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: Forest corridors appear to have limited impacts on boreal birds in Canada

Published source details

Hannon S.J. & Schmiegelow F.K.A. (2002) Corridors may not improve the conservation value of small reserves for most boreal birds. Ecological Applications, 12, 1457-1468

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

Ensure connectivity between habitat patches Bird Conservation

A replicated, controlled study as part of the same study as Mactans et al. (1996) in mixed boreal forests in northern Alberta, Canada (Hannon et al. 2002), found significantly higher abundances of resident songbirds and woodpeckers, but not of forest specialists, in forest plots connected to a continuous block when compared to isolated fragments. Resident species were found at similar abundances in connected fragments and unfragmented forests, whilst habitat generalists were found at similar abundances across all forest types. None of the individual species analysed appeared to benefit from connectivity. Forest fragments were 10 or 40 ha, either in continuous forest, isolated by a 200 m strip of clearcut on all sides or isolated on three of four sides for connected fragments. Three replicates of each treatment were established in the winter of 1993-4 and monitored until 1998.