Professor of Biology
Department of Biology
University of California
Riverside, CA 92521

Office: 209 University Laboratory Building
Phone (951) 827-5820


Ph.D., University of Pennsylvania, 1980


Select Publications

Eco-Evo Interactions
Palkovacs, E. P., Marshall, M. C., Lamphere B. A., Lynch, B. R., Weese, D. J., Fraser, D. F., Reznick, D. N., Pringle, C. M., Kinnison, M. T.  2009.  Experimental evaluation of evolution and coevolution as agens of ecosystem change in Trinidadian streams. Philosophical Transactions of the Royal Society B- Biological Sciences 364: 1617-1628.  

Bassar, R. D., M. Marshall, A. Lopez-Sepulcre, R. Zandona, S. K. Auer, J. Travis, C. M. Pringle, A. S. Flecker, S. A. Thomas, D. F. Fraser and D. N. Reznick.  2010.  Local adaptation in Trinidadian Guppies alters ecosystem processes.  P. N. A. S. 107: 3616-3621.
      *Hynes Award for Young Investigators, Society for Freshwater Science                  *Runner up Thomas M. Frost Award for Excellence in Graduate Research-ESA

Turcotte, M. M., D. N. Reznick and J. D. Hare.  2011. Experimental assessment      of the impact of rapid evolution on population dynamics.  Evolutionary Ecology      Research 13: 113-131.

Zandona, E., S. Auer, S. Kilham, J. Howard, A. Lopez-Sepulcre, M. O’Connor, R.     D. Bassar, A. Osorio, C. Pringle and D. N. Reznick. 2011. Diet quality and prey      selectivity correlate with life histories and predation regime in Trinidadian             guppies.  Functional Ecology 25: 964-973.

El-Sabaawi, R. W., E. Zandona, T. J. Kohler, M. C. Marshall, J. M. Moslemi, J. Travis, A. Lopez-Sepulcre, R. Ferriere, C. M. Pringle, S. A. Thomas, D. N.             Reznick and A. S. Flecker.  2012. Widespread intraspecific organismal             stoichiometry among populations of the Trinidadian guppy.  Functional Ecology 26: 666-676.

El-Sabaawi, R. W., T. J. Kohler, E. Zandona, J. Travis, M. C. Marshall, S. A. Thomas, D. N. Reznick, M. Walsh, J. F. Gilliam, C. Pringle and A. S. Flecker.  2012. Environmental and organismal predictors of intraspecific variation in stoichiometry of a neotropical freshwater fish.  PLOS ONE 7: Article Number e32713.

Bassar, R. D., R. Ferriere, A. Lopez-Sepulcre, M. Marshall, J. Travis, C. Pringle and D. N. Reznick. 2012. Direct and indirect ecosystem effects of evolutionary adaptation in the Trinidadian guppy (Poecilia reticulata).  American Naturalist 180: 167-185.

 Auer, S. K., A. Lopez-Sepulcre, T. Heatherly, T. J. Kohler, R. D. Bassar, S. A. Thomas and D. N. Reznick.  2012. Life histories have a history: effects of past  and present conditions on adult somatic growth rates in wild Trinidadian guppies. J. Animal Ecology 81: 818-826.
      *Elton prize winner, British Ecological Society

Kohler, T. J., T. N. Heatherly, R. W. El-Sabaawi, E. Zandona, M. C. Marshall, A. S. Flecker, C. M. Pringle, D. N. Reznick and S. A. Thomas.  2012. Flow,           nutrients, and light availability influence neotropical epilithon biomass and             stoichiometry.  Freshwater Science 31: 1019-1034.

Marshall, M.,  A. J. Binderup, E. Zandona, S. Goutte, R. D. Bassar, R. W. El-            Sabaawi, S. Thomas, A. S. Flecker, S. S. Kilham, D. N. Reznick, C. M. Pringle. 2012. Effects of consumer interactions on benthic resources and ecosystem       processes in a Neotrophical stream.  Plos One 7, Article Number e45230 DOI: 10.1371/journal.pone.oo45230.

Bassar, R. D., A. Lopez-Sepulcre, D. N. Reznick and J. Travis.  2013.            Experimental evidence for density-dependent regulation and selection on             Trinidadian guppy life histories. American Naturalist 181: 25-38.

Turcotte, M. M., D. Reznick and D. J. Hare. 2013. Experimental test of an eco- evolutionary dynamic loop between evolution and population density in the green peach aphid. American Naturalist 181: S46-s57.        

Reznick, D. N.  2013. A critical look at reciprocity in ecology and evolution:             introduction to the symposium.  American Naturalist 181: S1-S8.

