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 33 for “"forest disturbance"”.
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The effects of forest disturbance on stream stability
… stability of stream ecosystems in response to forest disturbance and subsequent succession. Stability was defined as the ability of streams to retain particulate organic matter and nutrients during storms. I hypothesized that forest streams are least stable during the intermediate stages of …
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Avifauna and Anthropogenic Forest Disturbance in Two Biodiversity Hotspots.
… thesis is to examine the impact of anthropogenic forest disturbance on avifaunal communities in two biodiversity hotspots- lowland tropical forest in the Lambusango Forest Reserve within the Wallacean archipelago and Neotropical cloud forest in Cusuco National Park, Mesoamerica. Both these study …
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Measuring tropical forest disturbance and regrowth with spaceborne lidar
The world’s tropical forests are vulnerable, facing threats of deforestation and anthropogenic disturbances, but they are also the site of enormous potential for forest growth. While these changes in tropical forest frontiers are widely agreed to have major implications for global carbon fluxes and …
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Effects of forest disturbance on shredder production in headwater streams
Effects of forest disturbance on leaf shredding aquatic insects were investigated by comparing leaf biomass and shredder production in disturbed versus reference forest streams. Benthic samples were collected monthly in 3 streams in a mature hardwood reference forest and 3 streams in an 11-year-old …
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The effects of forest disturbance and fragmentation on fruit-feeding butterflies in Trinidad
… the use of tropical butterflies as indicators of forest disturbance, fragmentation and forest recovery. The disturbance level of habitats was found to be characterised by the rate of the fraction of species accumulated, with species in undisturbed habitats accumulating more slowly. Undisturbed …
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Forest disturbance, mosquito vector ecology and La Crosse virus dynamics in southwestern Virginia
The influence of forest canopy disturbance (FCD) on La Crosse virus (LACV), leading cause of US pediatric arboviral encephalitis, is critical to understand in landscapes where forests are periodically harvested. Southwestern Virginia is part of an emerging focus of this interior forest bunyavirus. …
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Spatio-temporal patterns of forest disturbance in western North America: implications for forest resilience
Globally, forest disturbance activity is changing in response to changing climate. As disturbance regimes change, concerns have been raised that the mechanisms of forest resilience (i.e., the capacity of forests to tolerate disturbance) may begin to break down. To successfully monitor, forecast, …
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Insect-Induced Forest Disturbance Impacts on Select Water Quality Parameters in a Closed Drinking Water Reservoir
Biotic forest health conditions, inputs of abiotic factors and timing of precipitation and river inflows impact drinking water reservoirs. Natural organic matter (NOM) directly impacts water treatment process effectiveness and is identified as an emerging contaminant of concern. Few studies have …
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The impact of forest disturbance on the fine root system of a tropical forest on Sulawesi, Indonesia
Selektiver Holzeinschlag und die Konvertierung von Wald in Waldfeldbausysteme sind an den Regenwaldrändern in Süd-Ost-Asien weit verbreitet. Diese Störung des Waldes führt zu einer nachhaltigen Veränderung der Bestandsstruktur und damit zu veränderten Ökosystemprozessen, einschließlich des …
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Land snail species diversity and composition between different forest disturbance regimes in central and eastern Kentucky Forests
… land snails can be susceptible to anthropogenic disturbance and habitat fragmentation. Because of this, old-growth forests have the potential for being premiere habitat for these organisms, and snails have the potential to be good indicators of old-growth habitats. This study compared land snail …
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Response of Breeding Birds to Forest Disturbance in the Arkansas Ozarks: Impacts of Uneven-Aged Management, Ice Damage, and Woodland Restoration
<p>Forests of the Ozarks are important breeding grounds for many bird species, each with specific habitat requirements. Natural and anthropogenic disturbance events can alter vegetational structure of forests, thereby influencing communities of breeding birds. The objectives of my study were to …
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Carabid Beetle Ecology as a Function of Disturbance in Temperate and Tropical Forests
Ecological disturbance is an episodic event which causes temporary disruption to components integral to structure and function of an ecosystem. With the majority of today’s forests recovering from past disturbance, knowledge of the changes and patterns of forest species in relation to disturbance …
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Detection and characterization of forest disturbances in California
Natural and anthropogenic forest disturbances are a major influence on the global carbon cycle, with the local and global impacts of a disturbance event depending in large part on the timing, intensity, and cause of the disturbance. With some disturbance agents expected to increase in frequency and …
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Using Unmanned Aircraft to Provide Near Real-Time Updates of Biomass, Forest Structure and Land Use in the Western Amazon
… expensive or labor-intensive inventory methods. Forest carbon is a key uncertainty in the global carbon cycle and is important for carbon conservation schemes. State-of-the-art techniques in forest carbon monitoring typically involve the use of accurate but costly manned aircraft to estimate …
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Future Forests of Bainbridge Island; Climate Change Vulnerability and Continuing Progressive Management
Forests continue to be of immense significance to Bainbridge Island’s sense of place, as well as to supporting essential functions in this eco-region. This thesis process investigated, evaluated, and compiled conditions of three stratified sites across Bainbridge Island; presents a vulnerability …
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The effects of habitat disturbance, host traits, and host physiology on patterns of gastrointestinal parasite infection in black howler monkeys (Alouatta pigra)
Anthropogenic forest disturbance associated with the conversion of forest into monocultures for agricultural production or cattle ranching, and the increased human presence linked to wood extraction and selective logging, can alter host-parasite dynamics and increase the risk of infectious diseases …
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Spatiotemporal Informatics for Sustainable Forest Production Utilizing Forest Inventory and Remotely Sensed Data
… for assessing the status and trends of forests, trees, their products, and their services. Techniques for using readily available data such as the Forest Inventory and Analysis (FIA) database and output from forest disturbance detection algorithms derived from Landsat data, such as …
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Identifying Forest Conversion Hotspots in the Commonwealth of Virginia using Multitemporal Landsat Data and Known Change Indicators
… starts within the Commonwealth of Virginia's forests. Individual NDVI images were stacked by year for the years 1995-2011 and the yearly maximum for each pixel was extracted, resulting in a 17-year image stack of all yearly maxima (a 98.7% data reduction). Using location data from housing …
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Linking Hydrological Processes With Water Resource Insights Through Synthesis of Big Data and Physics-Based Modeling
… hydrology, including water supply forecasting, forest disturbance and management, climate change resilience, surface-groundwater interactions, and meadow restoration. Through these diverse study topics spanning the Sierra Nevada and Rocky Mountains, I demonstrate the synthesis of deductive and …
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