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  Home > People > Directory > Personnel Biographies
Picture of Researcher

Charlie Halpern

Phone: (206) 543-2789
Primary Email:

School of Environmental and Forest Sciences, University of Washington, Box 352100
Seattle, WA 98195-2100

Link to Personal Web Page

Official position at address above: Research Professor
Educational Institutions attended: B.S., Cornell University, 1980
Ph.D., Oregon State University, 1987
Roles/Affiliations: H. J. Andrews LTER
Principal Collaborators: Mark Harmon, Jerry Franklin, Kari O'Connell, Fred Swanson, Howard Bruner
General Interests: Forest understory dynamics, plant succession, plant diversity, montane/subalpine meadow ecology
Current Research Projects/Activities: Long-term studies of plant succession in Douglas-fir forests
Effects of forest management on plant community composition and diversity
Vegetation response to green-tree retention harvest
Role of plant competition during early secondary succession
Composition, structure, and dynamics of montane/subalpine meadows
Restoration of dry, montane meadows through prescribed fire and vegetation/fuels management
Temporal variation in understory plant communities


Celis, Jessica; Halpern, Charles B.; Jones, F. Andrew. 2017. Intraspecific trait variation and the differential decline of meadow species during conifer encroachment. Plant Ecology. pp. 1-14. doi: 10.1007/s11258-017-0712-3 (Pub No: 4968)
Halpern, Charles B.; Antos, Joseph A.; McKenzie, Donald; Olson, Annette M. 2016. Past tree influence and prescribed fire mediate biotic interactions and community reassembly in a grassland-restoration experiment. Journal of Applied Ecology. 53: 264–273. doi: 10.1111/1365-2664.12570 (Pub No: 4920)
Harmon, M.E.; Fasth, B.; Halpern, C.B.; Lutz, J.A. 2015. Uncertainty analysis: An evaluation metric for synthesis science. Ecosphere. 6(4):art63; 12p. doi: 10.1890/ES14-00235.1 (Pub No: 4909)
Halpern, C. B.; Antos, J. A.; Beckman, L. M. 2014. Vegetation Recovery in Slash-Pile Scars Following Conifer Removal in a Grassland-Restoration Experiment. Restoration Ecology. 22(6):731–740. doi: 10.1111/rec.12130 (Pub No: 4873)
Kremer, N. J., C. B. Halpern, J. A. Antos. 2014. Conifer reinvasion of montane meadows following experimental tree removal and prescribed burning. Forest Ecology and Management 319:128-137. DOI: 10.1016/j.foreco.2014.02.002 (Pub No: 4850)
Case, Madelon F.; Halpern, Charles B.; Levin, Simon A. 2013. Contributions of gopher mound and casting disturbances to plant community structure in a Cascade Range meadow complex. Botany 91: 555–561. doi:10.1139/cjb-2013-0023. (Pub No: 4794)
Halpern, C.B., and J.A. Lutz. 2013. Canopy closure exerts weak controls on understory dynamics: A 30-year study of overstory-understory interactions. Ecological Monographs 83:221-237. (Pub No: 4786)
Halpern, Charles B., Haugo, Ryan D.; Antos, Joseph A.; Kaas, Sheena S.; Kilanowski, Allyssa L. 2012. Grassland restoration with and without fire: evidence from a tree-removal experiment. Ecological Applications 22:425–441. http://dx.doi.org/10.1890/11-1061.1 (Pub No: 4681)
Rice, Janine. M.; Halpern, Charles. B.; Antos, Joseph. A.; Jones, Julia. A. 2012. Spatio-temporal patterns of tree establishment are indicative of biotic interactions during early invasion of a montane meadow. Plant Ecology. 213: 555-568. (Pub No: 4710)
Haugo, Ryan D.; Halpern, Charles B.; Bakker, Jonathan D. 2011. Landscape context and long-term tree influences shape the dynamics of forest-meadow ecotones in mountain ecosystems. Ecosphere. 2(8): Art. 91, 1-24. (Pub No: 4680)
Jones, Chad C.; Halpern, Charles B.; Niederer, Jessica. 2008. Plant succession on gopher mounds in western Cascade meadows: consequences for species diversity and heterogeneity. American Midland Naturalist . 159: 275-286. (Pub No: 4251)
