Tiffany Knight

Washington University in St. Louis
Department of Biology
One Brookings Drive, Box 1229
St. Louis, MO 63130
Email: tknight@wustl.edu
phone: (314)935-8282
Fax: (314) 935-4432

Current Position (2005-present)


Assistant Professor, Washington University in St. Louis, Department of Biology
Assistant Director, Environmental Studies Program, Washington University in St. Louis
Research Associate, Missouri Botanical Garden and Chicago Botanic Garden.

Professional Preparation


National Center for Ecological Analysis and Sythesis Postdoctoral Research Associate, 2004-2005
University of FloridaPostdoctoral Research Associate, 2003-2004
University of PittsburghPhD in Ecology and Evolutionary Biology,2003
Florida State UniversityBS in Biology, 1997

Peer Reviewed Publications


2006 Knight, T.M., J.A. Steets, and T.-L. Ashman. 2006. A quantitative synthesis of pollen supplementation experiments highlights the contribution of resource reallocation to estimates of pollen limitation. American Journal of Botany 92: 270-276.

Vamosi, J.C., T.M. Knight, J.A. Steets, S.J. Mazer, M. Burd, and T.-L. Ashman. Pollination decay in biodiversity hotspots. Proceedings of the National Academy of Sciences 103: 956-961.

Vellend, M., T.M. Knight, J.M. Drake. 2006. Antagonistic effects of seed dispersal and herbivory on plant migration. Ecology Letters in press.

Chase, J.M. and T.M. Knight. 2006. Effects of eutrophication and snails on Eurasian Watermilfoil (Myriophyllum spicatum) invasion. Biological Invasions in press.

Boyce, M.S., C.V. Haridas, C. Lee, C.L. Boggs, E.M. Bruna, T. Coulson, D. Doak, J.M. Drake, J.-M. Gaillard, C.C. Horvitz, S. Kalisz, B.E. Kendall, T.M. Knight, E.S. Menges, W.F. Morris, C.A. Pfister, S.D. Tuljapurkar. 2006. Demography in an increasingly variable world. Trends in Ecology and Evolution in press.

2005 Knight, T.M., M.W. McCoy, J.M. Chase, K.A. McCoy and R.D. Holt. 2005. Trophic cascades across ecosystems. Nature 437: 880-883.

Knight, T.M., J.A. Steets, J.C. Vamosi, S.J. Mazer, M. Burd, D.R. Campbell, M.R. Dudash, M. Johnston, R.J. Mitchell, T.-L. Ashman. 2005. Pollen limitation of plant reproduction: Ecological and Evolutionary Causes and Consequences. Annual Review of Ecology, Evolution and Systematics 36: 467-497.

Knight, T.M. and R.D. Holt. 2005. Fire generates spatial gradients in herbivory: An example from a Florida sandhill ecosystem. Ecology 86: 587-593.

Morgan, M.T., Wilson, W.G. and T.M. Knight. 2005. Pollination and the persistence of plant populations: roles for pollinator preference and reproductive assurance. American Naturalist 166: 169-183.

2004 Knight, T.M. 2004. The effects of herbivory and pollen limitation on a declining population of Trillium grandiflorum. Ecological Applications 14: 915-928.

Knight, T.M. and T.E. Miller. 2004. Local adaptation within a population of Hydrocotyle bonariensis. Evolutionary Ecology Research 6: 103-114.

Knight, T.M., J.M. Chase, C.W. Goss and J.J. Knight. 2004. The role of interspecific competition, predation and their interaction on density and development time of larval Anopheles quadrimaculatus. Journal of Vector Ecology 29: 277-284.

Ashman, T.-L., T.M. Knight, J.A. Steets, P. Amarasekare, M. Burd, D.R. Campbell, M.R. Dudash, S.J. Mazer, M. Johnston, R.J. Mitchell, M.T. Morgan, and W.G. Wilson. 2004. Pollen limitation of plant reproduction: Ecological and Evolutionary Causes and Consequences. Ecology 85: 2408-2421.

Holt, R.D., T.M. Knight and M. Barfield. 2004. Allee effects, immigration and the evolution of species' niches. American Naturalist 163: 153-262.

