Welcome to the Johnson Lab!


Principal Investigator

Dr. Pieter Johnson

Associate Professor in Ecology and Evolutionary Biology
Research Interests:

disease ecology, invasion biology, aquatic ecosystems


Postdoctoral Researchers

Research Interests:

aquatic ecology, limnology, mountain lakes, climate change

Research Interests:

host-parasite interactions, ecological immunology, community ecology, wildlife disease


Lab Personnel

Dana Calhoun ("Dain")

Professional Research Associate and Laboratory Manager
Research Interests:

wildlife parasitology, physiological costs of infection, host parasite interactions

David Saunders

REU Technician
Research Interests:

community ecology, marine biology, parasite ecology, limnology

Kelly Loria

Research Technician
Research Interests:

alpine lakes, zooplankton community dynamics, invasive species, climate change

Lauren Dycee-Holtz

Research Technician
Research Interests:

Parasitology, herpetology, environmental education, wildlife disease, wildlife rehabilitation

Sammy Yevak

Researcher Technician
Research Interests:

aquatic biology, marine biology, alpine lakes, climate change, environmental education

Sara Carpenter

REU Technician
Research Interests:

parasites, parasite interactions, predator prey relationships

Stephanie Townsend

Research Technician
Research Interests:

one health, wildlife health, managment

Zahra Barkley

Research Technician
Research Interests:

species interactions, cell physiology, and community ecology


Graduate Students

Brendan Hobart

PhD Student
Research Interests:

niche, biodiversity, parasitism, trophic interactions

Research Interests:

community ecology, invasive species, parasites of invertebrates

Wynne Moss

PhD student
Research Interests:

community ecology, predator-prey-parasite interactions, conservation, toxoplasmosis


Undergraduate Researchers

Research Interests:

herpetology, biodiversity, studio arts

Research Interests:

Spanish, ecology, aquatic biology, climate change

Research Interests:

health and wellness, disease pathology, evolution, and comparative anatomy and physiology

Research Interests:

parasite extended-phenotype hypothesis, parasite host-manipulation, vertebrate development, cell-signaling, epigenetic mechanisms, epithelial-mesenchymal feedback loops (EMIs)

Research Interests:

marine biology, parasitology, anatomy, species conservation, veterinary medicine

Research Interests:

herps, inter-specific interactions, community ecology, parasite lifecycles

Research Interests:

ecology, aquaponic systems, management, permaculture strategies

Research Interests:

marine biology, conservation, invasive species, community ecology

Research Interests:

marine biology and ecology, disease ecology, parasite ecology, anthropology, and veterinary medicine


Lab Alumni

Name Role Current Position
Dr. Chelsea Wood Postdoctoral Researcher Assistant Professor, University of Washington
Keegan McCaffrey Honors Student Centers for Disease Control and Prevention
Dr. Sarah Haas Postdoctoral Researcher Research Specialist, Texas Parks and Wildlife Department
Dr. Jason Hoverman Postdoctoral Researcher Assistant Professor, Purdue University
Dr. Sarah Orlofske PhD Student Assistant Professor, Northeastern Illinois University
Dr. Sara Paull Postdoctoral Researcher Postdoctoral Researcher, University Corporation for Atmospheric Research
Meg Summerside Honors Student
Ian Buller Masters Student PhD Student, Emory University
Dr. Joe Mihaljevic PhD Student Postdoctoral Researcher, University of Chicago
Dr. Katie Richgels PhD Student Research Scientist, National Wildlife Health Center
Dr. John Mischler PhD Student Assistant Professor, Kings College
Dr. Dan Preston PhD Student Postdoctoral Researcher, Oregon State University
Emily Hannon Honors Student
Dr. Max Joseph PhD Student Analyst, Earth Lab Analytics Hub
Dr. Will Stutz Postdoctoral Researcher