Associate Professor
University of California, Berkeley, BA
University of Montana, 2008, PhD


I conduct research to understand how the distributions and local abundances of species change as a result of interacting ecological and evolutionary processes. My research advances the fields of ecology and evolution, and answers critical questions about how species will respond to major global environmental changes, including climate change, habitat destruction, and biological invasions. At its core, my research program is working toward a process-based understanding of the conservation and management of threatened and invasive species. My current projects include work on the effects of evolution and landscape structure on how quickly spatial locations of species can move, and how life histories of plants (e.g. size at flowering) evolve under changing climates.


ILER, A. M., COMPAGNONI, A., INOUYE, D. W., WILLIAMS, J. L., CARADONNA, P. J., ANDERSON, A. and MILLER, T. E. X. 2019 ‘Reproductive losses due to climate change‐induced earlier flowering are not the primary threat to plant population viability in a perennial herb’ Journal of Ecology 107(4), 1931-1943

LOUGHNAN, D. E. E. and WILLIAMS, J. L. 2019 ‘Climate and leaf traits, not latitude, explain variation in plant–herbivore interactions across a species’ range’ Journal of Ecology 107(2), 913-922

LUSTENHOUWER, N., WILLIAMS, J. L. and LEVINE, J. M. 2019 ‘Evolution during population spread affects plant performance in stressful environments’ Journal of Ecology 107(1), 396-406



WILLIAMS, J. L. and LEVINE, J. M. 2018 ‘Experimental evidence that density dependence strongly influences plant invasions through fragmented landscapes’ Ecology 99(4), 876-884

GERMAIN, R. M., WILLIAMS, J. L., SCHLUTER, D. and ANGERT, A. L. 2018 ‘Moving Character Displacement beyond Characters Using Contemporary Coexistence Theory’ Trends in Ecology & Evolution 33(2), 74-84

LUSTENHOUWER, N., WILSCHUT, R. A., WILLIAMS, J. L., VAN DER PUTTEN, W. H. and LEVINE, J. M. 2018 ‘Rapid evolution of phenology during range expansion with recent climate change’ Global Change Biology 24(2), e534-e544



TROWBRIDGE, C. C., STANLEY, A., KAYE, T. N., DUNWIDDIE, P. and WILLIAMS, J. L. 2017 ‘Long‐term effects of prairie restoration on plant community structure and native population dynamics’ Restoration Ecology 25(4), 559-568

SARGENT, R., ANGERT, A. L. and WILLIAMS, J. L. 2017 ‘When are species invasions useful for addressing fundamental questions in plant biology? American Journal of Botany 104(6), 797-799  DOI: 10.3732/ajb.1700087



WILLIAMS, J. L., KENDALL, B. E. and LEVINE, J. M. 2016 ‘Rapid evolution accelerates plant population spread in fragmented experimental landscapes’ Science 353(6298), 482-485    DOI: 10.1126/science.aaf6268

WILLIAMS, J. L., SNYDER, R. E. and LEVINE, J. M. 2016 ‘The Influence of Evolution on Population Spread through Patchy Landscapes’ The American Naturalist 188(1), 15-26                 doi: 10.1086/686685



WILLIAMS, J. L., JACQUEMYN, H., OCHOCKI, B., BRYS, R. and MILLER, T. E. X. 2015 ‘Life history evolution under climate change and its influence on the population dynamics of a long‐lived plant’ Journal of Ecology 103(4), 798-808



WILLIAMS, J. L. and FISHMAN, L. 2014 ‘Genetic evidence for founder effects in the introduced range of houndstongue (Cynoglossum officinale)’ Biological Invasions 16(1), 205-216     DOI: 10.1007/s10530-013-0514-z


Winter 2019
No GEOB course(s) were found for W2019 term.Winter 2019
No GEOB course(s) were found for W2019 term.Winter 2019
No GEOB course(s) were found for W2019 term.