Publications

Pleasants, J.M and K.S. Oberhauser. 2012. Milkweed loss in agricultural fields due to herbicide use: Effect on the Monarch Butterfly population. Insect Conservation and Diversity (March 12, doi: 10.1111/j.1752-4598.2012.00196x) pdf

Pleasants, J.M. and J.F. Wendel. 2010. Reproductive and pollination biology of the endemic Hawaiian cotton, Gossypium tomentosum (Malvaceae). Pacific Science 64(1): 45-55 pdf

Pleasants, J.M. and J.F. Wendel. 2005. Assessment of potential for gene flow between transgenic cotton and the endemic Hawaiian cotton. Report to EPA

J.S. Hawkins, J. Pleasants, and J.F. Wendel , 2005 Identification of AFLP markers that discriminate between cultivated cotton and the Hawaiian island endemic, Gossypium tomentosum Nuttall ex Seeman. Genetic Resources and Crop Evolution 52:1069-1078

Pleasants, J.M., R.L. Hellmich, G.P. Dively, M.K. Sears, D.E. Stanley-Horn, H.R. Mattila, J.E. Foster, P. Clark, and G.D. Jones. 2001. Corn pollen deposition on milkweeds in and near cornfields. PNAS 98:11919-11924 pdf

Sears, M.K., R. L. Hellmich, D.E. Stanley-Horn, K.S. Oberhauser, J.M. Pleasants, H. R. Mattila, B.D. Siegfried, and G.P. Dively. 2001. Impact of Bt corn pollen on Monarch butterfly populations: A risk assessment. PNAS 98:11937-11942 pdf

Oberhauser, K.S., M.D. Prysby, H.R. Mattila, D.E. Stanley-Horn, M.K. Sears, G.P. Dively, E. Olson, J.M. Pleasants, W.F. Lam, and R.L. Hellmich. 2001. Temporal and spatial overlap between Monarch larvae and corn pollen. PNAS 98:11913-11918 pdf

Pleasants, J.M. and R.J. Bitzer. 1999. Aggregation sites for adult European corn borers (Lepidoptera: Crambidae): A comparison of prairie and non-native vegetation. Environmental Entomology 28: 608-617.

Orr, D.B and J.M. Pleasants. 1996. The potential of native prairie species to enhance the effectiveness of the Ostrinia nubialalis parasitoid Macrocentrus grandii. Journal of the Kansas Entomological Society 62: 133-143.

Pleasants, J.M. 1995. The effects of Spring prairie burns on the western prairie fringed orchid, Platanthera praeclara. In Proceedings of the 14th North American Prairie Conference, D.C. Hartnett ed., Kansas State Univ. Press, pp67-73

Pleasants, J.M. 1994. A comparison of test statistics used to detect competitive displacement in body size. Ecology 75: 847-850.

Pleasants, J.M. and S.D. Moe. 1993. Floral display size and pollination of the western prairie fringed orchid, Platanthera praeclara. Lindleyana 8: 32-38.

Pleasants, J.M. and T.W. Jurik. 1992. Dispersion of seedlings of the prairie compass plant, Silphium laciniatum (Asteraceae). American Journal of Botany 79: 133-137.

Zhang, H., J.M. Pleasants, and T.W. Jurik. 1991. The development of leaf orientation in the compass plant, Silphium laciniatum. Bull. Torrey Bot. Club 118: 33-42.

Pleasants, J.M. 1991. Evidence for short-distance pollen dispersal in Asclepias syriaca. Functional Ecology 5: 75-82.

Pleasants, J.M. and M. Zimmerman. 1990. The effect of inflorescence size on pollinator visitation of Delphinium nelsonii and Aconitum columbianum. Collectanea Botanica 19: 21-39.

Pleasants, J.M., H.T. Horner, G.M.Y. Ng. 1990. A technique for labeling milkweed pollinia with 14C for tracking pollen dispersal. Functional Ecology 4: 823-827.

Jurik, T.W. and J.M. Pleasants. 1990. The effects of light and plant size on fate of seedlings of the prairie compass plant (Silphium laciniatum). Functional Ecology 4: 661-665.

Pleasants, J.M. 1990. Null models for competitive displacement: the fallacy of not focusing on the whole community. Ecology 71: 1078-1084.

Jurik, T.W., H. Zhang, and J.M. Pleasants. 1990. Ecophysiological consequences of non-random leaf orientation in the prairie compass plant, Silphium laciniatum. Oecologia 82: 180-186.

Pleasants, J.M. and B.Y. Pleasants. 1989. Reversed size dimorphism in raptors: Can we tell which sex changed size? Oikos 56: 287-288.

Pleasants, J.M., and J.F. Wendel. 1989. Genetic diversity in a clonal narrow endemic, Erythronium propullans, and its widespread progenitor, Erythronium albidum. Amer. J. Bot. 76: 1136-1151.

Pleasants, J.M. 1989. Optimal foraging in nectarivores: A test of the marginal value theorem. American Naturalist 134:51-71.

Pleasants, J.M., and B.Y. Pleasants. 1988. Reversed size dimorphism in raptors: evidence for how it evolved. Oikos 52:129-135.

Pleasants, J.M., and N. Waser. 1985. Bumblebee foraging at a "hummingbird" flower: reward economics and floral choice. American Midland Naturalist 114:283-291.

Pleasants, J.M. 1983. Nectar production patterns in Ipomopsis aggregata (Polemoniaceae). American Journal of Botany 70(10):1468-1475.

Pleasants, J.M., and S. Chaplin. 1983. Nectar production rates of Asclepias quadrifolia: causes and consequences of individual variation. Oecologia 59:232-238.

Pleasants, J.M., and M. Zimmerman. 1983. The distribution of standing crop of nectar: what does it really tell us? Oecologia 57:412-414.

Zimmerman, M., and J.M. Pleasants. 1982. Competition among pollinators: Quantification of available resources. Oikos 38:381-383.

Pleasants, J.M. 1982. Structure of plant and pollinator communities. In Handbook of Experimental Pollination Biology. C. E. Jones and R. J. Little eds. Van Nostrand Reinhold, pp. 375-393.

Pleasants, J.M. 1981. Bumblebee response to variation in nectar availability. Ecology 62:1648-1661. pdf

Pleasants, J.M. 1980. Competition for pollinators in Rocky Mountain Plant communities. Ecology 61:1446-1459. pdf

Pleasants, J.M., and B.. Pleasants. 1979. The super-territory hypothesis: a critique. Why there are so few bullies. American Naturalist 114:609-613.

Pleasants, J.M., and M. Zimmerman. 1979. Patchiness in the dispersion of nectar resources: Evidence for hot and cold spots. Oecologia 41:283-288.

Pleasants, J.M. 1977. Competition in a plant-pollinator system: An analysis of meadow communities in the Colorado Rocky Mountains. Ph.D. Dissertation, UCLA.