Cooperative Fish and Wildlife Research Units Program:
Education, Research and Technical Assistance for Managing Our Natural Resources

Staff Member

Dr. Steven Harry Ackers

Senior Faculty Research Assistant 1
Phone: (541) 852 - 8055
Email: ackerss@onid.orst.edu

Research Publications Publication Date
Rockweit, JT, JM Jenkins, JE Hines, JD Nichols, KM Dugger, AB Franklin, PC Carlson, WL Kendall, DB Lesmeister, C McCafferty, SH Ackers, LS Andrews, LL Bailey, JB, KP Burnham, T Chestnut, MM Conner, KE Dilione, RJ Davis, ED Forsman, EM Glenn, SA Gremel, KA Hamm, DR Herter, JM Higley, RB Horn, DW Lamphear, TL McDonald, JA Reid, CJ Schwarz, DC Simon, SG Sovern, JK Swingle, JD Wiens, H Wise, and CB Yackulic. 2022. Range-wide Sources of Variation in Reproductive Rates of Northern Spotted Owls. Ecological Applications 000:000-000, doi:10.1002/eap.2726. August 2022
Jenkins, JMA, DB. Lesmeister, ED Forsman, KM Dugger, SH Ackers, LS Andrews, CE McCafferty, MS Pruett, JA Reid, SG Sovern, RB Horn, SA Gremel, JD Wiens, and Z Yang. 2019. Social status, forest disturbance, and barred owls shape long-term trends in breeding dispersal distance of Northern Spotted Owls. The Condor 121:1–17, DOI: 10.1093/condor/duz055 December 2019
Dugger, Katie M., Alan B. Franklin, Damon B. Lesmeister, Raymond J. Davis, J. David Wiens, Gary C. White, James D. Nichols, James E. Hines, Charles B. Yackulic, Carl J. Schwarz, Steven H. Ackers, L. Steven Andrews, Larissa L. Bailey, Robin Bown, Jesse Burgher, Kenneth P. Burnham, Peter C. Carlson, Tara Chestnut, Mary M. Conner, Krista E. Dilione, Eric D. Forsman, Scott A. Gremel, Keith A. Hamm, Dale R. Herter, J. Mark Higley, Rob B. Horn, Julianna M. Jenkins, William L. Kendall, David W. Lamphear, Christopher McCafferty, Trent L. McDonald, Janice A. Reid, Jeremy T. Rockweit, David C. Simon, Stan G. Sovern, James K. Swingle, and Heather Wise. 2021. Estimating northern spotted owl pair detection probabilities based on call-back surveys associated with long-term mark-recapture studies. USGS Open Source Report. July 2023
Dugger, K. M., E. D. Forsman, A. B. Franklin, R. J. Davis, G. C. White, C. J. Schwarz, K. P. Burnham, J. D. Nichols, J. E. Hines, C. B. Yackulic, P. F. Doherty, Jr., L. Bailey, D. A. Clark, S. H. Ackers, L. S. Andrews, B. Augustine, B. L. Biswell, J. Blakesley, P. C. Carlson, Matthew J. Clement, L. V. Diller, E. M. Glenn, A. Green, S. A. Gremel, D. R. Herter, J. M. Higley, J. Hobson, R. B. Horn, K. P. Huyvaert, C. McCafferty, T. McDonald, K. McDonnell, G. S. Olson, J. A. Reid, J. Rockweit, V. Ruiz, J. Saenz, S. G. Sovern. 2016. The effects of habitat, climate and Barred Owls on long-term demography of Northern Spotted Owls. The Condor: Ornithological Applications Volume 118:57–116, DOI: 10.1650/CONDOR-15-24.1 February 2016
A.B. Franklin, K.M. Dugger, D.B. Lesmeister, R.J. Davis, J.D. Wiens, G.C. White, J.D. Nichols, J.E. Hines, C.B. Yackulic, C.J. Schwarz, S.H. Ackers, L.S. Andrews, L.L. Bailey, R. Bown, J. Burgher, K.P. Burnham, P.C. Carlson, T. Chestnut, M.M. Conner, K.E. Dilione, E.D. Forsman, E.M. Glenn, S.A. Gremel, K.A. Hamm, D.R. Herter, J.M. Higley, Rob B. Horn, J.M. Jenkins, W.L. Kendall, D.W. Lamphear, C. McCafferty, T.L. McDonald, J.A. Reid, J.T. Rockweit, D.C. Simon, S.G. Sovern, J.K. Swingle, and H. Wise. 2021. Range-wide declines of Northern Spotted Owls populations in the Pacific Northwest: a meta-analysis. Biological Conservation Volume 259, DOI: 10.1016/j.biocon.2021.109168. May 2021
Project Completion Date
The demography of Northern Spotted Owls in Oregon and Washington June 2024
Presentations Presentation Date
Dugger, K.M., E.D. Forsman, D.A. Clark, R.J. Davis and 33 others. 2014. Status and trends of the Northern Spotted Owl (strix occidentalis caurina): results of a range-wide meta-analysis. 2014 Joint Annual Meeting of American Ornithologist's Union, Cooper Ornithological Society, and Society of Canadian Ornithologists, September 22-28, 2014, Estes Park, CO. September 2014
Ackers, S.H., R.J. Davis, and K.M. Dugger. 2014. EVALUATION OF NORTHERN SPOTTED OWL (STRIX OCCIDENTALIS CAURINA) HABITAT MODELS USING LIDAR-BASED VEGETATION MEASUREMENTS AND LANDSAT-IMPUTED FOREST STAND CHARACTERISTICS. Oregon TWS Annual Meeting, February 5-7, 2014, Bend OR. February 2014
Technical Publications Publication Date
Dugger, KM, S Ackers, et al. 2022. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. Annual Progress Report, 68pp. | Download December 2022
Dugger, KM, S Ackers, et al. 2021. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. Annual Progress Report, 68pp. | Download December 2021
Dugger, KM, S Ackers, et al. 2020. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. Annual Progress Report, 66pp. December 2020
Dugger, KM, S Ackers, et al. 2019. The Demography of Northern Spotted Owls (Strix occidentalis caurina) on the Willamette National Forest, Oregon. Oregon Cooperative Fish and Wildlife Research Unit (OCFWRU), Department of Fisheries and Wildlife, Oregon State University, Corvallis, Oregon. Annual Progress Report, 66pp. December 2019