2003 Knight, T.M. 2003. Floral density, pollen limitation and reproductive success in Trillium grandiflorum. Oecologia 137: 557-563.

Knight, T.M. 2003. Effects of herbivory and its timing across populations of Trillium grandiflorum (Liliaceae). American Journal of Botany 90: 1207-1214.

Chase, J.M. and T.M. Knight. 2003. Drought-induced mosquito outbreaks in wetlands. Ecology Letters 6: 1017-1024.

Chase, J.M. and T.M. Knight. 2003. Community genetics: Towards a synthesis. Ecology 84(3): 580-582.

Administration Experience


2005Assistant Director, Environmental Studies Program.
2001 Resident manager. Pymatuning Laboratory of Ecology.

Funding


2005 USDA- Population dynamics of density dependent garlic mustard populations, co-PIs J. Drake, J. Chase, K. McCue. $190,069.
2002 NCEAS working group, Linking pollen limitation to plant population biology, co-PIs T-L Ashman, S. Mazer, M. Morgan. ~1000,000.
2001 National Science Foundation (DDIG) co-PI with S. Kalisz. $7200

University of Pittsburgh, Provost Development Fund. $12000.

Botany in Action. Phipps Conservatory and Botanical Gardens. $3900

1998-2000 McKinley and Darbaker Research Grants. $6800

Academic Awards


2001 First prize in poster competition- U. of Pittsburgh Science 2001 ($500)
2000 Full travel and tuition scholarship- Mathematics of Biological
Complexity- 3 short courses at the University of Tennessee, Knoxville
1997 Recruiting fellowship- University of Pittsburgh
Presentations


Invited seminars
2006University of California, Berkeley, CA
2006University of Illinois, Champagne-Urbana, IL
2005University of South Florida, Tampa, FL
2005Point Reyes National Seashore, CA
2004University of California, Irvine, CA
2004Saint Louis University, St. Louis, MO
2004Washington University in St. Louis, St. Louis, MO
2004University of Florida, Gainesville, FL
2004National Center for Ecological Analysis and Synthesis, Santa Barbara, CA
2003University of Missouri, Columbia, MO
2003Washington University in St. Louis, St. Louis, MO
2003Southern Illinois University, Edwardsville, IL
2003University of Missouri, St. Louis, MO
2003Florida State University, Tallahassee, FL
2002University of Florida, Gainesville, FL
Scientific meetings
2005 Ecological Society of America (MontrC)al)- Trophic cascades across ecosystems: Fish facilitate plant reproduction.
2004 Ecological Society of America (Portland, OR)- Fire as a generator of spatial gradients in plant-herbivore interactions.
2003 7th International Conference on the Ecology and Management of Alien Plant Invasions (Fort Lauderdale, FL)- Overabundance of white-tailed deer facilitates the proliferation of garlic mustard, an exotic weed.
2003 Ecological Society of America (Savannah, GA)- Can evolution by natural selection save a declining Trillium grandiflorum population?
2002 American Naturalist (Banff, Canada)- Can evolution by natural selection save declining wildflower populations?
2002 Midwest Ecology and Evolution Conference (Bowling Green, OH) Using life-table response experiments to quantify the effects of herbivores and pollinators on Trillium grandiflorum.
2001 Ecological Society of America (Madison, WI)- Using life-table response experiments to quantify the effects of herbivores and pollinators on Trillium grandiflorum.
2001 Midwest Ecology and Evolution Conference (Oxford, OH)- The effects of pollen limitation on the fitness of Trillium grandiflorum.
2000 Natural Areas Conference (St. Louis, MO) Overabundance of white-tailed deer facilitates the proliferation of garlic mustard, an exotic weed.
2000 Ecological Society of America (Snowbird, UT)- Population and Community-level responses of herbaceous understory plants to deer exclosure.
2000 Midwest Ecology and Evolution Conference (Athens, OH)- Population and Community-level responses of herbaceous understory plants to deer exclosure
1997 Florida Ecological and Evolutionary Symposium (Archbold, FL)- Local adaptation within a population of Hydrocotyle bonariensis
Public talks
2005 Missouri Native Plant Society (St. Louis, MO)- The effects of white-tailed deer on the abundance of Trillium.
2002 Phipps Conservatory and Botanical Gardens (Pittsburgh, PA)- The effects of white-tailed deer and bumblebees on native wildflowers.
2002 Powdermill Nature Preserve (Ligonier, PA)- The effects of white-tailed deer and bumblebees on a native wildflower.
2002 Fern Hollow Nature Center (Sewickly, PA)- Overabundance of white-tailed deer facilitates the proliferation of garlic mustard, an exotic weed.
2000 Fox Chapel Borough (Pittsburgh, PA)- Population and Community-level responses of herbaceous understory plants to deer exclosure.
Academic and Professional Activities


