Malcolm P. North
1731 Research Park
Davis, CA 95618
Contact Malcolm P. North
My current research is focused on the effects of disturbance on the structure, composition and function of Sierra Nevada mixed-conifer ecosystems. Mixed-conifer and ponderosa pines forests have been seriously impacted by a century of fire suppression and selective logging. In many areas this has reduced the number of large, old trees and increase stem densities, particularly of shade-tolerant species such as white fir and incense cedar. Fire and in some cases thinning, will be needed to restore historic forest conditions, however, the effect of these two restoration methods on ecosystem structure and function has not been systematically compared. Disturbance alters a forest's scaffold initiating changes in vegetation pattern, composition, microclimate and edaphic conditions. These in turn affect fundamental ecosystem processes (respiration, decomposition, nutrient cycling), trophic structure (invertebrate and fungal based food chains) and wildlife habitat. While many of these processes are difficult to measure, they are often strongly linked to forest structure and composition. Establishing the linkage between ecosystem function and stand structure can provide forest managers with a surrogate measure of the impacts of their activities on ecosystem health.
In the future, I plan to explore carbon stocks and how carbon emissions may be reduced as the global climate changes.
My research has focused on the influence of forest structure, pattern and composition on ecosystem function and wildlife habitat. I've worked on identifying the particular structural features associated with spotted owl foraging and nesting, and the abundance of truffles, the main food source for the owl's prey, in these stands. With this interest I've worked on methods for describing and quantifying forest canopy structure, and how this structure varies in forest stands at different successional stages.
- University of Washington, Ph.D. Forest Ecosystem Analysis, 1993
- Yale University, M.F.S. Forest Ecology, 1988
- Vassar College, B.A. English, 1979
Publications & Products
- Lydersen, Jamie; North, Malcolm; Collins, Brandon M. 2014. Severity of an uncharacteristically large wildfire, the Rim Fire, in forests with relatively restored frequent fire regimes.
- Hurteau, Matthew D.; Hungate, Bruce A.; Koch, George W.; North, Malcolm P.; Smith, Gordon R. 2013. Aligning ecology and markets in the forest carbon cycle.
- Minocha, Rakesh; Turlapati, Swathi A.; Long, Stephanie; North, Malcolm. 2013. Fuel treatment effects on soil chemistry and foliar physiology of three coniferous species at the Teakettle Experimental Forest, California, USA.
- Knapp, Eric E.; Skinner, Carl N.; North, Malcolm P.; Estes, Becky L. 2013. Long-term overstory and understory change following logging and fire exclusion in a Sierra Nevada mixed-conifer forest.
- Lydersen, Jamie M.; North, Malcolm P.; Knapp, Eric E.; Collins, Brandon M. 2013. Quantifying spatial patterns of tree groups and gaps in mixed-conifer forests: reference conditions and long-term changes following fire suppression and logging.
- Walsh, D.; North, M. 2012. Appendix: Examples of Forest Structures That May Provide Wildlife Habitat.
- North, M.; Boynton, R.M.; Stine, P.A.; Shipley, K.F.; Underwood, E.C.; Roth, N.E.; Viers, J.H.; Quinn, J.F. 2012. Chapter 10: Geographic information system landscape analysis using GTR 220 concepts.
- North, M; Rojas, R. 2012. Chapter 11: Dinkey north and south project.
- Knapp, E.; North, M.; Benech, M.; Estes, B. 2012. Chapter 12: The variable-density thinning study at Stanislaus-Tuolumne Experimental Forest.
- North, M.; Stine, P. 2012. Chapter 14: Clarifying concepts.
- North, M. 2012. Chapter 15: A desired future condition for Sierra Nevada Forests.
- Safford, H.D.; North, M.; Meyer, M.D. 2012. Chapter 3: Climate change and the relevance of historical forest conditions.
- Roberts, S.; North, M. 2012. Chapter 5: California spotted owls.
- North, M; Manley, P. 2012. Chapter 6: Managing forests for wildlife communities.
- North, M.; Sherlock, J. 2012. Chapter 9: Marking and assessing forest heterogeneity.
- North, Malcolm. 2012. Managing Sierra Nevada forests.
- Lydersen, Jamie; North, Malcolm. 2012. Topographic variation in structure of mixed-conifer forests under an active-fire regime.
- North, Malcolm P.; Collins, Brandon M.; Stephens, Scott L. 2012. Using fire to increase the scale, benefits and future maintenance of fuels treatments.
- North, Malcolm P.; Hurteau, Matthew D. 2011. High-severity wildfire effects on carbon stocks and emissions in fuels treated and untreated forest.
- Van de Water, Kip; North, Malcolm. 2011. Stand structure, fuelloads, and fire behavior in riparian and upland forests, Sierra Nevada Mountains, USA; a comparison of current and reconstructed conditions.
