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Showing 1 to 16 of 16 for “"picea rubens"”.
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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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Restoration of Red Spruce (Picea rubens) and Virginia Northern Flying Squirrel (Glaucomys sabrinus fuscus) Habitat in West Virginia
… 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 forest that …
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Biotic and Abiotic Factors of Picea rubens (Red Spruce) Seedling Regeneration in Disturbed Heathland Barrens of the Central Appalachians
… 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 grassland communities have both …
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Competitive status of red spruce (Picea rubens) and Fraser fir (Abies fraseri) at ecotonal transitions in southern Appalachian sky islands
… 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 associating at lower elevations. A primary concern is …
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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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Le potentiel de régénération naturelle de l'épinette rouge (picea rubens sarg.) sur les anciennes terres agricoles dans le Parc National de l'Île-du Prince-Édouard
… écologique des parcs nationaux. Mots-clés : Picea rubens, régénération, vieux champ, banque de semences, pluie de graines".--Sommaire.
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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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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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Red spruce physiology and growth in response to elevated CO₂, water stress and nutrient limitations
… 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 unclear. This research examined the growth and physiological responses of red spruce …
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Development of soil lead and tree-ring methods for characterizing atmospheric deposition gradients and subsequent tree growth responses
… on tree growth by sampling three tree species (Picea rubens, Liriodendron tulipifera, and Betula alleghaniensis) along spatial gradients of deposition within the eastern United States. By studying tree-rings along the gradient, I was able to examine the inherently long-term and cumulative …
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Factors associated with Atlantic white -cedar seedling recruitment on microtopographic and landscape scales, Brown Mill Pond, Rye, New Hampshire
… while in the driest community red spruce (Picea rubens) and eastern hemlock (Tsuga canadensis) dominated the understory and were expected to replace cedar over successional time.</p>
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Laboratory and field ecophysiological studies on the impact of air pollution on red spruce and Fraser fir
… 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, respectively), intermittent ozone fumigations (0.025, 0.070, and 0.150 ppm). No effect of ozone …
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Site factors determining epiphytic lichen distribution in a dieback-affected spruce-fir forest on Whiteface Mountain, New York
In einem Abies balsamea-Picea rubens-Bestand am Whiteface Mountain im US-Bundesstaat New York wurde die epiphytische Diversität der Flechtenvegetation zwischen gesunden und immissionsgeschädigten Rotfichten (Picea rubens) sowie zwischen Rotfichte und Balsamtanne (Abies balsamea) miteinander …
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Determining Habitat Associations of Virginia and Carolina Northern Flying Squirrels in the Appalachian Mountains from Bioacoustic and Telemetry Surveys
… Regional interest in restoration of red spruce (Picea rubens) forests in the central and southern Appalachian Mountains, considered to be the flying squirrels' primary habitat, increases the importance of understanding habitat selection and managers' ability to detect squirrels at multiple …
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The Physiological Ecology of Fraser FIr in Southern Appalachian Cloud Forests
… 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 during the …
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Stand structure, growth, and mortality in southern Appalachian spruce-fir
… to follow an elevation gradient: red spruce (Picea rubens Sargent) dominance changing to Fraser fir (Abies fraseri (Pursh) Poiret) dominance as elevation increased. Current stand composition at the Black Mountains and the Great Smokies also showed a shift from spruce to fir; however, Mt. …