Graduate Students Advised
Kyra Burraston -current PhD student- Population dynamics of rare, common and invasive thistles.
Nicole Miller -current PhD student - Global climate change and plant-pollinator interactions
Nick Griffin -current PhD student (co-advised with Alan Templeton)- Effects of inbreeding on the competitive ability of Mimulus.
Wayne Law -current PhD student (co-advised with Jan Salick)- Population dynamics of rare snow lotus species in Tibet.
Graduate Student Committees
Brian Allen current - Washington University
Taina Matheson-Price current - Washington University
Brad Oberle current - Washington University
Wade Ryberg current- Washington University
Guoqin Yu current- Washington University
Michelle Schutzenhofer current- Saint Louis University
Andrea Loayza current- University of Missouri, St. Louis.
Luke Harmon PhD in 2005 from Washington University
Undergraduate students advised
Alona Banai current- Pollination biology of rare and common Linanthus species.
Emily Dangremond current- Role of seed predation on the conservation and restoration of the endangered plant, Lupinus tidestromii.
Carla Fresquez - current- The invasive plant, Alliaria petiolata (Garlic Mustard), decreases fitness of native plants through reduction in mycorrhizal fungi symbiont colonization.
Alexandra Harmon-Threatt current- Pollination ecology of native and non-native plant species.
Kristin Powell current- Pollination ecology of endangered, common and invasive plants within the genus Cirsium.
Luz Silverio current- Ecological factors that determine the distribution of Lespedeza species.
Britta Teller current- Role of density dependence and plant tolerance on the management of the invasive plant, Alliaria petiolata
Undergraduate honors thesis reader
Jason Ladner BS in Biology from Washington University in 2005
Crystal Yates-White BS in Biology from Washington University in 2005
Outreach
Kids Do Ecology- conducted an ecology experiment with 5th graders at Franklin School, Goleta, California. This project was designed to introduce minorities to the importance of field ecology.
Workshops on Population Viability Analysis- every year I teach a 1-day long workshop to ~30 attendees to teach population modeling techniques to conservation practitioners. Attendees usually included practitioners from the National Parks Service, US Fish and Wildlife, the Nature Conservancy, the Center for Plant Conservation, and botanical gardens from around the US.
Reviewer for Journals/Books
I review approximately 2 papers per month, and have served as a reviewer at least once for the following journals and book publishers: American Naturalist, American Midland Naturalist, Annals of Botany, Biological Conservation, Ecological Applications, Ecology, Ecology Letters, Evolution, Functional Ecology, International Journal of Plant Sciences, Journal of Ecology, Journal of the Torrey Botanical Society, Madrono, Natural Areas Journal, Oecologia, Plant Species Biology, University of Chicago Press.
Department Committees
Ecology faculty search committee- Fall 2005
Qualifying exam revision committee- Fall 2005
Graduate student steering committee- 2005-present
University Committees
Civil engineering faculty search committee- Spring 2006
Other Service
Vice-Chair, plant population section of the Ecological Society of America-2006
Scientific Advisory Board member for The Center for Plant Conservation- 2006
Scientific Advisory Board member for the Missouri Prairie Foundation- 2006

Society Memberships



American Society of Naturalists
Botanical Society of America
Ecological Society of America

References



Tia-Lynn Ashman, University of Pittsburgh (tia1@pitt.edu)
Robert Holt, University of Florida (rdholt@zoo.ufl.edu)
Susan Kalisz, University of Pittsburgh (kalisz@pitt.edu)