Conservation Evidence strives to be as useful to conservationists as possible. Please take our survey to help the team improve our resource.

Providing evidence to improve practice

Individual study: Patches of bare ground provide nesting sites for solitary bees on an upland prairie restoration site at Fern Ridge Reservoir, Willamette Valley, Oregon, USA

Published source details

Severns P. (2004) Creating bare ground increases presence of native pollinators in Kincaid's lupine seeding plots (Oregon). Ecological Restoration, 22, 234-235


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Create patches of bare ground for ground-nesting bees Bee Conservation

Severns (2004) created 1 m2 plots of mostly bare ground whilst planting seeds of the endangered legume Kincaid's lupine Lupine sulphureus spp. kincaidii, in an upland prairie restoration project in Oregon, USA. The bare ground was colonised by an increasing number of nesting solitary bees, mostly of the common species Lasioglossum anhypops, over the following three years. Three years later, there were 320 nests over 30 plots.