Pity the poor honeybee. Since 2003, bee colonies around the globe have declining at an alarming rate. And since bees play a vital role in agricultural production, that's bad news for us humans. Scientists suspect many factors may be responsible, including pesticides, viruses, the varroa mite, genetically modified crops, and even exceptionally cold winters. Now we can add cellphones to the list of possible culprits, reports PC World.
A study by Swiss researcher Daniel Favre shows that mobile phone-generated electromagnetic fields may contribute to Colony Collapse Disorder (CCD), a condition that causes worker bees to desert the hive. In most cases, the queen bee is left with eggs, immature bees, and a lot of honey. The colony survives for a short time, but soon dies out without its workers.
"Recent efforts have been made to study another potential cause responsible for bee losses: manmade electromagnetic fields," Favre writes. And while the results obtained to date have been "highly controversial," they suggest a connection between the growing use of cellphones and a declining bee population.
Earlier studies have shown that cordless telephones placed at the bottom of beehives altered the behavior of honeybees that returned to the hive after foraging. However, other reports have failed to find a connection between mobile phones and colony collapse.
The researcher recorded sounds produced by bees in five healthy hives in two Switzerland locations between February and June 2009. The study recorded the bees' sounds with active mobile phones in the hive. Two mobile handsets (900MHz GSM) were chosen at random.
The bees were also recorded during their normal activities, both with and without inactive mobile phones.With the active devices, the first handset was triggered to call the second phone in the hive. A connection was made after 5 to 10 seconds of ringing.
Sound analyst shows the bees weren't disturbed by inactive or standby mobile phones. However, active cellphones confused the bees, creating "worker piping," or a signal to leave the hive.
The findings suggest that "the behavior of the bees remained perturbed for up to 12 hours after the end of the prolonged mobile phone communication," Favre writes. "This observation means that honeybees are sensitive to pulsed electromagnetic fields generated by the mobile telephones."
