No bees, no plants

James Gorman has an article in The New York Times about the bee problem:

The loss of bees and other pollinators around the world is already cause for concern. Now two researchers who studied bumblebees in Colorado have added a new worry, identifying the perils of bumblebee infidelity, not to other bees, but to their floral partners.
Berry J. Brosi, an assistant professor at Emory University in Atlanta, and Heather M. Briggs, a graduate student at the University of California at Santa Cruz, both in environmental science, studied twenty plots of meadow at the Rocky Mountain Biological Laboratory in Crested Butte, Colorado, each about twenty yards on a side.
With help from a number of students, they tested what happened if they removed the most populous bumblebee species by catching them with butterfly nets, and patrolled the plots to keep them out.
The prevailing view, Dr. Brosi said, based on mathematical models, was that all the other bumblebee species would take up the slack and the plants would do fine. But that was not so for the tall larkspur, a lovely purple wildflower.
Researchers found that the remaining bumblebees became less faithful to one flower species than they had been before the removal of the most numerous bees. They took advantage of less competition to play the field, or the plot.
All well and good for the bees, at least in the short term, but the larkspur, which the researchers targeted for this study, did not do as well, because bees that once would have stuck with the larkspur now carried pollen from a variety of other flowers when they visited their once exclusive floral partner.
But the larkspur needs pollen from its own species to reproduce, and suffered for the bumblebees’ wayward ways.
Because of the unfaithful bees, the researchers reported in Proceedings of the National Academy of Sciences, plants produced about thirty percent less seed. The finding, they report, shows a surprising effect from a loss of biodiversity that could have implications for a variety of ecosystems.

Rico says people won't get it until it's too late, but we're screwed...