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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Conifer forest"”.
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Mortality Assessment of Redwood and Mixed Conifer Forest Types in Santa Cruz County Following Wildfire
… 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, San Luis Obispo (Cal Poly)’s Swanton Pacific Ranch (SPR), and other resource …
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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
<p>Forest densification in response to 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 …
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A study of basidiomycetes isolated from coarse woody debris and contiguous soil horizons in a mixed deciduous-conifer forest in New Hampshire, United States of America
… coarse woody debris (CWD) in a northern hardwood forest. This link supports the possibility that energy stored in woody debris can facilitate the vertical transfer of elements and compounds within the soil profile. This potential transfer implies new pathways for biogeochemical cycling within …
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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
<p>Forest structure in 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 …
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Influences of forests on invertebrate communities in Icelandic streams
Effects of forests on headwater stream invertebrate communities were studied in eastern and southern Iceland, which are two geologically different regions. The eastern research area is composed of solid basaltic rock with direct run-off streams. The streams drain treeless, birch and conifer …
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The Inhibitory Effect of Rhododendron maximum L. (Ericaceae) Thickets on Mycorrhizal Colonization of Canopy Tree Seedlings
… limitations on the regeneration of hardwood and coniferous seedlings. Interactions between Rm thickets and ectomycorrhizal colonization were examined to explain seedling inhibition. Experimental blocks were established in and out of Rm thickets in a mature, mixed hardwood/conifer forest in Macon …
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SEED BANK DYNAMICS WITHIN A METAPOPULATION FRAMEWORK: A STUDY OF AN ANT-DISPERSED SPECIES
… outcrops within mixed hardwood-conifer forest in Michigan, USA<strong></strong></p> <p><strong>Methods. </strong>We studied the distribution of the <em>Capnoides sempervirens</em> seed bank on outcrops and within the forest matrix in relation to landscape and physiographic (<em>n …
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Transport and decomposition of allochthonous litter in Icelandic headwater streams: Effects of forest cover
… of the present study were to compare non-forested and forested catchments in Iceland in terms of litter transport into streams and litter decomposition within them. This was the first study made in Iceland on the terrestrial-aquatic interactions in forested ecosystems. The main study …
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Regeneration of fire-adapted species in the Sierra Nevada contingent upon repeated fuel treatments and available soil moisture
… have driven a significant fire deficit in the forests of western North America, leading to widespread changes in the composition, structure, and fuels of these historically fire-adapted ecosystems. Over the last few decades, fuel treatments have been widely applied to restore forest structure …
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NEST SITE CHARACTERISTICS OF LEWIS’S WOODPECKER (MELANERPES LEWIS) IN RIPARIAN SYSTEMS OF WESTERN MONTANA
… pine, cottonwood riparian, aspen, and burned conifer forest types, but is declining in much of its range throughout the U.S. and is listed as a Level II Species of Concern in Montana. In western Montana, Lewis’s Woodpeckers commonly breed in riparian bottomlands, but information on …
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NEST SITE CHARACTERISTICS OF LEWIS’S WOODPECKER (MELANERPES LEWIS) IN RIPARIAN SYSTEMS OF WESTERN MONTANA
… pine, cottonwood riparian, aspen, and burned conifer forest types, but is declining in much of its range throughout the U.S. and is listed as a Level II Species of Concern in Montana. In western Montana, Lewis’s Woodpeckers commonly breed in riparian bottomlands, but information on …
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Terrestrial-Aquatic Linkages: Watershed (Geologic and Vegetation) Runoff Influences on Primary Production of a Sub Alpine Lake
… litter interflow, or springs), vegetation type (conifer forest, conifer forest-shrub, alder, mixed, or no vegetation), and underlying bedrock (ultramafic, mafic, felsic, or a combination of these). Macro- and micro-nutrients were analyzed and differences between these ecotypes and seasons (fall …
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Using Airborne Laser Altimetry to Characterize Surface Fuels in Western Montana
Quantifying surface fuels in forests is problematic for land managers due to the difficulty in measuring fuels of different sizes and spatial variability. Estimating fuel loads is important for identifying departures from historical fire regimes, predicting fire behavior and effects, and …
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Using Airborne Laser Altimetry to Characterize Surface Fuels in Western Montana
Quantifying surface fuels in forests is problematic for land managers due to the difficulty in measuring fuels of different sizes and spatial variability. Estimating fuel loads is important for identifying departures from historical fire regimes, predicting fire behavior and effects, and …
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Identifying the effects of land use and policy on disturbance regimes in the Teanaway Community Forest, Washington
The historic fire regime of the forests of the Eastern Cascades, Washington, has been described as one of high-frequency, low-severity fires using fire scar analysis. Over the past few centuries, the historically open, park-like ponderosa pine-dominated stands have been significantly altered due to …
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The Role of Fire in Montane Forest Environments in the Willamette National Forest, Oregon
… Blair Lake watershed in the Willamette National Forest of Oregon. The record shows that during the late glacial period, overall fire frequency was relatively low. <em>Pinus </em>and <em>Abies </em>were the dominant vegetation, along with <em>Pseudotsuga </em>and <em>Alnus</em>, suggesting that an …
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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 birds and …
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Deposition and Fate of Atmospheric Mercury in Forested Landscapes of the Adirondack Park, NY
… and fate of atmospheric mercury (Hg) to forested landscapes of the Adirondack region in Upstate New York. Despite the fact that forests are the dominant land cover in North America, there has been relatively little research on the deposition, transport, and fate of Hg within forested …
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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 severity on …
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