College of Agricultural Sciences Personnel Profile
Personnel Photo of Ruth A Hufbauer
Ruth A Hufbauer
Bioagricultural Sciences and Pest Management
College of Agricultural Sciences

Plant Sciences Building, Room
  • Ph D, Cornell University; Entomology
  • BA, University of California, Berkeley; Development Studies
Personal Website:

I'm an applied evolutionary ecologists with interests in plant-insect interactions, biological control, biological invasions, range expansion, and conservation.

Endriss, Stacy Biddlecomb, Vahsen, Megan, Bitume, Ellyn V, Monroe, Grey Grey, Turner, Kathryn G., Norton, Andrew P, Hufbauer, Ruth A, (2019) The importance of growing up: juvenile environment influences dispersal of individuals and their neighbours ECOLOGY LETTERS 22 1 45-55

Hopper, Julie V., McCue, Kent F., Pratt, Paul D., Duchesne, Pierre, Grosholz, Edwin D., Hufbauer, Ruth A, (2019) Into the weeds: Matching importation history to genetic consequences and pathways in two widely used biological control agents Evolutionary Applications 0 0

Hufbauer, Ruth A, (2018) " Biological invasions and the homogenization of life on Earth" Current Biology 28 R808-R810

Szucs, Marianna, Salerno, Patricia, Teller, Brittany, Schaffner, Urs, Littlefield, Jeffrey, Hufbauer, Ruth A, (2018) The effects of agent hybridization on the efficacy of biological control of tansy ragwort at high elevations Evolutionary Applications

Vahsen, Megan, Shea, Katriona, Hovis, Ciara L., Teller, Brittany J., Hufbauer, Ruth A, (2018) Prior adaptation, diversity, and introduction frequency mediate the positive relationship between propagule pressure and the initial success of founding populations BIOLOGICAL INVASIONS 20 9 2451-2459

Koontz, Michael J., Oldfather, Meagan F., Melbourne, Brett A., Hufbauer, Ruth A, (2018) Parsing propagule pressure: Number, not size, of introductions drives colonization success in a novel environment ECOLOGY AND EVOLUTION 8 16 8043-8054

Endriss, Stacy Biddlecomb, Alba, Christina, Norton, Andrew P, Pysek, Petr, Hufbauer, Ruth A, (2018) Breakdown of a geographic cline explains high performance of introduced populations of a weedy invader JOURNAL OF ECOLOGY 106 2 699-713

Fraimout, Antoine, Debat, Vincent, Fellous, Simon, Hufbauer, Ruth A, Foucaud, Julien, Pudlo, Pierre, Marin, Jean-Michel, Price, Donald K., Cattel, Julien, Chen, Xiao, Depra, Marindia, Duyck, Pierre Francois, Guedot, Christelle, Kenis, Marc, Kimura, Masahito T., Loeb, Gregory, Loiseau, Anne, Martinez-Sanudo, Isabel, Pascual, Marta, Richmond, Maxi Polihronakis, Shearer, Peter, Singh, Nadia, Tamura, Koichiro, Xuereb, Anne, Zhang, Jinping, Estoup, Arnaud, (2017) Deciphering the Routes of invasion of Drosophila suzukii by Means of ABC Random Forest MOLECULAR BIOLOGY AND EVOLUTION 34 4 980-996

Szuecs, Marianna, Melbourne, Brett A., Tuff, Ty Allen, Weiss-Lehman, Christopher, Hufbauer, Ruth A, (2017) Genetic and demographic founder effects have long-term fitness consequences for colonising populations ECOLOGY LETTERS 20 4 436-444

Rogalski, M A, Gowler, C D, Shaw, C L, Hufbauer, Ruth A, Duffy, M A, (2017) Human drivers of ecological and evolutionary dynamics in emerging and disappearing infectious disease systems. Philosophical transactions of the Royal Society of London. Series B, Biological sciences 372 1712

Bitume, Ellyn V, Bean, Daniel, Amanda, Stahlke, Hufbauer, Ruth A, (2017) Hybridization affects life-history traits and host specificity in Diorhabda spp. Biological Control

Facon, Benoit, Estoup, Arnaud, Hufbauer, Ruth A, Foucaud, Julien, Tayeh, Ashraf, (2017) Mating Status Influences Cold Tolerance and Subsequent Reproduction in the Invasive Ladybird Harmonia axyridis Frontiers in Ecology and Evolution 5 108

Fettig, Christa E., Hufbauer, Ruth A, (2017) Reproductive strategy, performance, and population dynamics of the introduced weed Black Henbane (Hyoscyamus niger) WEED SCIENCE 65 1 83-96

