Hannah J. Broadley

Hannah J. Broadley Headshot

PhD Candidate

B.S., Bates College, 2010

Advisor: Joseph S. Elkinton

Research Interests

I study winter moth (Operophtera brumata), an invasive, defoliating geometrid in eastern Massachusetts. It was introduced to the Boston and Cape Cod area about a decade ago. My research considers different sources of mortality on this non-native insect and the population-level impacts of these mortality factors. My research has three components: (1) Considering late-larval stage mortality of winter moth from predators, parasitism, and disease and comparing these mortality factors to that of the native congener Bruce spanworm (Operophtera bruceata ), (2) Evaluating predation by large invertebrates (e.g. Carabid and Staphylinid beetles) and small mammals (e.g. shrews) on winter moth pupae and the possible interaction of predation and percent parasitism, and (3) Comparing overwintering mortality and cold hardiness of winter moth in comparison to Bruce spanworm.


Pepi, A.A., H.J. Broadley, and J.S. Elkinton. Density-dependent effects of larval dispersal mediated by host plant quality on populations of an invasive insect. Oecologia. In Review.    

Havill, N.P., J.S. Elkinton, J.C. Andersen, S.B. Hagen, H.J. Broadley, G.J. Boettner, A. Caccone.  Asymmetric hybridization between non-native winter moth, Operophtera brumata (Lepidoptera: Geometridae), and native Bruce spanworm, O. bruceata, in the northeastern United States, assessed with novel microsatellites and SNPs. Bulletin of Entomological Research. In Review

Broadley, H.J., N.A. Baer, K.C. Weathers, H.A. Ewing, K.L. Cottingham, R. Chaves-Ulloa, J. Chickering, A.M. Wilson, and C.Y. Chen. The Role of Dissolved Organic Carbon in Determining Methylmercury Bioaccumulation in Stream Food Webs. For submission to Science of the Total Environment. In Prep.

Chaves-Ulloa, R., B.W. Taylor, H.J. Broadley, K.L. Cottingham, N.A. Baer, K.C. Weathers, H.A. Ewing, C.Y. Chen. Dissolved organic carbon modulates mercury concentrations in insect subsidies from 2 streams to terrestrial consumers. Ecological Applications. In Review. 

Buckman, K.L., M. Marvin-DiPasquale, V.F. Taylor, A. Chalmers, H.J. Broadley, J. Agee, B.P. Jackson, C.Y. Chen. 2015. Influence of a chlor-alkali superfund site on mercury bioaccumulation in periphyton and low-trophic level fauna.  Environmental Toxicology. DOI: 10.1002/etc.2964

Broadley, H.J., K.L. Buckman, D.M. Bugge, and C.Y. Chen. 2013. Spatial variability of metal bioaccumulation in estuarine killifish (Fundulus heteroclitus) at the Callahan mine superfund site, Brooksville, ME. Archives of Environmental Contamination and Toxicology 65:765–78. DOI 10.1007/s00244-013-9952-y

Honorable Mention, NSF Graduate Research Fellowship, Spring 2014

Graduate School Dissertation Research Grant. 2015. The role of a native pathogen on the population dynamics of an invasive and on a native caterpillar.

2nd Place, Gerald N. Lanier Student Forum, Northeast Forest Pest Council, Spring 2014 and Spring 2015