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Showing 1 to 20 of 21 for “"Red Spruce"”.
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Modeling Stem Taper of Southern Appalachian Red Spruce
Red spruce (Picea rubens Sarg.) is a commercially and ecologically important conifer species that primarily exists at northern latitudes of eastern North America. During the last glaciation, its range extended down the Appalachian Mountain chain into North Carolina and Tennessee. Since the planet …
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Analysis of red spruce (Picea rubens) regeneration in Pocahontas, Randolph, and Tucker counties, West Virginia
Three red spruce communities in the Central Appalachians of West Virginia were accessed temporally over a period of 10 to 11 years and by forest zones (i.e. hardwood, ecotone, red spruce zones). These communities experienced an increasing density of red spruce over time across all forest zones. Red …
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Red spruce physiology and growth in response to elevated CO₂, water stress and nutrient limitations
Spruce-fir ecosystems of the eastern United States interest scientists because of reported changes in population growth. Whether red spruce (Picea rubens Sarg.) populations are declining because of disease, pollution or environmental stress or experiencing natural changes in stand development is …
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Laboratory and field ecophysiological studies on the impact of air pollution on red spruce and Fraser fir
… the impact of air pollution on high-elevation red spruce-Fraser fir forests in the Southern Appalachians. In the first study, red spruce (Picea rubens Sarg.) and Fraser fir (Abies fraseri (Pursh.) Poir.) seedlings were submitted to long-term (2.5 yrs), multiple growing cycle (4 and 5, …
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Restoration of Red Spruce (Picea rubens) and Virginia Northern Flying Squirrel (Glaucomys sabrinus fuscus) Habitat in West Virginia
… a rare subspecies that relies on high-elevation red spruce (Picea rubens) forests in the central Appalachian Mountains of West Virginia and Virginia. Existing habitat suitability models emphasize the composition of the red spruce canopy but lack insights into the structural characteristics of the …
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Biotic and Abiotic Factors of Picea rubens (Red Spruce) Seedling Regeneration in Disturbed Heathland Barrens of the Central Appalachians
… 19th and early 20th centuries, extensive logging reduced the forests of red spruce (Picea rubens) by nearly 99% through portions of West Virginia. In the wake of this disturbance, red spruce has begun regenerating on the ridge and mountaintop areas of Canaan Valley, West Virginia, where heath and …
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Competitive status of red spruce (Picea rubens) and Fraser fir (Abies fraseri) at ecotonal transitions in southern Appalachian sky islands
Southern Appalachian spruce-fir sky islands are globally threatened, boreal relict forests where red spruce (Picea rubens) and Fraser fir (Abies fraseri) are dominant. Fraser fir dominates at the highest elevations with spruce-fir and spruce-dominated stands at middle elevations and hardwoods …
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Purification and characterization of glutathione reductase isozymes specific for the state of cold hardiness of red spruce (Picea rubens sarg.)