Stewart, Gavin S, Morris, Madeline R, Genis, Allison B, Szucs, Marianna, Melbourne, Brett A, Tavener, Simon J, Hufbauer, Ruth A, (2017) The power of evolutionary rescue is constrained by genetic load Evolutionary Applications 10 731--741

Lucy, F.E., Roy, H., Simpson, A., Carlton, J.T, Hanson, J. M., Magellan, K., Campbell, M. L., Costello, M. J., Pagad, S., Hewitt, C. L., McDonald, J., Cassey, P., Thomaz, S. M., Katsanevakis, S., Zenetos, A., Tricarico, E., Boggero, A., Groom, Q. J., Adriaens, T., Vanderhoeven, S., Torchin, M. E., Hufbauer, Ruth A, Fuller, P., Carman, M. R., Conn, D. B., Vitule, J. R. S., Canning-Clode, J., Galil, B. S., Ojaveer, H., Bailey, S. A., Therriault, T. W., Claudi, R., Gazda, A., Dick, J. T. A., Caffrey, J., Witt, A., Kenis, M., Lehtiniemi, M., Helmisaari, H., Panov, V. E., (2016) INVASIVESNET towards an International Association for Open Knowledge on Invasive Alien Species Management of Biological Invasions 7 2 131–139

Estoup, Arnaud, Ravigné, Virginie, Hufbauer, Ruth A, Vitalis, Renaud, Gautier, Mathieu, Facon, Benoit, (2016) Is There a Genetic Paradox of Biological Invasion? Annual Review of Ecology, Evolution, and Systematics 47 1 51–72

Tayeh, A., Hufbauer, Ruth A, Estoup, A., Ravigne, V., Frachon, L., Facon, B., (2015) Biological invasion and biological control select for different life histories Nature Communications 6

Migeon, A., Auger, P., Hufbauer, Ruth A, Navajas, M., (2015) Genetic traits leading to invasion: plasticity in cold hardiness explains current distribution of an invasive agricultural pest, Tetranychus evansi (Acari: Tetranychidae) Biological Invasions 17 8 2275-2285

Barney, J. N., Tekiela, D. R., Barrios-Garcia, M. N., Dimarco, R. D., Hufbauer, Ruth A, Leipzig-Scott, Peter Colin, Nunez, M. A., Pauchard, A., Pysek, P., Vitkova, M., Maxwell, B. D., (2015) Global Invader Impact Network (GIIN): toward standardized evaluation of the ecological impacts of invasive plants Ecology and Evolution 5 14 2878-2889

Drew, J. A., Amatangelo, K. L., Hufbauer, Ruth A, (2015) Quantifying the Human Impacts on Papua New Guinea Reef Fish Communities across Space and Time Plos One 10 10

Hufbauer, Ruth A, Szucs, Marianna, Kasyon, E., Youngberg, C., Koontz, M. J., Richards, C., Tuff, T., Melbourne, B. A., (2015) Reply to Wootton and Pfister: The search for general context should include synthesis with laboratory model systems Proceedings of the National Academy of Sciences of the United States of America 112 44 E5904-E5904

Hufbauer, Ruth A, Szucs, Marianna, Kasyon, E., Youngberg, C., Koontz, M. J., Richards, C., Tuff, T., Melbourne, B. A., (2015) Three types of rescue can avert extinction in a changing environment Proceedings of the National Academy of Sciences of the United States of America 112 33 10557-10562

Turner, Kathryn G, Hufbauer, Ruth A, Rieseberg, Loren H, (2014) Rapid evolution of an invasive weed. New Phytologist. New Phytologist

Szűcs, M, Melbourne, B A, Tuff, T, Hufbauer, Ruth A, (2014) The roles of demography and genetics in the early stages of colonization. Proceedings. Biological sciences / The Royal Society 281 1792

Parker, John D, Torchin, Mark E, Hufbauer, Ruth A, Authors, Many Other, (2013) Do invasive species perform better in their new ranges? Ecology 94 985-994

Zelikova, T J, Hufbauer, Ruth A, Reed, S C, Wertin, T, Fettig, C, Belnap, J , (2013) Eco-evolutionary responses of Bromus tectorum to climate change: Implications for biological invasions. Ecology and Evolution 3 1374-1387

Kumschick, Sabrina, Hufbauer, Ruth A, Alba, Christina, Blumenthal, Dana M, (2013) Evolution of fast-growing and more resistant phenotypes in introduced common mullein (Verbascum thapsus) Journal of Ecology 101 378-387

