Pacific Northwest Research Station

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Publications and Presentations

STUDIES OF VEGETATION

Published Papers

Davis, N.; Maguire, D. 2005. Predicting understory light availability based on neighborhood height data derived from vertical point sampling in mature Douglas-fir forests in the western Cascades. In: Peterson, C.E.; Maguire, D.A., eds. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. Gen. Tech. Rep. PNW-GTR-635. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 348.

Dovciak, M.; Halpern, C.; Saracco, J.; Evans, S.; Ligouri. 2006. Persistence of ground-layer bryophytes in a structural-retention experiment: initial effects of level and pattern of retention. Canadian Journal of Forest Research. 36: 3039-3052.

Evans, S.; Halpern, C.; McKenzie, D. In press. The contributions of forest structure and substrate to bryophyte diversity and abundance in mature coniferous forests of the Pacific Northwest. The Bryologist.

Halpern, C.; Spies, T. 1995. Plant species diversity in natural and managed forests of the Pacific Northwest. Ecological Applications. 5: 914-934.

Halpern, C.; Evans, S.; Nelson, C.; McKenzie, D.; Ligouri, D.; Hibbs, D.; Halaj, J. 1999. Response of forest vegetation to varying levels and patterns of green-tree retention: an overview of a long-term experiment. Northwest Science. 73(Special Issue): 27-44.

Halpern, C.; Raphael, M. 1999. Preface. In: Retention harvests in Northwestern forest ecosystems: the Demonstration of Ecosystem Management Options study. Northwest Science. 73(Special Issue): 1-2.

Halpern, C.; McKenzie, D. 2001. Disturbance and post-harvest ground conditions in a structural retention experiment. Forest Ecology and Management. 154: 215-225.

Halpern, C.; McKenzie, D.; Evans, S.; Maguire, D. 2005. Initial responses of forest understories to varying levels and patterns of green-tree retention. Ecological Applications. 15: 175-195.

Halpern, C.; McKenzie, D.; Evans, S.; Saracco, J.; Maguire, D.; Halaj, J. 2005. Vegetation responses to varying levels and patterns of overstory retention: early results of the DEMO experiment. In: Peterson, C.E.; Maguire, D.A.; eds. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. Gen. Tech. Rep. PNW-GTR-635. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 357-359.

Maguire, D.; Halpern, C.; Phillips, D. 2007. Changes in forest structure following variable-retention harvests: target and non-target effects. Forest Ecology and Management. 242: 708-726.

Maguire, D.; Mainwaring, D.; Halpern, C. 2005. Stand dynamics after variable-retention harvesting in mature Douglas-fir forests of western North America. [Abstract] Proceedings of the 22nd IUFRO world congress, Forests in the balance: linking tradition and technology. International Forestry Review. 7(5): 47.

Maguire, D., Mainwaring, D.; Halpern, C. 2006. Stand dynamics after variable-retention harvesting in mature Douglas-fir forests of western North America. Allgemeine Forst und Jagdzeitung. 177(6/7): 120-131. [Special Issue].

McKenzie, D.; Halpern, C.; Nelson, C. 2000. Overstory influences on herb and shrub communities in mature forests of western Washington, USA. Canadian Journal of Forest Research. 30: 1655-1666.

Michel, A.;, Winter S. 2009. Tree microhabitat structures as indicators of biodiversity in Douglas-fir forests of different stand ages and management histories in the Pacific Northwest, U.S.A. Forest Ecology and Management. 257: 1453-1464.

Moore, J.; Maguire, D.; Phillips, D.; Halpern, C. 2002. Effects of varying levels and patterns of green-tree retention on amount of harvesting damage. Western Journal of Applied Forestry. 17: 202-206.