- Hurteau, M.; North, M. 2010. Carbon recovery rates following different wildfire risk mitigation treatments.
- North, Malcolm; Stine, Pete; Zielinski, William; O’Hara, Kevin; Stephens, Scott. 2010. Harnessing fire for wildlife.
- Ma, Siyan; Concilio, Amy; Oakley, Brian; North, Malcolm; Chen, Jiquan. 2010. Spatial variability in microclimate in a mixed-conifer forest before and after thinning and burning treatments.
- Underwood, Emma C.; Viers, Joshua H.; Quinn, James F.; North, Malcolm. 2010. Using topography to meet wildlife and fuels treatment objectives in fire-suppressed landscapes.
- North, Malcolm; Stine, Peter; O'Hara, Kevin; Zielinski, William; Stephens, Scott. 2009. An ecosystem management strategy for Sierran mixed-conifer forests.
- Rambo, T.; North, M. . 2009. Canopy microclimate response to pattern and density of thinning in a Sierra Nevada forest.
- North, M.P.; van de Water, K.M.; Stephens, S.L.; Collins, B.M. 2009. Climate, rain shadow, and human-use influences on fire regimes in the eastern Sierra Nevada, California, USA.
- North, M.; Hurteau, M; Innes, J. 2009. Fire suppression and fuels treatment effects on mixed-conifer carbon stocks and emissions.
- Hurteau, M.; North, M. ; Foines, T. . 2009. Modeling the influence of precipitation and nitrogen deposition on forest understory fuel connectivity in Sierra Nevada mixed-conifer forest.
- Concilio, M.; Chen, J.; Ma, S.; North, M. 2009. Precipitation drives interannual variation in summer soil respiration in a Mediterranean-climate, mixed-conifer forest.
- Soung-Ryoul, R.; Concilio, A. ; Chen, J.; North, M. ; Ma, S. . 2009. Prescribed burning and mechanical thinning effects on belowground conditions and soil respiration in a mixed-conifer forest, California.
- Bigelow, S.W.; North, M.P.; Horwath, W.R. 2009. Resource-dependent growth models for Sierran mixed-conifer saplings.
- Hurteau, M.; North, M. 2009. Response of Arnica dealbata to climate change, nitrogen deposition, and fire.
- Plamboeck, A.; North, M. ; Dawson, T. . 2008. Conifer seedling survival under closed-canopy and manzanita patches in the Sierra Nevada.
- North, M.; Keeton, W. 2008. Emulating natural disturbance regimes: an emerging approach for sustainable forest management.
- Maloney, P.; Smith, T.; Jensen, C.; Innes, J.; Rizzo, D.; North, M. 2008. Initial tree mortality, and insect and pathogen response to fire and thinning restoration treatments in an old growth, mixed-conifer forest of the Sierra Nevada, California.
- Zald, Harold S.J.; Gray, Andrew N.; North, Malcolm; Kern, Ruth A. 2008. Initial tree regeneration responses to fire and thinning treatments in a Sierra Nevada mixed-conifer forest, USA.
- Hurteau, Matthew; North, Malcom. 2008. Mixed-conifer understory response to climate change, nitrogen, and fire.
- Hanson, C.T.; North, M.P. 2008. Postfire woodpecker foraging in salvage-logged and unlogged forests of the Sierra Nevada.
- Rambo, T.; North, M. 2008. Spatial and temporal variability of canopy microclimate in a Sierra Nevada riparian forest.
- Meyer, M.; North, M.; Roberts, S. 2008. Truffle abundance in recently prescribed burned and unburned forests in Yosemite National Park: Implications for mycophagous mammals.
- Hurteau, M.; Zald, H.; North, M. 2007. Species-specific response to climate reconstruction in upper-elevation mixed-conifer forests of the western Sierra Nevada, California.
- Hanson, Chad T.; North, Malcolm P. 2006. Post-fire epicormic branching in Sierra Nevada Abies concolor (white fir).
- North, Malcolm P. 2006. Restoring forest health: fire and thinning effects on mixed-conifer forests.
- Concilio, Amy; Ma, Siyan; Ryu, Soung-Ryoul; North, Malcolm; Chen, Jiquan. 2006. Soil respiration response to experimental disturbances over 3 years.
- Ma, Siyan; Chen, Jiquan; Butnor, John R.; North, Malcolm; Euskirchen, Eugénie S.; Oakley, Brian. 2005. Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest.
- Meyer, Marc D.; North, Malcolm P.; Kelt, Douglas A. 2005. Fungi in the diets of northern flying squirrels and lodgepole chipmunks in the Sierra Nevada.
- Izzo, Antonio D.; Meyer, Marc; Trappe, James M.; North, Malcolm; Bruns, Thomas D. 2005. Hypogeous ectomycorrhizal fungal species on roots and in small mammal diet in a mixed-conifer forest.
