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Showing 1 to 20 of 20 for “"mixed conifer"”.
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Vegetation Responses to Prescribed Burning in a Mixed-conifer Woodland, Cuyamaca Rancho State Park, California
<p>This study reports the results of light intensity prescribed burning on the vegetation of 3 jeffrey pine-black oak woodland sites in Cuyamaca Rancho State Park, California. The 1.2 ha, 85 ha, and 6 ha burn plots were measured for tree and shrub density and basal area 6 months, 1% years, and 2 …
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Mortality Assessment of Redwood and Mixed Conifer Forest Types in Santa Cruz County Following Wildfire
<p>On August 12, 2009, the Lockheed Fire ignited the west slope of the Santa Cruz Mountains burning approximately 7,819 acres. Foresters and other land managers were left with challenging decisions on how to evaluate tree mortality. Big Creek Lumber Company, California Polytechnic State University, …
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Holocene Fire History Reconstruction of a Mid-Evaluation Mixed-Conifer Forest in the Eastern Cascades, Washington
Fire histories of mid-elevation mixed-conifer forests (MEMC) are uncommon, particularly in the eastern Cascades of Washington. As a result, fire regimes and the effects of 20th century fire suppression in these forests are not well understood. In the summer of 2014 a 7.80 meter-long sediment core …
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Forest Densification Over 85 Years in a Sierra Nevada Mixed-Conifer Forest Decreases Conifer Regeneration and Limits Survival
… a century of fire suppression in Sierra Nevada mixed conifer forests has decreased conifer regeneration and survival. Increases in overstory biomass and decreases in canopy heterogeneity, along with decreases in shrub cover in the understory, has created unfavorable establishment site conditions …
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A Comparative Study of Tree Structure and Composition of a mixed Coniferous Forest and Sequoia Groves in Sequoia National Park, California
… the giant sequoia grove and in the surrounding mixed coniferous forest is dominated by Abies concolor. The large basal area of Sequoiadendron giganteum is significant within the grove in terms of relative dominance but does not offset the density of Abies concolor which showed nearly identical …
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The 2006 Warm Fire: effects on habitat and prey species of the northern goshawk
… of fire in Southwestern ponderosa pine and mixed-conifer forests since initiation of forest management early in 20th century changed the composition and structure of the forest habitats of the northern goshawks (Accipiter gentilis), a food-limited species of conservation concern, and the …
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High-Resolution Record of Vegetation and Climate Change During the Holocene in Southwestern Québec
… woodland, the establishment of the boreal and mixed conifer-hardwood forest into the area, as well as the expansion and contractions of tree populations in response to climate variability during the Holocene. The well known Tsuga decline at Lac Noir lasted 500 years starting at 5.5 ka and it …
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Disturbance ecology and size class structure of the Mulanje cedar of Malawi, Widdringtonia whytei and associated broadleaved forest
… and regeneration patterns of the emergent conifer, Widdringtonia whytei, and five broadleaved species, Aphloia theiformis, Rapanea melanophloeos, Maesa lanceolata, Maytenus accuminata and Psychotria mahonii, were inferred from population size structures in the mixed conifer-broadleaved …
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Relationship of Tecate Cypress Distribution to Soil Types
… than the soils of big-cone Douglas fir, mixed conifer, knob cone pine and oak woodlands.</p> <p>Thus it appears that the Tecate Cypress may be limited to acidic soils that are nutrient poor and thereby lacking the competition found on typical chaparral soils. This may be a factor in their …
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Ecological responses by Mexican spotted owls to environmental variation in the Sacramento Mountains, New Mexico
… in the study area and comparisons between a mixed-conifer, late-seral plot and a mid-seral plot indicated that microhabitat variables associated with Mexican woodrat abundance and the amount of woodrat biomass available to Mexican spotted owls likely declined with past timber harvest. …
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Regeneration of fire-adapted species in the Sierra Nevada contingent upon repeated fuel treatments and available soil moisture
… of repeated fuel treatments in the Sierra Nevada mixed-conifer forest type to examine the regeneration response of six native tree species to repeated applications of three different treatments: prescribed fire, mechanical treatments, and mechanical treatments followed by prescribed fire. With …
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Forest futures
… at a point within the northern Californian mixed-conifer fire cycle - fighting fire, after the burn, and working with fire. Mendocino National Forest, even as the least visited in California, is filled with overlapping human and non-human worlds. Each chapter proposes an architectural …
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Forest structure in unharvested old-growth: understanding the influence of soils on variability of long-term tree dynamics and fire history
… 1800s were likely not intense enough to kill all conifers over large areas, but were intense enough to kill most aspen stems on two of four sampled mesas. The mixed-severity nature of historical fires indicates that forest managers should have the leeway to plan for a spectrum of low to high …
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Using Airborne Laser Altimetry to Characterize Surface Fuels in Western Montana
… surface roughness and fuels were explored in mixed-conifer forest using a relatively sparse LiDAR dataset (~1 point/m2). Surface roughness was imputed as the standard deviation of ground height distribution of laser pulse returns. Field data were derived from the nationally-scoped Fire-Fire …
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Using Airborne Laser Altimetry to Characterize Surface Fuels in Western Montana
… surface roughness and fuels were explored in mixed-conifer forest using a relatively sparse LiDAR dataset (~1 point/m2). Surface roughness was imputed as the standard deviation of ground height distribution of laser pulse returns. Field data were derived from the nationally-scoped Fire-Fire …
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Identifying the effects of land use and policy on disturbance regimes in the Teanaway Community Forest, Washington
… transition from more open ponderosa pine and mixed-conifer forest to uncharacteristically overstocked grand fir-dominated forest has occurred, which have drastically increased the potential for extreme fire behavior. These changes are due primarily to modern land use changes, including fire …
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Habitat variation effects on cavity-nesting bee fitness, community assemblages, and parasite interactions in the Colorado Front Range
… they can reproduce within various dry, mixed conifer forested habitats. However, urbanization in forested ecosystems likely decreases exposure to nest parasites. Alternatively, local, cavity-nesting bee-parasite interactions differed among habitat types, with hosts inhabiting control …
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Megafires in the temperate conifer forests of the Sierra Nevada mountains of California from 1985 to 2020: remote sensing and field-based analysis of fire characteristics and vegetation recovery dynamics
… fire regime is evident in the temperate mixed-conifer forests of the Sierra Nevada region of California. This thesis employs a mixed-methods approach of remote sensing, field surveys, and statistical analysis to investigate the effects of fire events of extreme size, frequency, and …
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Disentangling how climate change and forest management alter fuels and fire regimes in Sierra Nevada forests
… and carbon retention in a high-elevation, mixed conifer-dominated watershed in the Sierra Nevada Mountains. I found that climate change led to smaller and more frequent fires across the landscape and that fire hazard increased in the most mesic locations of the watershed due to their …
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A Floristic Study of the Cal Poly Swanton Pacific Ranch and a New Combination in Sanicula crassicaulis (Apiaceae), Sanicula crassicaulis var. Nudicaulis
… prairie, riparian forest, redwood forest, mixed conifer forest and chaparral in approximate ascending order of elevation. The property extends over an elevational gradient from 0 m to 420 m (1400 ft). We documented 634 taxa at SPR. In total, 974 specimens were collected during this project, …