Moore, J.; Mitchell, S.; Maguire, D.; Quine, C. 2003. Wind damage in alternative silvicultural systems: review and synthesis of previous studies. In: Ruck, B.; Kottmeier, C.; Mattheck, C.; Quine, C.; Willhelm, G., eds. Proceedings of the international conference Wind Effects on Trees. Karlsruhe, Germany: University of Karlsruhe, Karlsruhe: 191-198.

Nelson, C.; Halpern, C. 2005. Edge-related responses of understory species to aggregated retention harvest in the Pacific Northwest. Ecological Applications. 15: 196-209.

Nelson, C.; Halpern, C. 2005. Short-term effects of timber harvest and forest edges on ground-layer mosses and liverworts. Canadian Journal of Botany. 83: 610-620.

Nelson, C.; Halpern, C. 2005. Short-term responses of vascular plants and bryophytes in forest patches retained during structural retention harvests. In: Peterson, C.; Maguire, D., eds. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. Gen. Tech. Rep. PNW-GTR-635. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 366-368.

Nelson, C.; Halpern, C.; Antos, J. 2007. Variation in responses of late-seral herbs to disturbance and environmental stress. Ecology. 88: 2880-2890.

Pipp, A.; Henderson, C.; Callaway, R. 2001. Effects of forest age and forest structure on epiphytic lichen biomass and diversity in a Douglas-fir forest. Northwest Science. 75: 12-24.

Schwarz, P.; Maguire, D.; Mainwaring, D. 2005. Projections of future overstory stand structure and composition following variable-retention harvests in the Northwestern United States. In: Peterson, C.; Maguire, D., eds. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. Gen. Tech. Rep. PNW-GTR-635. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 211-214.

Winter, L.; Brubaker, L.; DeWitt, D.; Franklin, J.; Miller, E. 2002. Initiation of an old-growth Douglas-fir stand in the Pacific Northwest: a reconstruction from tree-ring records. Canadian Journal of Forest Research. 32: 1039-1056.

Zenner, E. 2000. Do residual trees increase structural complexity in Pacific Northwest coniferous forests? Ecological Applications. 10: 800-810.

Zenner, E. 2005. Development of tree size distributions in Douglas-fir forests under differing disturbance regimes. Ecological Applications. 15: 701-714.

Zenner, E.; Hibbs, D. 2000. A new method for modeling the heterogeneity of forest structure. Forest Ecology and Management. 129: 75-87.

Theses/Dissertations

Kalil, B. 2001. Do green-tree retention patches provide protection from timber harvest for forest floor bryophytes? Results from a study in Pacific Northwest Douglas-fir forests. Seattle, WA: University of Washington. Department of Botany. 27 p. Senior thesis.

Keyes, C. 2002. Recruitment of ponderosa pine seedlings beneath partial overstories. Corvallis, OR: Oregon State University. 195 p. Ph.D. dissertation.

Lam, T. Y. 2010. Exploration of statistical methods for synthesizing the effects of variable-retention harvesting on multiple taxa. Corvallis, OR:Oregon State University. 262 p. Ph.D. dissertation.

Nelson, C. 2004. Effects of timber harvest and forest edges on abundance, viability, and physiology of understory plants in Pseudotsuga forests of western Washington. Seattle, WA: University of Washington. 97 p. Ph.D. dissertation.

Pipp, A. 1998. Effects of forest age versus forest structure on epiphytic lichen biomass and diversity. Missoula, MT: University of Montana. 82 p. M.S. thesis.

Winter, L. 2000. Five centuries of structural development in an old-growth Douglas-fir stand in the Pacific Northwest: a reconstruction from tree-ring records. Seattle, WA: University of Washington. 132 p. Ph.D. dissertation.

Zenner, E. 1998. A new index for describing the structural complexity of forests. Corvallis, OR: Oregon State University. Ph.D. dissertation.

Presentations/Posters

Dovciak, M.; Halpern, C.; Evans, S.; Heithecker, T. 2010. Forest management changes microclimate and bryophyte communities in the Cascade Mountains of western Washington. 95th Annual Meeting of the Ecological Society of America, Pittsburg, PA.

