What is the role of native bees in the United States?
About 75% of North American plant species require an insect—mostly bees—to move their pollen from one plant to another to effect pollination.
Unlike the well-known behavior of the non-native honeybees, there is much that we don’t know about native bees. Many native bees are smaller in size than a grain of rice. Of approximately 4,000 native bee species in the United States, 10% have not been named or described.
About 20%-45% of native bees are pollen specialists, meaning that they use only pollen from one species (or genus) of plants. If that plant is removed, the bee goes away. If bees are removed, the plant doesn't reproduce. Some of the native bees are specialists on the very plants that we use for food, including squashes, pumpkins, gourds, and the annual sunflower.
In almost all crops, native bees are the primary pollinator or they significantly supplement the activity of honey bees. Even crops like cotton, soybeans, and peppers that don’t need a pollinator have a higher yield if they’re visited by bees.
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Does the loss of plant diversity affect the health of native bees? Does the loss of plant diversity affect the health of native bees?
Loss of plant diversity is the primary cause of native bee decline. About 30-50% of all native bees are highly specialized, so if the plant they rely on disappears, the bees go away. If the bees disappear, the plant is unable to reproduce and dies out. While some of the plants pollinated by native bees are important food crops, other plants pollinated by native bees are critical for healthy...
Related
Does the loss of plant diversity affect the health of native bees? Does the loss of plant diversity affect the health of native bees?
Loss of plant diversity is the primary cause of native bee decline. About 30-50% of all native bees are highly specialized, so if the plant they rely on disappears, the bees go away. If the bees disappear, the plant is unable to reproduce and dies out. While some of the plants pollinated by native bees are important food crops, other plants pollinated by native bees are critical for healthy...