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Showing 1 to 20 of 51 for “"Pinus ponderosa"”.
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A molecular characterization of the fungal endophytes within the needles of ponderosa pine (Pinus ponderosa)
… secondary metabolites. While the endophytes in Pinus ponderosa roots have been studied, the endophyte communities within the needles are not well characterized by molecular means: thus, the goal of this study was to do so. Needles were sampled at two sites located five kilometers apart along a …
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Eco-hydrological pathways inferred from stable isotopes in a Pinus ponderosa and Pinus monophylla woodland of the Sheep Range, southern Great Basin, USA
… in the southern Great Basin of Nevada- <italic>Pinus ponderosa</italic> and <italic>Pinus monophylla</italic>.Samples of xylem and leaf tissues from multiple trees at the site were collected and analyzed for δ<super>18</super>O and δD. Additional samples from groundwater, soil …
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Habitat Selection of White-tailed and Mule Deer in the Southern Black Hills, South Dakota
… Most habitats in the Black Hills are becoming ponderosa pinedominated climax communities. Such pine communities will not support as many deer as early successional vegetative stages. To better understand the declining white-tailed deer and mule deer (Odocoi/eus hemionus hemionus) populations in …
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Embryonic control of isocitrate lyase activity in the megagametophyte of Ponderosa pine seeds
… from the embryo of stratified germinating Pinus ponderosa seeds. In contrast, the data reported here indicate the rate of increase in specific activity of embryoless seeds was greater during the first four days than in seeds with embryos left in situ. A similar pattern of activity was …
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Episodic Recruitment and Climate Analysis of Ponderosa Pine on the Palmer Divide, Eastern Colorado
<p>Previous recruitment studies on populations of ponderosa pine (<em>Pinus ponderosa</em> P. & C. Lawson) in Colorado have been limited to the western mountains and the Front Range. In this research I used tree-ring data to reconstruct recruitment for ponderosa pine near the eastern limits of its …
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The Effects of Forest Management on Birds in the Black Hills of South Dakota
… birds were counted in seven structural stages of ponderosa pine (Pinus ponderosa), four structural stages of quaking aspen (Populus tremuloides ), and meadow habitats of the Black Hills, South Dakota during 1992 and 1993. I observed 69 species during this study. Dark - eyed Juncos (Junco hyemalis) …
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Mammal Damage and Movements of Deer Mice in South Dakota Shelterbelts
… The rodents preferred honeysuckle and avoided ponderosa pine (Pinus ponderosa Laws. ) . Rabbits preferred Siberian elm (Ulmus pumila L.) and honeysuckle and avoided ponderosa pine. Average home range size was 0. 06 hectares. Movement occurred more on the ground and lower elevations in trees …
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Biology of the Porcupine (Erethizon Dorsatum) in northwestern South Dakota
… shrub, hawthorne (Crataegus spp.) was second. Ponderosa pine (Pinus ponderosa), willow (Salix spp.) and green ash (Fraxinus pennsylvanicus) were the most common tree species consumed. Alfalfa (Medicago sativa), wild licorice (Glycyrrhiza lepidota), yellow sweetclover (Melilotus officinalis) and …
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Variation in the Bimodal Precipitation Regime of Southern Nevada, USA Measured in Tree-Ring Isotopes
… isotopes, and tree rings from an old-growth ponderosa pine (Pinus ponderosa) stand in southern Nevada, USA. We tested if variation in the bimodal precipitation regime could be measured in the stable isotopes of tree rings. Hourly measurements from a meteorological station adjacent to the …
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Assessment of Prediction Bias in Crown Biomass Equations for Important Conifer Species of the Inland Northwest
… were found to over-predict the crown mass of ponderosa pine (Pinus ponderosa) and western larch (Larix occidentalis), and under-predict the crown mass of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta). Further, it was found that the magnitude of the bias increased with …
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Assessment of Prediction Bias in Crown Biomass Equations for Important Conifer Species of the Inland Northwest
… were found to over-predict the crown mass of ponderosa pine (Pinus ponderosa) and western larch (Larix occidentalis), and under-predict the crown mass of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta). Further, it was found that the magnitude of the bias increased with …
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Effects of Ponderosa Pine Ecological Restoration on Forest Soils and Understory Vegetation in Northern Arizona
… since settlement have caused dramatic changes in ponderosa pine (<em>Pinus ponderosa </em>Dougl ex Laws) forest ecosystems. These changes include increased numbers of tree stems, reduced understory cover and diversity, and the introduction of invasive, non-native understory species. This study …
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Restoration of Eroded Lands with Biochar as Soil Amendment in South Dakota
… Three types of biochar including corn stover, ponderosa pine (Pinus ponderosa Lawson and C. Lawson) wood residue, and switchgrass (Panicum virgatum L.) were applied in the field and compared with control and manure treatments. Data showed that biochar significantly affected the pH and labile …
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Effect of Scale on Habitat Selection of Female White-Tailed Deer in the Central Black Hills, South Dakota and Wyoming
… meso scale, vegetation structure was important. Ponderosa pine (Pinus ponderosa) appeared to be used as thermal cover in winter to compensate for poor forage availability. Preference by deer for areas with high productivity but with low coverage by forbs and shrubs suggested that competition by …
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A Food Habits Study of Whitetail Deer In The Black Hills
… of moderate importance were bearberry, grasses, ponderosa pine (Pinus ponderosa), bur oak (Quercus macrocarpa), and lichens (Usnea sp.). Snow depth was the most important factor affecting availability. As snow depth increased common juniper use increased while Oregon grape and bearberry use …
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A comparison of Aspen and Pine Communities in the Northern Black Hills
… aspen (Populus tremuloides) community, a pine (Pinus ponderosa) community, and a mixed aspen-pine community, were studied during the summers of 1968, 1969, and 1970. Soil chemistry, plant chemistry, overstory density, understory production, and use by whitetail deer (Odocoileus virginianus) and …
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Geochemical Investigations of Mineral Weathering: Quantifying Weathering Intensity, Silicate versus Carbonate Contributions, and Soil-Plant Interactions
… of the 87Sr/86Sr ratios of architectural ponderosa pine in Chaco Canyon, New Mexico confirms a societally complex style of timber procurement from the 10th to the 12th centuries. In El Malpais National Monument, New Mexico, we measured the 87Sr/86Sr ratios in local bedrock and soils and …
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Characterizing Crown Struture of Three Interior Northwest Conifer Species Using Terrestrial Laser Scanning
… heterogeneity in Pseudotusga menziesii, Pinus ponderosa, and Abies lasiocarpa of the Interior Northwest. Crown profiles were modeled using parametric curves applied to crown-length normalized laser point clouds, dimensioned by height above ground and distance from bole-centroids. A …
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Characterizing Crown Struture of Three Interior Northwest Conifer Species Using Terrestrial Laser Scanning
… heterogeneity in Pseudotusga menziesii, Pinus ponderosa, and Abies lasiocarpa of the Interior Northwest. Crown profiles were modeled using parametric curves applied to crown-length normalized laser point clouds, dimensioned by height above ground and distance from bole-centroids. A …
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Analysis of Dryland Forest Phenology using Fused Landsat and MODIS Satellite Imagery
… and climatic conditions on dryland ponderosa pine (Pinus ponderosa) forest phenological patterns. The results showed that elevation and slope controlled the variability of peak timing across years, with lower elevations and shallower slopes linked to higher levels of variability. …
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