Reprints on this page are available online or in PDF format. They can be read and printed using Adobe Reader.

  • Reed, W. J., J. L. Ison, A. Waananen, F. H. Shaw, S. Wagenius, R. G. Shaw. Genetic variation in reproductive timing in a long-lived herbaceous perennial. American Journal of Botany. EarlyView:
  • Richardson, L. K. and S. Wagenius. 2022. Fire influences reproductive outcomes by modifying flowering phenology and mate-availability. New Phytologist 233(5): 2083-2093. online version
  • Nordstrom, S. W., A. B. Dykstra, and S. Wagenius. 2021. Fires slow population declines of a long-lived prairie plant through multiple vital rates. Oecologia 196: 679–691. online version | supplemental info | reproducible analysis
  • Richardson, L.K, M.K. Gallagher, T. E. Hayes, A.S. Gallinat, G. Kiefer, K. Manion, M. Jenkins, G. Diersen, and S. Wagenius. 2020. Competition for pollination and isolation from mates differentially impact four stages of pollination in a model grassland perennial. Journal of Ecology 109: 13561369. online version |supplemental info | reproducible analysis
  • Wagenius, S., J. Beck, and G. Kiefer. 2020. Fire synchronizes flowering and boosts reproduction in a widespread but declining prairie species. Proceedings of the National Academy of Sciences 117:3000-3005. online version | more info
  • Page, M. L., Ison, J. L., Bewley, A. L., Holsinger, K. M., Kaul, A. D., Koch, K. E., Kolis, K. M., and Wagenius, S. 2019. Pollinator effectiveness in a composite: A specialist bee pollinates more florets but does not move pollen farther than other visitors. American Journal of Botany 106: 1487–1498. PDF
  • Waananen, A., G. Kiefer, J. L. Ison, and S. Wagenius. 2018. Mating opportunity increases with synchrony of flowering among years more than synchrony within years in a nonmasting perennial. The American Naturalist 192: 379-388. PDF | Appendix | online version
  • Ison, J. L., L. J. Prescott, S. W. Nordstrom, A. Waananen, and S. Wagenius. 2018. Pollinator-mediated mechanisms for increased reproductive success in early flowering plants. Oikos 127: 1657-1669. PDF | Supplement | online version
  • Gallagher, M. K. and S. Wagenius. 2016. Seed source impacts germination and early establishment of dominant grasses in prairie restorations. Journal of Applied Ecology 53: 251-263. PDF | online version.
  • Muller, K. and S. Wagenius. 2016. Echinacea angustifolia and its specialist ant-tended aphid: a multi-year study of manipulated and naturally-occurring aphid infestation. Ecological Entomology 41: 51-60. PDF | online version
  • Shaw, R. G., S. Wagenius and C. J. Geyer. 2015. The susceptibility of Echinacea angustifolia to a specialist aphid: eco-evolutionary perspective on genotypic variation and demographic consequences. Journal of Ecology 103: 809-818. PDF
  • Kittelson, P., S. Wagenius, R. Nielsen, S. Qazi, M. Howe, G. Kiefer, and R. G. Shaw. 2015. Leaf functional traits, herbivory, and genetic diversity in Echinacea: Implications for fragmented populations. Ecology 96: 1877–1886. PDF
  • Herman, B., S. Packard, C. Pollack, G. Houseal, S. Sinn, J. Fant, A. D. Lewis, S. Wagenius, D. Gustafson, K. Hufford, B. Allison, K. Shaw, S. Haines, and C. Daniels. 2014. Decisions . . . Decisions . . . How to Source Plant Material for Native Plant Restoration Projects. Ecological Restoration 32: 236-238. PDF
  • Ison, J.L., and S. Wagenius. 2014. Both flowering time and spatial isolation affect reproduction in Echinacea angustifolia. Journal of Ecology 102: 920–929. PDF | Supplemental Material | Archived Data
  • Switzer, C. 2014. Using place-based inquiry to inspire and motivate future scientists. Science Scope 37: 50-58. PDF
