Work in the Orrock Lab centers around three themes: behavior, ecological interactions, and how space mediates ecological and evolutionary dynamics. Our work is particularly focused on questions where these three themes converge. For example, are invasive plants successful because they provide a predator-free refuge from which native consumers eat native plants? Although conservation corridors benefit plants by increasing seed dispersal, are these benefits offset by corridor-mediated changes in the foraging behavior of seed-eating consumers? The work we do is both basic and applied: we combine behavioral and spatial ecology to provide insight into the forces shaping communities and the ecological implications of rapid changes in landscape composition (e.g. by humans or invasive organisms). Research sites include the grasslands of California, longleaf pine forests in the southeastern U.S., and oak forests in the midwestern U.S.
Allan, B. F., H. P. Dutra, L. S. Goessling, K. Barnett, J. M. Chase, R. J. Marquis, G. Pang, G. A. Storch, R. E. Thach, and J. L. Orrock. In press. Invasive honeysuckle eradication reduces tick-borne disease risk by altering host dynamics.
Proceedings of the National Academy of Sciences USA
Conley, A. K., Watling, J. I., and J. L. Orrock. In press. Invasive plant alters ability to predict disease vector distribution.
Watling, J. I., C. R. Hickman, and J. L. Orrock. In press. Predators and invasive plants affect performance of amphibian larvae.
Orrock, J. L., L. Dill, A. Sih, J. Grabowski, S. Peacor, B. Peckarsky, E. Preisser, and E. Werner. In press. Predator effects in predator-free space: the remote effects of predators on prey.
The Open Ecology Journal
Watling, J. I., C. R. Hickman, E. Lee, K. Wang, and J. L. Orrock. In press. Lonicera maackii extracts increase mortality and alter behavior of some native amphibian larvae.
Watling, J. I., A. J. Nowakowski, M. A. Donnelly, and J. L. Orrock. In press. Meta-analysis reveals the importance of matrix composition for animals in fragmented habitat.
Global Ecology and Biogeography.
Haddad, N. M., B. Hudgens, E. I. Damschen, D. Levey, J. L. Orrock, J. Tewksbury, and A. Weldon. In press. Assessing both positive and negative effects of corridors. For: Perspectives from Source-Sink Dynamics.
Mulder, C. P. H., H. Jones, K. Kameda, C. Palmborg, S. Schmidt, J. Ellis, J. L. Orrock, A. Wait, D. A. Wardle, L. Yang, H. Young G, D. Croll, and E. Vidal. In presss. Impacts of seabirds on plant and soil properties.
For: Seabird islands: Ecology, Invasions, and Restoration. C. P. H. Mulder, W. B. Anderson, D. R. Towns, and P. J. Bellingham, editors. Oxford University Press.
Orrock, J. L., M. L. Baskett, and R. D. Holt. 2010. Spatial interplay of plant competition and consumer foraging mediate plant coexistence and drive the invasion ratchet.
Proceedings of the Royal Society B 277: 3307-3315.
Orrock, J. L. and J. I. Watling. 2010. Local community size mediates ecological drift and competition in metacommunities.
Proceedings of the Royal Society B 277: 2185-2191.
Mattos, K. J., and J. L. Orrock. 2010. Behavioral consequences of plant invasion: an invasive plant alters rodent anti-predator behavior.
Behavioral Ecology 21:556-561.
Sih, A., D. I. Bolnick, B. Luttbeg, J. L. Orrock, S. D. Peacor, L. M. Pintor, E. Preisser, J. S. Rehage, and J. R. Vonesh. 2010. Predator-prey naivete, antipredator behavior, and the ecology of predator invasions.
Orrock, J. L. 2010. When the ghost of predation has passed: do rodents from islands with and without fox predators exhibit aversion to fox cues?
Orrock, J. L. and C. C. Christopher. 2010. Density of intraspecific competitors determines the occurrence and benefits of accelerated germination.
American Journal of Botany 97:694-699.
Orrock, J. L., R.D. Holt, and M. L. Baskett. 2010. Refuge-mediated apparent competition in plant-consumer interactions.
