Charlie Halpern Phone: (206) 543-2789 Primary Email: School of Environmental and Forest Sciences, University of Washington, Box 352100 Seattle, WA 98195-2100 USA

Link to Personal Web Page

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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

Study Areas

Core Areas	Primary Production Disturbance
Habitat	Forest
Organisms	Trees
Components	Biological Diversity --- Leader Vegetation --- Key Person

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Publications

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)

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Personal Information:

Personal Interests:

Music, photography, hiking.