The Problem with Honey Bees - Scientific American

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Page 1 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ C O N S E R V A T I O N | O P I N I O N The Problem with Honey They’re important for agriculture, but they’re not so good for the en Save 25% on all subscriptions Subscribe By Alison McAfee on November 4, 2020
Page 2 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ Credit: Ed Peeters Getty Images To many people, honey bees symbolize prosperity, sustainability and environmentalism. But as a honey you that only the first item on that list is defensible. Although they are important for agriculture, honey ecosystems by competing with native bees—some of which are species at risk. The rise in hobby beekeeping , now a trendy activity for hundreds of thousands of Americans, followed s to “save the bees.” But as a species, honey bees are least in need of saving. Media attention disproportio native pollinators, and murky messaging has led many citizens—myself once included—to believe they a environment by putting on a beekeeper’s veil. Unfortunately, they are probably doing more harm than g “Beekeeping is for people; it's not a conservation practice,” says Sheila Colla, an assistant professor and Toronto’s York University, Canada. “People mistakenly think keeping honey bees, or helping honey bee native bees, which are at risk of extinction."
Page 3 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ Colla recently published an analysis of nearly a thousand comments submitted by citizens in response t Health Action Plan —a proposal that involved a plan for stricter neonicotinoid pesticide regulations. Des in bees and pollination and strong support of tighter pesticide regulations, Colla and her colleagues fou surprisingly poor understanding of the diversity of pollinators and their roles in pollination. “The focus on neonics [a kind of pesticide] and honey bees has taken a ton of resources away from cons their most important threats,” Colla says. She is justifiably frustrated at the misappropriated attention o from a conservationist’s point of view, native bees are the ones in more dire need of support. And while honey bee–centric businesses often support initiatives that benefit native bees, such as devel the financial contributions pale in comparison to what could be achieved if funds were applied to these “Beekeeping companies and various non-science-based initiatives have financially benefitted from the d Colla explains. “These resources thus were not allocated to the actual issue people are concerned about. For some reason, maybe because they are small, honey bees are not generally viewed as the massively d that they are. There are millions of honey bee colonies in North America, 2.8 million of which are in the 30,000 bees per colony (the size of a pollination unit ), that’s roughly a billion honey bees in Canada and triple the number of people. High densities of honey bee colonies increase competition between native pollinators for forage, putting wild species that are already in decline. Honey bees are extreme generalist foragers and monopolize flor exploitative competition—that is, where one species uses up a resource, not leaving enough to go aroun A D V E R T I S E M E N T
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Page 4 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ But determining honey bees' influence on natural ecosystems requires empirical testing. It is possible, f foraging habits of native bees—differences in their active times of day or preferred plants, for example— competition. Honey bees are so ubiquitous, though, that it has been hard to test exactly how their introd resource monopolization, affects ecosystem networks. Not so for the Canary Islands. Alfredo Valido and Pedro Jordano, researchers from the Spanish Nationa Tenerife and Sevilla, respectively, saw an opportunity to use these islands—a Spanish archipelago off th Africa—to study how the introduction of honey bees affects the native pollinating community. In the highlands of the islands’ Teide National Park, thousands of honey bee colonies are introduced sea production and removed again at the end of the nectar flow, creating an excellent scenario for experime published in Scientific Reports , do not make honey bees look like the sustainability celebrities they have Bringing in honey bees reduced the connectedness of the plant-pollinator networks. Nestedness and mo ecosystem resilience, also declined. While some plant species enjoyed higher fruit set, fruits sampled ne only aborted seeds. “The impact of the beehives is so dramatic,” says Valido, “You can detect disruption pollinators just the day after beehive installation.” “By introducing tens or hundreds of beehives, the relative density of honey bees increases exponentially pollinators,” Valido explains. This causes a drastic reduction of flower resources—pollen and nectar—w “Beekeeping appears to have more pervasive, negative impacts on biodiversity than it was previously as A D V E R T I S E M E N T Sign up for Scientific American ’s free newsletters. Sign Up
Page 5 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ Valido and Jordano suspect that their findings on the Canary Islands are generally applicable to other e are introduced, but they note that the specific impact of beekeeping in other locations may differ. Indeed, honey bees are not always the top competitor in a pollinator network: Whether they succeed at bees depends on other factors. For example, Nicholas Balfour and his colleagues at the University of Su native bumble bees were superior competitors on the tubular flowers of lavender, owing in part to their In still other ecosystems , honey bees appear not to be as influential as in the Canary Islands. After intro Patagonia, nonnative bumble bees and honey bees overtook the native bees as the most frequent floral v on the native bees’ actual visitation rates. While every ecosystem has its own quirks—with different pollinator players and participating plants—p conducted closer to home tend to agree with the findings in the Canary Islands. “There have been studie pollination system disruptions by honey bees,” says Colla. “Honey bees also are very effective at pollina which changes the overall plant communities.” Many of those weedy species are also invasive, including Scotch broom, dandelions, Himalayan blackbe among others. And beekeepers secretly love invasive plants. Their intense proliferation provides a lucra flow—perfect for the honey bees, and beekeepers, to capitalize on—but the plants, too, disrupt native ec A D V E R T I S E M E N T
Page 6 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ Even with this boost of forage, there is sometimes still not enough to go around amongst honey bees, le lower mainland surrounding Vancouver, Canada, I kept a small research apiary with 15–20 hives. It wa research colonies in a high-density area, and I have never struggled so much to keep my bees alive. The hives were riddled with diseases. I even euthanized one colony with symptoms of American foulbro it’s one of the most destructive, contagious diseases that honey bees face. Despite being entirely free of V devastating parasitic mite—at the start of the season, the hives required miticide treatments by late sum not produce a crop of honey. Colony densities in some locations have become too high, facilitating the spread of disease and exacerba nutrition. If it was this hard to keep my honey bees healthy, I’m not sure I can bear to think about the w But think about them, we must. I used to believe that honey bees were a gateway species, and that conce prosperity would spill over onto native bees, benefitting them, too. While this may have happened in so mounting that misguided enthusiasm for honey bees has likely been to the native bees’ detriment. Beek good, anymore. In fact, quite the opposite. A D V E R T I S E M E N T
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Page 7 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ ABOUT THE AUTHOR(S) Alison McAfee Alison McAfee , Ph.D ., is a post-doctoral fellow in the Department of Entomology and Plant Pathology, at North Carolina State University and author o the American Bee Journal since 2017, as well as other commissioned pieces . She specialized in studying honeybee social immune defense strategies Recent Articles Honey Bees Are Struggling with Their Own Pandemic READ THIS NEXT A D V E R T I S E M E N T S P O N S O R E D The Science of Feeding the World S P A C E Unrivaled View of Brilliant 'Planetary Nebula' NGC 2899 January 15, 2021 — Leslie Nemo P O L I C Y & E T H I C S Scientists Weigh In on India's Citizenship Debate 2 hours ago — Suvrat Raju | Opinion S P A C E Telescopes on Far Side of the Moon Could
Page 8 of 22 https://www.scientificamerican.com/article/the-problem-with-honey-bees/ Release Carbon, Instead of Absorbing It 21 hours ago — Chelsea Harvey and E&E News A D V E R T I S E M E N T
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