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The study, published Wednesday in Molecular Ecology, looked at the impact of two neonicotinoid pesticides on bumblebee populations and found that they impacted genes involved in a variety of important biological processes.
"Governments had approved what they thought were 'safe' levels but pesticides intoxicate many pollinators, reducing their dexterity and cognition and ultimately survival," lead study author Dr. Yannick Wurm of Queen Mary's School of Biological and Chemical Sciences said in a press release. "This is a major risk because pollinators are declining worldwide yet are essential for maintaining the stability of the ecosystem and for pollinating crops."
Pesticides found to affect genes in bees www.youtube.com
Previous studies had looked at the impact of neonicotinoids on the behaviors of bees, showing that exposure impaired their ability to forage and develop colonies. But this study, conducted by researchers at Queen Mary University of London and Imperial College London, focused on how those impacts occur on the molecular level.
"Our work reveals that neurotoxic pesticides not only directly target the cells of the nervous system, but also indirectly affect the normal activity of the exposed organism's genes," study author Dr. Richard Gill of the Department of Life Sciences at Imperial College London said in a press release.
The researchers studied the impact of realistic concentrations of two neonicotinoids on bumblebees: clothianidin and imidacloprid. They found that clothianidin had a stronger effect and that queens and workers were impacted differently. Clothianidin exposure altered the activity levels of 55 worker genes, making 31 more active and the rest less active.
"This could indicate that their bodies are reorienting resources to try to detoxify, which the researchers suspect is what some of the genes are doing. For other genes, the changes could represent the intermediate effects of intoxication that lead to affected behavior," the Queen Mary press release explained.
For queens, 17 genes saw their activity levels altered, with 16 becoming more active.
While neonicotinoids were banned in the EU in 2018, they are still widely used elsewhere.
The researchers thought that the study mechanism could be used to assess the specific impact of pesticides on other pollinators.
"We examined the effects of two pesticides on one species of bumblebee. But hundreds of pesticides are authorised, and their effects are likely to substantially differ across the 200,000 pollinating insect species which also include other bees, wasps, flies, moths, and butterflies," first study author Dr. Joe Colgan of Queen Mary University said.The study comes about a month after another study warned that insect populations around the world are in grave danger, and the widespread use of pesticides is one of the main reasons why.
- Pesticide harmful to bees allowed by EPA — Quartz ›
- 'Bee friendly' pesticide cuts colonies by half, study finds ›
- Invasion of the 'frankenbees': the danger of building a better bee ... ›
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‘Companies Should Not Be Allowed to Use Hazardous Ingredients in Products People Use’: Michelle Pfeiffer Speaks Up for Safer Cosmetics
The beauty products we put on our skin can have important consequences for our health. Just this March, the U.S. Food and Drug Administration (FDA) warned that some Claire's cosmetics had tested positive for asbestos. But the FDA could only issue a warning, not a recall, because current law does not empower the agency to do so.
Michelle Pfeiffer wants to change that.
The actress and Environmental Working Group (EWG) board member was spotted on Capitol Hill Thursday lobbying lawmakers on behalf of a bill that would increase oversight of the cosmetics industry, The Washington Post reported.
By Julia Conley
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President Donald Trump has agreed to sign a $19.1 billion disaster relief bill that will help Americans still recovering from the flooding, hurricanes and wildfires that have devastated parts of the country in the past two years. Senate Republicans said they struck a deal with the president to approve the measure, despite the fact that it did not include the funding he wanted for the U.S.-Mexican border, CNN reported.
"The U.S. Senate has just approved a 19 Billion Dollar Disaster Relief Bill, with my total approval. Great!" the president tweeted Thursday.