07/27/2015 10:02 AM EDT
Blackberries and blueberries. Cherries and peaches. Raspberries and apricots. These and many other summer fruits require pollination by bees.
But remove even one bumblebee species from an ecosystem and the effect is swift and clear: Pollination is less effective, and plants produce significantly fewer seeds.
That's just one conclusion of scientists studying pollinators and what's happening to these important species across the U.S. and around the world.
To find out ...