Optimizing Field Protocols for Assessing Pathogen Loads in Bumble Bees

Bumble bees are essential pollinators, but their populations are declining due to habitat loss, climate change, and pathogens like Crithidia and Vairiomorpha. These pathogens spread through feces on flowers and within colonies, reducing bee fitness and survival. While pathogen levels are well-documented in mainland southern Ontario, little is known about their prevalence on Pelee Island, a potentially important refuge for at-risk species. This project aims to assess whether Pelee Island bumble bees have lower pathogen levels, which could make the island a key site for conservation efforts. In partnership with Wildlife Preservation Canada (WPC), we will conduct surveys to measure pathogen prevalence in bumble bees across the island and compare infection rates to mainland populations. Using a non-destructive fecal sampling method developed by WPC, we will refine techniques for monitoring bumble bee health and explore behavioural assays to improve pathogen detection. The intern will also assist with WPC’s conservation breeding program to identify healthy bees for rearing efforts. This research will improve pathogen monitoring, inform pollinator conservation strategies, and determine whether Pelee Island serves as a low-pathogen refuge. Findings will support WPC’s breeding programs and broader efforts to protect imperiled bumble bee populations and maintain biodiversity.

Faculty Supervisor:

Scott MacIvor

Student:

Partner:

Wildlife Preservation Canada

Discipline:

Life Sciences

Sector:

Professional, scientific and technical services

University:

University of Toronto

Program: