Affiliation:
1. Institute for Wildlife Studies, San Diego, California, USA
Abstract
Abstract
The San Clemente Bell’s Sparrow (Artemisiospiza belli clementeae) is a federally threatened subspecies endemic to San Clemente Island, California. Previous research suggested dependence on boxthorn (Lycium californicum) as breeding habitat and nesting substrate; however, this conclusion was based on data collected when introduced feral ungulates had severely degraded the soil and vegetation cover. Since removal of the ungulates, native vegetation has gradually increased and the San Clemente Bell’s Sparrows have expanded into areas where habitat had been unsuitable. To explore how Bell’s Sparrows use these areas, we examined reproductive metrics associated with habitat covariates gathered at 214 nest sites used by Bell’s Sparrows from 2014 to 2016. We found that nest success in boxthorn habitat, previously considered an essential habitat for Bell’s Sparrow nesting, was similar to success in alternative habitat types. Our findings contradict previous conclusions that Bell’s Sparrows were boxthorn-dependent. We believe this previously documented relationship was likely due to the lack of available alternative nesting habitat following years of feral ungulate degradation, and Bell’s Sparrows now reproduce in multiple habitat types and throughout most of San Clemente Island. Furthermore, our findings illustrate the importance of long-term monitoring and corresponding adaptive management when monitoring species in changing and recovering landscapes.
Funder
U.S. Army Corps of Engineers
Commander Pacific Fleet
Publisher
Oxford University Press (OUP)
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference71 articles.
1. Viability of Bell’s Sage Sparrow (Amphispiza belli ssp. belli) under altered fire regimes;Akçakaya;Ecological Applications,2005
2. Accounting for fitness: Combining survival and selection when assessing wildlife–habitat relationships;Aldridge;Israel Journal of Ecology and Evolution,2008
3. Uninformative parameters and model selection using Akaike’s Information Criterion;Arnold;The Journal of Wildlife Management,2010
4. Home range size and carrying capacity of the South Island Takahe (Porphyrio hochstetteri) on Tiritiri Matagani Island;Baber;Notornis,2003
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