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Spatial patterns in occupancy and reproduction of Golden Eagles during drought: Prospects for conservation in changing environments
- Source :
- The Condor. 120:106-124
- Publication Year :
- 2018
- Publisher :
- Oxford University Press (OUP), 2018.
-
Abstract
- We used a broad-scale sampling design to investigate spatial patterns in occupancy and breeding success of territorial pairs of Golden Eagles (Aquila chrysaetos) in the Diablo Range, California, USA, during a period of exceptional drought (2014–2016). We surveyed 138 randomly selected sample sites over 4 occasions each year and identified 199 pairs of eagles, 100 of which were detected in focal sample sites. We then used dynamic multistate modeling to identify relationships between site occupancy and reproduction of Golden Eagles relative to spatial variability in landscape composition and drought conditions. We observed little variability among years in site occupancy (3-yr mean = 0.74), but the estimated annual probability of successful reproduction was relatively low during the study period and declined from 0.39 (± 0.08 SE) to 0.18 (± 0.07 SE). Probabilities of site occupancy and reproduction were substantially greater at sample sites that were occupied by successful breeders in the previous ...
- Subjects :
- 0106 biological sciences
Occupancy
Ecology
Range (biology)
media_common.quotation_subject
010603 evolutionary biology
01 natural sciences
010605 ornithology
Geography
Site occupancy
Sampling design
Spatial ecology
Animal Science and Zoology
Spatial variability
Reproduction
Ecology, Evolution, Behavior and Systematics
media_common
Subjects
Details
- ISSN :
- 19385129 and 00105422
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- The Condor
- Accession number :
- edsair.doi...........03452c402ca56ed15c05db9757f2ecc2