Predicting patch occupancy in fragmented landscapes at the rangewide scale for an endangered species: an example of an American warbler
AuthorsCollier, Bret A.
Groce, Julie E.
Morrison, Michael L.
Newnam, John C.
Campomizzi, Andrew J.
Farrell, Shannon L.
Mathewson, Heather A.
Snelgrove, Robert T.
Carroll, Raymond J.
Wilkins, Robert N.
KAUST Grant NumberKUS-C1-016-04
MetadataShow full item record
AbstractAIM: Our objective was to identify the distribution of the endangered golden-cheeked warbler (Setophaga chrysoparia) in fragmented oak-juniper woodlands by applying a geoadditive semiparametric occupancy model to better assist decision-makers in identifying suitable habitat across the species breeding range on which conservation or mitigation activities can be focused and thus prioritize management and conservation planning. LOCATION: Texas, USA. METHODS: We used repeated double-observer detection/non-detection surveys of randomly selected (n = 287) patches of potential habitat to evaluate warbler patch-scale presence across the species breeding range. We used a geoadditive semiparametric occupancy model with remotely sensed habitat metrics (patch size and landscape composition) to predict patch-scale occupancy of golden-cheeked warblers in the fragmented oak-juniper woodlands of central Texas, USA. RESULTS: Our spatially explicit model indicated that golden-cheeked warbler patch occupancy declined from south to north within the breeding range concomitant with reductions in the availability of large habitat patches. We found that 59% of woodland patches, primarily in the northern and central portions of the warbler's range, were predicted to have occupancy probabilities ≤0.10 with only 3% of patches predicted to have occupancy probabilities >0.90. Our model exhibited high prediction accuracy (area under curve = 0.91) when validated using independently collected warbler occurrence data. MAIN CONCLUSIONS: We have identified a distinct spatial occurrence gradient for golden-cheeked warblers as well as a relationship between two measurable landscape characteristics. Because habitat-occupancy relationships were key drivers of our model, our results can be used to identify potential areas where conservation actions supporting habitat mitigation can occur and identify areas where conservation of future potential habitat is possible. Additionally, our results can be used to focus resources on maintenance and creation of patches that are more likely to harbour viable local warbler populations.
CitationCollier BA, Groce JE, Morrison ML, Newnam JC, Campomizzi AJ, et al. (2011) Predicting patch occupancy in fragmented landscapes at the rangewide scale for an endangered species: an example of an American warbler. Diversity and Distributions 18: 158–167. Available: http://dx.doi.org/10.1111/j.1472-4642.2011.00831.x.
SponsorsWe thank J. Andrew Royle, Marc Kery, Frank Thompson and two anonymous reviewers for constructive comments on earlier versions of this manuscript. We appreciate discussions with J. Andrew Royle, Ciprian Crainiceanu, Marc Kery and Marc Genton during model development. Support for our research was provided by Texas Department of Transportation. Additionally, we appreciate support from Texas Parks and Wildlife Department. B. A. Collier and R. J. Carroll acknowledge partial support for their work from Award No. KUS-C1-016-04, made by the King Abdullah University of Science and Technology (KAUST). We gratefully acknowledge the private landowners who allowed us access to their lands during the course of this project as well as managers of public lands surveyed during this study.
JournalDiversity and Distributions
PubMed Central IDPMC3298116
CollectionsPublications Acknowledging KAUST Support
- Responses of a Federally Endangered Songbird to Understory Thinning in Oak-Juniper Woodlands.
- Authors: Long AM, Marshall ME, Morrison ML, Hays KB, Farrell SL
- Issue date: 2017 Apr
- Quantifying the importance of patch-specific changes in habitat to metapopulation viability of an endangered songbird.
- Authors: Horne JS, Strickler KM, Alldredge M
- Issue date: 2011 Oct
- Conspecific cues and breeding habitat selection in an endangered woodland warbler.
- Authors: Farrell SL, Morrison ML, Campomizzi AJ, Wilkins RN
- Issue date: 2012 Sep
- Anthropogenic landscape change promotes asymmetric dispersal and limits regional patch occupancy in a spatially structured bird population.
- Authors: Pavlacky DC Jr, Possingham HP, Lowe AJ, Prentis PJ, Green DJ, Goldizen AW
- Issue date: 2012 Sep
- Habitat fragmentation and genetic diversity of an endangered, migratory songbird, the golden-cheeked warbler (Dendroica chrysoparia).
- Authors: Lindsay DL, Barr KR, Lance RF, Tweddale SA, Hayden TJ, Leberg PL
- Issue date: 2008 May