Are failing bees our warning sign?

first_imgIt’s become something of a rite of spring. Every March, newspaper stories sprout about local beekeepers opening their hives to find an ongoing environmental mystery.Instead of hungry bees ready for the first flights of spring, honeycombs that should be empty after a long winter are full, and instead the hives are empty. For some reason, during winter’s coldest months, these bees chose to leave the hive to perish outside.Colony collapse disorder, as the condition is known, remains a mystery with troubling implications for the fate of the human food supply, which depends, in part, on pollinators like the honeybee. Explanations that have been offered include pathogens, modern beekeeping practices, malnutrition, climate change, and pesticides.It is that last possible cause that stands out to Harvard School of Public Health’s (HSPH) Chengsheng (Alex) Lu, an associate professor of environmental exposure biology, who believes that the potential human health implications of colony collapse disorder extend beyond the drop in pollination — though that is worrisome enough — to the impact on humans of long exposure to low-level poisons like neonicotinoid pesticides, which have been suspected in the bee disorder. To Lu, it is an open question whether there are links between the pesticide and the recent increase in neurological conditions in children such as autism and ADHD.Lu has continued to investigate the possible links among neonicotinoids, bees, and human health, saying the honeybee is a good model organism for potential pesticide impact, as well as for potential effects across generations. Credit: WikipediaTo get to the bottom of the mystery, Lu has conducted pioneering research on the impact of neonicotinoid pesticides on honeybees. In a study published in 2012, he replicated colony collapse disorder experimentally, feeding bees sugar water with different levels of neonicotinoids over 13 weeks in the summer and watching what happened.At first, nothing did. The hives seemed unaffected and healthy as they got ready for winter. Then, the week before Christmas, roughly three months after the neonicotinoid treatment was halted, hives began to fail. Eventually 15 of 16 hives collapsed, even those treated with the lowest dose.The work was noted for providing a concrete link to neonicotinoids, which are the world’s most widely used group of insecticides.One particularly disturbing aspect of the work, which Lu described during a lunchtime “Hot Topics” talk on Aug. 12 at HSPH’s Kresge Building, is that the bees that abandoned the hive during the collapse weren’t the individuals that ate the sugar water laced with neonicotinoids. During summer’s period of high activity, bees live just 35 days, so the colony that collapsed contained the next generation of bees, indicating that the effect may have been passed on between generations.Lu has continued to investigate the possible links among neonicotinoids, bees, and human health, saying the honeybee is a good model organism for potential pesticide impact, as well as for potential effects across generations.Neonicotinoids, chemicals similar to the nicotine produced by tobacco plants, have become widespread in part because of their ease of use, Lu said. Because they’re water-soluble, the chemicals are taken up by a plant and spread throughout its tissues. Seed companies have made distribution even easier for farmers by coating seeds with the chemical, which ensures the plants sprouting from them contain the pesticide.The chemicals are present not just in food plants, but are also widely represented in nursery stock, including plants sold at major garden retailers, Lu said. They’re also found in the environment, and Lu said there are questions about their role in the loss of birds and aquatic invertebrates.Lu described it as a race against time to save the bees, which are routinely transported around the country by commercial beekeepers to pollinate agricultural fields. He spoke to one blueberry farmer who said that before colony collapse disorder struck, he would pay $250,000 to have his fields pollinated. Today that figure stands at $750,000, and the cost is passed on to consumers.Lu believes that the pesticide is fed to bees by unsuspecting beekeepers. The pesticide is widely used on corn, which is used to make high-fructose corn syrup. The corn syrup is mixed with water and routinely fed to bees by commercial beekeepers.Affected bees, which include wild honeybees, Lu said, exhibit a range of neurological conditions, including disorientation, flying back to the wrong colonies, and abandoning colonies in winter.“The [phrase] ‘bee-line’ is no longer valid,” Lu said. “The question … is do these things also apply to human health?”last_img read more

University appeals HHS ruling

first_imgThe University is again challenging a U.S. Department of Health and Human Services mandate that requires Notre Dame’s insurance plan to cover contraceptives, according to a report in The South Bend Tribune.Notre Dame is asking the U.S. Court of Appeals for the Seventh Circuit to grant the University an exemption to the mandate, which is part of the Affordable Care Act, in light of a recent Supreme Court decision, the Tribune reported. The Supreme Court ruled Jan. 24 that the nonprofit organization Little Sisters of the Poor and other similar religious groups do not have to cover contraceptives until the Sisters’ lawsuit is resolved.“There is no legitimate basis upon which an injunction could be granted to the Little Sisters of the Poor but denied to Notre Dame,” the University said in its motion, according to the Tribune.A federal appellate judge in Chicago will hear oral arguments in Notre Dame’s case Feb. 12, the Tribune reported.“If government is allowed to entangle a religious institution of higher education like Notre Dame in one area contrary to conscience, it’s given license to do so in others,” Paul Browne, vice president for Public Affairs and Communications, said.Tags: Contraception, HHS Lawsuit, HHS Mandate, Notre Dame, Supreme Courtlast_img read more

Chevron to take massive write-down due to Appalachian shale woes

first_imgChevron to take massive write-down due to Appalachian shale woes FacebookTwitterLinkedInEmailPrint分享S&P Global Market Intelligence ($):Chevron Corp. announced Dec. 10 it expects to take a noncash, after-tax impairment charge of $10 billion to $11 billion in the fourth quarter, with more than half of that figure related to Appalachia shale assets.The California-based supermajor plans to cut funding for various natural gas-related investments, including Appalachian shale assets and the Kitimat LNG project in Canada, as it evaluates its strategic alternatives for these assets, including possibly selling them. Noting that it expects weaker commodity prices for the long term, Chevron said it is also taking an impairment charge related to its Big Foot offshore oil project in the Gulf of Mexico.The company on Dec. 10 unveiled a $20-billion capital spending and exploration budget for 2020, spanning upstream and downstream investments, including projects in the Permian Basin, the Gulf of Mexico and Kazakhstan.The company said it will need approximately $11 billion to sustain and grow currently producing upstream assets. This includes about $1 billion for international unconventional development and $4 billion for Permian development. Chevron said previously that it intends to ramp output further into the next decade, with a focus on building out shale operations in the Permian Basin. Chevron hopes to boost its Permian production to 600,000 barrels of oil equivalent per day by 2020 and to 900,000 boe/d by the end of 2023.Approximately $5 billion of the upstream program is planned for major capital projects underway. Global exploration funding is expected to be about $1 billion. Additionally, Chevron is earmarking roughly $2.8 billion for its downstream business.[Amanda Luhavalja]More ($): Chevron to take $10B write-down on U.S. shale-related assets, mulls divestitureslast_img read more