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Patterns of mortality in an old-growth mixed-forest of the southern Sierra Nevada, California

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:: of the Southern Sierra Nevada, California Thomas F. Smith, David M. Rizzo, and Malcolm North

Patterns of mortality in an old-growth mixed-conifer forest of the southern Sierra Nevada, California

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:: of the Southern Sierra Nevada, California Thomas F. Smith, David M. Rizzo, and Malcolm North

Stand conditions associated with tree regeneration in Sierran mixed-conifer forests

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:: shadier conditions except for Jeffrey pine, which was found on drier, more open microsites. Although

Influence of fire and El Nino on tree recruitment varies by species in Sierran mixed conifer

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:: 1865, Jeffrey pine and sugar pine recruitment were correlated with wet El Niño years, but only sugar

Hypogeous ectomycorrhizal fungal species on roots and in small mammal diet in a mixed-conifer forest

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:: Small Mammal Diet in a Mixed-Conifer Forest Antonio D. Izzo, Marc Meyer, James M. Trappe, Malcolm North

Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest

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:: among the patch types, ranging from 2.0 to 4.5 �mol m�2 s�1 and from 0.9 to 2.9 �mol m�2 s�1 during the

Short-term effects of experimental burning and thinning on soil respiration in an old-growth, mixed-conifer forest

Creator:: Ma, Siyan, Chen, Jiquan, North, Malcolm, Erickson, Heather E., Bresee, Mary, and Le Moine, James
Abstract:: To understand the roles of forest management practices in meeting the goals of forest sustainability and CO2 sequestration, we evaluated the effects of burning and thinning treatments on soil respiration and soil environments in an old-growth, mixed-conifer forest in California’s southern Sierra Nevada. Six experimental treatments with two levels of...
Resource Type:: Article
Full Text:: patch types. In 2000, SRR was 0.75, 0.86, and 0.26 g CO2 m -2 hr-1 in CC, CECO, and OC, respectively

Forest stand structure and pattern of old-growth Western Hemlock/Douglas-Fir and mixed-conifer forests

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
Full Text:: .). Sugar and Jeffrey pine are the largest diameter and tallest trees. Mean dominant tree height is 50–60 m

Influence of light and soil moisture on Sierran mixed-conifer understory communities

Creator:: North, Malcolm, Oakley, Brian, Fiegener, Rob, Gray, Andrew, and Barbour, Michael
Abstract:: Sierra Nevada forests have high understory species richness yet we do not know which site factors influence herb and shrub distribution or abundance. We examined the understory of an old-growth mixed-conifer Sierran forest and its distribution in relation to microsite conditions. The forest has high species richness (98 species sampled),...
Resource Type:: Article
Full Text:: 1300 ha Teakettle Experimental Forest, ele- vation 1900–2600 m, located 80 km east of Fres- no, CA on

Soil respiration response to prescribed burning and thinning in mixed-conifer and hardwood forests

Creator:: Concilio, Amy, Ma, Siyan, Li, Qinglin, LeMoine, James, Chen, Jiquan, North, Malcolm, Moorhead, Daryl, and Jensen, Randy
Abstract:: The effects of management on soil carbon efflux in different ecosystems are still largely unknown yet crucial to both our understanding and management of global carbon flux. To compare the effects of common forest management practices on soil carbon cycling, we measured soil respiration rate (SRR) in a mixed-conifer and...
Resource Type:: Article
Full Text:: Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA. M. North. USDA Forest

ScholarsArchive@OSU

Patterns of mortality in an old-growth mixed-forest of the southern Sierra Nevada, California

Patterns of mortality in an old-growth mixed-conifer forest of the southern Sierra Nevada, California

Stand conditions associated with tree regeneration in Sierran mixed-conifer forests

Influence of fire and El Nino on tree recruitment varies by species in Sierran mixed conifer

Hypogeous ectomycorrhizal fungal species on roots and in small mammal diet in a mixed-conifer forest

Biophysical controls on soil respiration in the dominant patch types of an old-growth, mixed-conifer forest

Short-term effects of experimental burning and thinning on soil respiration in an old-growth, mixed-conifer forest

Forest stand structure and pattern of old-growth Western Hemlock/Douglas-Fir and mixed-conifer forests

Influence of light and soil moisture on Sierran mixed-conifer understory communities

Soil respiration response to prescribed burning and thinning in mixed-conifer and hardwood forests

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