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Study shows that glyphosate impairs learning in bumblebees: a wake-up call for insect conservation

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Study shows that glyphosate impairs learning in bumblebees: a wake-up call for insect conservation Glyphosate-Bumblebees-1690883851417


Study shows that glyphosate impairs learning in bumblebees: a wake-up call for insect conservation


As the world grapples with the alarming decline of insect populations, scientists are delving deeper into the potential contributions of agrochemicals to this crisis. Beyond merely assessing mortality rates, researchers are now scrutinizing the non-lethal effects of these chemicals on insect fitness. This urgent investigation seeks to uncover the hidden impacts that could jeopardize the delicate balance of ecosystems and threaten the vital role of insects in sustaining life on Earth.
In a recent study conducted by biologists at the Zukunftskolleg, University of Konstanz, the long-term exposure to glyphosate, a widely used herbicide, has been found to have significant repercussions on bumblebees’ essential abilities and survival. The study’s findings serve as a stark reminder that the consequences of agrochemical use reach far beyond target pests and plants. As the global insect decline continues unabated, understanding the intricate relationship between chemicals and pollinators becomes paramount for the preservation of biodiversity and the security of our food supply. With bumblebees serving as crucial pollinators for a wide array of crops and wild plants, their wellbeing is intricately tied to the wellbeing of our ecosystems and agricultural systems.
The Unsettling Findings
The study led by biologist Morgane Nouvian, along with Anja Weidenmüller and James J. Foster, examined the impact of glyphosate exposure on bumblebees’ locomotion, phototaxis (movement in response to light), and learning abilities. Contrary to previous focus solely on lethal effects, this study sheds light on the equally crucial non-lethal consequences that can hamper an individual bee’s chances of reproduction and survival.
A year prior to this study, Weidenmüller’s research revealed that bumblebee colonies chronically exposed to glyphosate exhibited disrupted thermal behavior, particularly in scarcity conditions. These bumblebees struggled to maintain the necessary warmth for their brood, leading to slower or incomplete brood development, a crucial aspect of their survival.
Disturbing Learning Impairment
The current study involved testing over 400 bumblebee workers, and the results were troubling. Bumblebees exposed to glyphosate were unable to associate a possible threat with a visual cue during a learning task. As Nouvian explains, “As far as we can see, they don’t learn at all anymore.” This impaired aversive learning ability can have severe implications for their survival, as it reduces their chances of avoiding dangers like poisons, predators, and parasites.
The learning impairment caused by glyphosate exposure could lead to a higher mortality rate among foragers, ultimately impacting the overall success of the colonies. The consequences of a depleted workforce would be significant, although further experimental confirmation is needed to establish the full extent of the impact.
Effects on Locomotion and Phototaxis
The study also examined the effects of glyphosate exposure on bumblebees’ locomotion and phototaxis. While the exposure slightly reduced the bees’ walking speed during habituation to the training apparatus, the phototactic drive, or their response to light, was largely unaffected. However, the bumblebees displayed reduced attraction to ultraviolet light compared to blue light. This shift in UV sensitivity could have wide-ranging implications, potentially affecting their navigation and foraging efficiency.
A Wake-Up Call for Pollinator Conservation
In light of these unsettling findings, the study’s authors propose their assay, known as yAPIS, a fully automated, high-throughput apparatus, as a method to systematically investigate the impact of agrochemicals on insects, particularly pollinators. By providing data about potential non-lethal effects, this approach could complement the current toxicity evaluations based solely on mortality rates.
In a world already grappling with the crisis of declining insect populations, this study serves as a crucial wake-up call to the devastating impact of glyphosate on bumblebees. As the debate over agrochemical use and its implications continues, prioritizing the conservation of pollinators and the delicate balance of our ecosystems becomes an urgent imperative.

THANKS TO: https://nexusnewsfeed.com/article/wake-up-world/study-shows-that-glyphosate-impairs-learning-in-bumblebees-a-wake-up-call-for-insect-conservation

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