Studies of Vegetation

Published Papers

Davis, N., and D. Maguire. 2005. Predicting understory light availability based on neighborhood height data derived from vertical point sampling in mature Douglas-fir forests in the western Cascades. Page 348 in C. E. Peterson and D. A. Maguire, editors. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. USDA Forest Service General Technical Report PNW-GTR-635.

Dovciak, M., C. B. Halpern, J. F. Saracco, S. A. Evans, and D. A. Liguori. 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.

Halpern, C. B., S. A. Evans, C. R Nelson, D. McKenzie, D. A. Liguori, D. E. Hibbs, and M. G. Halaj. 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. B., and M. G. Raphael.  1999.  Preface.  Special Issue on retention harvests in northwestern forest ecosystems:  The Demonstration of Ecosystem Management Options study.  Northwest Science 73 (Special Issue): 1-2.

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

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

Halpern. C., D. McKenzie, S. Evans, J. Saracco, D. Maguire, and J. Halaj. 2005. Vegetation responses to varying levels and patterns of overstory retention: early results of the DEMO experiment. Pages 357-359 in C. E. Peterson and D. A. Maguire, editors. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. USDA Forest Service General Technical Report PNW-GTR-635.

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

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

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

Moore, J. R., D. A. Maguire, D. L. Phillips, and C. B. Halpern.  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. R., S. J. Mitchell, D. A. Maguire, and C. P. Quine. 2003. Wind
damage in alternative silvicultural systems: review and synthesis of
previous studies. Pages 191-198 in B. Ruck, C. Kottmeier, C. Mattheck, C. Quine, and G. Wilhelm, editors. Proceedings of the International Conference
"Wind Effects on Trees".   

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.

Nelson, C. R., and C. B. Halpern. 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., and C. Halpern. 2005. Short-term responses of vascular plants and bryophytes in forest patches retained during structural retention harvests. Pages 366-368 in C. E. Peterson and D. A. Maguire, editors. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. USDA Forest Service General Technical Report PNW-GTR-635.

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

Pipp, A. K., C. Henderson, and R. M. Callaway.  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., D. A. Maguire, and D. Mainwaring. 2005. Projections of future overstory stand structure and composition following variable-retention harvests in the Northwestern United States. Pages 211-214 in C. E. Peterson and D. A. Maguire, editors. Balancing ecosystem values: innovative experiments for sustainable forestry. Proceedings of a conference. USDA Forest Service General Technical Report PNW-GTR-635.

Winter, L. E., L. B. Brubaker, D. Q. DeWitt, J. F. Franklin and E. A. Miller.  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. K. 2000.  Do residual trees increase structural complexity in Pacific Northwest coniferous forests? Ecological Applications 10:800-810.

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

Zenner, E. K., and D. E. Hibbs.  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.  Senior thesis (Department of Botany), University of Washington.  27 pp.

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

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

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

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.  Ph.D. dissertation.  University of Washington, Seattle, WA.  132 p.

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

Presentations/Posters

Evans, S. A., C. R. Nelson, J. F. Saracco, M. Dovciak, and C. B. Halpern. 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. B., S. A. Evans, C. R. Nelson, and D. McKenzie.  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, B.C., Canada.

Halpern, C. B.,  and D. McKenzie.  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. B., D. McKenzie, S. A. Evans, J. F. Saracco, D. A. Maguire, and J. Halaj. 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. A., D. B. Mainwaring, and C. B. Halpern. 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., C. B. Halpern, and C. R. Nelson.  1999.  Overstory/understory relationships in Pacific Northwest forests:  predicting mean and maximum response.  Annual Meeting of the Northwest Scientific Association,  Tacoma, WA.

McKenzie, D., C. B. Halpern, and C. R. Nelson.  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., and C. B. Halpern.  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. R. 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. R.  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. R. 2004. Post-harvest 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. R., and C. B. Halpern.  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. R., and C. B. Halpern.  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. R., and C. B. 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.