Ice cream maker Haagen-Dazs is donating $100,000 to the University of California, Davis, to research an alarming decline in the bee population.

The money will go for research on "sustainable pollination" and the phenomenon known as colony collapse, a disorder in which bees abandon their hives.

About 40 percent of Haagen-Dazs ice cream flavors are linked to fruit and nut trees pollinated by bees. The company also is launching a national campaign to create awareness of the honeybee's plight.

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A third of the U.S. food supply depends on bee pollination, but bees are vanishing in massive numbers, said Walter Leal, chairman of the UC Davis Department of Entomology.

The university is home to one of the oldest bee research facilities in the country.