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 26 for “"mixed forest"”.
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Ecological Factors Influencing Infection Rates of the Birch Polypore Inonotus obliquus in the Laurentian Mixed Forest Province
… </em>spp<em>.</em>) trees in northern hardwood forests around the world, has been harvested intensively in recent years for its potentially medicinal properties. However, there is a dearth of ecological understanding of this fungus; even basic infection rates tend to be anecdotal or lack …
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Integrated analysis of relationships between 3D-structure, leaf photosynthesis, and branch transpiration of mature Fagus sylvatica and Quercus petraea trees in a mixed forest stand
Identifying the relevance of forest structure for stand photosynthesis and transpiration is one of the remaining challenges in plant physiological ecology. This thesis uses the historically new chances for the description of 3D-complexity of beech and oak forests that come along with the rapid …
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Timber growth and succession in the mixed evergreen forests of the southern Cape
… was developed for a 44ha southern Cape mixed evergreen forest compartment where the DBH's of all trees have been measured over a 15 year period. The central growth equation from another model for mixed forest was used and parameters adjusted to cater for the southern Cape forests. The …
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Effects of soil nutrient availability on the development of tropical monodominance and subordinate species composition in montane forests
Although tropical forests are well known for harbouring some of the highest levels of plant diversity in the world, natural areas occur where a single tree species dominates the forest stand. The presence of these monodominant forests therefore represents an unusual and intriguing phenomenon. …
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Analysis of the One-Horned Rhinoceros (Rhinoceros Unicornis) Habitat in the Royal Chitwan National Park, Nepal.
… eight land cover types: wetland, sand, water, mixed forest, sal forest, agriculture, settlement, and grassland. This image was converted into habitat suitability maps using cover, food, and water. The rhinoceros prefers grassland habitat with oxbow lakes and closed canopy during the monsoon …
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Estimating forest attributes using laser scanning data and dual-band, single-pass interferometric aperture radar to improve forest management
… ascertain whether leaf area index in temperate mixed forests is best estimated using multiple-return airborne laser scanning (lidar) data or dual-band, single-pass interferometric synthetic aperture radar data (from GeoSAR) alone or both in combination (Chapter 4). In situ measurements of LAI, …
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An Object-Oriented Approach to Forest Volume and Aboveground Biomass Modeling using Small-Footprint Lidar Data for Segmentation, Estimation, and Classification
… approach to deciduous and coniferous forest volume and above ground biomass estimation, based solely on small-footprint, multiple return lidar data. The study area is located in Appomattox Buckingham State Forest in the Piedmont physiographic province of Virginia, U.S.A, at 78°41’ W, …
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The summer fleshy fungus flora of the Gorge of Carp Creek, University of Michigan Biological Station, with a comparison of the years 1961 and 1962
… a larger crop of sporocarps and more species. Mixed forest of conifers and hardwoods produced the greatest number of species. Pieca-Thuga bog, Betula forest, and Alnus-Typha swamp produced the next larer number of species respectively.
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Habitat suitability modeling for Lontra canadensis in east Tennessee
… indicating a strong positive correlation between mixed forest land cover and otter presence. This information can be expounded on with further field testing and utilized by state officials in managing wildlife. As river otters are indicators of stream ecosystem health, maintaining habitat that is …
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Tufted Titmice, Black-crested Titmice, and their Hybrids Occupy Different Habitats within their Hybrid Zone
… that transitions from closed-canopy deciduous forests in the east, occupied by TUTI, to arid and open woodlands in the west occupied by BCTI. Furthermore, the ecotone encompasses areas impacted by urban and suburban development. For the first objective of my study, I tested whether …
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Information privée, attraction conspécifique et sélection d'habitat chez la paruline couronnée (seiurus aurocapilla)
Across the world, forest harvesting is one of the human activities having the greatest impact on biodiversity. Many studies have been conducted to better understand these impacts in the hope of minimizing their consequences. In New Brunswick, one type of "partial harvesting" is increasingly being …
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Habitat preferences of the eastern fence lizard, Sceloporus undulatus, in southwestern Virginia
… Landscape-level variables, southerly aspect and mixed forest type, distinguished lizard-centered from random sites. Hatchlings were associated with relatively high temperature at perch height (23 °C), relatively high amounts (per 1- m2) of coarse woody debris (15%) and bare ground (15%), and …
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Land Cover of Virginia From Landsat Thematic Mapper Imagery
… improvements are presented. Overall deciduous forest was the most common land cover in Virginia. Herbaceous areas accounted for 20% of the land area, which was the second largest. Mixed forest and coastal wetlands were the cover types with the least area, each under 3%.
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Evaluation, assessment, and determination of risk to high trophic level piscivores in the Mid-Atlantic: A spatial, biological, and comparative case study of mercury in Virginia bald eagle populations
… relate metrics such as the percent of deciduous forest, percent of mixed forest, percent of pasture, and percent of wetland to measured blood mercury concentrations. We also found that the best models were produced using the USGS HUC 12 watersheds (the smallest watershed produced by the USGS). …
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Is Chir Pine Displacing Banj Oak in the Central Himalaya? Socioeconomic Implications for Local People and the Conservation of Oak Forest Biodiversity
… Five sites with three different types of forests (banj oak, chir pine and mixed oak-pine) were sampled to compare the diversity of their vegetation and to assess the impact of this ongoing conversion on biodiversity. Soil samples collected from oak and pine forests were analyzed and …
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Premigratory movements of a long-distance migratory species: the Wood Thrush (Hylocichla mustelina)
… growth and sapling stage sites at the edge of forested areas [52%], (2) gypsy moth (Lymantria dispar) damaged deciduous forest [21.8%], (3)Virginia pine (Pinus virginianus) forest that had a heavy understory of young deciduous trees and an open canopy [15.6%], and (4) mature mixed forest …
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Satellite Microwave Remote Sensing of Boreal-Arctic Land Surface State and Meteorology from AMSR-E
… (AMSR-E) on the Aqua satellite for eight Boreal forest and Arctic tundra biophysical monitoring sites across Alaska and northern Canada. Daily vapor pressure deficit is determined by employing AMSR-E daily maximum/minimum air temperature retrievals. The seasonal pattern of microwave emission and …
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Satellite Microwave Remote Sensing of Boreal-Arctic Land Surface State and Meteorology from AMSR-E
… (AMSR-E) on the Aqua satellite for eight Boreal forest and Arctic tundra biophysical monitoring sites across Alaska and northern Canada. Daily vapor pressure deficit is determined by employing AMSR-E daily maximum/minimum air temperature retrievals. The seasonal pattern of microwave emission and …
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Interactive effects of hemlock mortality and nitrogen availability on nutrient pools and fluxes in the southern Appalachian Mountains
The impacts of exotic insects and pathogens on forest ecosystems are increasingly recognized, yet the factors influencing the magnitude of effects remain poorly understood. Eastern hemlock (Tsuga canadensis) exerts strong control on nitrogen (N) dynamics, and its loss due to infestation by the …
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Establishment, Mortality and Growth of Recruits in an Experimentally Disturbed Piñon-Juniper Woodland
… extreme drought. There is a question whether forests can fully recover from these events to their previous state, or whether they are succeeded by more arid woodlands, such as juniper savanna. To better understand the process of vegetation recovery from disturbance, we imposed an experimental …
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