Welcome to the Dark Side of Biology!

  • Hazel Barnes Prize winner

    Please join us in CELEBRATING our very own fearless leader, Dr. Pieter Johnson who was awarded CU's most distinguished award a faculty member can recieve! 

  • Wynne earns Bev Sears Grant

    Nine EBIO Graduate Students were awarded funding from the Graduate School through the Beverly Sears Grants and our Wynne Moss was one of them! 

  • Does your mother matter?

    Our newly published work in Experimental Parasitology lead by Dr. Will Stutz provides a reistance and tolerance framework that compares individual versus family level host traits in California newts.  

  • We are growing!

    Please help us welcome Brendan Hobart to the Johnson Laboratory as our new graduate student!

  • Meet Tara Stewart Merrill our new Post Doc

    It's offical--Tara Stewart Merrill PhD from University of Illinois Urbana-Champaign will be joining the Johnson Laboratory in August! 

  • PC Dylan Rose

    Who's got bumps?

    Dana Calhoun and team pub  was released on the cosmopolitan parasite, Clinostomum, that infects fishes, amphibians, reptiles and snails as intermediate hosts. 

Our research focuses on two pervasive and inter-related forms of biological change: disease emergence and species invasions. Both have important consequences not only for individuals and populations, but for entire ecological communities and ecosystem processes. Invasions and disease can also have costly economic and health repercussions for human society.  Our group strives to bring a broad perspective to these questions by combining field experiments, large-scale spatial and temporal field data, molecular tools and ecological modeling.

Disease Community Ecology


We apply approaches from community ecology to better understand and manage contemporary disease threats of humans and wildlife, which are often the product of interactions among multiple host species, coinfecting parasites, and other species

Our Troubled Waters

Hog Lake manipulation

Lakes, rivers, ponds and streams have become some of the most imperiled habitats on earth. Our group uses diverse tools ranging from genomics to ecosystem experiments to understand how freshwater systems are changing and at what cost

Complexity in Conservation


Effective management requires approaches than can measure, anticipate and ameliorate the consequences of interactive stressors, such as land use change, pollution, invasive species and climate shifts