Diane R. Campbell

Professor, Ecology & Evolutionary Biology
School of Biological Sciences

B.S., Stanford University

PhD, Duke University

Phone: (949) 824-2242
Fax: (949) 824-2181
Email: drcampbe@uci.edu

University of California, Irvine
459 Steinhaus Hall
Irvine, CA 92697

picture of Diane R. Campbell

Evolution in Natural Populations; Hybrid Zones; Plant-Pollinator Interactions
URLs lab website
AAAS Fellow
Fulbright Specialist 2011-2015
Associate editor for Functional Ecology 2010-2012
Reviewing editor for Journal of Evolutionary Biology 2003-2007
Elected to Council, Society for the Study of Evolution 1999-2001
Board of Trustees, Rocky Mountain Biological Laboratory 1998-2002
George Lamb Lecturer 1998
Associate editor for Evolution 1992-1994
My research interests are in the mechanisms of evolution in natural populations. In approaching this problem, I combine field experiments with laboratory analysis of genetic markers and computer modeling.

One major project focuses on hybrid zones in plants. Hybrid zones are areas where two related species mate and produce some viable hybrids. We have studied hybrid zones along elevational gradients between two species of Ipomopsis in the Colorado Rockies and between species of Penstemon in California. Two general approaches have been taken to explain stable hybrid zones. According to one model, hybrids are unfit due to genomic incompatibilities but this selective disadvantage is balanced by gene flow between species. Alternative models rely on some form of environmentally dependent selection. We are testing these models by following survival and reproductive success for parental and hybrid seed planted at several locations along elevational clines. We are also investigating the mechanisms responsible for these fitness differences to test two different models for speciation, one that relies on pollinator-mediated divergent selection and one that relies on divergent selection imposed by other features of the habitat. This requires us to take diverse approaches, from studying behavior of hummingbird pollinators to measuring physiological traits such as photosynthetic rate and water use efficiency. My lab is also using DNA markers to characterize the molecular structure of the hybrid zone. Other ongoing field projects in Colorado focus on the impact of pollination level on growth of plant populations, with implications for conservation of endangered species.

A second interest is in the evolution of breeding systems such as hermaphroditism and dioecy (separate sexes). One explanation for the remarkable diversity in plant breeding systems is offered by sex allocation theory. Currently I am collaborating with Ann Sakai and Stephen Weller on a quantitative genetic experiment involving artificial selection on sex allocation in Schiedea. We are investigating whether the evolutionary trend towards dioecy hypothesized on the basis of phylogenetic studies can be produced with artificial selection.

A third interest is in measuring selection for suites of floral traits. The idea that particular pollinators select not for single traits but for trait associations has a long history, but it has received little testing. We are studying behavior of insect pollinators in response to combinations of flower color, shape, scent, and nectar to test experimentally for correlational selection. Some of this work is in alpine New Zealand, a particularly interesting habitat because of the exceptionally high frequency of white flowers and unique flora.

