Blaire Van Valkenburgh
office: 310M Botany
EE BIOL 194B - Research Group or Internship Seminars: Ecology and Evolutionary Biology
GE CLST 70B - Evolution of Cosmos and Life
GE CLST 70CW - Evolution of the Cosmos and Life: Special Topics in Life Sciences
As a vertebrate paleobiologist, my focus is the evolution of form, function and ecology in organisms, both living and extinct. I study living species as a key to understanding extinct species and am drawn to the fossil record because of its unique attributes. First, it provides the only record of long-term evolutionary change in form, matched perhaps in magnitude only by the history of genetic change preserved in the genome. Second, it provides a window into life and ecosystems prior to the alterations and biases engendered by anthropogenic forces and recent Pleistocene extinctions. Third, it presents us with species and morphologies that are no longer present, such as dinosaurs and sabertooth cats, and thereby expands our understanding of life?s potentials beyond what we can observe today.
Much of my research has focused on large predatory mammals. Large predators on land and sea are receiving much attention among ecologists because they act as major drivers within their ecosystems and many are threatened with extinction. As top-down regulators, they are pivotal players in trophic cascades that affect both plant and animal distributions and abundance. Modern species evolved within much more diverse and complex guilds of large predators that included species such as short-faced bears, sabertooth cats, and dire wolves. To better understand both the dynamics of extant predator communities and the adaptations of individual species, I have explored the fossil record of carnivores from both ecological and evolutionary perspectives, sometimes focusing on guilds of species in distinct time horizons, and other times focusing on the evolutionary trajectories of species over millions of years. Below I list four recent areas of research that exemplify the work in my lab.
1. Parallels between past and present predator guilds
2. Evolution of feeding adaptations
3. Function and evolution of mammalian turbinates
4. Molecular and morphological evolution within the Carnivora.
Stains, M., Harshman, J., Barker, M. K., Chasteen, S. V., Cole, R., Decheene-Peters, S. E., Eagen, M. K., Esson, J. M., Knight, J. K., Laski, F. A., Levis-Fitzgerald, M., Lee, C. J., Lo, S. M., McDonnell, L. M., McKay, T. A., Michelotti, N., Musgrove, A., Palmer, M. S., Plank, K. M., Rodela, T. M., Sanders, E. R., Schimpf, N. G., Schulte, P. M., Smith, M. K., Stetzer, M., Van Valkenburgh, B., Vinson, E., Weir, L. K., Wendel, P. J., Wheeler, L. B., & Young, A. M., "Anatomy of STEM teaching in North American universities", Science, 359 : 1468-1470 (2018) .
Pang B, Van Valkenburgh B, Kitchell KF, Dickman A, and Marker L, "History of the cheetah-human relationship", In: Cheetahs: Biology and Conservation, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), London Academic Press 359 : 17-24 (2018) .
Van Valkenburgh B, Pang B, Cherrin M, and Rook L, "The cheetah: evolutionary history and paleoecology", Cheetahs: Biology and Conservation, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), London Academic Press 359 : 25-33 (2018) .
Balisi M, Casey C, and Van Valkenburgh B, "Dietary specialization is linked to reduced species durations in North American fossil canids", Royal Society Open Science, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 5 : 171861- (2018) [link].
Bird DJ, Murphy WJ, Rox-Rosales L, Hamid I, Eagle RA, and Van Valkenburgh B, "Olfaction written in bone: cribriform plate size parallels olfactory receptor gene repertoires in Mammalia", Proceedings of the Royal Society B, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 5 : - (2018) .
Curtis AA, Orke M, Tetradis S, and Van Valkenburgh B, "Diet-related differences in craniodental morphology between captive-reared and wild coyotes, Canis latrans (Carnivora: Canidae)", Biological Journal of the Linnean Society, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 123 : 677-693 (2018) .
Brown C, Balisi M, Shaw CA, and Van Valkenburgh B, "Skeletal trauma reflects hunting behavior in extinct sabre-tooth cats and dire wolves", Nature Ecology and Evolution, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 1 : 0131- (2017) .
Mann SA, Van Valkenburgh B, and Hayward MH, "Tooth fracture within the African carnivore guild: the influence of intraguild competition and resource availability", Journal of Zoology, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 303 : 261-269 (2017) .
Rygg AT, Van Valkenburgh B, and Craven BA, "The influence of sniffing on airflow and odorant deposition in the canine nasal cavity", Chemical Senses, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 42 : 683-698 (2017) .
Ripple, W.J., Chapron, G., Lopez-Bao, J.V., Durant, S.M., Macdonald, D.W., Lindsey, P.A.,Bennett, E.L., Beschta, R.L., Bruskotter, J.T., Campos-Arceiz, A., Corlett, R.T., Darimont, C.T., Dickman, A.J., Dirzo, R., Dublin, H.T., Estes, J.A., Everatt, K.T., Galetti, M., Goswami, V.R., Hayward, M.W., Hedges, S., Hoffmann, M., Hunter, L.T.B., Kerley, G.I.H., Letnic, M., Levi, T., Maisels, F., Morrison, J.C., Nelson, M.P., Newsome, T.M., Painter, L., Pringle, R.M., Sandom, C.J., Terborgh, J., Treves,, "Conserving the world?s megafauna: the fierce urgency of now", BioScience, Marker L, Boast LK, Schmidt-Kuntzel A(Eds.), 67 : 197-200 (2017) .