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Paulette Bierzychudek

William Swindells, Sr. Professor of Natural Sciences

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    Copyright, Steve Hambuchen

Biology-Psychology Hall

I’m a population biologist, and I work in the areas of ecology, evolution, and conservation biology. I teach and advise students in both Biology and Environmental Studies. I have undergraduate degrees in botany and in zoology from the University of Washington in Seattle, and a Ph.D. in ecology and evolutionary biology from Cornell University. I joined the faculty of Lewis & Clark College in 1995, after 15 years at Pomona College. For more information about my professional background, see my vita.


Biology 141
Biology 335
Biology 390


Publications (* indicates student co-author):

  • Schemske, D. W. and P. Bierzychudek. 2007. Spatial differentiation for flower color in the desert annual Linanthus parryae: was Wright right? Evolution 61(11):2528-2543. (this paper was the focus of a “News of the Week” piece in Science on October 19, 2007: Pennisi, E. 2007. Natural selection, not chance, paints the desert landscape. Science 318:376)
  • Kruse, R.*, Bend, E.*, and P. Bierzychudek. 2004. Native plant regeneration and introduction of non-natives following post-fire rehabilitation with straw mulch and barley seeding. Forest Ecology and Management 196(2-3):299-310.
  • Johnson, E.B*, P. Bierzychudek, and H.H. Whiteman. 2003. Potential of prey size and type to affect foraging asymmetries in tiger salamander larvae (Ambystoma tigrinum nebulosum). Canadian Journal of Zoology 81:1726-1735.
  • Schemske, D. W. and P. Bierzychudek. 2001. Evolution of flower color in the desert annual Linanthus parryae: Wright revisited. Evolution 55(7): 1269-1282.
  • Turelli, M., D. W. Schemske, and P. Bierzychudek. 2001. Stable two-allele polymorphisms maintained by fluctuating fitnesses and seed banks: protecting the blues in Linanthus parryae. Evolution 55(7): 1283-1298.
  • Bierzychudek, P. 1999. Looking backwards: assessing the projections of a transition matrix model. Ecological Applications 9(4):1278-1287.
  • Roy, B.A. and P. Bierzychudek. 1993. The potential for rust infection to cause natural selection in apomictic Arabis holboelli (Brassicaceae). Oecologia 95:533-541.
  • Bierzychudek, P. 1990. Demographic consequences of sexuality and apomixis in Antennaria. pp. 293- 307 In: Kawano, S. (ed.) Biological Approaches and Evolutionary Trends in Plants, Academic Press, London.
  • Bierzychudek, P. 1990. The adaptive significance of sexual reproduction in plants. pp. 51-91 In: Mangel, M. (ed.) Some mathematical questions in biology – sex allocation and sex change: experiments and models. American Mathematical Society, Providence, R. I.
  • Bierzychudek P. 1989. Environmental sensitivity of sexual and apomictic Antennaria: do apomicts have general-purpose genotypes? Evolution 43(7): 1456-1466.
  • Bierzychudek P. and V. Eckhart*. 1988. Spatial segregation of the sexes of dioecious plants. American Naturalist 132:34-43.
  • Bierzychudek, P. 1987. Resolving the paradox of sexual reproduction: a review of experimental tests. pp. 163-174 in: Stearns, S. (ed.) The Evolution of Sex and Its Consequences. Birkhauser-Verlag, Basel.
  • Bierzychudek, P. 1987. Patterns in plant parthenogenesis. pp. 197-217 in: Stearns, S. (ed.) The Evolution of Sex and Its Consequences. Birkhauser-Verlag, Basel.
  • Bierzychudek, P. 1987. Pollinators increase the cost of sex by avoiding female flowers. Ecology 68(2):444-447.
  • Bierzychudek, P. 1985. Patterns in plant parthenogenesis. Experientia 41:1255-1264.
  • Bierzychudek, P. 1984. Determinants of gender in jack-in-the-pulpit: the influence of plant size and reproductive history. Oecologia 65(1): 14-18.
  • Bierzychudek, P. 1984. Assessing “optimal” life histories in a fluctuating environment: the evolution of sex-changing by jack-in-the-pulpit. American Naturalist 123:829-840.
  • Bierzychudek, P. 1982. The demography of jack-in-the-pulpit, a forest perennial that changes sex. Ecological Monographs 52-335-351. (later excerpted in BioScience 33:196-197).
  • Bierzychudek, P. 1982. Life histories and demography of temperate forest herbs: a review. New Phytologist 90:757-776.
  • Best, L. and P. Bierzychudek. 1982. Pollinator foraging on foxglove (Digitalis purpurea): a test of a new model. Evolution 36(1): 70-79.
  • Bierzychudek, P. 1981. Asclepias, Lantana, and Epidendrum: a floral mimicry complex? Reproductive Botany, supplement to Biotropica: 54-58.
  • Bierzychudek, P. 1981. Pollinator limitation of plant reproductive effort. American Naturalist 117: 838- 840.

Academic Credentials

Ph.D. 1981 Cornell University, B.S., B.A. 1974 University of Washington

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