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University of Wyoming

Amy Krist

Associate Research Scientist
Evolutionary Ecology

Education

  • B.A. Biology, State University of New York at Potsdam
  • B.A. History, State University of New York at Potsdam
  • Ph.D. Ecology and Evolutionary Biology, Indiana University

Research Interests

  • In my research, I seek to develop our understanding of host-parasite relationships and the biology of invasions in an ecological and evolutionary context. For example, I study the role of ecological stoichiometry in the success of the non-native New Zealand mud snail and the ecological and evolutionary consequences of the introduction of lake trout to zooplankton in Yellowstone Lake. Using snail-trematode interactions, I also study the consequences of parasitism to the evolution of host-life histories and how varying the stoichiometry of food alters the outcome of snail-trematode interactions.

Current Graduate Students

  • Michele Larson- Ph.D. student: invasion biology of Potamopyrgus antipodarum
  • Tonya Chamberlain - MSc student: Life histories of zooplankton after the introduction of lake trout into Yellowstone Lake.

Past Graduate Students

  • Brenna Hansen - MSc 2013: behavioral and physiological mechanisms for coping with phosphorus limitation in invasive snails.
  • Charlotte Narr - MSc 2011: freshwater gastropod survey of Wyoming; effects of the stoichiometry of host food on parasite virulence and transmission.
  • Heather Thon - MSc 2011: interactions between the invasive -- New Zealand mud snail and the native snail Fossaria

Courses

Publications

  • Narr, C.F., Krist, A.C.. in press . Host diet alters trematode replication and elemental composition. Freshwater Science.
  • Levri, E.P. Krist, A.C., R. Bilka, M.F. Dybdahl. 2014. Phenotypic plasticity of the introduced New Zealand mud snail, Potamopyrgus antipodarum compared to sympatric native snails. PLOS ONE 9(4): e93985
  • Krist, A.C., A.D. Kay, K. Larkin, M. Neiman. 2014. Response to phosphorus limitation varies among lake populations of the freshwater snail, Potamopyrgus antipodarum. PLOS ONE 9(1): e85845
  • Neiman, M., A.D. Kay, and A.C. Krist. 2013. Sensitivity to phosphorus limitation increases with ploidy level in a New Zealand snail. Evolution 67: 1511-1517.
  • Neiman, M., A.D. Kay, and A.C. Krist. 2013. Can resource costs of polyploidy provide an advantage to sex? Heredity 110: 152-159.
  • Krist, A.C. and Charles, C.C. 2012. The invasive New Zealand mudsnail, Potamopyrgus antipodarum, is an effective grazer of algae and altered the assemblage of diatoms more than native grazers. Hydrobiologia 694: 143-151.
  • Tibbets, T. M., Krist, A. C. , Hall, R.O. Jr., Riley, L. A. 2010. Phosphorus-mediated changes in life history traits of the invasive New Zealand mudsnail Potamopyrgus antipodarum. Oecologia 163:549-559.
  • Krist, A. C. . 2008. Phenotypic correlations reveal evidence for growth costs but not survival costs in a freshwater snail. Evolutionary Ecology Research 10: 1-9.
  • Krist, A. C. and Showsh, S.A. 2007. Experimental evolution of antibiotic resistance in bacteria. American Biology Teacher 69:218-221.
  • Krist, A. C. 2006. Prevalence of parasites does not predict age at first reproduction or reproductive output in the freshwater snail, Helisoma anceps . Evolutionary Ecology Research 8: 753-763.
  • Dybdahl, M.F., and , A. C. Krist . 2004. Genotypic versus condition effects on parasite-driven rare advantage. Journal of Evolutionary Biology 17: 967-973.
  • Krist, A. C ., J. Jokela, J. Wiehn, and C.M. Lively. 2004. Effects of host condition on susceptibility to infection, parasite development rate, and parasite transmission in a snail-trematode interaction. Journal of Evolutionary Biology 17: 33-40.
  • Krist, A. C. 2002. Crayfish induce a defensive shell shape in a freshwater snail. Invertebrate Biology 121:235--242.
  • Krist, A. C. 2001. Variation in fecundity among populations of snails is predicted by prevalence of castrating parasites. Evolutionary Ecology Research 3:191--197.
  • Krist, A. C., C. M. Lively, E. P. Levri, J.Jokela 2000. Spatial variation in susceptibility to infection in a snail-trematode interaction. Parasitology 121:395--401.
  • Krist, A. C. 2000. Effects of the digenean parasite Proterometra macrostoma on host morphology in the freshwater snail Elimia livescens. Journal of Parasitology 86: 262--267
  • Krist, A. C. and C. M. Lively. 1998. Experimental exposure of juvenile snails (Potamopyrgus antipodarum ) to infection by trematode larvae (Microphallus sp.): infectivity, fecundity compensation and growth. Oecologia 116: 575--582.
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