
A tiny single-celled parasite may have a greater-than expected impact on honey bee colonies, which have been undergoing mysterious declines worldwide for the past decade, researchers have discovered. Since 2006, beekeepers in North America and Europe have lost about one-third of their managed bee colonies each year due to «colony collapse disorder.» While the exact cause is unknown, scientists have speculated that pesticides, pathogens, mites and certain beekeeping practices have all contributed to this decline.
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