Researchers from North Carolina State University have found that urban environments increase pathogen abundance in honeybees and reduce honeybee survival. The research team found that colonies closer to urban areas and those managed by beekeepers had higher pathogen pressure. “Overall, we found that the probability of worker [bee] survival in laboratory experiments declined threefold in bees collected from urban environments, as compared to those collected in rural environments,” says associate professor of entomology Steve Frank. However, the researchers also found that immune response was not affected by urbanization. Because immune response was the same across environments, researchers think the higher pathogen pressure in urban areas may be due to increased rates of transmission, which could be because bee colonies have fewer feeding sites to choose from in urban areas, so they are interacting with more bees from other colonies.
This article appears in the February 2016 issue of Acres U.S.A.