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Johnson Lab

Welcome to the Dark Side of Biology

Brevoortia tyrannus, parasitic isopod, Olencira praegustator, Atlantic menhaden
Invasion of the Isopods

Former undergraduate student Dylan Rose published his honors thesis on Olencira praegustator, an isopod that parasitizes the mouths and gill chambers of economically important fish.

Ribeiroia ondatrae, pacific chorus frog, pacific tree frog, Pseudacris regilla, malformation
Disease's Hidden Death Toll

In a new study, Mark Wilber and colleagues combine information on parasite distributions, extensive field data, and laboratory experiments to estimate – for the first time – how many amphibians die annually from trematode parasite infection.  

alpine lake, zooplankton, ice-off, Kelly Loria
Life on Top of the World

In a new paper from Journal of Plankton Research, Kelly Loria, Kyle Christianson, and Pieter Johnson use a decade of data from an alpine lake in Colorado to understand how shifting climate is altering the zooplankton community.

California wetlands, Johnson Lab, Research, Amphibians
Welcome Home, Field Team!

Despite the current pandemic, the Johnson Lab 2020 Field Team was able to collect host and parasite data from 80 ponds and wetlands in California this summer. Way to go!

California wetlands, Johnson Lab, NSF
Enhancing Integration Between Research and Management

Graduate student Wynne Moss was awarded an NSF-INTERN supplement! She will be analyzing amphibian data with agencies in California.

Alpine lake
The Life Aquatic in High Relief

We are excited to announce a new publication as part of a special issue in Aquatic Sciences on mountain lake ecology. Led by Kelly Loria, the study involved an extensive survey of lakes across an elevational gradient.

Travis at pond
Phenology Meets Pathology

In a newly published article in the Proceedings of the Royal Society Series B, Ph.D. candidate Travis McDevitt-Galles highlights how phenological synchrony between infectious parasites and vulnerable hosts is a key determinant of disease risk.

Pieter Johnson, Hazel Barnes Prize winner, Johnson Lab
Hazel Barnes Prize Winner

Please join us in congratulating Dr. Pieter Johnson, who was awarded CU's most distinguished award a faculty member can receive! 

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What We Do

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, Parasites, Frogs, Ribeiroia

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, ecosystem, Johnson Lab

Our Troubled Waters

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.

Conservation, management, climate change, ecosystem, Johnson Lab

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.

Check out our other projects!

Interested in learning more about the Johnson Lab? Find out more about specific projects by checking out our other websites. If you would like to support future research, click the link below to make a donation to the Johnson Lab.

Malformation Nation Parasite Observatory Donate Here!

Johnson Laboratory

Ecology and Evolutionary Biology 
Ramaley N122, CB334
University of Colorado 
Boulder, CO 80309-0334
303.492.5623

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