Tobin J Hammer

picture of Tobin J Hammer

Assistant Professor, Ecology & Evolutionary Biology
School of Biological Sciences

B.S., University of California San Diego, 2009, General Biology
Ph.D., University of Colorado Boulder, 2018, Ecology & Evolutionary Biology


University of California, Irvine
341 Steinhaus Hall
Mail Code: 2525
Irvine, CA 92697
Research Interests
microbiomes, symbiosis, microbial ecology & evolution, bees, biodiversity, insect-plant interactions, tropical biology
Postdoctoral Researcher, University of Texas at Austin, 2018-2021
Hammer, T.J., Le, E., Martin, A.N., Moran, N.A. 2021. The gut microbiome of bumblebees. Insectes Sociaux 68, 287-301.

Silva Cerqueira, A.E., Hammer, T.J., Moran, N.A., Cristiano Santana, W., Megumi Kasuya, M.C., Canêdo da Silva, C. 2021. Extinction of anciently associated gut bacterial symbionts in a clade of stingless bees. The ISME Journal 15, 2813-2816.

Hammer, T.J., Le, E., Moran, N.A. 2021. Thermal niches of specialized gut symbionts: the case of social bees. Proceedings of the Royal Society B 288, 20201480.

Hammer, T.J., De Clerck-Floate, R., Tooker, J.F., Price, P.W., Miller, D.G., Connor, E.F. 2021. Are bacterial symbionts associated with gall induction in insects? Arthropod-Plant Interactions 15, 1-12.

Hammer, T.J., Dickerson, J.C., McMillan, W.O., Fierer, N. 2020. Heliconius butterflies host characteristic and phylogenetically structured adult-stage microbiomes. Applied and Environmental Microbiology 86, e02007-20.

Danielsson, R., Lucas, J., Dahlberg, J., Ramin, M., Agenäs, S., Bayat, A., Tapio, I., Hammer, T.J., Roslin, T. 2019. Compound- and context-dependent effects of antibiotics on greenhouse gas emissions from livestock. Royal Society Open Science 6, 182049.

Hammer, T.J., Moran, N.A. 2019. Links between metamorphosis and symbiosis in holometabolous insects. Philosophical Transactions of the Royal Society B 374, 20190068.

Moran, N.A., Ochman, H., Hammer, T.J. 2019. Evolutionary and ecological consequences of gut microbial communities. Annual Review of Ecology, Evolution, and Systematics 50, 451-475.

Keiser, C.N., Hammer, T.J., Pruitt, J.N. 2019. Social spider webs harbour largely consistent bacterial communities across broad spatial scales. Biology Letters 15, 20190436.

Hammer, T.J., Sanders, J.N., Fierer, N. 2019. Not all animals need a microbiome. FEMS Microbiology Letters 366, fnz117.

Ravenscraft, A., Berry, M., Hammer, T.J., Peay, K., Boggs, C. 2018. Structure and function of the bacterial and fungal gut microbiota of Neotropical butterflies. Ecological Monographs 89, e01346.

Hammer, T.J., Janzen, D.H., Hallwachs, W., Jaffe, S., Fierer, N. 2017. Caterpillars lack a resident gut microbiome. Proceedings of the National Academy of Sciences 114, 9641-9646.

Hammer, T.J., Fierer, N., Hardwick, B., Simojoki, A., Slade, E., Taponen, J., Viljanen, H., Roslin, T. 2016. Treating cattle with antibiotics affects greenhouse gas emissions, and microbiota in dung and dung beetles. Proceedings of the Royal Society B 283, 20160150.

Barberán, A., Hammer, T.J., Madden, A., Fierer, N. 2016. Microbes should be central to ecological education and outreach. Journal of Microbiology & Biology Education 17, 23-28.

Planet, P.J., Parker, D., Cohen, T.S., Smith, H., Leon, J.D., Ryan, C., Hammer, T.J., Fierer, N., Chen, Emily I., Prince, A.S. 2016. Lambda interferon restructures the nasal microbiome and increases susceptibility to Staphylococcus aureus superinfection. mBio 7, e01939-15.

Hammer, T.J., Dickerson, J.C., Fierer, N. 2015. Evidence-based recommendations on storing and handling specimens for analyses of insect microbiota. PeerJ 3, e1190.

Hammer, T.J., Bowers, M.D. 2015. Gut microbes may facilitate insect herbivory of chemically defended plants. Oecologia 179, 1-14.

Hammer, T.J., Van Bael, S.A. 2015. An endophyte-rich diet increases ant predation on a specialist herbivorous insect. Ecological Entomology 40, 316-321.

Hammer, T.J., McMillan, W.O., Fierer, N. 2014. Metamorphosis of a butterfly-associated bacterial community. PLoS One 9, e86995.

Hammer, T.J., Hata, C., Nieh, J.C. 2009. Thermal learning in the honey bee, Apis mellifera. Journal of Experimental Biology 212, 3928-3934.
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