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 30 for “"forest edge"”.
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Investigation of horizontal meteorological structures in comparison to turbulent structures at a forest edge
Forest ecosystems play a key role in the Earth's carbon cycle, as their uptake of carbon dioxide is largest in the terrestrial biospheres (CO2 sink). Despite a vast number of ecological studies about forest ecosystem, there are still outstanding issues about prevailing meteorological conditions, …
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The influence of aspect and forest edge effects on the ecology of the wood ant, Formica rufa L. (Hymenoptera: Formicidae)
… ecological processes through exposure to edge effects, is detrimental to many taxonomic groups, including insects. This research aimed to determine the influence of edge effects on the ecology of the wood ant, Formica rufa L. through an intensive study of a single site in Northamptonshire. …
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Maximum Entropy Modeling of Indiana Bat (Myotis Sodalis) Maternity Roost Habitat
… 6 environmental parameters (aspect, distance to forest edge, distance to stream or river, elevation, percent tree canopy, and slope) were used as input variables for a MaxEnt model of species distribution. I used ENMTools to identify which analysis features produced the best MaxEnt model for this …
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Keeping it cool: mammal responses to microclimatic variation in disturbed Indonesian lowland forest.
The combined impacts of deforestation, forest fragmentation and climate change will push many mammal species towards extinction, unless appropriate long-term conservation measures are implemented. While most mammal conservation projects focus on protecting remaining primary habitat, it is also …
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Impact of clearcutting on indigenous mammals of southwest Virginia
… were investigated; a control (60 to 100-yr-old forest) and 2 clearcuts (a 2-yr-old and 6- to 7-yr-old cut). These areas were located in the Craig Creek watershed of Montgomery and Craig Cos., Virginia. Two growing seasons after clear cutting it was evident that the shrub stratum had not caught …
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Wachstumsraten, Wachstumsmuster und Wachstumsstörungen tropischer Bäume: Analyse von Langzeiteffekten und kurzfristigen Störungen mit Hilfe von Jahrringstudien
… data on understanding some aspects of tropical forest dynamics and ecology. In species that produce annual tree rings, tree-ring analysis allows the most precise estimate of these two parameters. The present study assessed the age and radial growth rate of three Hymenaea species inhabiting four …
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Effects of prescribed fire on breeding forest songbird abundances in central and Southern Illinois
… trees such as maple (Acer spp.) in Midwestern forests is a challenge that forest managers must overcome to retain forests in their oak- and hickory-dominated status. Prescribed fire is one of the tools that forest managers use to meet this challenge. While the forest managers monitor the …
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Elephant endurance in Aceh: the effects of habitat disturbance and land cover change on the conservation of Sumatran elephants in Aceh, Indonesia
… are analyzed and evaluated. The impact of deforestation on the prevalence of elephants living in isolated subpopulations scattered across Sumatra was addressed by analyzing the spatial patterns of deforestation and habitat use of elephants. Deforestation data was obtained from remotely sensed …
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The climatic significance of tropical forest edges and their representation in global climate models
… created in the clearance of tropical humid forests influence water exchange between remnant forest patches and the atmosphere, and, if so, how this affects regional and global water exchange. Fieldwork presented in this thesis ascertains whether the amount of water transferred to the …
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Soundscapes of Sumatra: an analysis of the susceptibility of vocal fauna to ecological edge effects within a historically disturbed lowland forest, Sumatra, Indonesia.
… 2000 and 2015, 128.4 million hectares of native forest were destroyed through deforestation. Although Indonesia still has one of the highest levels of biodiversity globally, it has seen an increase in deforestation due to increased land-use change. In highly degraded forest areas, edge effects in …
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Análise da composição e da distribuição geográfica da avifauna das restingas do Estado do Rio de Janeiro
… south-American distribution (85,31 %), Atlantic Forest endemics (14%) and study area endemics (0,69%). The dominance of widely distributed elements, those found at more than two morphoclimatic domains, shows that the studied avifauna is composed by generalists species, which use a great variety …
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Assessing the relationships between pollinator-friendly plantings and birds, bats and white-tailed deer on farms in the Coastal Plain of Virginia and Maryland
… activity of bats in 4 cover types, including forest trail, a forested pond edge, a crop field on forest edge, and a farmscaped wildflower plot, on the Eastern Shore Agricultural Research Extension Center in Painter, Virginia, from April 2017- November 2019 using acoustic detectors. Of total …
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Composição da avifauna em uma parcela de vegetação perturbada na Baixada, em Majé, Estado do Rio de Janeiro, Brasil
… There is a large proportion of fruit-eating, forest edge species and individuals, belonging to the suborder Oscines and to the superfamily Tyrannoidea. These groups more typically represent the avifauna of temperate zones. There is a greater proportion of species endemic to eastern Brazíl …
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Bald eagle habitat use on B. Everett Jordan Lake and Falls Lake, North Carolina
… roosting habitat at 2 scales; those of forest stands and individual roost trees. Eagles chose roost areas that were less dense, had less canopy cover, were closer to forest edges, and had larger trees than random forest areas (P < 0.05). Within roost areas eagles choose trees that were …
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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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Tracking Floral Visitation Using DNA Barcodes
… and 49 bumblebees (Bombus spp.) from a disturbed forest edge in Columbus, Georgia and analyzed their pollen loads using the plastid DNA barcode region rbcL. The identities of monospecific pollen loads were determined by comparing sequences to a local plant reference library containing 22 native …
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Primate crop raiding in Uganda: actual and perceived risks around Budongo Forest Reserve
… risk of primate crop raiding around Budongo Forest Reserve, northwest Uganda during 2004/2005. Weekly farm monitoring established that at least seven wild species damage crops. and primates (primarily baboons) are responsible for forty percent of all raids. The creation of risk maps using GIS …
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Social organisation, ecology and conservation of loris tardigradus tardigradus (lorisformes; primates)
… is a small nocturnal primate inhabiting the rainforests of Sri Lanka. This study provides new information on the natural history, social organisation and ecology of this endangered strepsirrhine, from which conservation action plans are derived. The study was conducted in Masmullakele, a 290ha …
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The Impact of Neighborhood-Based Processes on Demography and a Decline in Species Diversity in a Temperate Deciduous Forest
… Acer saccharum (Sugar maple), in a deciduous forest in central Illinois, U.S.A. during 1939--2001. First, the impact of density-dependence, interspecific competition, and disturbance on mortality and recruitment of tree species was evaluated. Second, neighbor-specific transition matrices and …
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Nesting and Brood Rearing Ecology of the Vancouver Canada Goose on Admiralty Island Southeast of Alaska
… also located. Twenty-two nests were located in forest habitat •. All forest nests were in association with vegetation similar to vegetation described for U.S. Forest Service classification of F4 and F5 (poorly drained) soil types. Mean clutch size was 4.4 ± 1.3 eggs. Mean egg length and width …
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