Timothy B. Harrington, PhD

Treesearch Publications

• Robert A. Slesak, Scout Dahms-May, Timothy B. Harrington. 2026. Twenty-year response of Douglas-fir to logging debris manipulation and vegetation control at two sites with contrasting soil quality
• David H. Peter, Timothy B. Harrington. 2025. Whitebark pine communities in the Olympic Mountains: microclimates, physical and competitive environments, and effects of white pine blister rust
• David H. Peter, Timothy B. Harrington. 2023. Three-year effects of crown removal by clipping or burning on beargrass (Xerophyllum tenax) size and biomass
• David R. Carter, Robert A. Slesak, Timothy B. Harrington, Anthony W. D’Amato. 2022. Soil texture and other site-level factors differentially affect growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings in the western Pacific Northwest
• Robert A. Slesak, Timothy B. Harrington. 2022. Effects of logging-debris removal, vegetation control, and site quality on stand characteristics of coast Douglas-fir
• Timothy B. Harrington, David H. Peter, David D. Marshall, Dean S. DeBell. 2022. Ten-year Douglas-fir regeneration and stand productivity differ among contrasting silvicultural regimes in western Washington, USA
• Robert A. Slesak, Timothy B. Harrington, Anthony W. D’Amato, David H. Peter. 2022. Removal of invasive Scotch broom increases its negative effects on soil chemistry and plant communities
• Robert A. Slesak, Timothy B. Harrington, Anthony W. D'Amato, David R. Carter. 2021. Legacy effects of non-native Cytisus scoparius in glacial outwash soils: Potential impacts to forest soil productivity in western Washington
• Timothy B. Harrington, Patrick J. Minogue, Randall Sutton, Dave H. Peter, John I Blake. 2021. Initial plant community responses to hardwood control treatments in restoration of remnant longleaf pine (Pinus palustris) woodlands
• Timothy B. Harrington, Robert A. Slesak, James Dollins, Stephen H. Schoenholtz, Dave H. Peter. 2020. Logging-debris and vegetation-control treatments influence competitive relationships to limit 15-year productivity of coast Douglas-fir in western Washington and Oregon
• Timothy B. Harrington. 2020. Scotch broom (Cytisus scoparius) germination and growth responses to light: implications for logging debris retention after forest harvesting
• Timothy B. Harrington, Anthony W. D'Amato, Robert A. Slesak, David R. Carter. 2019. Comparative effects of soil resource availability on physiology and growth of Scotch broom (Cytisus scoparius) and Douglas-fir (Pseudotsuga menziesii) seedlings
• David R. Carter, Robert A. Slesak, Timothy B. Harrington, Anthony W. D’Amato. 2019. Effects of irrigation and phosphorus fertilization on physiology, growth, and nitrogen-accumulation of Scotch broom (Cytisus scoparius)
• Andrea Watts, Timothy B. Harrington, Dave H. Peter, Robert A. Slesak. 2019. Managing competing vegetation in Douglas-Fir plantations: The benefits of forest floor complexity
• Daniel G. DeBruler, Stephen H. Schoenholtz, Robert A. Slesak, Brian D. Strahm, Timothy B. Harrington. 2019. Soil phosphorus fractions vary with harvest intensity and vegetation control at two contrasting Douglas-fir sites in the Pacific northwest
• David R. Carter, Robert A. Slesak, Timothy B. Harrington, Dave H. Peter, Anthony W. D’Amato. 2019. Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities
• Timothy B. Harrington, Warren Devine. 2018. Performance of four planted conifer species within artificial canopy gaps in a Western Washington Douglas-fir forest
• Michael S. Murphy, Laurence R. Schimleck, Timothy B. Harrington, Richard F. Daniels. 2018. Two-year stem curvature and growth responses of three full-sibling families of loblolly pine to five root/stem form treatments
• Timothy B. Harrington, Dave H. Peter, Robert A. Slesak. 2018. Logging debris and herbicide treatments improve growing conditions for planted Douglas-fir on a droughty forest site invaded by Scotch broom
• Dave H. Peter, Timothy B. Harrington. 2018. Effects of forest harvesting, logging debris, and herbicides on the composition, diversity and assembly of a western Washington, USA plant community
• Dave H. Peter, Timothy B. Harrington, Mark Thompson. 2017. Effects of the light environment and stand history on beargrass (Xerophyllum tenax) morphology and demography
• Robert A. Slesak, Timothy B. Harrington, Dave H. Peter, Daniel G. DeBruler, Stephen H. Schoenholtz, Brian D. Strahm. 2016. Effects of intensive management practices on 10-year Douglas-fir growth, soil nutrient pools, and vegetation communities in the Pacific Northwest, USA
• Robert A. Slesak, Timothy B. Harrington, Anthony W. D′Amato. 2016. Invasive scotch broom alters soil chemical properties in Douglas-fir forests of the Pacific Northwest, USA