Dovciak, M.; Halpern, C.; Evans, S.; Heithecker, T. 2010. Forest management changes microclimate and bryophyte communities in the Cascade Mountains of western Washington. International Conference on Global Change and the World's Mountains, Perth, Scotland.

Evans, S.; Nelson, C.; Saracco, J.; Dovciak, M.; Halpern, C. 2006. Persistence of forest-floor bryophytes in a structural-retention experiment: effects of level and pattern of overstory retention. American Bryological and Lichenological Society Annual Meeting, Chico, CA.

Halpern, C.; Evans, S.; Nelson, C.; McKenzie, D. 1997. Response of forest understory communities to green-tree retention harvest: the DEMO study. 11^th annual meeting of the Society for Conservation Biology, Victoria, BC, Canada.

Halpern, C.; McKenzie, D. 1999. Understory response to green-tree retention: a long-term experiment in the Pacific Northwest. Second North American forest ecology workshop, June 1999, Orono, ME.

Halpern, C.; McKenzie, D.; Evans, S.; Saracco, J.; Maguire, D.; Halaj, J. 2004. Vegetation responses to varying levels and patterns of overstory retention: early results of the DEMO experiment. 89^th annual meeting of the Ecological Society of America, Portland, OR.

Halpern, C. B., M. Dovciak, C. R. Nelson, and S. A. Evans. 2008. Responses of vascular and non-vascular plants to structural-retention harvests in the Pacific Northwest. 93rd Annual Meeting of the Ecological Society of America, Milwaukee, WI.

Maguire, D.; Mainwaring, D.; Halpern, C. 2005. Stand dynamics after variable-retention harvesting in mature Douglas-fir forests of western North America. 22nd IUFRO world congress, Forests in the balance: linking tradition and technology. Brisbane, Australia.

McKenzie, D.; Halpern, C.; Nelson, C. 1999. Overstory/understory relationships in Pacific Northwest forests: predicting mean and maximum response. Annual meeting of the Northwest Scientific Association, Tacoma, WA.

McKenzie, D.; Halpern, C.; Nelson, C. 1999. Overstory/understory relationships in Pacific Northwest forests: predicting mean and maximum response. 84^th Annual meeting of the Ecological Society of America, Spokane, WA.

McKenzie, D.; Halpern, C. 2000. Late-seral herbs and forest management: Can we fool Mother Nature? 14^th Annual meeting of the Society for Conservation Biology, Missoula, MT.

Moore, J. 2003. Wind damage in alternative silvicultural systems: review and synthesis of previous studies. International conference on Wind Effects on Trees. University of Karlsruhe, Germany.

Nelson, C. 2002. Influence of forest edges on vegetation: a synthesis of three decades of research in temperate ecosystems. 87^th annual meeting of the Ecological Society of America, Tucson, AZ.

Nelson, C. 2004. Postharvest demographic trends and physiological acclimation of late-seral forest herbs in the Washington Cascade Mountains. 89^th annual meeting of the Ecological Society of America, Portland, OR.

Nelson, C.; Halpern, C. 1999. The consequences of aggregated canopy retention for understory herbs in Pacific Northwest forests. 84^th annual meeting of the Ecological Society of America, Spokane, WA.

Nelson, C.; Halpern, C. 2001. Vegetation responses along edge-to-interior gradients within green-tree retention patches in Douglas-fir forests. 86^th annual meeting of the Ecological Society of America, Madison, WI.

Nelson, C.; Halpern, C. Halpern. 2004. Short-term effects of timber harvest and forest edges on ground-layer bryophytes in the Pacific Northwestern United States. 18^th annual meeting of the Society for Conservation Biology, New York, NY.

Nelson, C.; Halpern, C. 2010. Do forest fragments retained during timber harvest provide refugia for late-seral herbs and bryophytes? 24th International Congress for Conservation Biology, Edmonton, Alberta, Canada.