  • Ison, J.L., S. Wagenius, D. Reitz., M.V. Ashley. 2014. Mating between Echinacea angustifolia (Asteraceae) individuals increases with their flowering synchrony and spatial proximity. American Journal of Botany 101: 180-189. PDF
  • Ison, J.L., S. Wagenius, D. Reitz., M.V. Ashley. 2013. Development and evaluation of microsatellite markers for a native prairie perennial, Echinacea angustifolia (Asteraceae). Applications in Plant Sciences 1: 1300049. PDF
  • Wagenius, S., A. B. Dykstra, C. E. Ridley, and R. G. Shaw. 2012. Seedling recruitment in the long-lived perennial, Echinacea angustifolia: a 10-year experiment. Restoration Ecology 20: 352-359. PDF
  • Ridley CE, Hangelbroek HH, Wagenius S, Stanton-Geddes J, Shaw RG, 2011. The effect of plant inbreeding and stoichiometry on interactions with herbivores in nature: Echinacea angustifolia and its specialist aphid. PLoS ONE 6(9): e24762.
  • Diersen, G. T. 2011. Team Echinacea & construction of a key using online images of fresh prairie plant pollen. The American Biology Teacher 73:35-38. PDF
  • Wagenius, S., and S. P. Lyon. 2010. Reproduction of Echinacea angustifolia in fragmented prairie is pollen-limited but not pollinator-limited. Ecology 91:733-742. Abstract | PDF | Supplemental Material
  • Wagenius, S., H. H. Hangelbroek, C. E. Ridley, and R. G. Shaw. 2010. Biparental inbreeding and interremnant mating in a perennial prairie plant: fitness consequences for progeny in their first eight years. Evolution 64: 761-771. Abstract | PDF
  • Ruth G. Shaw, Charles J. Geyer, Stuart Wagenius, Helen H. Hangelbroek, and Julie R. Etterson. 2008. Unifying life-history analyses for inference of fitness and population growth. American Naturalist 172: E35 – E47. Abstract | PDF | Supplemental Material
  • Geyer, C.J., S. Wagenius, and R.G. Shaw. 2007. Aster models for life history analysis. Biometrika 94: 415-426. PDF | Supplemental Material
  • Wagenius, S., E. Lonsdorf, and C. Neuhauser. 2007. Patch aging and the S-Allee effect: breeding system effects on the demographic response of plants to habitat fragmentation. American Naturalist 169: 383-397. PDF | Supplemental Material
  • Wagenius, S. 2006. Scale dependence of reproductive failure in fragmented Echinacea populations. Ecology 87: 931-941. PDF | Supplemental Material
  • Wagenius, S. 2004. Style persistence, pollen limitation, and seed set in the common prairie plant Echinacea angustifolia (Asteraceae). International Journal of Plant Sciences 165: 595-603. PDF
  • Neuhauser, C., D. A. Andow, G. E. Heimpel, G. May, R. G. Shaw, and S. Wagenius. 2003. Community genetics: expanding the synthesis of ecology and genetics. Ecology 84: 545-558. PDF


  • K.E. Muller, G. Hallaman, S. Zufan, J. Gall, and S. Wagenius. Structure, composition, and biotic interactions of ant communities in a fragmented prairie landscape. In revision.
  • Lea Richardson, Jared Beck, Daniel J. Eck, Ruth G. Shaw, Stuart Wagenius. Fire effects on plant reproductive fitness vary among individuals reflecting pollination-dependent mechanisms. In review.
  • Avery E. Pearson, Zeke Zelman, Lauryn A. Hill, Mia A. Stevens, Evan X. Jackson, Miyauna M. N. Incarnato, Ren M. Johnson, Stuart Wagenius, and Jennifer L. Ison. Bee taxa differ in their facilitation of the male fitness in a self-incompatible composite. In review.
  • Beck, J., M. McKone, and S. Wagenius. Masting, fire-stimulated flowering, and the evolutionary ecology of synchronized reproduction. In review.

Techniques and Protocols

Our favorite statistical analysis: aster. The package is available for use with R.

Our standard Echinacea germination_protocol.