Search Results - "Hagar, Joan"

Incorporating LiDAR metrics into a structure-based habitat model for a canopy-dwelling species by Hagar, Joan C., Yost, Andrew, Haggerty, Patricia K.

“…The development of metrics derived from LiDAR to quantify structural attributes of forests has contributed to substantial advances in wildlife-habitat…”
Get full text

Herbicides and herbivory interact to drive plant community and crop-tree establishment by Stokely, Thomas D., Verschuyl, Jake, Hagar, Joan C., Betts, Matthew G.

“…Land management practices often directly alter vegetation structure and composition, but the degree to which ecological processes such as herbivory interact…”
Get full text

Response of corvid nest predators to thinning: implications for balancing short- and long-term goals for restoration of forest habitat by Hagar, Joan, Owen, Theodore, Stevens, Thomas, Waianuhea, Lorraine

“…Forest thinning on public lands in the Pacific Northwest USA is an important tool for restoring diversity in forest stands with a legacy of simplified…”
Get full text

Use of Created Snags by Cavity-Nesting Birds Across 25 Years by BARRY, AMY M., HAGAR, JOAN C., RIVERS, JAMES W.

“…Snags are important habitat features for many forest-dwelling species, so reductions in the number of snags can lead to the loss of biodiversity in forest…”
Get full text

Wildlife species associated with non-coniferous vegetation in Pacific Northwest conifer forests: A review by Hagar, Joan C.

“…Non-coniferous vegetation, including herbs, shrubs, and broad-leaved trees, makes a vital contribution to ecosystem function and diversity in Pacific Northwest…”
Get full text

Thinning of young Douglas-fir forests decreases density of northern flying squirrels in the Oregon Cascades by Manning, Tom, Hagar, Joan C., McComb, Brenda C.

“…► We compare flying squirrel densities in thinned and unthinned Douglas-fir forest. ► Thinning of 55–65 year-old Douglas-fir stands decreased flying squirrel…”
Get full text

Annual migratory movement, apparent molt-migration, migration schedule, and diffuse migratory connectivity of Hermit Warblers by Kim, Hankyu, Siegel, Rodney, Stephens, Jaime, Hagar, Joan, Furnas, Brett, Jeong, Min-Su, McComb, Brenda, Betts, Matthew

Get full text

Estimating Riparian Understory Vegetation Cover with Beta Regression and Copula Models by Eskelson, Bianca N.I, Madsen, Lisa, Hagar, Joan C, Temesgen, Hailemariam

“…Understory vegetation communities are critical components of forest ecosystems. As a result, the importance of modeling understory vegetation characteristics…”
Get full text

Arthropod prey for riparian associated birds in headwater forests of the Oregon Coast Range by Hagar, Joan C., Li, Judith, Sobota, Janel, Jenkins, Stephanie

“…► We examined sources of arthropod prey for bird species associated with riparian habitats in managed forests. ► Aquatic emergent insects represented a…”
Get full text

Use of Nonalpine Anthropogenic Habitats by American Pikas (Ochotona princeps) in Western Oregon by Manning, Tom, Hagar, Joan C.

“…The American pika (Ochotona princeps Richardson) has long been characterized in field guides and popular literature as an obligate inhabitant of alpine talus…”
Get full text

Habitat selection by juvenile Swainson’s thrushes (Catharus ustulatus) in headwater riparian areas, Northwestern Oregon, USA by Jenkins, Stephanie R., Betts, Matthew G., Huso, Manuela M., Hagar, Joan C.

“…•We examined habitat selection by juvenile Swainson’s thrushes using radio telemetry.•Headwater streams are selected by Swainson’s thrush during the…”
Get full text

The snag’s the limit: Habitat selection modeling for the western purple martin in a managed forest landscape by Sherman, Lorelle, Hagar, Joan

“…•Purple martins are uncommon but widely distributed in western Oregon.•Purple martin habitat is the presence of moderately decayed snags in early seral…”
Get full text

Management, Morphological, and Environmental Factors Influencing Douglas-Fir Bark Furrows in the Oregon Coast Range by Sheridan, Christopher D., Puettmann, Klaus J., Huso, Manuela M.P., Hagar, Joan C., Falk, Kristen R.

Get full text

ARTHROPOD PREY OF WILSON'S WARBLERS IN THE UNDERSTORY OF DOUGLAS-FIR FORESTS by Hagar, Joan C., Dugger, Katie M., Starkey, Edward E.

“…Availability of food resources is an important factor in avian habitat selection. Food resources for terrestrial birds often are closely related to vegetation…”
Get full text

Modeling Marbled Murrelet (Brachyramphus marmoratus) Habitat Using LiDAR-Derived Canopy Data by Joan C. Hagar, Bianca N. I. Eskelson, Patricia K. Haggerty, S. Kim Nelson, David G. Vesely

“…LiDAR (Light Detection And Ranging) is an emerging remote-sensing tool that can provide fine-scale data describing vertical complexity of vegetation relevant…”
Get full text

Level and pattern of overstory retention shape the abundance and long-term dynamics of natural and created snags by Halpern, Charles B., Rossman, Allison K., Hagar, Joan C.

“…•Pre-harvest variation in snag density persisted for two decades after harvest.•Level and pattern of retention had strong effects on snag carryover through…”
Get full text

Evaluating the role of active management in mature Douglas-fir (Pseudotsuga menziesii) stands for songbird conservation by Williams, Neil G., Hagar, Joan C., Powers, Matthew D.

“…•Relative abundance of old-forest associates highest in unmanaged and thinned stands.•Most species of songbird persisted across a broad range of overstory…”
Get full text

Influence of riparian buffer width on bird assemblages in western Oregon by Hagar, J.C

“…The goals of current management practices in riparian areas in the Pacific Northwest include protecting and maintaining habitat for terrestrial wildlife…”
Get full text

Long-term dynamics and characteristics of snags created for wildlife habitat by Barry, Amy M., Hagar, Joan C., Rivers, James W.

“…•Data are lacking on how intentionally created snags change over long timescales.•Most created Douglas-fir snags were standing after ≥25y.•Snags created in…”
Get full text

Removal of cattle grazing correlates with increases in vegetation productivity and in abundance of imperiled breeding birds by Poessel, Sharon A., Hagar, Joan C., Haggerty, Patricia K., Katzner, Todd E.

“…Livestock grazing is the most prevalent land use practice in the western United States and a widespread cause of degradation of riparian vegetation. Riparian…”
Get full text