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Plant-Insect Ecosystems

Poster: P-IE, Pollinator Biology and Ecology

Genetic diversity of Bombus impatiens in its native and invaded ranges in North America

Tuesday, November 11, 2025
9:00 AM - 5:00 PM Pacific
Location: Exhibit Hall A-A1, OCC
Poster Display
The common eastern bumble bee, Bombus impatiens Cresson, is native to lands east of the Great Plains in North America. The species was domesticated for greenhouse and field pollination services, and subsequently became established in the wild in western British Columbia in the early 2000s outside of its native range. It is now among the most common Bombus species in southwestern British Columbia and is rapidly expanding its range south into the United States. It is not clear if the western population is only derived from a few limited introductions, or if ongoing use of domesticated colonies continues to add genetic diversity to the region. We analyzed molecular data from multiple specimens collected in British Columbia and Washington State, and compared results with a large dataset previously compiled in its native range. Initial results indicate that the BC and WA population is largely panmictic and establishes numerous nests in its invaded range. Comparison of these results with data from its native range is pending.