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Breeding bird response to juniper woodland expansion

January 1, 2001

In recent times, pinyon (Pinus spp.)-juniper (Juniperus spp.) woodlands have expanded into large portions of the Southwest historically occupied by grassland vegetation. From 1997-1998, we studied responses of breeding birds to one-seed juniper (J. monosperma) woodland expansion at 2 grassland study areas in northern Arizona. We sampled breeding birds in 3 successional stages along a grassland-woodland gradient: un-invaded grassland, grassland undergoing early stages of juniper establishment, and developing woodland. Species composition varied greatly among successional stages and was most different between endpoints of the gradient. Ground-nesting grassland species predominated in uninvaded grassland but declined dramatically as tree density increased. Tree- and cavity-nesting species increased with tree density and were most abundant in developing woodland. Restoration of juniper-invaded grasslands will benefit grassland-obligate birds and other wildlife.

Citation Information

Publication Year 2001
Title Breeding bird response to juniper woodland expansion
DOI 10.2307/4003238
Authors Steven S. Rosenstock, Charles van Riper
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Range Management
Index ID 1016195
Record Source USGS Publications Warehouse
USGS Organization Forest and Rangeland Ecosystem Science Center