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.
Results
Showing 1 to 20 of 47 for “"Forest Fragmentation"”.
-
Effects of Forest Fragmentation on Central Amazonian Bird Demography
… in cleared and disturbed areas. Regenerating forest facilitates bird dispersal within degraded Amazonian landscapes and may tip the balance in favor of persistence in previously depauperate habitat patches. Despite the potential value of Amazonian second growth, we lack comparisons of …
-
Lyme Disease and Forest Fragmentation in the Peridomestic Environment
… reservoir. Both depend on the existence of forest-herbaceous edge-habitats, as well as warm summer temperatures, mild winter lows, and summer wetness. While many studies have investigated the effect of forest fragmentation on Lyme, none have made use of high-resolution land cover data to do …
-
Geospatial Analysis of Forest Fragmentation and Connectivity in Virginia
This research evaluated the extent to which forests in Virginia have either become fragmented (disconnected) and/or connected over a ten year time period. The study analyzed the accuracy of forest fragmentation analysis depending on the spatial resolution of the satellite imagery used. This …
-
Design and implementation of Web-based GIS for forest fragmentation analysis
… and limitations of current web GIS software for forest fragmentation information and analysis functionality were investigated using Landsat Thematic Mapper data of 1987 to 1999 for a test site in northern West Virginia. ESRI's ArcIMS technology was used to build a Web-based forest fragmentation …
-
Effects of forest fragmentation on the demography of ovenbirds (Seiurus aurocapillus) in the boreal forest
… commercial harvesting, and in contiguous boreal forest of Saskatchewan. Various survey techniques demonstrated that ovenbirds were less common in small, isolated forest patches in fragmented landscapes relative to contiguous forest. Male ovenbirds in fragmented landscapes (84 to 87% paired) had a …
-
'Islands' in an island: multiscale effects of forest fragmentation on lowland forest birds in Taiwan
… human population has caused severe lowland-forest loss and fragmentation in the western coastal plain in Taiwan over the past centuries. The goal of this study is to explore the multiscale impacts of forest fragmentation on species richness and community composition of lowland-forest birds …
-
Forest fragmentation mapping, change detection, and gas well site identification in remotely sensed imagery: the role of spatial resolution
… for statistically significant changes in the forested class between the 2004 and 2010 classifications. Landscape metrics derived from random quadrats sampled across the entire county produced results that differed from quadrats sampled from high and low well density areas. Changes in metrics …
-
Dynamics of Forest Cover Extent, Forest Fragmentation and Their Drivers in the Lake Victoria Crescent, Uganda From 1989 to 2009
Despite the important values forests play in the tropics, sustainable forest management still remains a challenge as manifested through continued forest loss. The objective of this study was to provide information on the dynamics of forest cover and their drivers vital for enhancing sustainable …
-
Ecological and Anthropogenic Influences on a Sentinel Species' Gut Microbiome
… augmented challenges due to increased rates of forest fragmentation. Among these challenges are implications on the nonhuman primate gut microbiome. Wild Argentine black and gold howler monkeys (<em>Alouatta caraya</em>) are listed as “least concern” with a population that is decreasing. Despite …
-
A Holistic Analysis for Spatiotemporal Interdependencies of Deforestation, Forest Degradation and Landslide Susceptibility in NE Iran
Various biotic and abiotic agents are changing forests. Prolonged human activities substantially could cause not only different changes in forests but also could accelerate natural hazards in the Anthropocene. Despite several remote sensing-based research in forest changes, there is a need for a …
-
The Effects of Land Cover Change on the Spatial Distribution of Lyme disease in Northern Virginia Since 2005
… to determine if a correlation exists between forest fragmentation, suburbanization, and cases of human Lyme disease as has been demonstrated in other Lyme endemic regions in the United States. Few studies have focused specifically on northern Virginia when considering the impacts of land cover …
-
Assessing processes of long-term land cover change and modelling their effects on tropical forest biodiversity patterns – a remote sensing and GIS-based approach for three landscapes in East Africa
… assessment of changes in different tropical rainforest areas in East Africa. In order to assess the effects of the derived changes in land cover and forest fragmentation, the study made use of spatially explicit modelling approaches within a geographical information system (GIS) to extrapolate …
-
Riparian Forest Width and the Avian Community in a Greenbelt Corridor Setting
The forest avian community of the Ray Roberts Greenbelt (Denton Co., Texas) was characterized for two years using point count station sampling, from fall 1998 to summer 2000. Richness data for both breeding seasons were correlated with two-spatial metrics: width of the riparian forest and distance …
-
Effects of Diameter-limit and Two-age Timber Harvesting on Songbird Populations on an Industrial Forest in Central West Virginia
<p>Many studies examining forest fragmentation effects on songbirds have been conducted in landscapes significantly altered by urbanization or agriculturalization rather than forested landscapes. There is some evidence that forest fragmentation due to timber harvesting has different effects on bird …
-
Vertebrate Survey of Rocky Fork Wildlife Management Area, Unicoi and Greene Counties, Tennessee.
<p>The most prominent cause of habitat fragmentation is intensification of human land use. Negative effects of large-scale forest fragmentation have been documented in most vertebrate classes. The inherent problem in <em>directly</em> documenting effects lies in our ignorance of historical …
-
THE IMPACT OF MICROCLIMATE ON BRANCH COLONIZATION BY NEOTROPICAL CERAMBYCID BEETLES
… great diversity of insects found in tropical rainforests. Due to differences in both biotic and abiotic factors, different strata of the forest provide different habitats for insects. A previous study in French Guiana revealed that wood-boring cerambycid beetles preferentially colonized branches …
-
Lyme Disease Emergence in Virginia: An Examination of the Demographic and Environmental Variables Correlated to the Spatial Pattern of Disease Incidence
… measured inside each census tract, measures of forest fragmentation, and measures of land cover interspersion inside state census tracts. Analysis was carried out using a spatial Poisson regression model. Of the original 15 variables, 10 were significantly correlated to Lyme disease. The six …
-
The Introduction of a Chip Mill: Effects on Deforestation Rates and Timber Harvest Locations in Southeast Missouri
… regarding the impact of this technology on forest environmental quality. In Missouri, the introduction of chip mills caused enough concern that the governor organized a committee to research the possible implications of this type of wood processing. This study investigates one of the chip …
Page 1 of 3