| Abstract: | In recent times, pinyon (Pinus spp.)-juniper (Juniperus spp.) woodlands have expanded into large portions of the Southwest historically occupied by grassland vegetation. From 1997a??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. |
| Genre: | Article |
| ProdID: | 1016195 |
| Citation Author: | Rosenstock, Steven S.; van Riper, C. III |
| Citation Contributing Office: | Forest and Rangeland Ecosystem Science Center |
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| Citation End Page: | 232 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Range Management |
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| Citation Month: | MAY |
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| Citation Number Of Pages: | 7 |
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| Citation Phsyical Description: | p. 226-232 |
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| Citation Search Results Text: | Breeding bird response to juniper woodland expansion; 2001; Article; Journal; Journal of Range Management; Rosenstock, Steven S.; van Riper, C. III |
| Citation Start Page: | 226 |
| Citation Volume: | 54 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Breeding bird response to juniper woodland expansion; 2001; Article; Journal; Journal of Range Management; Rosenstock, Steven S.; van Riper, C. III |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 2001 00:00 -0600 |
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