Prospective graduate students: Please contact me at drcampbe@uci.edu if you are interested in joining my lab.
Publications Campbell, D.R., M. Bischoff, J.M. Lord, and A.W. Robertson. 2012. Where have all the blue flowers gone: pollinator responses and selection on flower colour in New Zealand Wahlenbergia albomarginata. Journal of Evolutionary Biology 25: 352-364.
  Pohl, N., J. VanWyk and D.R. Campbell. 2011. Butterflies show flower colour preferences but not constancy in foraging at four plant species. Ecological Entomology 36: 290-300.
  Campbell, D.R., Weller, S.G., A.K. Sakai, T. M. Culley, P.N. Dang, and A.K. Dunbar-Wallis. 2011. Genetic variation and covariation in floral allocation of two species of Schiedea with contrasting levels of sexual dimorphism. Evolution 65: 757-770.
  Waser, N.M., Campbell, D. R., Price, M.V., and A.K. Brody. 2010. Density-dependent demographic responses of a semelparous plant to natural variation in seed rain. Oikos 119: 1929-1935.
  Campbell, D.R., Wu, C.A. and S.E. Travers. 2010. Photosynthetic and growth responses of reciprocal hybrids to variation in water and nitrogen availability. American Journal of Botany 97: 925-933.
  Campbell, D.R., M. Bischoff, J. Lord, and A.W. Robertson. 2010. Flower color influences insect visitation in alpine New Zealand. Ecology 91: 2638-2649.
  Reithel, J.R. and D.R. Campbell. 2008. Effects of aggregation size and host plant on the survival of an ant-tended membracid (Hemiptera: Membracidae): Potential roles in selecting for generalized host plant use. Annals of the Entomological Society of America 101: 70-78.
  Burd, M., T.L. Ashman, D.R. Campbell, M.R. Dudash, M.O. Johnston, T.M. Knight, S.J. Mazer, R.J. Mitchell, J.A. Steets, and J.C. Vamosi. 2009. Ovule number per flower in a world of unpredictable pollination. American Journal of Botany 96: 1159-1167.
  Kimball, S. and D.R. Campbell. 2009. Physiological differences between two species of Penstemon and their hybrids in field and common garden environments. New Phytologist 181: 478-488.
  Campbell, D.R. 2009. Using phenotypic manipulations to study multivariate selection of floral trait associations. Annals of Botany 103: 1557-1566.
  Aldridge, G. and D.R. Campbell. 2009. Genetic and morphological patterns show variation in frequency of hybrids between Ipomopsis (Polemoniaceae) zones of sympatry. Heredity 102: 257-265.
  Kimball, S., D.R. Campbell, and C. Lessin. 2008. Differential performance of reciprocal hybrids in multiple environments. Journal of Ecology 96: 1306-1318.
  Campbell, D.R., N.M. Waser, G. Aldridge, and C.A. Wu. 2008. Lifetime fitness in two generations of Ipomopsis hybrids. Evolution 62: 2616-2627.
  Campbell, D.R. 2008. Pollinator shifts and the origin and loss of plant species. Annals of the Missouri Botanical Garden 95: 264-274.
  Price, M.V., D.R. Campbell, N.M. Waser, and A.K. Brody. 2008. Bridging the generation gap in plants: pollination, parental fecundity, and offspring demography. Ecology 89: 1596-1604.
  Sakai, A.K., S. G. Weller, T. M. Culley, D.R. Campbell, A.K. Dunbar-Wallis, A.K., and A. Andres. 2008. Sexual dimorphism and the genetic potential for evolution of sex allocation in the gynodioecious plant, Schiedea salicaria. Journal of Evolutionary Biology 21: 18-29.
  Price, M. V., Waser, N. M., Irwin, R. E., Campbell, D. R. and A. K. Brody. 2005. Temporal and spatial variation in pollination of a montance herb: a seven-year study. Ecology 86: 2106-2116.
  Ashman, T., T. M. Knight, J. Steets, P. Amarasekare, M. Burd, D. R. Campbell, M. R. Dudash, M. O. Johnston, S. J. Mazer, R. J. Mitchell, M. T. Morgan, and W. G. Wilson. 2004. Pollen limitation of plant reproduction: Ecological and evolutionary causes and consequences. Ecology 85: 2408-2421.
Campbell, D. R. and N. M. Waser. 2007. Evolutionary dynamics of an Ipomopsis hybrid zone: confronting models with lifetime fitness data. American Naturalist 169: 298-310.
  Aldridge, G. and D. R. Campbell. 2007. Variation in pollinator preference between two Ipomopsis contact sites that differ in hybridization rate. Evolution 61: 99-110.
  Weller, S.G., A.K. Sakai, T.M. Culley, D.R. Campbell, and A.K. Dunbar-Wallis. 2005. Predicting the pathway to wind pollination: heritabilities and genetic correlations of inflorescence traits associated with wind pollination in Schiedea salicaria (Caryophyllaceae). Journal of Evolutionary Biology 19: 331-342.
  Campbell, D.R., C. Galen, and C.A. Wu. 2005. Ecophysiology of first and second generation hybrids in a natural plant hybrid zone. Oecologia 144: 214-225.
  Wu, C.A. and D.R. Campbell. 2005. Cytoplasmic and nuclear markers reveal contrasting patterns of spatial genetic structure in a natural Ipomopsis hybrid zone. Molecular Ecology 14: 781-792.
  Campbell, D.R. and N.M. Waser. 2001. Genotype by environment interaction and the fitness of plant hybrids in the wild. Evolution 55: 669-676.
  Campbell, D.R. 2000. Experimental tests of sex allocation theory in plants. Trends in Ecology and Evolution 15: 227-231.
  Campbell, D. R., N. M. Waser, and E. J. Melendez-Ackerman. 1997. Analyzing pollinator-mediated selection in a plant hybrid zone: hummingbird visitation patterns on three spatial scales. American Naturalist 149: 295-315.
  Campbell, D. R. 1996. Evolution of floral traits in a hermaphroditic plant: field measurements of heritabilities and genetic correlations. Evolution 50: 1442-1453.
  Campbell, D. R., N. M. Waser, and M. V. Price. 1996. Mechanisms of hummingbird-mediated selection for flower width in Ipomopsis aggregata. Ecology 77: 1463-1472.
  Campbell, D. R. and K. J. Halama. 1993. Resource and pollen limitations to lifetime seed production in a natural plant population. Ecology 74:1043-1051.
Grants Funded by NSF
Current grants: NSF DEB Population and Evolutionary Processes “Ecological speciation and the physiological performance of plant hybrids in Ipomopsis.”
Society for the Study of Evolution
Ecological Society of America
Botanical Society of America
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Last updated 02/02/2012