Department of Entomology


J. Daniel Hareucr entomology

Emeritus Professor of Entomology


Research Specialization

Evolution and Ecology of Plant-Herbivore and Plant-Herbivore-Natural Enemy Interactions.  Most herbivorous arthropods are highly specialized and feed upon only a few of the host plant species available to them. We seek to better understand how such non-random associations evolved, are maintained, and vary in space and time. Our research ranges widely over many systems. We are particularly interested in learning the genetic basis of variation in the suitability of plant populations to support local insect populations. We also are interested in better understanding the genetic basis of the adaptations of insect populations to those plants A strong emphasis of my research also is in learning how host plant chemical variation affects the relationships between herbivores and their natural enemies.


BA Biological Science "With Distinction" 1970
Stanford University
PhD Ecology & Evolution 1978
State University of New York, Stony Brook


2008 - Elected Fellow, American Association for the Advancement of Science


Turcotte, Martin M., David N. Reznick, and J. Daniel Hare.  2011.  The impact of rapid evolution on population dynamics in the wild: Experimental test of eco-evolutionary dynamics.  Ecology Letters (in press.)

Hare, J. Daniel and Jia J. Sun. 2011. Production of induced volatiles by Datura wrightii in response to damage by insects: effect of herbivore species and time. Journal of Chemical Ecology 37:751-764.

Turcotte, Martin. M. David N. Reznick and J. Daniel Hare. 2011. Experimental Assessment of the Impact of Rapid Evolution on Population Dynamics. Evolutionary Ecology Research 13: 113-131.

Hare, J. Daniel and Jia J. Sun.  2011.  Production of Herbivore-Induced Plant Volatiles is Constrained Seasonally in the Field but Predation on Herbivores is not.  Journal of Chemical Ecology 37: 430-442.

Hare, J. Daniel.  2011.  Ecological role of volatiles produced by plants in response to damage by herbivorous insects.  Annual Review of Entomology 56: 161-180.

Hare, J. Daniel.  2010.  Ontogeny and season constrain the production of herbivore-inducible plant volatiles in the field.  Journal of Chemical Ecology 36: 1363-1374.

Allison, Jeremy D. and J. Daniel Hare. 2009. Learned and naïve natural enemy responses and the interpretation of volatile organic compounds as cues or signals (Tansley Review). New Phytologist 184: 768–782.

Hare, J. Daniel. 2008. Inheritance of leaf geranylflavanone production and seed production within and among chemically distinct populations of Mimulus aurantiacus. Biochemical Systematics and Ecology 36: 84-91.

Hare, J. Daniel. 2007. Variation in herbivore and methyl jasmonate-induced volatiles among genetic lines of Datura wrightii. Journal of Chemical Ecology. 33: 2028-2043.

Hare, J. Daniel and Linda L. Walling. 2006. Constitutive and jasmonate-Inducible traits of Datura wrightii. Journal of Chemical Ecology. 32: 29-47.

Hare, J. Daniel. 2005. Biological activity of acyl glucose esters from Datura wrightii glandular trichomes against three native insect herbivores. Journal of Chemical Ecology 31: 1475-1491.

Gassmann, A.J. and J. Daniel Hare. 2005. Indirect cost of a defensive trait: Variation in trichome type affects the natural enemies of herbivorous insects on Datura wrightii. Oecologia. 144: 62-71.

Hare, J. Daniel and J.L. Smith, II. 2005. Competition, herbivory, and reproduction of trichome phenotypes of Datura wrightii. Ecology 86: 334-339.

Smith, J.L. and J. Daniel Hare. 2004. Spectral properties, gas exchange, and water potential of leaves of glandular and non-glandular trichome types of Datura wrightii (Solanaceae). Functional Plant Biology 31: 267-273.

Hare, J. Daniel and E. Elle. 2004. Survival and Seed Production of Sticky and Velvety Datura wrightii in the Field: A five-year Study. Ecology 85: 615-622.

Hare, J. Daniel, E. Elle and N. M. van Dam. 2003. Costs of Glandular Trichomes in Datura wrightii: A Three-Year Study. Evolution. 57: 793-805.

Hare, J. Daniel and E. Elle. 2002. Variable Impact of Diverse Insect Herbivores on Dimorphic Datura wrightii. Ecology. 83: 2711-2720.

Hare, J. D. 2002. "Plant Genetic Variation in Tritrophic Interactions." Pp. 8 - 43 in T. Tscharntke & B. A. Hawkins, editors, Multitrophic Level Interactions. Cambridge University Press, Cambridge, U.K.

Hare, J. Daniel. 2002. Seasonal variation in the leaf resin components of Mimulus aurantiacus. Biochemical Systematics and Ecology 30: 709-720.

Hare, J. Daniel. 2002. Geographic and Genetic Variation in the Leaf Surface Resin Components of Mimulus aurantiacus from southern California. Biochemical Systematics and Ecology 30: 281-296.

Elle, E. and J. Daniel Hare. 2002. Environmentally Induced Variation in Floral Traits Affects the Mating System in Datura wrightii. Functional Ecology. 16: 79-88.

Forkner, R. E., and J. Daniel Hare. 2000. Genetic and Environmental Variation in Acyl Glucose Ester Production and Glandular and Nonglandular Trichome Densities in Datura wrightii. Journal of Chemical Ecology 28: 2801-2823.

Elle, E. and J. Daniel Hare. 2000. No benefit of glandular trichome production in natural populations of Datura wrightii? Oecologia 123: 57-65.

Hare, J. Daniel and D. J. W. Morgan. 2000. Chemical conspicuousness of an herbivore to its natural enemy: effect of feeding site selection. Ecology 81: 509-519.

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University of California, Riverside
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Riverside, CA 92521
Tel: (951) 827-1012

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417 Entomology Bldg.

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