Diane R. Campbell
Professor, Ecology & Evolutionary Biology
|Evolution in Natural Populations; Hybrid Zones; Plant-Pollinator Interactions|
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 volatile compounds, 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 due to volatiles, and nectar to test experimentally for correlational selection.
Prospective graduate students: Please contact me at firstname.lastname@example.org if you are interested in joining my lab.
|Publications||Raguso, R.A., Thompson, J.N., and D.R. Campbell. 2015. Improving our chemistry: Challenges and opportunities in the interdisciplinary study of floral volatiles. Natural Products Reports 32: 893-903.|
|Campbell, D.R. and J.M. Powers. 2015. Natural selection on floral morphology can be influenced by climate. Proceedings of the Royal Society B 282: 21050178.|
|Bischoff, M., R.A. Raguso, A. Jürgens and D.R. Campbell. 2015. Context-dependent reproductive isolation mediated by floral scent and color. Evolution 69:1-13.|
|Bruckman, D and D.R. Campbell. 2014. Floral neighborhood influences pollinator assemblages and effective pollination in a native plant. Oecologia 176: 465-476.|
|Abdala-Roberts, L., V. Parra-Tabla, D.R. Campbell, and K.A. Mooney. 2014. Soil fertility and parasitoids shape herbivore selection on plants. Journal of Ecology 102: 1120-1128.|
|Campbell, D.R., M. Forster, and M. Bischoff. 2014. Selection of trait combinations through bee and fly visitation to flowers of Polemonium foliosissimum. Journal of Evolutionary Biology 27: 325-336.|
|Bischoff, M., A. Jürgens, and D.R. Campbell. 2014. Floral scent in natural hybrids of Ipomopsis (Polemoniaceae) and their two parental species. Annals of Botany 113: 533-544.|
|Campbell, D.R. and M. Bischoff. 2013. Selection for a floral trait is not mediated by pollen receipt even though seed set in the population is pollen-limited. Functional Ecology, 27: 1117-1125.|
|Campbell, D.R. and C. Wendlandt. 2013. Altered precipitation affects plant hybrids differently than their parental species. American Journal of Botany 100: 1322-1331.|
|Sakai, A.K., S.G. Weller, D.R. Campbell, T.M. Culley, A.K. Dunbar-Wallis, and A. Andres. 2013. Measure for measure: comparing morphological and biomass traits for sex allocation in two gynodioecious species. American Journal of Botany 100: 1071-1082.|
|Bischoff, M., D.R. Campbell, J. M. Lord, and A. W. Robertson. 2013. The relative importance of solitary bees and syrphid flies as pollinators of two outcrossing plant species in the New Zealand alpine. Austral Ecology 38: 169-176.|
Campbell, D.R. and C.A. Wu. 2013. Geographical variation in hybridization of Ipomopsis (Polemoniaceae): Testing the role of photosynthetic responses to temperature and water.
International Journal of Plant Sciences 174: 57-64.
|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.|
SELECTED OLDER PUBLICATIONS:
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.
|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.|
|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.|
|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., 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.|
|Grant||Funded by NSF|
Society for the Study of Evolution
Ecological Society of America
Botanical Society of America
|Link to this profile||http://www.faculty.uci.edu/profile.cfm?faculty_id=2124|