians. Ecology 91: 242-251. PDF
Gleason, F. H., Marano, A. V., Johnson, P. T. J., and W. W. Martin (2010). Blastocladian parasites of invertebrates. Fungal Biology Reviews 24: 56-67. PDF
2009
Gross, J. A., Johnson, P. T. J., Prahl, L. K. and W. H. Karasov (2009). Critical period of sensitivity for effects of cadmium on frog growth and development. Environmental Toxicology and Chemistry 28: 1227-1232. PDF
Johnson, P. T. J. (2009). The meaning behind malformed frogs. Conservation Biology 23: 508-511. PDF
Johnson, P. T. J., Ives, A. R., Lathrop, R. C. and S. R. Carpenter (2009). Long-term disease dynamics in lakes: causes and consequences of chytrid infections in Daphnia populations. Ecology 90: 132-144. PDF
Johnson, P. T. J., Lund, P. J., Hartson, R. B., and T. P. Yoshino (2009). Community diversity reduces Schistosoma mansoni transmission and human infection risk. Proceedings of the Royal Society of London, Series B 276: 1657-1663. PDF
Johnson, P. T. J., Olden, J. D., Solomon, C. T. and M. J. Vander Zanden (2009). Interactions amoung invaders: community and ecosystem effects of multiple invasive species in an experimental aquatic system. Oecologia 159: 161-170. PDF
Johnson, P. T. J. and R. B. Hartson (2009). All hosts are not equal: explaining differential patterns of malformations in an amphibian community. Journal of Animal Ecology 78: 191-201. PDF
2008
Johnson, P. T. J. and V. J. McKenzie (2008). Effects of environmental change on helminth infections in amphibians: exploring the emergence of Ribeiroia and Echinostoma infections in North America. Chapter 11 in Fried, B. and R. Toledo, The Biology of Echinostomes, Springer. PDF
Johnson, P. T. J., Hartson, R. B., Larson, D. J. and D. R. Sutherland (2008). Diversity and disease: community structure drives parasites transmission nad host fitness. Ecology Letters 11: 1017-1026. PDF
Forshay, K. J., Johnson, P. T. J., Stock, M., Penalva, C. and S. I. Dodson (2008). Festering food: chytridiomycete pathogen reduces quality of Daphnia hosts as a food resource. Ecology 89: 2692-2699. PDF
Refardt, D., Decaestecker, E., Johnson, P. T. J., and J. Vavra (2008). Morphology, molecular phylogeny, and ecology of Binucleata daphnia n. g., n. sp. (Fungi: Microsporidia), a parasite of Daphnia magna Straus, 1820 (Crustacea: Branchiopoda). Journal of Eukaryotic Microbiology 55: 393-408. PDF
Lafferty, K. D., Allesina, S., Arin, M., Briggs, C. J., DeLeo, G., Dobson, A. P., Dunne, J. A., Johnson, P. T. J., Kuris, A. M., Marcogliese, D. J., Martinez, N. D., Memmott, J., Marquet, P. A., McLaughlin, J. P., Mordecai, E. A., Pascual, M., Poulin, R., and D. W. Thieltges (2008). Parasites in food webs: the ultimate missing links. Ecology Letters 11: 533-546. PDF
Johnson, P. T. J., Olden, J. D. and M. J. Vander Zanden (2008). Dam invaders: hydrologic impoundments enhance ecosystem invasibility. Frontiers in Ecology and the Environment 6: 357-363. PDF
Perkins, S., Altizer, S., Bjornstad, O., Burdon, J., Clay, K., Gomez-Aparicio, L., Jeschke, J., Johnson, P. T. J., Lafferty, K., Malstrom, C., Martin, P., Power, A., Thrall, P., Strayer, D. and M. Uriarte (2008). Infectious disease in invasion biology. Chapter 8 in R. S. Ostfeld, F. Keesing, and V. T. Eviner, Infectious disease ecology: effects of ecosystems on disease and of disease on ecosystems. Princeton University Press, Princeton, NJ.
Johnson, P. T. J. and S. R. Carpenter (2008). Influence of eutrophication on disease in aquatic ecosystems: patterns, processes, and predictions. Chapter 4 (pp. 71-99) in R. S. Ostfeld, F. Keesing and V. T. Eviner (eds.), Infectious disease ecology: effects of ecosystems on disease and of disease on ecosystems. Princeton University Press, Princeton, NJ.
