The relationship between bees and climate change showed a concerning link in a recent Australian study.
Apparently, the increase in global temperature modifies the behavior of the European honeybee more intensely than the effects of urbanization.
This is indicated by the analysis conducted by a team from Monash University, which exposed these pollinators to different thermal conditions.
The results revealed that only the European honeybee reduced its attraction to light under intense heat, while Australian native species maintained their usual behavior.
This is relevant because the attraction to light plays an important role in the orientation of bees, which climate change can modify.
These pollinators use light references to move, recognize flowers, and return to their nests.
When this behavior is altered, it can decrease the efficiency with which they locate food. It also affects the coordination of their activities within the colony.
How the experiment analyzing the impact of climate change on bees was conducted
Dr. Scarlett Howard, from the School of Biological Sciences at Monash University, led the research.
The team worked with two species of bees: the Apis mellifera and native specimens of the genus Lasioglossum. With both, they measured their response speed to light sources.
The tests included exposure to ultraviolet light and artificial white light. The trials were conducted at 28 °C and 32 °C, using specimens from urban and natural environments in Melbourne.
In light of this, the researchers did not detect relevant differences according to the urban or natural origin of the insects. Both types of lighting generated similar responses in each species.
However, in the case of the European honeybee, a slower reaction to light stimuli under elevated temperatures could reduce its adaptability.
In this regard, increasingly frequent heatwaves due to climate change pose a growing challenge for this bee species.
The consequences of thermal stress on bees
The researchers pointed out that the thermal stress generated by climate change can interfere with the neurological and sensory processes of bees.
In particular, this interference affects their response capacity to various environmental stimuli.
Although the experiment focused on light attraction, scientists warn of similar changes in other behaviors. Among them are:
- Navigation and spatial orientation
- Communication between colony individuals
- Efficiency in nectar and pollen collection
- Recognition of flowers and food sources
Dr. Howard explained that this phenomenon “highlights the complexity of the interaction between multiple environmental factors in pollinators”.
The relevance of the study for conservation and agriculture
In light of this, the connection between bees and climate change becomes relevant for environmental and urban planning.
Today, cities concentrate higher temperatures due to the “heat island” effect.
This phenomenon could amplify the impact observed in certain pollinator species.
Therefore, identifying which species show greater sensitivity allows for anticipating imbalances in ecosystem services.
Specialists emphasize that the resilience observed in native bees could provide valuable insights. This information serves to design more effective conservation strategies that promote species diversity.
The study also warns about the need to deepen the analysis of the combined impact of climate change and urban expansion on bees.
In the case of the European honeybee, these behavioral changes could reduce pollination efficiency.
Possible consequences include effects on agricultural production and environmental stability.
In the long term, integrating this type of information into public policies will be key to sustaining biodiversity.
Moreover, the management of green spaces and productive planning will also need to consider these findings.
Ensuring the stability of food systems depends on better understanding the relationship between bees and climate change.
