You all know by now that bees serve an important role in the environment as pollinators of flowering plants, many of which are important food crops. But did you know that bees also serve as defenders of the same plants? Researchers at the University of Wurzburg in Germany (site in German, sorry) have found that when bees are present, caterpillars on plants are less likely to chow down for a hearty meal.
This example of symbiosis illustrates how complex mutualistic relationships in nature can be. Imagine it: a bee, which is a pollinator of flowering plants such as soybeans (like the ones in the study) can also serve as the defender of the same plant! Talk about multitasking! But how could this relationship have evolved? What might have been the impetus for the bees to protect the plants they pollinate? Does this relationship increase the evolutionary fitness of bees, and if so, how? Does this relationship put the bees' evolutionary fitness at risk somehow? How would a phenomenon such as colony collapse disorder affect this relationship?
So this spring, when bees buzz about, they're not out to annoy you, they're really out to annoy the caterpillars feeding on the plants the bees pollinate. It's a beautiful mutualistic relationship.
Posted by scienceguru on January 9, 2009
Tags discuss, ecology, interdependence, science is cool!


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