2007
Johnson, P. T. J., Chase, J. M., Dosch, K. L., Gross, J., Hartson, R. B., Larson, D., Sutherland, D. R. and S. R. Carpenter (2007). Aquatic eutrophication promotes pathogenic infection in amphibians. Proceedings of the National Academy of Sciences 104: 15781-15786. PDF
Roth, B. M., Kaplan, I. C., Sass, G. G., Johnson, P. T. J., Marburg, A. E., Yannarell, A. C., Havlicek, T. D., Willis, T. V., Turner, M. G. and S. R. Carpenter. (2007). Linking terrestrial and aquatic ecosystems: the role of woody habitat in lake food webs. Ecological Modelling 203: 439-452. PDF
Carpenter, S. R. B. J. Benson, R. Biggs, J. W. Chipman, J. A. Foley, S. A. Golding, R. B. Hammer, P. C. Hanson, P. T. J. Johnson, A. M. Kamarainen, T. K. Kratz, R. C. Lathrop, K. D. McMahon, B. Provencher, J. A. Rusak, C. T. Solomon, E. H. Stanley, M. G. Turner, M. J. Vander Zanden, C. H. Wu and H. Yuan. (2007). Understanding regional change: A comparison of two lake districts. BioScience 57: 323-335. PDF
2006
Johnson, P. T. J. (2006). Amphibian diversity: decimation by disease. Proceedings of the National Academy of Sciences, USA 103: 3011-3012. PDF
Johnson, P. T. J., Stanton, D. E., Preu, E. R., Forshay, K. J. and S. R. Carpenter. (2006). Dining on disease: how interactions between infection and environment affect predation risk. Ecology 87: 1973-1980. PDF
Johnson, P. T. J., Preu, E. R., Sutherland, D. R., Romansic, J., Han, B. and A. R. Blaustein. (2006). Adding infection to injury: Synergistic effects of predation and parasitism on salamander limb malformations. Ecology 87: 2227-2235. PDF
Johnson, P. T. J., Longcore, J. E., Stanton, D. E., Carnegie, R. B., Shields, J. D. and E. R. Preu. (2006). Chytrid infections of Daphnia pulicaria: Development, ecology, pathology and phylogeny of Polycaryum laeve. Freshwater Biology 51: 634-648. PDF
2005
Wilson, W. D., Johnson, P. T. J., Sutherland, D. R., Moné, H. and E. S. Loker. (2005). A molecular phylogenetic study of the genus Ribeiroia (Digenea): trematodes known to cause limb malformations in amphibians. Journal of Parasitology 91: 1040-1045. PDF
Fried, B. and P. T. J. Johnson (2005). In vitro excystment of the metacercariae of Ribeiroia ondatrae. Parasitology Research 95: 293-294. PDF
Johnson, P. T. J. and K. B. Lunde (2005). Parasite infection and limb malformations: A growing problem in amphibian conservation. Amphibian Declines: the Conservation Status of United States Species , M. J. Lannoo (ed). University of California Press: 124-138. PDF
2004
Johnson, P. T. J. and J. M. Chase (2004). Parasites in the food web: linking amphibian malformations and aquatic eutrophication. Ecology Letters 7: 521-526. PDF
Johnson, P. T. J., D. R. Sutherland, J. M. Kinsella and K. B. Lunde (2004). Review of the trematode genus Ribeiroia (Psilostomidae): Ecology, life history and pathogenesis with special emphasis on the amphibian malformation problem. Advances in Parasitology 57: 191-253. PDF
2003
Blaustein, A. R. and P. T. J. Johnson (2003). Explaining frog deformities. Scientific American 288: 60-65. PDF
Blaustein, A. R. and P. T. J. Johnson (2003). The complexity of deformed amphibians. Frontiers in Ecology and the Environment 1: 87-94. PDF
Johnson, P. T. J., Lunde, K. B., Zelmer, D. A. and J. K. Werner (2003). Limb deformities as an emerging parasitic disease in amphibians: Evidence from museum specimens and resurvey data. Conservation Biology 17: 1724-1737. PDF
Johnson, P. T. J. (2003). Biased sex ratios in fiddler crabs (Brachyura, Ocypodidae): A review and evaluation of the influence of sampling method, size class, and sex-specific mortality. Crustaceana 76: 559-580. PDF
Johnson, P. T. J. and D. R. Sutherland (2003). Amphibian deformities and Ribeiroia infection: An emerging helminthiasis. Trends in Parasitology 19: 332-335. PDF
Johnson, P. T. J. and E. G. Ritchie (2003). Macroinvertebrate fauna of an iron-rich stream in the Wet Tropics of Australia: a comparative assessment of communities using a Rapid Bioassessment Protocol. Memoirs of the Queensland Museum 49: 331-338. PDF
Bowerman, J. and P. T. J. Johnson (2003). Timing of trematodes-related malformations in Oregon spotted frogs and Pacific treefrogs. Northwestern Naturalist 84: 142-145. PDF
Lannoo M. J., Sutherland, D. R., Jones, P., Rosenberry, D., Klaver, R. W., Hoppe, D. M., Johnson, P. T. J., Lunde, K. B., Facemire, C., and J. M. Kapfer (2003). Multiple causes for the malformed frog phenomenon. In: ATSM STP 1443: G. Linder, Little, E., Krest, S. and D. Sparling (Eds). Multiple stressor effects in relation to declining amphibian populations. ASTM International, West Conshoshocken, PA.
2002
Johnson, P. T. J., Lunde, K. B., Thurman, E. M., Ritchie, E. G., Wray, S. W., Sutherland, D. R., Kapfer, J. M., Frest, T. J., Bowerman, J. and A. R. Blaustein (2002). Parasite (Ribeiroia ondatrae) infection linked to amphibian malformations in the western United States. Ecological Monographs 72: 151-168. PDF
2001
Johnson, P. T. J., Lunde, K. B., Haight, R. W., J. Bowerman, and A. R. Blaustein (2001). Ribeiroia ondatrae (Trematoda: Digenea) infection induces severe limb malformations in western toads (Bufo boreas). Canadian Journal of Zoology 79: 370-379. PDF
Johnson, P. T. J., Lunde, K. B., Ritchie, E. G., Reaser, J. K., and A. E. Launer (2001). Morphological abnormality patterns in a California amphibian community. Herpetologica 57: 336-352. PDF
1999
Johnson, P. T. J., Lunde, K. B., Ritchie, E. G. and A. E. Launer (1999). The effect of trematode infection on amphibian limb development and survivorship. Science 284: 802-804. PDF