• Timothy B. Harrington, Thaddeus A. Harrington. 2016. Early density management of longleaf pine reduces susceptibility to ice storm damage
• Richard E. Miller, Timothy B. Harrington, Harry W. Anderson. 2016. Stand dynamics of Douglas-fir 20 years after precommercial thinning and nitrogen fertilization on a poor-quality site
• Randall Wilk, Timothy B. Harrington, Robert A. Gitzen, Chris C. Maguire. 2015. Forest-floor disturbance reduces chipmunk (Tamias spp.) abundance two years after variable-retention harvest of Pacific Northwestern forests
• Warren D. Devine, Timothy B. Harrington. 2015. Seedfall and seed viability within artificial canopy gaps in a western Washington douglas-fir forest
• Vanessa R. Lane, Robert P. Simmons, Kristina J. Brunjes, John Kilgo, Timothy B. Harrington, Richard F. Daniels, W. Mark Ford, Karl V. Miller. 2015. Effects of precommercial thinning and midstory control on avian and small mammal communities during longleaf pine Savanna restoration
• Timothy B. Harrington. 2014. Synthetic auxin herbicides control germinating scotch broom (Cytisus scoparius)
• Timothy B. Harrington, David H. Peter, Warren Devine. 2014. Two-year effects of aminopyralid on an invaded meadow in the Washington Cascades
• Timothy B. Harrington, Robert A. Slesak, Stephen H. Schoenholtz. 2013. Variation in logging debris cover influences competitor abundance, resource availability, and early growth of planted Douglas-fir
• Timothy B. Harrington, Karl Miller, Noreen Parks. 2013. Restoring a disappearing ecosystem: the longleaf pine savanna
• David H. Peter, Timothy B. Harrington. 2012. Relations of native and exotic species 5 years after clearcutting with and without herbicide and logging debris treatments
• Warren Devine, Paul W. Footen, Brian D. Strahm, Robert B. Harrison, Thomas A. Terry, Timothy B. Harrington. 2012. Nitrogen leaching following whole-tree and bole-only harvests on two contrasting Pacific Northwest sites
• Warren D. Devine, Timothy B. Harrington. 2011. Aboveground growth interactions of paired conifer seedlings in close proximity
• Robert A. Slesak, Stephen H. Schoenholtz, Timothy B. Harrington, Nathan A. Meehan. 2011. Initial response of soil carbon and nitrogen to harvest intensity and competing vegetation control in douglas-fir (Pseudotsuga menziesii) plantations of the Pacific Northwest
• Timothy B. Harrington. 2011. Overstory and understory relationships in longleaf pine plantations 14 years after thinning and woody control
• Robert A. Slesak, Stephen H. Schoenholtz, Timothy B. Harrington. 2011. Soil carbon and nutrient pools in Douglas-fir plantations 5 years after manipulating biomass and competing vegetation in the Pacific Nortwest
• Warren Devine, Timothy B. Harrington, Thomas A. Terry, Robert B. Harrison, Robert A. Slesak, David H. Peter, Constance A. Harrington, Carol J. Shilling, Stephen H. Schoenholtz. 2011. Five-year vegetation control effects on aboveground biomass and nitrogen content and allocation in Douglas-fir plantations on three contrasting sites
• Noreen Parks, Timothy B. Harrington, Warren Devine. 2010. Toward more diverse forests: helping trees "get along" in a new organization
• Robert A. Slesak, Stephen H. Schoenholtz, Timothy B. Harrington. 2010. Soil respiration and carbon responses to logging debris and competing vegetation
• Timothy B. Harrington. 2010. Manipulating stand structure of Douglas-fir plantations for wildlife habitat and wood production
• Timothy B. Harrington. 2009. Seed germination and seedling emergence of Scotch broom (Cytisus scoparius)
• Robert A. Slesak, Stephen H. Schoenholtz, Timothy B. Harrington, Brian D. Strahm. 2009. Dissolved carbon and nitrogen leaching following variable logging-debris retention and competing-vegetation control in Douglas-fir plantations of western Oregon and Washington
• Timothy B. Harrington, John C. Tappeiner. 2009. Long-term effects of tanoak competition on Douglas-fir stand development
• Timothy B. Harrington, Connie Harrington, Dean S. DeBell. 2009. Effects of planting spacing and site quality on 25-year growth and mortality relationships of Douglas-fir (Pseudotsuga menziesii var menziesii).
• Brian D. Strahm, Robert B. Harrison, Thomas A. Terry, Timothy B. Harrington, A.B. Adams, Paul W. Footen. 2009. Changes in dissolved organic matter with depth suggest the potential for postharvest organic matter retention to increase subsurface soil carbon pools.
• Warren Devine, Timothy B. Harrington. 2008. Belowground competition influences growth of natural regeneration in thinned Douglas-fir stands

• Oregon State University, Ph.D., Silviculture, 1989
• Oregon State University, M.S., Forest Ecology, 1982
• Louisiana State University, B.S., Botany, 1980