Isozymes of glutathione reductase (GR) have been purified from red spruce. A major isozyme is present throughout the year, while one isozyme is present only during summer in non-hardened needles. A third isozyme is present only during winter in hardened needles. The isozymes present in non-hardened …
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The influences of atmospheric nitrates and annual climatic variables in predisposition to winter desiccation injury in Fraser fir and red spruce
The occurrence of winter injury in red spruce (<u>Picea rubens</u>) L. sarg. and Fraser fir (<u>Abies fraseri</u>) pursh. poir. in relation to the level of atmospheric nitrates and climatic parameters of precipitation and temperatures was investigated. Data and foliage samples were collected from …
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Spatial Patterns on Virginia's Second Highest Peak: Land Cover Dynamics and Tree Mortality in Two Rare Ecosystems
… a southern Appalachian grass bald and a red spruce-dominated forest. These areas provide important ecosystem services and habitat for rare and endangered species. They are highly prized for their cultural value and recreational areas that support nearby rural economies. This thesis …
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Growth response and drought susceptibility of forest trees exposed to simulated acidic rain and ozone
One-year-old seedlings of red spruce, loblolly pine, yellow-poplar, and sweetgum were exposed to ozone (0.0 or 0.1 ppm, 4 hr d⁻¹, 3 d wk⁻¹) in combination with simulated acidic rain (pH 5.6 or 3.0, 1 h d⁻¹, 2 d wk⁻¹, 0.75 cm hr⁻¹) for ten weeks. After the ten-week treatment with ozone and simulated …
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Nuclear and cytoplasmic genetic variation in Picea: DNA markers for evaluating past migration, introgression and evolutionary history
… of white (Picea glauca), black (P. mariana ) and red spruce (P. rubens). The chloroplast genome exhibited more intraspecific variation than the mitochondrial genome. Red spruce displayed the most total chloroplast genetic diversity (H T = 0.52). Neighbor-joining analysis arranged the chloroplast …
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Determining Habitat Associations of Virginia and Carolina Northern Flying Squirrels in the Appalachian Mountains from Bioacoustic and Telemetry Surveys
… Both subspecies were listed under the Endangered Species Act in 1985 as endangered, and accordingly, the Virginia northern flying squirrel and the Carolina northern flying squirrel are considered high conservation priorities by state and federal agencies. Although the listing prompted work to …
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Ecological and taxonomic studies of the Russulaceae and other ectomycorrhizal Basidiomycetes in the high-elevation forests of the southern Appalachians
… of ectomycorrhizal Basidiomycetes fruiting in red spruce and adjacent northern hardwood forests in West Virginia was evaluated and compared with other ectomycorrhizal Basidiomycetes occupying the same habitats. The Russulaceae exhibited the greatest species diversity of any family of …
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Spatial Pattern Analysis of Tree Species Distribution in a Central Appalachian Upland Heath Barren
… of facilitation are occurring among encroaching red maple and striped maple, while red spruce is in competition with both species of maple, and that relationships are formed outside the influence of topographic characteristics of the site.
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Stand structure, growth, and mortality in southern Appalachian spruce-fir
… m) permanent plots at three southern Appalachian spruce-fir sites (Mt. Rogers National Recreation Area (NRA) of Virginia, the Black Mountains of North Carolina, and the Great Smoky Mountains of Tennessee and North Carolina). Baseline conditions were documented to accommodate future efforts to …
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Factors associated with Atlantic white -cedar seedling recruitment on microtopographic and landscape scales, Brown Mill Pond, Rye, New Hampshire
… identified cedar communities were measured for differences in water table level and soil moisture in order to determine associations between stand dynamics and hydrology.</p><p>A field survey showed that cedar seedlings were (1) absent from hummocks with tussock sedge substrate and …
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Forest songbird abundance and viability at multiple scales on the Monongahela National Forest, West Virginia
… types: mixed mesophytic, northern hardwoods, red spruce, and dry oaks. At the landscape scale, forest types differed in bird abundance (p = 0.07) and species richness (p = 0.08). Abundance of forest-interior species, Neotropical migrants, and nine key indicator species were greatest in the …
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A Re-Evaluation of Mountain Lake, Giles County, Virginia: Lake Origins, History and Environmental Systems
… extended periods of low or empty lake level occurred (at approximately 100, 400, 900, 1200, 1800, and 4200 yrs bp). Several of these low intervals are likely to correspond with cool dry conditions co-incident with solar minima events. When the lake has been low or empty, it has tended to develop …
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The Physiological Ecology of Fraser FIr in Southern Appalachian Cloud Forests
… and eastern Tennessee. Usually associated with red spruce, Picea rubens Sarg., these forests are receive greater than 1500 mm yr-1 precipitation, with as much as 50% of their annual precipitation due to cloud water deposition. Furthermore, these forests are immersed in clouds 30-40% of the time …
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