Research

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Thor's research interests range from plants to primates to endangered species, as well as the complex relationships between armed conflict and biodiversity conservation. He has studied wild bees, duetting songbirds, habitat fragmentation, rare plant communities, nest predation, and the reproductive ecology and genetic diversity of rainforest trees.  His work on warfare ecology has been covered by news outlets around the world, including Reuters, Scientific American, The New York Times, The Huffington Post, Deutsche Welle, and The Times of India.

Hanson, T. 2022. Predation of Pacific tree frog (Pseudacris regilla) by an American robin (Turdus migratorius) on San Juan Island, Washington. Northwestern Naturalist 103: 190-193.

Hanson, T., S. F. Pearson, P. Hodum, and D. W. Stinson. 2019. Washington State Recovery Plan and Periodic Status Review for the Tufted Puffin. Washington Department of Fish and Wildlife, Olympia, WA. 53+vi pp.

Hanson, T. 2019. Bombs Away: Militarization, Conservation, and Ecological Restoration (book review). Quarterly Review of Biology 94: 110.

Hanson, T. 2018. Biodiversity conservation and armed conflict: a warfare ecology perspective. Annals of the New York Academy of Sciences 1429: 50-65. 

Hanson, T., and J. S. Ascher. 2018. An unusually large nesting aggregation of the digger bee Anthophora bomboides Kirby, 1838 (Hymenoptera: Apidae) in the San Juan Islands, Washington State. Pan-Pacific Entomologist 94: 4-16.

Hudson, L. N., T. Newbold, S. Contu, et al. 2017. The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project. Ecology and Evolution 7: 145-188.

Hanson, T., G. J. Wiles, and J. K. Gaydos. 2016. A novel public-private partnership model for improving the listing of endangered species. Biodiversity and Conservation 25: 193-198.

Hanson, T. and G. J. Wiles. 2015. Washington State Status Report for the Tufted Puffin. Washington Department of Fish and Wildlife, Olympia, WA. 66 pp.

Hanson, T., and G. Machlis. 2014. The broad view of warfare ecology: response to Marler. Environmental Conservation 41: 241.

Hudson, L. N., T. Newbold, S. Contu, et al. 2014. The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impacts. Ecology and Evolution 4: 4701-4735.

Pfeifer, M., V. Lefebvre, L. Baeten, et al. 2014. BIOFRAG – a new database for analyzing biodiversity response to forest fragmentation. Ecology and Evolution 4: 1524-1537.

Potter, A., T. Hanson, and S. Vernon. 2011. Surveys for the Island Marble Butterfly (Euchloe ausonides insulanus) in San Juan County, Washington, 2010. Washington Department of Fish and Wildlife, Olympia, WA, 23 pp.

Hanson, T. 2011. Macrolichens of the Pacific Northwest (book review). Western North American Naturalist 71: 570-571.

Hanson, T., A. Potter, and S. Vernon. 2010. Surveys for the Island Marble Butterfly (Euchloe ausonides insulanus) in San Juan County, Washington, 2009. Washington Department of Fish and Wildlife, Olympia, WA, 32 pp.

Machlis, G.E. and T. Hanson. 2009. Sobre la ecologia de los conflictos armados. Papeles105: 11-23.

Hanson, T., Brooks, T.M., da Fonseca, G.A.B., Hoffman, M., Lamoreaux, J.F., Machlis, G., Mittermeier, C.G., Mittermeier, R.A., Pilgrim, J.D. 2009. Warfare in biodiversity hotspots. Conservation Biology: 23: 578-587.

Donovan, S., Looney, C., Hanson, T., Sanchez-deLeon, Y., Wulfhorst, J. D., Eigenbrode, S., Jennings, M., Johnson-Maynard, J. and Bosque-Perez, N. 2009. Linking social and biophysical conservation perspectives in an endangered ecosystem: the Palouse as a model for bioregional planning. Ecology and Society: 14: 9. (URL: www.ecologyandsociety.org/vol14/iss1/art9/).

Hanson, T., A. Potter, J. Miskelly, and S. Vernon. 2009. Surveys for the Island Marble (Euchloe ausonides insulanus) in San Juan County, Washington, 2008. Washington Department of Fish and Wildlife, Olympia, WA, 30 pp.

Machlis, G., and T. Hanson. 2008. Warfare ecology. Bioscience 58: 729-736.

Hanson, T., Sanchez-deLeon, Y., Johnson-Maynard, J., and Brunsfeld, S. 2008. The influence of soil and site characteristics on Palouse prairie plant communities. Western North American Naturalist 68: 231-240.

Hanson, T.R., Brunsfeld, S.J, Finegan, B. and L.P. Waits. 2008. Pollen dispersal and genetic structure of the tropical tree Dipteryx panamensis in a fragmented landscape. Molecular Ecology 17: 2060-2073.

Hanson, T. 2008. First observation of duetting in the Olive-backed Euphonia (Euphonia gouldi). Wilson Journal of Ornithology 120: 200-201.

Hanson, T.R., Brunsfeld, S.J, Finegan, B. and L.P. Waits. 2008. Characterization of microsatellite primers for the almendro (Dipteryx panamensis), a tetraploid rainforest tree. Molecular Ecology Resources 8: 425-427.

Hanson, T. 2007. Consumption of Carapa guianensis bark by Cebus capucinus in La Reserva Biologica Indio-Maiz, Nicaragua. Neotropical Primates 14: 85-87.

Hanson, T., Brunsfeld, S., Finegan, B. and L. Waits. 2007. Conventional and genetic measures of seed dispersal for Dipteryx panamensis (Fabaceae) in continuous and fragmented Costa Rican rainforest. Journal of Tropical Ecology 23: 635-642.

Hanson, T., Newmark, W. and W. Stanley. 2007. Forest fragmentation and predation on artificial nests in the Usambara Mountains, Tanzania. African Journal of Ecology45: 499-507.

Hanson, T. 2006. Effects of habitat fragmentation on the reproductive ecology and conservation genetics of the almendro (Dipteryx panamensis), a keystone rainforest tree. Ph.D. Dissertation, University of Idaho, Moscow, Idaho.

Hanson, T., Brunsfeld, S., and B. Finegan. 2006. Variation in seedling density and seed predation indicators for the emergent tree Dipteryx panamensis in continuous and fragmented rainforest. Biotropica 38: 770-774.

Hanson, T. 2006. To predate or depredate: what’s the word? Bulletin of the Ecological Society of America 87: 128-131.

Hanson, T. 2006. First observations of incubation behavior for the Stripe-breasted wren (Thryothorous thoracius). Ornitologia Neotropical17: 453-456.

Hanson, T. 2000. Effects of Forest Disturbance and Fragmentation on Nest Predation in the Usambara Mountains, Tanzania. M.S. Thesis, University of Vermont, Burlington, Vermont.