09 Nov '17, 11am

Urban Refuge: How Cities Can Help Rebuild Declining Bee Populations

Urban Refuge: How Cities Can Help Rebuild Declining Bee Populations

Amid the heartening news about urban bees, however, some uncomfortable questions are being raised. Can the non-native plants used in most gardens harm remnant native plant populations in urban settings, many of which harbor threatened species? And are urban gardens encouraging the spread of aggressive non-native bees that could outcompete declining natives? Remarkably little is known about wild bees, an astonishingly diverse group of more than 20,000 species worldwide. In the U.S., bees range in size from the hefty carpenter bee to tiny Perdita minima , a Southwestern native less than .08 inch long. In addition to flowers, bees require places to nest. Unlike the European honeybee, which lives in hives, most bees are solitary and nest in tunnels they excavate in soil or wood. Imagine you are a bee attempting to navigate an urban landscape. If you are one of the many species...

Full article: http://e360.yale.edu/features/urban-refuge-how-cities-can...

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builditgreen.org 16 Nov '17, 4pm

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