Career and Research Goals
1) To be a professional researcher or extension specialist affiliated with an academic university or a resource agency, enabling applied research and coordination of public outreach activities.
2) To restore ecosystems undergoing species invasions or anthropogenically induced community changes.
3) To utilize biological control as a tool to control invasive species below ecological and economic thresholds.
2008-2015: Ph.D. University of California, Berkeley
Environmental Science, Policy and Management, Advised by Nicholas J. Mills
2004-2007: B.A. University of California, Santa Barbara
College of Creative Studies: Biology
Global Change Biology, Biological Control, Insect Ecology, Multitrophic Interactions, Marine Biology, Aquaculture and Parasitology
Species invasions, range expansions, and fluctuations in abundance, are some of the consequences and causes of environmental change. My dissertation examines why many invasive species increase in abundance and have substantial negative impacts in their new region while other invasive species decline and lack significant negative impacts. Contrary to the trend for most invasive species, the invasive Light Brown Apple Moth has been in decline since its initial spread in California in 2007. My work focuses on the multitrophic interactions and resident natural enemies involved in the decline of this moth in California and provides a unique opportunity to use this knowledge to inform control efforts for other invasive or nuisance species.
Objectives of Dissertation Research:
1) Estimate the degree of variation in parasitism by parasitoid wasps of egg and larval stages of the Light Brown Apple Moth on different host plant species in the field and the laboratory.
2) Characterize the novel microsporidian pathogen, Nosema fumiferanae-like isolate, and its pathology in the Light Brown Apple Moth
3) Determine the occurrence and load of N. fumiferanae postvittana in field populations of the Light Brown Apple Moth using qPCR.
4) Investigate the role of host plant nutritional quality and infection by the pathogen, N. fumiferanae postvittana, on life history parameters of the exotic Light Brown Apple Moth.
Hopper, J.V., Huang W-F, Solter L.F., Mills N.J. (In Press). Pathogenicity, morphology, and characterization of a Nosema fumiferanae isolate (Microsporidia: Nosematidae) from the light brown apple moth, Epiphyas postvittana (Lepidoptera: Tortricidae) in California. Journal of Invertebrate Pathology.
Hopper, J.V. and Mills N.J. (In Press). Pathogenicity, prevalence and intensity of a microsporidian infection by Nosema fumiferanae postvittana in the light brown apple moth, Epiphyas postvittana, in California. Journal of Invertebrate Pathology.
Hopper J.V. and Mills N.J. 2015. Consequences of infanticide for a gregarious ectoparasitoid of leafroller larvae. Ecological Entomology 40: 461-470.
Hopper J.V., Kuris A.M., White C., Lorda J., Koch S.E., Hechinger R.F. 2014. Reduced parasite diversity and abundance in a marine whelk in its expanded geographic range. Journal of Biogeography 41: 1674–1684.
Hopper J.V., Nelson E.H., Daane K.M., Mills N.J. 2011. Growth, development and consumption by four syrphid species associated with the lettuce aphid, Nasonovia ribisnigri, in California. Biological Control 58: 271-276.
Hopper J.V., Poulin R., Thieltges D.W. 2008. Buffering role of the intertidal anemone Anthopleura aureoradiata in cercarial transmission from snails to crabs. Journal of Experimental Marine Biology and Ecology 367: 153-156.
2014 Marc Dresden Travel Award, American Society of Parasitologists
2012-14 Robert and Peggy van den Bosch Memorial Scholarship
2012-13 Outstanding GSI award, Department of Integrative Biology, UC Berkeley
2012 Northern California Parasitologists Meeting Award- research presentation
2012 Lillian and Alex Feir Graduate Student Award – ESA research presentation
2008-09 NSF GRFP: Two Honorable Mentions
GSI for ESPM 50AC, Culture and Natural Resource Management, Summer 2015
GSI for ESPM 44, Biological Control, Fall 2014
GSI for ESPM 113, Insect Ecology, Spring 2014
GSI for ESPM 147, Field Entomology, Spring 2014
GSI for ESPM C107/IB 158LF, Biology and Geomorphology of Tropical Islands, Fall 2013
GSI for ES 100, Methods in Environmental Sciences, Spring 2013
GSI for Bio1B Field Section, Spring 2012