Travis, J., D. N. Reznick, R. D. Bassar, A.  Lopez-Sepulcre, R. Ferriere and T. Coulson.  2014.  Do eco-evo feedbacks help us understand nature? Answers from studies of the Trinidadian guppy.  Advances in Ecology, in press. (May 2014)

Life History Evolution
Reznick, D. N
., H. Bryga, and J. Endler. 1990. Experimentally induced life‑history in a natural population.  Nature 346:357‑359.

Reznick, D. N., M. J. Butler IV, F. H. Rodd, and P. Ross.  1996.  Life history evolution in guppies (Poecilia reticulata).  6. Differential mortality as a mechanism for natural selection.  Evolution 50:1651-1660.

Reznick, D. N., F. H. Shaw, F. H. Rodd, and R. G. Shaw.  1997.  Evaluation of the rate of evolution in natural populations of guppies (Poecilia reticulata).  Science 275:1934-1937.

Reznick, D., M. J. Butler IV, and H. Rodd.  2001.  Life history evolution in guppies 7: The comparative ecology of high and low predation environments.  American Naturalist 157: 126-140.

Walsh, M. and D. N. Reznick.  2008.  Interactions between the direct and indirect effects of predators determine life history evolution in a killifish.  PNAS 105: 594-599.

Walsh, M. R. and D. N. Reznick.  Phenotypic diversification across an environmental gradient: A role for predators and resource availability on the evolution of life histories.  Evolution 63: 3201-3213.

Walsh, M. R. and D. N. Reznick2010. Influence of the indirect effects of guppies on life history evolution in Rivulus hartiiEvolution 64: 1583-1593.

Walsh, M. R. and D. N. Reznick.  2011.  The direct and indirect effects of guppies: implications for life history evolution in Rivulus hartii.  Functional Ecology 25: 227-237.

Walsh, M. R. and D. N. Reznick.  2011. Experimentally induced life-history evolution in a killifish in response to the introduction of guppies.  Evolution 65: 1021-1036.

Reznick, D. N.  2011.  Guppies and the empirical study of adaptation.  Pp. 205-232 in In the Light of Evolution:  essays from the laboratory and field, J. B. Losos, ed.  Roberts and Company, Greenwood Village, CO

Furness, A. I., M. R. Walsh and D. N. Reznick.  2012.  Convergence of life history phenotypes in a Trinidadian killifish (Rivulus hartii).  Evolution 66: 1240-1254.

Reznick, D. N.,  R. D. Bassar, J. Travis and H. F. Rodd.  2012.  Life history             evolution in guppies VIII: The demographics of density regulation in guppies (Poecilia reticulata).  Evolution 66: 2903-2915.

Reznick D. N.  2012.  Evolution of life histories.  In Princeton Guide to Evolution, J. Losos ed. Princeton University Press, Princeton NJ

Reznick, D. N.  1993.  New model systems for studying the evolutionary biology of aging. Genetica 91:79-88.

Reznick, D., C. Ghalambor, and L. Nunney.  2002.  The evolution of senescence in fish. Mechanisms of Aging and development 123: 773-789.

Bryant, M.and D. N. Reznick. 2004. Comparative Studies of Senescence in Natural Populations of Guppies. American Naturalist 163: 55-66.

Reznick, D. N., Bryant, M., Roff D. A., Ghalambor, G. and Ghalambor, D. E.  2004.  Effects of extrinsic mortality on the evolution of senescence in guppies.  Nature 431: 1095-1099.

Reznick, D. N., M. J. Bryant, and D. Holmes.  2006.  The evolution of senescence and post- reproductive lifespan in guppies (Poecilia reticulata).  PLOS-Biology 4: 136-143.

Evolution of Placentas
Reznick, D. N., M. Mateos, and M. S. Springer.  2002.  Independent origins and rapid evolution of the placenta in the fish genus Poeciliopsis.  Science 298: 1018-1020.

M. J. O’Neill, B. R. Lawton, M. Mateos, D. M. Liscinsky, G. C. Ferreri, T. Hrbek, R. W. Meredith, D. N. Reznick, R. J. O’Neill.  2008.  Ancient and continuing Darwinian selection on Insulin-like growth factor II in placental fishes.  PNAS 104: 12104-12109.

Banet, A. I. and D. N. Reznick.  2008.  Do Placental Species Abort Offspring?  Testing an Assumption of the Trexler-DeAngelis Model.  Functional Ecology 22: 323-331.

Pollux, B. J. A., Pires, M. N., Banet, A. I, and Reznick, D. N.  2009. Evolution of placentas in the fish family Poeciliidae: An empirical study of macroevolution.  Annual Reviews of Ecology and Systematics 40: 271-289.