Ecology Letters 13:11-20.
Orrock, J. L. and M. S. Witter. 2010. Multiple drivers of apparent competition reduce re-establishment of a native plant in invaded habitats.
Watling, J. I. and J. L. Orrock. 2010. Measuring edge contrast using biotic criteria helps define edge effects on the density of an invasive plant.
Landscape Ecology 25:69-78.
Motheral, S. M., and J. L. Orrock. 2010. Gastropod herbivore preference for seedlings of two native and two exotic grass species.
American Midland Naturalist 163:106-114.
Heldermon, C. D., K. K. Ohlemiller, E. D. Herzog, C. Vogler, E. Y. Qin, D. F. Wozniak, Y. Tan, J. L. Orrock, and M. S. Sands. 2010. Therapeutic efficacy of bone marrow transplant, intracranial AAV-mediated gene therapy or both in the mouse model of MPS IIIB.
Molecular Therapy 18:873-880.
Orrock, J. L. and B. J. Danielson. 2009. Temperature and cloud cover, but not predator urine, affect winter foraging of mice.
Orrock, J. L. and J. L. Hoisington-López. 2009. Mortality of exotic and native seeds in invaded and uninvaded habitats.
Acta Oecologica 35: 758-262.
Seabloom, E. W., E. T. Borer, B. A. Martin, and J. L. Orrock. 2009. Effects of long-term consumer manipulations on invasion in oak savannah communities.
Ecology 90: 1356-1365.
Vellend, M. and J. L. Orrock. 2009. Ecological and genetic models of diversity: Lessons across disciplines. Pages 439-461 in: The Theory of Island Biogeography Revisited. J. Losos and R. E. Ricklefs, editors. Princeton University Press.
Orrock, J. L., M. S. Witter, and O. J. Reichman. 2009. Native consumers and seed limitation constrain the restoration of a native perennial grass in exotic habitats.
Restoration Ecology 17: 148-157.
Damschen, E. I., L. A. Brudvig*, N. M. Haddad, D. J. Levey, J. L. Orrock, and J. J. Tewksbury. 2008. The movement ecology and dynamics of plant communities in fragmented landscapes.
Proceedings of the National Academy of Sciences USA 105: 19078-19083.
Orrock, J. L., J. H. Grabowski, S. D. Peacor, B. L. Peckarsky, E. L. Preisser, A. Sih, and E. E. Werner. 2008. Consumptive and non-consumptive effects of predators on metacommunities of competing prey.
Ecology 89: 2426-2435.
Peckarsky, B. L., D. I. Bolnick, L. M. Dill, J. H. Grabowski, B. Luttbeg, J. L. Orrock, S. D. Peacor, E. L. Preisser, O. J. Schmitz, and G. C. Trussell. 2008. Revisiting the classics: Considering non-consumptive effects in textbook examples of predator-prey interactions.
Ecology 89: 2416-2425.
Orrock, J. L., M. S. Witter, and O. J. Reichman. 2008. Apparent competition with an exotic plant reduces native plant establishment.
Ecology 89: 1168-1174.
Orrock, J. L. and B. A. Allan. 2008. Sin Nombre virus infection in deer mice, Channel Islands, California.
Emerging Infectious Diseases 14: 1965-1966.
Preisser, E. L., J. L. Orrock, and O. J. Schmitz. 2007. Predator hunting mode and habitat domain affect the strength of non-consumptive effects in predator-prey interactions.
Ecology 88: 2744-2751.
Orrock, J. L. and E. I. Damschen. 2007. The effect of burial depth on removal of seeds of Phytolacca americana.
Southeastern Naturalist 6: 151-158.
Orrock, J. L. 2006. Useful distraction: Ritualized behavior as an opportunity for recalibration.
Behavioral and Brain Sciences 29: 625-626.
Orrock, J. L., D. J. Levey, B. J. Danielson, and E. I. Damschen. 2006. Seed predation, not seed dispersal, explains the landscape-level abundance of an early-successional plant.
