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

Action: Increase the diversity of nectar and pollen plants in the landscape for bees Bee Conservation

Key messages

Read our guidance on Key messages before continuing

One large replicated controlled trial showed that the average abundance of long-tongued bumblebees on field margins was positively correlated with the number of pollen and nectar agri-environment agreements in a 10 km grid square.


Supporting evidence from individual studies


In a replicated controlled trial in thirty-two 10 km grid squares across England (Pywell et al. 2006), the abundance of long-tongued bumblebees, mostly common carder bee B. pascuorum and garden bumblebee B. hortorum, recorded on trial field margins (various planting treatments) was positively correlated with the total number of pollen and nectar-mix agri-environment agreements in each 10 km square. There is no record of the numbers of long-tongued bumblebees in these grid squares before the agreements were implemented.

Referenced papers

Please cite as:

Dicks, L.V., Showler, D.A. & Sutherland, W.J. (2010) Bee conservation: evidence for the effects of interventions. Pelagic Publishing, Exeter, UK