I am an evolutionary biologist primarily studying natural populations of arthropods, including butterflies, flies and mosquitoes. I use ecological, evolutionary and genomics approaches to study the interaction between insect-associated microbes and their hosts.
My main research areas include study of (see RESEARCH for more info):
1. Hypolimnas & Wolbachia
I have been studying one particular butterfly species for over 10 years: Hypolimnas bolina, which is infected with a male-killing bacterium called Wolbachia over much of its Asia-Pacific range. This system has provided amazing examples of how dynamic host-symbiont interactions can be.
2. Host x microbiome x environment interactions
I also study other taxa in order to ask if and how bacterial symbionts influence host adaptation to the environment, particularly temperature, and to assess the natural diversity of bacterial symbionts (e.g. the microbiome including heritable endosymbionts) that insects carry.
Two new publications:
Global invasion history of the agricultural pest butterfly Pieris rapae revealed with genomics and citizen science. (Journal article)Ryan, S. F., Lombaert, E., Espeset, A., Vila, R., Talavera, G., Dincă, V., Doellman MM, Renshaw MA Eng MW, Hornett EA, . . . Shoemaker, D. (2019). Global invasion history of the agricultural pest butterfly Pieris rapae revealed with genomics and citizen science.. Proceedings of the National Academy of Sciences of the United States of America. DOI: 10.1073/pnas.1907492116
Unprecedented reorganization of holocentric chromosomes provides insights into the enigma of lepidopteran chromosome evolution (Journal article)Hill, J., Rastas, P., Hornett, E. A., . . . Wheat, C. W. (2019). Unprecedented reorganization of holocentric chromosomes provides insights into the enigma of lepidopteran chromosome evolution. SCIENCE ADVANCES, 5(6). DOI: 10.1126/sciadv.aau3648
January: New position at LSTM!
I am now working as a bioinformatician in the Vector Biology department at the Liverpool School of Tropical Medicine. My main project is to investigate the effect of temperature on mosquito-microbiome interactions.
December 2018: New publication
Sean F Ryan, Eric Lombaert, Anne Espeset, Roger Vila, Gerard Talavera, Vlad Dincă, Mark A Renshaw, Matthew W Eng, Meredith M Doellman, Emily A Hornett, Yiyuan Li, Michael E Pfrender, DeWayne Shoemaker. (2018). Global invasion history of the world's most abundant pest butterfly: a citizen science population genomics study. bioRxiv 506162; doi: https://doi.org/10.1101/506162 pdf
September 2018: Move to the University of Liverpool, UK
I'm currently in the Institute of Integrative Biology at Liverpool, working on one of my favourite butterflies, Hypolimnas bolina
September 2018: New publication
Hegde S, Khanipov K, Albayrak L, Pimenova M, Saldana MA, Rojas MM, Hornett EA, Motl GC, Fredregill CL, Dennett JA, Fofanov Y, Hughes GL. (2018) Microbiome interaction networks and community structure from laboratory-reared and field-collected Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus mosquito vectors. Frontiers in Microbiology 9:2160 abstract
May 2018: New publication
Duplouy A & Hornett EA (2018) Uncovering the hidden players in Lepidoptera biology: the heritable microbial endosymbionts. PeerJ 6:e4629 https://doi.org/10.7717/peerj.4629
March 2018: Preprint out now
Duplouy A & Hornett EA (2018) Uncovering the hidden players in Lepidoptera biology: the heritable microbial endosymbionts. PeerJ Preprints
June 2017: New publication
Neethiraj R*, Hornett EA*, Hill J & Wheat CW. (2017) Investigating the genomic basis of discrete phenotypes using a Pool-Seq only approach: new insights into the genetics underlying color variation in diverse taxa. Molecular Ecology doi:10.1111/mec.14205 (*co-first authors)
August 2016: Nice write-up of the Hypolimnas work in The Atlantic by Ed Yong - The Strange Case of the Butterfly and the Male-Murdering Microbe
August 2016: Back from maternity leave (August 2015 - July 2016)
July 2016: New publication
Hernández-Roldán JL, Dapporto L, Dincă V, Vicente JC, Hornett EA, Šíchová J, Lukhtanov V, Talavera G, Vila R. (2016) Integrative analyses unveil speciation linked to host plant shift in Spialia butterflies Molecular Ecology abstract
April 2015: Move to Cambridge University
I am now located at Cambridge University, UK. It's lovely to be back, especially in the springtime.
February 2015: Newly funded grant
Press release of new NSF-funded grant - in collaboration with Dr. Schilder at PSU (http://news.psu.edu/story/344459/2015/02/11/research/dragonfly-gut-infections-suggest-environmental-role-obesity)
4th Dec 2014: New publication
Hornett EA, Moran B, Reynolds LA, Charlat S, Tazzyman S, et al. (2014) The Evolution of Sex Ratio Distorter Suppression Affects a 25 cM Genomic Region in the Butterfly Hypolimnas bolina. PLoS Genetics 10(12): e1004822 article