Tayeh, Ashraf, Estoup, Arnaud, Hufbauer, Ruth A, (2013) Investigating the genetic load of an emblematic invasive species: The case of the invasive harlequin ladybird Harmonia axyridis. Ecology and Evolution 3 864-871

Gaskin, John D, Hufbauer, Ruth A, Bogdanowicz, Steven M, (2013) Microsatellite markers for Russian olive (Elaeagnus angustifolia; Elaeagnaceae). Applications in Plant Sciences 1

Hufbauer, Ruth A, Rutschmann, Alex, Serrate, Bruno, Vermeil de Conchard, Hervé, Facon, Benoit, (2013) Role of propagule pressure in colonization success: disentangling the relative importance of demographic, genetic and habitat effects. Journal of Evolutionary Biology 26 1691-1699

Hufbauer, Ruth A, Wilbur, Hannah, Alba, Christina, Norton, Andrew P, (2013) The effect of insect herbivory on the growth and fitness of introduced Verbascum thapsus L NeoBiota 19 21

(2012) A biogeographiccomparison of Verbascum thapsus ecology reveals differences in performance, herbivory, and surrounding plant community Biological Invasions 14 2505-2518

(2012) Anthropogenically-induced adaptation to invade(AIAI: Contemporary adaptation to human-alteredhabitats within the native range can promoteinvasions Evolutionary Applications 5 89-101

(2012) Combiningoptimal defense theory and the evolutionarydilemma model to refine predictions regardingplant invasion Ecology 93 1912-1921

(2012) Evolution and biological control Evolutionary Applications 5 410-423

(2012) Hybridization andinvasion: An experimental test with diffuseknapweed (Centaurea diffusa Lam) EvolutionaryApplications 5 17-28

(2012) Indirect effects ofparasites on invasions Functional Ecology 26 1262-1274

(2012) The biology of small introduced populations,with special reference to biological control Evolutionary Applications 5 424-443

(2012) Timing controlefforts to limit seedset of common mullein (Verbascum thapsus) Invasive Plant Science and Management 5 390-394

(2011) AnExperimental Examination of the Role ofHybridization in the Invasion of Diffuse Knapweed(Centaurea diffusa Lam) Evolutionary Applications DOI:101111/j1752-45712011.00203.x

(2011) Anthropogenically-induced adaptation to invade(AIAI): Contemporary adaptation to human-alteredhabitats within the native range can promoteinvasions Evolutionary Applications DOI:10.1111/j.1752-4571.2011.00211.x

(2011) Applyingmolecular-based approaches to classical biologicalcontrol of weeds Biological Control 58 21-Jan

(2011) Evolution of growth but not structural orchemicaldefense in Verbascum thapsus (common mullein)following introduction to North America Biological Invasions 13 2379-2389

(2011) Inbreeding depression is purged inthe invasive insect Harmonia axyridis CurrentBiology 21 4-Jan

(2011) Openminded and open access: introducing NeoBiota, anew peer-reviewed journal of biological invasions NeoBiota 9 12-Jan

(2011) Thebenefits of pre-release population genetics: Acase study using Ceutorhynchus scrobicolis, acandidate agent of garlic mustard, Alliariapetiolata Biological Control 56 65-75

(2011) Weak or strong invaders? A comparison of impact between the native and invaded ranges of mammals and birds alien to Europe Diversity andDistributions 17 663-672

(2010) Assessing genetic diversity of Canada thistle (Circium arvense) in North America with microsatellites Weed Science 58 387- 394

(2010) Hybridization and invasion: one of North America's most devastating invasive plants shows evidence for a history of hybridization Evolutionary Applications 3 40-51

(2009) PCR-RFLP assays for discerning three weevil stem feeders (Ceutorhynchus spp) (Col. Biocontrol) Sci Techn 19 999-1005

(2009) The importance of analytical techniques in allelopathy studies with the reported allelochemical catechin as an example Biol Invasions 11 325-332

(2008) Biological invasions Curr Biol 18 R246-R247

(2008) Evidence for multiple introductions of Centaurea stoebe micranthos (spotted knapweed, Asteraceae) to North America Mol Ecol 17 4197-4208

(2008) Frequent sexual reproduction and high intraspecific variation in Salix arctica J Geophys Res-Biogeo 113

(2008) How do biological control and hybridization affect enemy escape? Biol Control 46 358-370

(2008) Inference of allelopathy is complicated by effects of activated carbon on plant growth New Phytol 178 412-423

(2008) Multiple introductions of two invasive Centaurea taxa inferred from cpDNA haplotypes Divers Distrib 14 252-261

