دورية أكاديمية
The effects of habitat, climate, and Barred Owls on long-term demography of Northern Spotted Owls ; Condor
| العنوان: | The effects of habitat, climate, and Barred Owls on long-term demography of Northern Spotted Owls ; Condor |
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| المؤلفون: | Dugger, Katie M., Forsman, Eric D., Franklin, Alan B., Davis, Raymond J., White, Gary C., Schwarz, Carl J., Burnham, Kenneth P., Nichols, James D., Hines, James E., Yackulic, Charles B., Doherty, Paul F., Jr., Bailey, Larissa L., Clark, Darren A., Ackers, Steven H., Andrews, Lawrence S., Augustine, Ben C., Biswell, Brian L., Blakesley, Jennifer, Carlson, Peter C., Clement, Matthew J., Diller, Lowell V., Glenn, Elizabeth M., Green, Adam, Gremel, Scott A., Herter, Dale R., Higley, J. Mark, Hobson, Jeremy, Horn, Rob B., Huyvaert, Kathryn P., McCafferty, Christopher, McDonald, Trent, McDonnell, Kevin, Olson, Gail S., Reid, Janice A., Rockweit, Jeremy, Ruiz, Viviana, Saenz, Jessica, Sovern, Stan G. |
| المساهمون: | Fish and Wildlife Conservation |
| سنة النشر: | 2016 |
| المجموعة: | VTechWorks (VirginiaTech) |
| مصطلحات موضوعية: | Barred Owl, fecundity, Northern Spotted Owl, occupancy, population change, Strix occidentalis caurina, Strix varia, survival |
| الوصف: | Estimates of species' vital rates and an understanding of the factors affecting those parameters over time and space can provide crucial information for management and conservation. We used mark-recapture, reproductive output, and territory occupancy data collected during 1985-2013 to evaluate population processes of Northern Spotted Owls (Strix occidentalis caurina) in 11 study areas in Washington, Oregon, and northern California, USA. We estimated apparent survival, fecundity, recruitment, rate of population change, and local extinction and colonization rates, and investigated relationships between these parameters and the amount of suitable habitat, local and regional variation in meteorological conditions, and competition with Barred Owls (Strix varia). Data were analyzed for each area separately and in a meta-analysis of all areas combined, following a strict protocol for data collection, preparation, and analysis. We used mixed effects linear models for analyses of fecundity, Cormack-Jolly-Seber open population models for analyses of apparent annual survival (phi), and a reparameterization of the Jolly-Seber capture-recapture model (i.e. reverse Jolly-Seber; RJS) to estimate annual rates of population change (lambda(RJS)) and recruitment. We also modeled territory occupancy dynamics of Northern Spotted Owls and Barred Owls in each study area using 2-species occupancy models. Estimated mean annual rates of population change (lambda) suggested that Spotted Owl populations declined from 1.2% to 8.4% per year depending on the study area. The weighted mean estimate of lambda for all study areas was 0.962 (+/- 0.019 SE; 95% CI: 0.925-0.999), indicating an estimated range-wide decline of 3.8% per year from 1985 to 2013. Variation in recruitment rates across the range of the Spotted Owl was best explained by an interaction between total winter precipitation and mean minimum winter temperature. Thus, recruitment rates were highest when both total precipitation (29 cm) and minimum winter temperature (-9.5 degrees C) ... |
| نوع الوثيقة: | article in journal/newspaper still image |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0010-5422 1938-5129 |
| العلاقة: | http://hdl.handle.net/10919/97903Test; https://doi.org/10.1650/CONDOR-15-24.1Test; 118 |
| DOI: | 10.1650/CONDOR-15-24.1 |
| الإتاحة: | https://doi.org/10.1650/CONDOR-15-24.1Test http://hdl.handle.net/10919/97903Test |
| حقوق: | Creative Commons CC0 1.0 Universal Public Domain Dedication ; http://creativecommons.org/publicdomain/zero/1.0Test/ |
| رقم الانضمام: | edsbas.979DC989 |
| قاعدة البيانات: | BASE |
| تدمد: | 00105422 19385129 |
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| DOI: | 10.1650/CONDOR-15-24.1 |