Ecology of Rare and Declining Species and Communities of Conservation Concern

Effects of Management on Wildlife and Habitats

Habitat Mapping and Modeling

Hagar, J.C., Manning, T., Barnett, J., 2013, Survey of Bats on the Mid-Columbia River National Wildlife Refuge Complex and Little Pend Oreille National Wildlife Refuge, December 2011 - April 2012: U.S. Geological Survey Open-File Report 2013-1120, p. 30. [Details]

Jenkins, S.R., Betts, M.G., Huso, M.M., Hagar, J.C., 2013, Habitat selection by juvenile Swainson’s thrushes (Catharus ustulatus) in headwater riparian areas, northwestern Oregon, USA, http-//dx.doi.org/10.1016/j.foreco.2013.04.041: Forest Ecology and Management, v. 305, p. online. [Details]

Eskelson, B.N., Temesgen, H., Hagar, J.C., 2012, A comparison of selected parametric and imputation methods for estimating snag density and snag quality attributes: Forest Ecology and Management, v. 272, p. 26-34. [Details]

Hagar, J.C., Li, J., Sobota, J., Jenkins, S.R., 2012, Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range: Forest Ecology and Management, v. 285, p. 213-226. [Details]

Hagar, J.C., 2012, Summary of Bird-Survey and Banding Results at W.L. Finley National Wildlife Refuge, 1998-2008: U.S. Geological Survey Open-File Report 2012-1223, p. 12. [Details]

Manning, T., Hagar, J.C., McComb, B.C., 2012, Thinning of young Douglas-fir forests decreases density of northern flying squirrels in the Oregon Cascades: Forest Ecology and Management, v. 264, p. 115-124. [Details]

Eskelson, B.N., Anderson, P.D., Hagar, J.C., Temesgen, H., 2011, Geostatistical modeling of riparian forest microclimate and its implications for sampling: Canadian Journal of Forest Research, v. 41, no. 5, p. 974-985. [Details]

Eskelson, B.N., Madsen, L., Hagar, J.C., Temesgen, H., 2011, Estimating riparian understory vegetation cover with beta regression and copula models: Forest Science, v. 57, no. 3, p. 212-221. [Details]

Hagar, J.C., 2011, Partial Harvesting can Enhance Foraging Habitat for Birds Associated with Understory Vegetation in Western Oregon Forests: USDI Fish and Wildlife Service Biological Technical Publication, FWS/ BTP-R1014- 2011, p. 38-42. [Details]

Hagar, J.C., 2011, Oregon Songbirds- Singing for Their Supper in Evergreen Forests, Episode 16 (8.1 MB) USGS Oregon Science Podcast, Portland, OR. In this episode we sit down with USGS wildlife biologist Joan Hagar and discuss her recent study on songbirds in the Pacific Northwest. New research indicates a possible relationship between reductions in the abundance of some species of songbird and reductions in the amount of deciduous trees in evergreen forests. Join us, as we demonstrate how Oregon songbirds sing for their supper in evergreen-dominated forests. [Details]