Journal of Ecology 94: 838-845.
Damschen, E. I., N. M. Haddad, J. L. Orrock, D. J. Levey, and J. J. Tewksbury. 2006. Corridors increase plant species richness at large scales.
Science 313: 1284-1286.
Orrock, J. L. and R. J. Fletcher, Jr. 2005. Changes in community size affect the outcome of competition.
American Naturalist 166: 107-111.
Orrock, J. L. 2005. Conservation corridors affect the fixation of novel alleles.
Conservation Genetics 6: 623-630.
Orrock, J. L. and E. I. Damschen. 2005. Corridors cause differential seed predation.
Ecological Applications 15: 793-798.
Orrock, J. L. and B. J. Danielson. 2005. Patch shape, connectivity, and foraging by the oldfield mouse, Peromyscus polionotus.
Journal of Mammalogy 86: 569-575.
Orrock, J. L. 2005. The effect of gut passage by two species of avian frugivores on seeds of Pokeweed, Phytolacca americana.
Canadian Journal of Botany 83: 427-431.
Orrock, J. L. and E. I. Damschen. 2005. Fungi-mediated mortality of seeds of two oldfield plant species.
Journal of the Torrey Botanical Society 132: 613-617.
Orrock, J. L. and B. J. Danielson. 2005. A note on the status of the endangered red-backed vole, Clethrionomys gapperi, in Iowa.
Journal of the Iowa Academy of Science 112: 24-25.
Brinkerhoff, R. J., N. M. Haddad, and J. L. Orrock. 2005. Corridors and olfactory predator cues affect small mammal behavior.
Journal of Mammalogy 86: 662-669.
Orrock, J. L. and B. J. Danielson. 2004. Rodents balancing a variety of risks: invasive fire ants and indirect and direct indicators of predation risk.
Oecologia 140: 662-667.
Orrock, J. L., B. J. Danielson, and J. Brinkerhoff. 2004. Rodent foraging is affected by indirect, but not by direct, cues of predation risk.
Behavioral Ecology 15: 433-437.
Orrock, J. L., B. J. Danielson, M. J. Burns, and D. J. Levey. 2003. Spatial ecology of predator-prey interactions: corridors and patch shape influence seed predation.
Ecology 84: 2589-2599.
Orrock, J. L., D. Farley, and J. F. Pagels. 2003. Does fungus consumption by the woodland jumping mouse vary with habitat or the abundance of other small mammals? Canadian Journal of Zoology 81: 753-756.
McShea, W. J., J. F. Pagels, J. L. Orrock, E. Harper, and K. Koy. 2003. Mesic deciduous forest as patches of small mammal richness within an Appalachian mountain forest. Journal of Mammalogy 84: 627-643.
Orrock, J. L. and J. F. Pagels. 2003. Tree communities, microhabitat characteristics, and small mammals associated with the endangered rock vole, Microtus chrotorrhinus, in Virginia.
Southeastern Naturalist 2: 547-558.
Tewksbury, J. J., D. J. Levey, N. M. Haddad, S. Sargent, J. L. Orrock, A. Weldon, B. J. Danielson, J. Brinkerhoff, E. I. Damschen, and P. Townsend. 2002. Corridors affect plants, animals, and their interactions in fragmented landscapes.
Proceedings of the National Academy of Sciences USA 99: 12923-12926.
Orrock, J. L. and J.F. Pagels. 2002. Fungus consumption by the southern red-backed vole, Clethrionomys gapperi, in the southern Appalachians.
American Midland Naturalist 147: 413-418.
Orrock, J. L., J.F. Pagels, W.J. McShea, and E.K. Harper. 2000. Predicting presence and abundance of a small mammal species: the effect of scale and resolution.
Ecological Applications 10: 1356-1366.
Orrock, J. L., E.K. Harper, J.F. Pagels, and W.J. McShea. 1999. Additional records of the rock vole, Microtus chrotorrhinus (Mammalia: Muridae), in Virginia.
Banisteria: Journal of the Virginia Natural History Society 14: 36-38.