Disappearing Bees
About a quarter of all known bee species haven’t been seen since the 1990s even though efforts by scientists and amateurs to survey them have increased by about 55% since the turn of the century. Eduardo Zattara and Marcelo Aizen of Argentina’s National University of Comahue found that the decline isn’t the same for all bee populations, and the lack of sightings for those missing doesn’t mean the species have gone extinct. The researchers say it just means those bees are now rare enough that people who tend to report bee sightings aren’t coming across them. The destruction of natural habitats, heavy use of pesticides and climate change are likely to be causing the decline, according to Zattara.
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