Haugo, Ryan D.; Halpern, Charles B. 2007. Vegetation responses to conifer encroachment in a western Cascade meadow: a chronosequence approach. Canadian Journal of Botany. 85: 285-298. (Pub No: 4193)
Lang, Nicole L.; Halpern, Charles B. 2007 . The soil seed bank of a montane meadow: consequences of conifer encroachment and implications for restoration. Canadian Journal of Botany. 85: 557-569. (Pub No: 4239)
Lutz, James A.; Halpern, Charles B. 2006. Tree mortality during early forest development: a long-term study of rates, causes, and consequences. Ecological Monographs. 76(2): 257-275. (Pub No: 4017)
Halpern, C. B., D. McKenzie, S. A. Evans, and D. A. Maguire. 2005. Early responses of forest understories to varying levels and patterns of green-tree retention. Ecological Applications 15:175-195. (Pub No: 50017)
Nelson, C. R., and C. B. Halpern. 2005. Edge-related responses of understory species to aggregated retention harvest in the Pacific Northwest. Ecological Applications 15:196-209. (Pub No: 50018)
Aubry, K.B., C.B. Halpern, and D.A. Maguire. 2004. Ecological effects of variable-retention harvests in the northwestern United States: the DEMO study. Forest Snow and Landscape Research 78:119-134. (Pub No: 50019)
Antos, Joseph A.; Halpern, Charles B.; Miller, Richard E.; Cromack, Kermit Jr.; Halaj, Melora G. 2003. Temporal and spatial changes in soil carbon and nitrogen after clearcutting and burning of an old-growth Douglas-fir forest. Res. Pap. PNW-RP-552. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 19 p. (Pub No: 2771)
Acker, S. A.; Halpern, C. B.; Harmon, M. E.; Dyrness, C. T. 2002. Trends in bole biomass accumulation, net primary production and tree mortality in Pseudotsuga menziesii forests of contrasting age. Tree Physiology. 22: 213-217. (Pub No: 2824)
Franklin, J. F.; Halpern, Charles B. Pacific Northwest Forests. In: Barbour, Michael G.; Billings, William Dwight, eds. North American terrestrial vegetation. Cambridge, UK: Cambridge University Press; 2000:123-159. (Pub No: 3553)
McKenzie, Donald; Halpern, Charles B. 1999. Modeling the distributions of shrub species in Pacific Northwest forests. Forest Ecology and Management. 114: 293-307. (Pub No: 2467)
Miller, Eric A.; Halpern, Charles B. 1998 . Effects of environment and grazing disturbance on tree establishment in meadows of the central Cascade Range, Oregon, USA. Journal of Vegetation Science. 9: 265-282. (Pub No: 2325)
Halpern, Charles B.; Antos, Joseph A.; Geyer, Melora A.; Olson, Annette M. 1997. Species replacement during early secondary succession: the abrupt decline of a winter annual. Ecology. 78(2): 621-631. (Pub No: 1890)
Halpern, Charles B.; Spies, Thomas A. 1995. Plant species diversity in natural and managed forests of the Pacific Northwest. Ecological Applications. 5(4): 913-934. (Pub No: 1526)
Halpern, Charles B.; Smith, Bradley G.; Franklin, Jerry F. 1991. Forest and meadow communities of the Three Sisters Biosphere Reserve. In: Ffolliott, Peter F.; Swank, Wayne T., eds. People and the temperate region: a summary of research in the United States Man and the Biosphere (MAB) Program. Washington, DC: MAB Program, U.S. Department of State: 3-6. (Pub No: 957)
Halpern, Charles B.; Frenzen, Peter M.; Means, Joseph E.; Franklin, Jerry F. 1990. Plant succession in areas of scorched and blown-down forest after the 1980 eruption of Mount St. Helens, Washington. Journal of Vegetation Science. 1: 181-194. (Pub No: 1015)
Halpern, Charles B. 1989. Early successional patterns of forest species: interactions of life history traits and disturbance. Ecology. 70(3): 704-720. (Pub No: 956)
Halpern, Charles B. 1988. Early successional pathways and the resistance and resilience of forest communities. Ecology. 69(6): 1703-1715. (Pub No: 764)

Personal Information:

Personal Interests: Music, photography, hiking.