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 21 for “"tree species composition"”.
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Canopy Characteristics Affecting Avian Reproductive Success: The Golden-cheeked Warbler
… populations. Additionally, different avian species respond differently to the surrounding environment at different spatial scales. Thus, multi-scale studies on bird abundance and reproductive success is necessary for evaluating the effects of habitat alterations. The golden-cheeked warbler …
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Forest Composition, Regeneration, and Tree Quality in the Southern Appalachian Mountains of Virginia: Selective Cutting vs. Shelterwood
… The specific attributes compared were: (1) tree species composition; (2) seedling, sapling, and overstory tree density; (3) overstory tree quality and size; (4) sapling crown class; and (5) canopy closure. Seedlings, saplings, and overstory trees were sampled at 22 SC and 28 SW sites. …
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The Carbon Density and Species Diversity of Myanmar's Tropical Forests
… focuses on evaluating how carbon storage and tree species composition in Myanmar's tropical forests are affected by its management history and environmental factors. Chapter 1 introduces the ecology of Myanmar’s forests. It describes historical and current forest management systems and the …
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Positional behavior and habitat use of Peters’ Angola black and white colobus monkey (Colobus angolensis palliatus) in structurally distinct areas of the Diani Forest, Kenya
… differences were quantified with regard to tree species composition, tree size, and diversity indices. The behavior of adult males and females was sampled instantaneously at 3 minute time intervals.Overall activity budgets and strata use differed significantly between all troops while …
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The Historic Fire Return Interval and the Ecological Effects of Fire Suppression on Montane Longleaf Pine Dominated Ecosystems in Northwestern Georgia.
… and land use conversion. In an absence of fire, tree species composition of frequently burned xeric ecosystems progressively becomes more mesic and fire-intolerant (<em>i.e.</em> mesophication). The change in the species composition and historic fire frequency of a montane longleaf pine ecosystem …
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Reconstructing NDVI Time Series from Landsat and MODIS and Developing a Species-Specific Validation Dataset for Vegetation Classification in Frontenac Provincial Park
… the timing of vegetation green-up and species composition in forests is critical for monitoring ecosystem dynamics and assessing how forests are shifting under climate change. This thesis investigates spring start of season (SOS) using remote sensing and develops a field-based species …
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Tree community assembly and biogeochemical processes along an elevational gradient in western Panama
… and biotic conditions are expected to influence tree diversity, floristic composition, nutrient and C cycling. My dissertation evaluates how edaphic factors, climate, and mycorrhizal associations drive tree community assembly, C storage, and biogeochemical processes along environmental gradients. …
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EVALUATING THE PERFORMANCE OF BIOMETRIC APPROACHES FOR VERIFICATION AND MONITORING IN COMMERCIAL FOREST CARBON ACCOUNTING
… baseline derived from forest inventories and species-specific allometric models. However, stock-centric carbon baselines fail to capture all carbon sources and sinks, and dynamic meteorological conditions drive carbon uptake and forest growth. A combination of high temporal and spatial …
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Ecological and taxonomic studies of the Russulaceae and other ectomycorrhizal Basidiomycetes in the high-elevation forests of the southern Appalachians
Temperate and boreal fungal floras indicate that species of the Russulaceae (the genera <i>Russula</i> and<i>Lactarius</i>) are among the dominant ectomycorrhizal fungi in forest communities. The contribution of the Russulaceae to the communities of ectomycorrhizal Basidiomycetes fruiting in red …
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Missing baseline information for British Columbia's forests : can timber cruise data fill some gaps?
… Mean densities for live and standing dead trees by diameter class, total live and dead trees, functional snags, large trees, tree species composition, coarse woody debris, and a number of qualitative indicators were analyzed. Results indicate that similarities exist between several …
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Bryophyte and macrolichen diversity of the Purdiaea nutans forest in southern Ecuador and its relationship to soil, climate and vegetation structure
… nor the epiphytic bryophyte and macrolichen species richness or composition were affected by the unusual tree species composition, but instead represent typical upper montane ridge communities of the region. Distribution of bryophytes and Macrolichens is primarily determined by differences in …
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GREAT APE CONSERVATION IN THE MATRIX: INVESTIGATING THE SOCIO-ECOLOGICAL RESPONSES OF CHIMPANZEES LIVING IN A FOREST-FARM MOSAIC, UGANDA
… as forest-farm mosaic landscapes. Understanding species’ socio-ecological responses to anthropogenic disturbances is essential for developing targeted strategies to ensure their survival in these habitats, particularly where conservation conflicts have arisen. This study investigates the …
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Nocturnal roost tree, roost site and landscape characteristics of Carnaby's Black-Cockatoo (Calyptorynchus latirostris) on the Swan Coastal Plain
… information on communal roosting in parrot species of Western Australia and other parts of the world. Carnaby’s Black-Cockatoo is an endangered species that forms large nocturnal communal roosts, and for this reason they are an ideal model species to test the characteristics or factors that …
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Entwicklung von Baumartenzusammensetzung und Struktur der Wälder vom Schwarzwald bis auf die Schwäbische Alb : mit besonderer Berücksichtigung der Buche
Vor etwa 2 000 Jahren - bei weitgehend mit heute vergleichbarem Klima und noch geringer menschlicher Einflussnahme - dominierte die Buche (Fagus sylvatica) in den Wäldern Mitteleuropas. Diese Wälder wurden durch Rodungen, vielfältige Nutzungen und Wiederaufforstungen sehr stark verändert. <br>Ziel …
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Exotic Species Invasion and Biodiversity in Bangladesh Forest Ecosystems
Both, biological invasion by exotic plant species and biodiversity including spatial patterns and drivers are two major issues in tropical forest ecosystems. This dissertation deals with these two issues in a tropical forest ecosystem in Bangladesh. Considering the first issue, it comprises two …
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The Assessment of habitat condition and consevation status of lowland British woodlands using earth observation techniques.
… Woodland condition can be described in terms of compositional and structural attributes (e.g. overstorey, understorey, ground flora), evidence of natural turnover (e.g. deadwood and tree regeneration), andanthropogenic influences (e.g.disturbance, damage). Woodland condition assessments are …
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Population Ecology and Foraging Behavior of Breeding Birds in Bottomland Hardwood Forests of the Lower Roanoke River
… differ in hydrology, forest structure, and tree species composition. I quantified foraging behavior with focal animal sampling and continuous recording during foraging bouts. I measured two aspects of foraging behavior: 1) prey attacks per minute, using four attack types (glean, sally, …
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Avian assemblages and Red-eyed Vireo nest survival within mineland forest
… of aggressive groundcovers that inhibit native species colonization. Under these conditions, succession is arrested. Within landscapes that are fragmented by traditionally reclaimed surface mines, forest patches are smaller and forest cover on the landscape scale is reduced. As a result, forest …
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Quantifying water use by temperate deciduous forests in South Korea : roles of species diversity, canopy structure, and complex terrain
… priority. The ongoing shift from coniferous to species-rich deciduous forests due to a changing government policy and the anticipated changes in future climate, associated with increasing amount of rainfall and temperature will also impact forest water use, calling for an urgent need to …
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Potential of above- and below-ground coarse woody debris as a carbon sink in managed and unmanaged forests
… conditions as well as similar tree species composition. In each forest, the C pools of the forest floor, the mineral soil and the CWD as well as their turnover times (TTs) or disappearance times (in case of CWD) were investigated. The unmanaged forests were withdrawn from …
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