Do managed bees drive parasite spread and emergence in wild bees?

Area of Science:

• Ecology
• Conservation Biology
• Entomology

Background:

• Managed bees (honey bees and bumblebees) have been utilized globally for centuries, primarily for honey production and increasingly for pollination services.
• Intensified management and global transport of managed bees since the mid-20th century have led to unprecedented densities in various ecosystems.
• The ecological role of managed bees extends beyond pollination, with potential implications for native pollinator health.

Purpose of the Study:

• To review the domestication and deployment practices of managed bees.
• To examine the evidence linking managed bee populations to adverse effects on wild bee health.
• To discuss global correlations between managed bee use and declines in wild bee health.

Main Methods:

• Literature review synthesizing existing research on managed bee deployment and wild bee health.
• Analysis of studies reporting on parasite dynamics and disease prevalence in wild bee populations.
• Examination of geographical correlations between managed bee densities and wild bee health indicators.

Main Results:

• Evidence suggests that the importation and deployment of managed bees can introduce novel parasites or alter existing parasite dynamics, increasing disease prevalence in wild bees.
• Global territories show correlations between the increased presence of managed bees and observed decreases in wild bee health.
• Unnaturally high densities of managed bees may outcompete wild bees for resources or facilitate pathogen transmission.

Conclusions:

• Managed bee populations pose a significant threat to the health and conservation of wild bee communities worldwide.
• Understanding the ecological impacts of managed bee deployment is crucial for developing effective conservation strategies.
• Mitigation measures are needed to reduce the negative effects of managed bees on wild bee populations and biodiversity.