Humans have hundreds of germ species in their guts—most bees have just nine.
may partly explain why: Bees with healthy microbial partners grow up to have more complex social relationships and even different brain chemistry from bees with sterile guts.
And in this study, the role of gut bacteria was stark. “This [finding] really shows that the gut microbiome may be vital to the functioning of the hive,” Liberti says. The essential role of those gut bacteria may also help explain bees’ vulnerability to human threats—particularly agricultural chemicals.
It might sound like a good thing to have egalitarian bees, but Liberti says that a colony with lots of specialized relationships is actually better at navigating the complexities of the world. “Not everybody is doing everything at the same time,” he says. “If you are doing brood care, you don’t care whether foragers found a food patch—you want information about the brood.”
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