A recent study reveals that probiotic and prebiotic supplements may enhance honeybee survival rates during extreme temperature fluctuations, offering a potential lifeline for these vital pollinators. Co-authored by researchers from Canada and Iran, the findings underscore the critical role of honeybees in global agriculture, with Canada alone generating an estimated $7 billion in harvest value from these industrious insects.
The Dilemma of Honeybee Mortality
Every winter, Canadian beekeepers grapple with alarming colony losses, a trend that continued with a staggering 39.3 per cent of colonies lost in 2024-25. The primary culprits of this decline include parasitic mites, starvation, and severe temperature variations. As climate change intensifies, ensuring the survival of honeybees has become paramount not just for honey production, but also for pollination services essential to food production.
In a study published in the peer-reviewed journal PLOS One, researchers explored how incorporating probiotics—live beneficial bacteria—and prebiotics—indigestible fibres that nourish these bacteria—into the diet of honeybees could mitigate these losses. The research highlights the potential of these supplements to help bees endure extreme temperatures, whether they be scorching heat or frigid cold.
A Global Perspective on Beekeeping Challenges
The collaboration between Canadian and Iranian researchers is particularly noteworthy. While Canada faces the challenge of winter mortality, Iran confronts the adverse effects of extreme heat on honeybee populations. Rassol Bahreini, a senior researcher at the University of Alberta and one of the study’s authors, elaborated on this dichotomy: “In Canada, we are focused on research to reduce winter mortality for beekeepers. In Iran, where the climate is hot, the challenge is the opposite.”
According to the Food and Agriculture Organization (FAO) of the United Nations, Iran ranks as the fifth-largest honey producer worldwide, following China, India, Turkey, and Ethiopia. Like Canada, Iran’s agricultural sector heavily relies on pollinators, making the health of honeybee populations critical for both nations.
The Science Behind Survival
The study’s results indicate that honeybees given sugar water supplemented with prebiotics and probiotics exhibited longer survival rates under varying temperature conditions of 4, 15, 35, and 40 degrees Celsius, compared to those without the supplements. Interestingly, a higher concentration of these supplements correlates with improved survival rates.
Although the exact mechanisms by which these supplements enhance bee survival are not fully understood, the researchers suggest that probiotics may help improve energy conservation in bees, thus enabling them to better regulate their internal temperatures during stressful conditions. Furthermore, these beneficial bacteria could bolster the bees’ immune responses, offering additional protection from infections during adverse weather.
Looking Ahead: Future Research and Implications
Dr. Bahreini is poised to delve deeper into the potential benefits of these supplements in upcoming research, particularly regarding their effects on honeybee resilience against pesticide exposure. Leonard Foster, a honeybee researcher at the University of British Columbia, highlighted the significance of this study, noting its implications for managing bee populations amid increasing climate-related stresses.
“The direction that is more worrisome for most people right now is the higher temperatures,” Dr. Foster remarked, pointing out that while colder temperatures can often be mitigated through beehive insulation, extreme heat presents a far more complex challenge.
Why it Matters
The implications of this study extend beyond the survival of honeybees; they resonate throughout the agricultural landscape and ecosystems that rely on these pollinators. As climate change continues to threaten bee populations, innovative solutions like probiotic and prebiotic supplementation may offer a crucial strategy for mitigating losses and ensuring the stability of food production systems worldwide. As we strive for sustainable agricultural practices, understanding and improving honeybee health could pave the way for a more resilient future.