Hufbauer, Ruth A, Blair, Amy C, Nissen, Scott J, Brunk, Galen R, Westra, Philip, Hanson, Bradley D, (2008) "OOS 24-3: Spotted knapweed and the mystery of the missing weapons of mass destruction"

(2008) When invasion increases population genetic structure Biol Invasions 10 561-572

(2007) Direct and interactive effects of enemies and mutualists on plant performance Ecology 88 1021-1029

(2007) Evaluating host use of an accidentally introduced herbivore on two invasive toadflaxes Biol Control 41 184-189

MacKinnon, Daniel K, Hufbauer, Ruth A, Norton, Andrew P, (2007) Evaluating host use of an accidentally introduced herbivore on two invasive toadflaxes Biological Control 41 2 184–189

(2007) Increased plant size in exotic populations Ecology 88 2758-2765

(2006) A lack of evidence for an ecological role of the putative allelochemical (+/-)-catechin in spotted knapweed invasion success J Chem Ecol 32 2327-2331

(2006) Biotic interactions and plant invasions Ecol Lett 9 726-740

(2006) Nine polymorphic microsatellite markers in Centaurea stoebe L [subspecies C-s stoebe and C-s micranthos (S G Gmelin ex Gugler) Hayek] and C-diffusa Lam (Asteraceae) Mol Ecol Notes 6 897-899

(2005) Host-plant preference of Brachypterolus pulicarius, an inadvertently introduced biological control insect of toadflaxes Entomol Exp Appl 116 183-189

MacKinnon, Daniel K, Hufbauer, Ruth A, Norton, Andrew P, (2005) Host-plant preference of Brachypterolus pulicarius, an inadvertently introduced biological control insect of toadflaxes Entomologia experimentalis et applicata 116 3 183–189

(2005) Microevolution in biological control Biol Control 35 227-239

(2005) New techniques and findings in the study of a candidate allelochemical implicated in invasion success Ecol Lett 8 1039-1047

Blair, Amy C, Hanson, Bradley D, Brunk, Galen R, Marrs, Robin A, Westra, Philip, Nissen, Scott J, Hufbauer, Ruth A, (2005) New techniques and findings in the study of a candidate allelochemical implicated in invasion success Ecology Letters 8 10 1039--1047

(2005) Pre- and post-introduction patterns in neutral genetic diversity in the leafy spurge gall midge, Spurgia capitigena (Bremi) (Diptera) Biol Control 33 153-164

Lloyd, Casandra J, Hufbauer, Ruth A, Jackson, Aaron, Nissen, Scott J, Norton, Andrew P, (2005) Pre-and post-introduction patterns in neutral genetic diversity in the leafy spurge gall midge, Spurgia capitigena (Bremi)(Diptera: Cecidomyiidae) Biological Control 33 2 153–164

(2004) Microsatellite isolation from the gall midge Spurgia capitigena (Diptera) Mol Ecol Notes 4 605-607

Lloyd, Casandra J, Norton, Andrew P, Hufbauer, Ruth A, Bogdanowicz, Steven M, Nissen, Scott J, (2004) Microsatellite isolation from the gall midge Spurgia capitigena (Diptera: Cecidomyiidae), a biological control agent of leafy spurge Molecular Ecology Notes 4 4 605–607

(2004) Observations of sagebrush gall morphology and emergence of Rhopalomyia pomum (Diptera) West N Am Naturalist 64 324-330

(2004) Population genetics of invasions Weed Technol 18 1522-1527

(2004) The population genetics of a biological control introduction Mol Ecol 13 337-348

(2002) Aphid population dynamics Ecol Entomol 27 25-32

(2002) Enantiomeric-dependent phytotoxic and antimicrobial activity of (+/-)-catechin, A rhizosecreted racemic mixture from spotted knapweed Plant Physiol (Retracted article See vol 151, pg 967, 2009) 128 1173-1179

(2002) Evidence for nonadaptive evolution in parasitoid virulence following a biological control introduction Ecol Appl 12 66-78

MacKinnon, Daniel, Hufbauer, Ruth A, Norton, Andrew P, (2002) "Preference of a biological control agent of toadflaxes" The 2002 ESA Annual Meeting and Exhibition

(2001) Isolation and characterization of microsatellites in Aphidius ervi (Hymenoptera) Mol Ecol Notes 1 197-199

Hufbauer, Ruth A, Norton, Andrew P, MacKinnon, Daniel, (2001) "Population structure of an introduced beetle on its host plants, Linaria dalmatica and L. vulgaris" Entomological Society of America Annual Meeting

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