Index Catalog // ScholarsArchive@OSU

Creator:: Oakley, Brian, North, Malcolm, Franklin, Jerry F., Hedlund, Brian P., and Staley, James T.
Abstract:: Frankia strains symbiotic with Ceanothus present an interesting opportunity to study the patterns and causes of Frankia diversity and distribution within a particular host infectivity group. We intensively sampled Frankia from nodules on Ceanothus plants along an elevational gradient in the southern Sierra Nevada of California, and we also collected...
Resource Type:: Article
Full Text:: , American Society for Microbiology. All Rights Reserved. Diversity and Distribution of Frankia Strains

Creator:: Ma, Siyan, Chen, Jiquan, Butnor, John R., North, Malcolm, Euskirchen, Eugenie S., and Oakley, Brian
Abstract:: Little is known about biophysical controls on soil respiration in California’s Sierra Nevada oldgrowth, mixed-conifer forests. Using portable and automated soil respiration sampling units, we measured soil respiration rate (SRR) in three dominant patch types: closed canopy (CC), ceanothus-dominated patches (CECO), and open canopy (OC). SRR varied significantly among the...
Resource Type:: Article
Full Text:: . Copyright © 2005 by the Society of American Foresters Forest Science 51(3) 2005 221 determine this

Creator:: Izzo, Antonio D., Meyer, Marc, Trappe, James M., North, Malcolm, and Bruns, Thomas D.
Abstract:: The purpose of this study was to estimate the portion of an ectomycorrhizal (ECM) fungi root community with a hypogeous fruiting habit. We used molecular methods (DNA sequence analysis of the internally transcribed spacer [ITS] region of rDNA) to compare three viewpoints: ECM fungi on the roots in a southern...
Resource Type:: Article
Full Text:: received June 11, 2003, accepted December 21, 2004 Copyright © 2005 by the Society of American Foresters

Creator:: Smith, Thomas F., Rizzo, David M., and North, Malcolm
Abstract:: Mortality patterns in an old-growth, mixed-conifer forest, in the absence of wildfire, were investigated at the Teakettle Experimental Forest from 2000 to 2002. We tested the hypothesis that after a century of fire suppression, pathogen- and insect-associated mortality (between episodic droughts) would be significantly greater on ingrowth trees (i.e., smaller-diameter,...
Resource Type:: Article
Full Text:: , 2005 Copyright © 2005 by the Society of American Foresters 266 Forest Science 51(3) 2005 pest

Creator:: Gray, Andrew N., Zald, Harold S.J., Kern, Ruth A., and North, Malcolm
Abstract:: Fire suppression has significantly increased canopy cover, litter depth, and stem density in many western forests, altering microsite conditions that affect tree seedling establishment. We conducted studies in a mixed-conifer forest in the Sierra Nevada, California, to determine relationships between established understory trees and microsite quality, and to examine the...
Resource Type:: Article
Full Text:: of American Foresters 198 Forest Science 51(3) 2005 when tree survival and growth is most

Creator:: North, Malcolm, Hurteau, Matthew, Fiegener, Robert, and Barbour, Michael
Abstract:: The influence of fire and climate events on age structure of different species was examined in old-growth mixed conifer in the southern Sierra Nevada. Within a 48-ha stem-mapped sample area, after a mechanical thinning, all stumps were examined for fire scars and 526 stumps were cut to ground level and...
Resource Type:: Article
Full Text:: the Society of American Foresters Forest Science 51(3) 2005 187 with deep, moist soils near creeks

Creator:: North, Malcolm and Chen, Jiquan
Abstract:: Like much of the western United States, California’s forest has been severely altered by a century of fire suppression. The Sierra Nevada’s largest forest type, mixed conifer, which is primary habitat for more vertebrate species than any other Californian forest community, historically burned every 12–17 years. In 1894, John Muir...
Resource Type:: Article

Creator:: North, Malcolm, Chen, Jiquan, Oakley, Brian, Song, Bo, Rudnicki, Mark, Gray, Andrew, and Innes, Jim
Abstract:: With fire suppression, many western forests are expected to have fewer gaps and higher stem density of shade-tolerant species as light competition becomes a more significant influence on stand pattern and composition. We compared species composition, structure, spatial pattern, and environmental factors such as light and soil moisture between two...
Resource Type:: Article

Creator:: Smith, Thomas F., Rizzo, David M., and North, Malcolm
Abstract:: Mortality patterns in an old-growth, mixed-conifer forest, in the absence of wildfire, were investigated at the Teakettle Experimental Forest from 2000 to 2002. We tested the hypothesis that after a century of fire suppression, pathogen- and insect-associated mortality (between episodic droughts) would be significantly greater on ingrowth trees (i.e., smaller-diameter,...
Resource Type:: Article

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