Global ETD Search
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Showing 1 to 20 of 21 for “"Pinyon"”.
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Mule Deer Responses to a Pinyon-Juniper Removal
… One of these reasons is expansion of single-leaf pinyon (Pinus monophylla) and Utah juniper (Juniperus osteosperma) into sagebrush communities in the Great Basin. Pinyon-juniper woodlands are adept at outcompeting herbaceous vegetation that is crucial for mule deer. We administered a …
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Ecology and Conservation of Birds of Pinyon -Juniper Woodlands
… leading to a bark-beetle outbreak that killed pinyon pines over several million ha of pinyon juniper woodlands. On 15 study sites in Arizona and Utah, I found no evidence that any bird species had declined in response to pine mortality between 2001 and 2005. In 2004, during the drought, and …
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Response of Pinyon-juniper woodlands to fire, chaining, and hand thinning
Pinyon-juniper (Pinus monophylla - Juniperus osteosperma) woodlands have expanded and infilled over the last 150 years to cover more than 40 million ha in the Great Basin. Many land managers seek to remove Pinyon-juniper trees using a variety of treatments. This thesis looks at six different …
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Studies on Species of the Aphid Genus Cinara on Pinus Edulis and Pinus Monophylla
… analysis of Cinara species feeding on pinyon pines and determined that switching hosts played a key role in the speciation of the genus. This was reflected in the fact that species sharing a common feeding site on different hosts were more closely related than those sharing the same …
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Improving ungulate habitat in a region undergoing rapid energy development: consequences for songbirds and small mammals
… and roller-chop treatments) for reducing pinyon-juniper woodlands to promote mule deer habitat. I use this experimental design to additionally test the initial effects of these treatments on birds and small mammals, and to evaluate selection of habitat components in treatments by birds and …
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Effect of enhanced nutrition during winter on the Uncompahgre Plateau mule deer population
… Biologists hypothesized that poor quality of the pinyon (Pirns edulis) and juniper (Juniperus osteosperma) winter range was the primary cause of the observed decline. In contrast, many of the Colorado Division of Wildlife’s (CDOW) constituents hypothesized that high predation rates were keeping …
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Ecology of mule deer on the Pinon Canyon Maneuver Site, Colorado
… and females only in the fall. Females preferred pinyon-juniper woodland in all seasons, and shrub grassland in winter, summer and fall; proportional use of woodland/open grassland and shrub/open grassland edge was greater than proportional availability. Males preferred pinyon-juniper woodland and …
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Patterns of habitat, microhabitat, and body size distribution in a lizard assemblage.
… stansburiana) that are commonly syntopic in the pinyon-juniper woodland habitat on the elevated mesas of western Colorado. Lizard populations were censused within Colorado National Monument, U.S.A., during the summer months of 1989, 1990, 1991, 1992, 2000 and 2001. Microhabitat characteristics …
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Artificial Night Lighting and Anthropogenic Noise Alter Animal Activity, Body Condition, Species Richness, and Community Structure
… pollution, both singularly and in tandem, on pinyon mouse (Peromyscus truei) activity and body condition. Using a full factorial study design allowed us to isolate the effects of both stimuli when acting alone as well as any potential interactions between the two when both were present. We …
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Habitat selection by the elegant trogon (Trogon elegans) at multiple scales.
… positively associated with cover by sycamore, pinyon, and juniper vegetation, and the abundances of three bird species. At the intermediate scale, radio-tagged trogons in the Huachuca and Santa Rita mountains used both upland and riparian areas, and selectively used sites with dense vegetation …
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Analysis of Dryland Forest Phenology using Fused Landsat and MODIS Satellite Imagery
… within 500 m MODIS extents. Colorado Plateau Pinyon Juniper displayed high amounts of temporal and spatial variability that justified the use of STARFM data, while the benefit to the remaining classes depended on the specific vegetation index and phenology metric. The third study expanded the …
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Effects of pretreatment tree dominance and conifer removal treatments on plant succession in sagebrush communities
… management. Juniper (Juniperus spp. L.) and pinyon (Pinus spp. L.) trees were reduced by prescribed fire and cutting at 10 sites across the western United State. Vegetation cover and density were measured on untreated and treated plots across a gradient of tree dominance index (TDI, defined …
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Mule deer response to military activity in southeast Colorado
… sampling for censusing mule deer in low density pinyon-juniper (Pinus edulis-Juniperus monosperma) habitat. Management recommendations included training restrictions during fawning season and in severe winters, as well as revegetating disturbed areas.
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Fire on the Mountain: Roasting Pits in the Sheep Range on the Desert National Wildlife Refuge
… including Black Brush, Mixed Shrub and Pinyon-Juniper communities. Experimental testing of rocks found in the Sheep Range determined that the local dolomite turns white when subjected to temperatures of 875° C and higher. Based on the experimental work I conducted, I reason that dolomite …
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Population-Level Differences in Pinus monophylla Whole-Plant Seedling Strategies Under Varying Precipitation Pulses
… under projected climate scenarios. Singleleaf pinyon pine (Pinus monophylla) is a dominant tree species in the Intermountain West, USA, that demonstrates intraspecific trait variation along multiple climatic gradients, most notably climatic water deficit and amount of summer precipitation. …
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Glycerol permeability in two species of Peromyscus
… to glycerol in two different populations of the pinyon mouse (P. truei). In addition to this population comparison, the glycerol permeabilities of two closely related species, P. truei and P. californicus, were investigated</p>
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