- North, Malcolm; Hurteau, Matthew; Fiegener, Robert; Barbour, Michael. 2005. Influence of fire and El Niño on tree recruitment by Sierran mixed conifer.
- North, Malcolm; Oakley, Brian; Fiegener, Rob; Gray, Andrew; Barbour, Michael. 2005. Influence of light and soil moisture on Sierran mixed-conifer understory communities..
- North, Malcolm; Chen, Jiquan. 2005. Introduction to the special issue on Sierran mixed-conifer research.
- Meyer, Marc D.; Kelt, Douglas A.; North, Malcolm P. 2005. Nest trees of northern flying squirrels in the Sierra Nevada.
- Smith, Thomas F.; Rizzo, David M.; North, Malcolm. 2005. Patterns of mortality in an old-growth mixed-conifer forest of the Southern Sierra Nevada, California.
- Meyer, Marc D.; North, Malcolm P.; Kelt, Douglas A. 2005. Short-term effects of fire and forest thinning on truffle abundance and consumption by Neotamias speciosus in the Sierra Nevada of California.
- Concilio, Amy; Ma, Siyan; Li, Qinglin; LeMoine, James; Chen, Jiquan; North, Malcolm; Moorhead, Daryl; Jensen, Randy. 2005. Soil respiration response to prescribed burning and thinning in mixed-conifer and hardwood forests.
- Meyer, Marc D.; North, Malcolm P. 2005. Truffle abundance in riparian and upland mixed-conifer forest of California's southern Sierra Nevada.
- Oakley, Brian; North, Malcolm; Franklin, Jerry F.; Hedlund, Brian P.; Staley, James T. 2004. Diversity and distribution of Frankia strains symbiotic with Ceanothus in California.
- North, Malcolm; Chen, Jiquan; Oakley, Brian; Song, Bo; Rudnicki, Mark; Gray, Andrew; Innes, Jim. 2004. Forest stand structure and pattern of old-growth western hemlock/Douglas-fir and mixed-conifer forests.
- Ma, Siyan; Chen, Jiquan; North, Malcolm; Erickson, Heather E.; Bresee, Mary; Moine, James Le. 2004. Short-term effects of experimental burning and thinning on soil respiration in an old-growth, mixed-conifer forest.
- Chen, Jiquan; Song, Bo; Rudnicki, Mark; Moeur, Melinda; Bible, Ken; North, Malcolm; Shaw, Dave C.; Franklin, Jerry F.; Braun, Dave M. 2003. Spatial relationship of biomass and species distribution in an old-growth Pseudotsuga Tsuga forest..
- North, Malcolm P. 2002. Environmental factors associated with spotted owl reproduction.
- North, Malcolm P. 2002. Seasonality and abundance of truffles from oak woodlands to red fir forests.
- North, Malcolm P. 2002. The Teakettle experiment.
- North, Malcolm; Oakley, Brian; Chen, Jiquan; Erickson, Heather; Gray, Andrew; Izzo, Antonio; Johnson, Dale; Ma, Siyan; Marra, Jim; Meyer, Marc; Purcell, Kathryn; Rambo, Tom; Rizzo, Dave; Roath, Brent; Schowalter, Tim. 2002. Vegetation and Ecological Characteristics of Mixed-Conifer and Red Fir Forests at the Teakettle Experimental Forest.
- North, Malcolm; Steger, George; Denton, Renee; Eberlein, Gary; Munton, Tom; Johnson, Ken. 2000. Association of weather and nest-site structure with reproductive success in California spotted owls.
- Lyons, Betsy; Nadkarni, Nalini M.; North, Malcolm P. 2000. Spatial distribution and succession of epiphytes on Tsuga heterophylla (western hemlock) in an old-growth Douglas-fir forest.
- North, Malcolm P.; Franklin, Jerry F.; Carey, Andrew B.; Forsman, Eric D.; Hamer, Tom. 1999. Forest stand structure of the northern spotted owl's foraging habitat..
- Van Pelt, Robert; North, Malcolm P. 1999. Testing a ground-based canopy model using the wind river canopy crane.
- North, Malcolm; Greenberg, Joshua. 1998. Stand conditions associated with truffle abundance in western hemlock/Douglas-fir forests.
- North, Malcolm; Trappe, James; Franklin, Jerry. 1997. Standing crop and animal consumption of fungal sporocarps in Pacific Northwest forests.
- Van Pelt, Robert; North, Malcolm P. 1996. Analyzing canopy structure in Pacific Northwest old-growth forests with a stand-scale crown model.
- North, Malcolm; Chen, Jiquan; Smith, Gordon; Krakowlak, Lucy; Franklin, Jerry. 1996. Initial response to understory plant diversity and overstory tree diameter growth to a green tree retention harvest.
- North, Malcolm P.; Reynolds, Joel H. 1996. Microhabitat analysis using radiotelemetry locations and polytomous logistic regression.
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