Global ETD Search
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 179 for “"woodlands"”.
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Wildlife Response to Stand Structure of Green Ash Woodlands
… sampled over two years in two types of green ash woodlands in extreme northwestern South Dakota. Woodlands referred to as closed canopy stands consisted of dense stands of various species of trees and shrubs in different size and age classes. Woodlands referred to as open canopy stands had sparse …
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Ecology and Conservation of Birds of Pinyon -Juniper Woodlands
… 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 2005, a wet year, I studied avian nesting success on study …
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Governance Attributes Influencing the Expansion of Birch Woodlands in Iceland
Þessi rannsókn skoðar stjórnunartengda þætti sem hafa áhrif á endurheimt birkiskóga á Íslandi, með sérstakri áherslu á sögulegt samhengi og samsetningu stjórnkerfis birkiskóga og samskipti innan þess, á þeim tíma sem rannsóknin var framkvæmd. Áður fyrr voru birkiskógar útbreiddir um allt land, en …
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Effects of Urbanization on the Avian Community of Oak Woodlands
… difference here. The focus of this study on oak woodlands may be responsible, as a single habitat type is far more consistent than the whole of an urban-rural matrix. Additionally, the urban birds typically found in cities across the world do not typically inhabit woodlands, freeing up resources …
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Evaluating the ecosystem services and disservices provided by Mediterranean woodlands
… flow was less than expected, indicating that non-woodlands adjusted to increasing aridity by reducing their water use. This agrees with the findings of the previous chapter, which show that increasing catchment aridity can reduce the effects of vegetation on river flow, by reducing transpiration …
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Response of Pinyon-juniper woodlands to fire, chaining, and hand thinning
… (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 Pinyon-juniper …
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Post-fire vegetation and bird habitat use in piñon-juniper woodlands
Global climate change has caused fire activity and behavior to shift from historical norms due to hotter and drier conditions. Although the ecological effects of changing fire regimes have been explored in many systems, the resilience of some forest types, such as piñon-juniper, are often …
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Community Ecology Of Soil Microbes In Southeast Usa Oak-Pine Woodlands
Soil microbial communities can have important effects on plant growth and plant community ecology; however, the relationships between trees and soil microbial communities are still relatively poorly understood. Here i examine several of these relationships. Chapter 1 examines how ecological …
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Modeling canopy foliar traits and disturbance interactions in central Texas woodlands.
The present study examines canopy foliar traits and their interactions with the greater ecosystem at multiple scales. Leaf mass/area ratios, nitrogen, and phosphorus were measured and were shown to correlate with relative light levels in some species. Leaf nutrition is used as the basis for a leaf …
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The manipulation, introduction and ecology of field layer communities in broadleaved woodlands
… to enhance the herb communities of secondary woodlands, particularly recently developed urban woodlands, by manipulating existing field layers, enriching them through the introduction of woodland herbs, and by examining aspects of the ecology of selected species which could contribute to their …
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Evaluating dry woodlands degradation and on-farm tee management in kenyan drylands
Tropical dry forests and woodlands are comprised of trees that are specially adapted to the harsh climatic and edaphic conditions, providing important ecosystem services for communities in an environment where other types of tropical tree species would not survive. Due to cyclic droughts which …
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Avian Occurrence in Woodlands and Grasslands on Public Areas Throughout Eastern South Dakota
… in eastern South Dakota using belt transects. Woodlands were surveyed once during either the 1997 or 1998 breeding season. Woodlands were surveyed completely with the exception of extremely large (> 7 5 ha) tracts ( < 1 % of the sample). A total of 85 different avian species were detected in …
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Ecology of box mistletoe Amyema miquelii dispersal in pink gum Eucalyptus fasciculosa woodlands.
… of box mistletoe Amyema miquelii in eucalypt woodlands of south-eastern Australia may have resulted from the suppression of canopy fires, a reduction in herbivory by possums, and through environmental change, an improvement in conditions for mistletoe dispersal and establishment. In the Mount …
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Spatio-temporal change in riparian woodlands of the Kruger National Park: drivers and implications
Verbal accounts, supported by limited ground-based and satellite images, reveal decreasing riparian woodland and a loss of large trees along the rivers of the Kruger National Park (KNP) over the last century. These habitats occupy a tiny fraction of the park’s surface area but fulfil critical …
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People, Places, and Plants: An Appraisal of Subsistence, Technology and Sedentism in the Eastern Woodlands
… human populations inhabiting the Eastern Woodlands by considering how increasing reliance on cultivated foods during the Holocene led to economic circumstances in which investment in the specialization of plant-food processing tools was beneficial. It further identifies that tool …
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The influence of soil fertility and light intensity on field layer development in urban secondary woodlands
… on field layer development in urban secondary woodlands with an introduced ground flora, with the aim of contributing towards ground flora enhancement methodology and sympathetic secondary woodland management. The investigation was based on a series of complementary field and greenhouse …
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Diversity, Ecology, And Conservation Of Bird Communities Of Polylepis Woodlands In The Northern Andes Of Peru
Montane birds are sensitive to a wide variety of human activities, among which climate change is of special concern. Among the most diverse and specialized montane bird communities is that of Polylepis forests in the High Andes (> 3,500 m). Unfortunately, the ecology of birds associated with …
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