Skip to Main Content
Population Viability of Golden‐cheeked Warblers in an Urbanizing LandscapeAuthor(s): Jennifer L. Reidy; Frank R. Thompson; Lisa O'Donnell
Source: Wildlife Society Bulletin
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (1.0 MB)
DescriptionPopulation viability analyses can assess species persistence under current or simulated future conditions and guide conservation and management efforts for species of concern. We evaluated population viability of an endangered songbird, the golden‐cheeked warbler (Setophaga chrysoparia), over a 50‐year period using empirically derived population parameters collected from 2009 to 2015 on the Balcones Canyonlands Preserve (BCP), Travis County, Texas, USA. Assuming the extent and quality of habitat within the BCP does not change, the population remained stable with a population size of approximately 1,800 males, adult survival of 0.57, seasonal productivity of 1.32 male fledglings/territory, and assumed juvenile survival of 0.40. Population viability, however, was sensitive to changes in vital rates. The population declined toward local extinction when vital rates were at the low end of rates considered (0.47 adult survival, 1.14 male fledglings/territory, 0.28 juvenile survival), but had little to no probability of local extinction when vital rates were at the upper end (0.67 adult survival, 1.50 male fledglings/territory, 0.44 juvenile survival). Obtaining accurate estimates of juvenile survival remains problematic, but if juvenile survival is as low as previously reported elsewhere (0.28), the stability observed during the years of our study could be due to immigration of individuals displaced by habitat loss in the surrounding landscape. Increased carrying capacity, which served as a proxy for increased habitat quality within the BCP, was insufficient to sustain the population when productivity was low, illustrating the need for adequate seasonal productivity. Consistent with previous studies, our findings underscore the importance of managing for high‐quality breeding habitat and maintaining connectivity with other large habitat patches to promote the long‐term viability of the species. We suggest monitoring survival and productivity of high‐concern species may be justified because assessment of status from abundance alone can be confounded by immigration and other factors.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationReidy, Jennifer L.; Thompson, Frank R.; O'Donnell, Lisa. 2020. Population Viability of Golden‐cheeked Warblers in an Urbanizing Landscape. Wildlife Society Bulletin. 44(3): 502-511. https://doi.org/10.1002/wsb.1112.
Keywordsadult survival, central Texas, endangered species, golden‐cheeked warbler, juniper–oak woodland, juvenile survival, population viability, productivity, PVA, Setophaga chrysoparia
- Demographic rates of Golden-cheeked Warblers in an urbanizing woodland preserve
- Seasonal productivity and nest survival of Golden-cheeked Warblers vary with forest type and edge density
- Landscape and local effects on occupancy and densities of an endangered wood-warbler in an urbanizing landscape
XML: View XML