Pires, M. N., J. Arendt and D. N. Reznick.  2010.  The evolution of placentas and superfetation in the fish genus Poecilia (Cyprinodontiformes: Poeciliidae: subgenera Micropoecilia and Acanthocephalus).  Biological Journal of the Linnean Society 99: 784-796.

Meredith, R. W., M. N. Pires, D. N. Reznick and M. S. Springer.  2010. Molecular phylogenetic relationships and the evolution of the placenta in Poecilia (Micropoecilia) (Poeciliidae: Cyprindontiformes).  Molecular Phylogenetics and Evolution 55: 631-639.

Banet, A. I., A. J. Au and D. N. Reznick.  2010.  Is mom in charge? Implications of resource provisioning on the evolution of the placenta.  Evolution 64: 3172-3182.

Meredith, R. W., M. N. Pires, D. N. Reznick and M. S. Springer.  2011.  Molecular phylogenetic relationships and the coevolution of placentotrophy and superfetation in Poecilia (Poeciliidae: Cyprinodontiformes).  Molecular Phylogenetics and Evolution 59: 148-157.

Pollux, B. J. A. and D. N. Reznick. 2011.  Matrotrophy limits a female’s ability to adaptively adjust offspring size and fecundity in fluctuating environments.  Functional Ecology 25: 747-756.

Pires, M. N., R. D. Bassar, K. E. McBride, J. U. Regus, T. Garland and D. N. Reznick. 2011.  Why do placentas evolve? An evaluation of the life-history facilitation hypothesis in the fish genus Poeciliopsis.  Functional Ecology 25: 757-768.

Panhuis, T. M., G. Broitman-Maduro, J. Uhrig, M. Maduro, and D. N. Reznick.  2011. Analysis of expressed sequence tags from the placenta of the live-bearing fish Poeciliopsis (Poeciliidae).  J. of Heredity 102: 352-361.

Regus, J. U., J. B. Johnson, S. A. Webb and D. N. Reznick.  2013.  Comparative life histories of  fish in the genus Phallichthys (Pisces: Poeciliidae). J. of Fish Biology 83: 144-155.

Bassar, R. D., S.Auer and D. N. Reznick.  Why do placentas evolve?  A test of the life history facilitation hypothesis in two clades in the genus Poeciliopsis             representing two independent origins of placentas.  Functional Ecology, in press (12/13)

Pollux, B. J. A., R. W. Meredith, M. S. Springer and D. N. Reznick. 2014. The             evolution of the placenta drives a shift in sexual selection in livebearing fish.  Nature, in press. (05/14)

Conservation Biology
Reznick, D. N. and C. Ghalambor.  2001.  The population ecology of contemporary adaptation: What empirical studies reveal about the conditions that promote adaptive evolution. Genetica 112/113: 183-198.

Reznick, D. N., L. Nunney, and H. Rodd.  2004. Empirical evidence for rapid evolution.  In Evolutionary Conservation Biology, (D. Couvet, U. Diekman, and R. Ferrier, eds).Cambridge University Press.

Reznick, D. N. and C. Ghalambor.  2005.  Can commercial fishing cause evolution?  Answers from guppies.  Canadian Journal of Fisheries and Aquatic Sciences 62: 791-801.

Reznick, D. N., C. K. Ghalambor, K. Crooks.  2008.  Understanding the Evolutionary Consequences of Predator Removal in Natural Communities: Experimental Studies of Evolution in Guppies as a Model System.  Molecular Ecology 17: 97-107.

Perspectives and Reviews
Reznick, D. N.  1985.  Costs of reproduction:  an evaluation of the empirical evidence.  Oikos. 44:257‑267.

Reznick, D. N. and J. Travis.  1996.  The empirical study of adaptation in natural populations.   In:  Adaptation, (M. R. Rose and G. V. Lauder, eds.).  Academic Press, San Diego, CA, pp. 243-290.

Reznick, D. N., L. Nunney and A. Tessier.  2000.  Big houses, big cars, superfleas and the costs of reproduction.  Trends in Ecology and Evolution 15: 421-425.

Reznick, D. N. and R. E. Ricklefs.  2009.  Darwin’s bridge between microevolution and macroevolution.  Nature 457: 837-842.

Travis, J. and D. Reznick.  2009.  Adaptation.  In Evolution – The first four billion years.  M. Ruse and J. Travis, eds.  Harvard University Press.

Reznick, D. N.  2009.  The Origin Then and Now: An Interpretive Guide to the Origin of Species.  Princeton University Press.