The Effects of Fungicides on Bumble Bee Colonies | HHMI BioInteractive Video

The video discusses the potential harmful effects of Fungicides on bumble bee colonies, particularly focusing on their impact on Bee Larvae through the disruption of beneficial fungi. Key scientific concepts and findings include:

• Microbial Interaction: Bumble Bees rely on a mixture of pollen and yeast (fungi) to feed their larvae. These yeasts play a crucial role in preserving the pollen and providing nutrition.
• Fungicide Impact: Fungicides, while designed to target fungi, may inadvertently harm the beneficial yeasts that are essential for the development of Bee Larvae.
• Research Methodology:
  • Dissection of bumblebee nests to analyze the microbial content of pollen provisions.
  • Culturing microbes from the pollen to identify their types.
  • Conducting an experiment with bumblebee colonies placed in outdoor cages, with half of the flowers treated with Fungicides.
  • Monitoring colony growth over a month to compare control groups with those exposed to Fungicides.
• Findings:
  • Control colonies averaged 43 individuals, while fungicide-exposed colonies averaged only 12, indicating a significant decline in colony size due to fungicide exposure.
  • The study suggests that Fungicides may not directly harm adult bees but can have detrimental effects on larvae, leading to colony declines.
• Future Research: There is a need for further studies to understand the effects of various Fungicides on different bee species and to inform agricultural practices that minimize harm to pollinators.

Researchers or Sources Featured:

• Sean Stefan, University of Wisconsin
• HHMI BioInteractive