Fire suppression has resulted in a greater density of ponderosa pine (Pinus ponderosa) in grassland and shrub-steppe habitats potentially reducing habitat quality for declining grassland and shrub-steppe birds. Birds were surveyed at 10 shrub-steppe sites in the southern Okanagan Valley of British Columbia to examine whether encroachment of pine affected grassland and shrub-steppe birds. Encounter rates did not differ between years and were combined for a total of 4,281 sightings and 80 species. Sites with more ponderosa pine had a greater diversity of birds. Grassland and shrub-steppe birds as a group declined with increasing numbers of trees. Forest and open woodland birds increased in number as did generalist birds. These results support conservation efforts to reduce conifer densities in shrub-steppe habitats to benefit associated declining bird populations.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 119 • No. 4