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 17 of 17 for “"canopy openness"”.
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Small Mammal Species Richness And Relative Abundance Across The Elevational Gradient And Microhabitats Of Pine Mountain, Eastern Kentucky
… Forest SNP (79%). From the redundancy analysis, canopy openness, number of Kalmia latifolia stems, number of rocks, leaf litter depth, and elevation explained the most variation in abundances of small mammals. Sorex fumeus was more abundant at microsites with deeper leaf litter and more rocks, …
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Urban trees and biodiversity in Cork city
… (light intensity and temperature) and canopy openness have with urban tree species. Microclimate data loggers were deployed at the base of all trees for each experiment and hemispherical canopy images were taken to determine canopy openness in Fitzgerald’s Park. In general, there were …
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The Fungal Connection: Characterizing the Ectomycorrhizal Community and Belowground Response to Restoration Treatments in Northern Mississippi.
… ECM fungal community, including litter depth, canopy openness, burn regimen, and soil compaction. Results indicate that the ECM fungal community is very diverse with 175 operational taxon units recovered from sequence data, 106 OTUs only found once. The fungal species had high site fidelity, …
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The Influence of Overstory Structure on Understory Light Availability in a Longleaf Pine (Pinus palustris Mill.) Forest
… photographs used to estimate weighted canopy openness and gap fraction were effective methods, but gap light index (GLI) also derived from hemispherical photographs performed better. Accuracy of daily %PPFD estimates using %PPFDovercast, weighted canopy openness, and gap fraction were …
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DISTURBANCE ECOLOGY OF THE SONADORA RIVER ROCK POOL INSECT ASSEMBLAGE AT LUQUILLO EXPERIMENTAL FOREST, PUERTO RICO
… volume, temperature, distance to river bank, canopy openness, and flooding disturbance. It was then hypothesized that the adult insects should be making oviposition choices that maximize offspring survival (preference-performance hypothesis, PPH). It was unclear if PPH was supported for …
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The effects of forest disturbance and fragmentation on fruit-feeding butterflies in Trinidad
… assemblage between the forest understorey and canopy, and certain species were found to be horizontally stratified from the forest edge. <br></br><br></br>No significant effect of breaks in a forest habitat to the dispersal of certain fruit-feeding butterflies was found, but for species which …
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Sapling growth and recruitment as affected by flooding and canopy gap formation in a river floodplain forest in southeast Texas
… data collected since 1980 to investigate how canopy disturbance interacts with chronic understory disturbance to determine regeneration patterns. I reconstructed flooding history using a combination of river gauging, a local water-level recorder, and contour maps. 1979 was an extreme flood …
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The Influence of Selection Silviculture Biomass Harvesting on Soil Carbon, Nutrients, and Respiration in a Northern Mixed-Deciduous Forest
… organic C (SOC/DOC), K+, and NH4+. Increased canopy openness and soil temperatures accounted for 34-41% of elevated FCO2. Woody debris inputs and SOC/DOC losses correlated to higher autumn FCO2 rates and NH4+ losses, while harvested tree biomass correlated to lower summer rates and higher …
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Inhibition of Canopy Tree Seedlings by Thickets of <I>Rhododendron maximum</I> L. (Ericaceae) in an Eastern Deciduous Forest
… regeneration of many understory plants including canopy tree seedlings. By effectively lowering the survivorship of woody species trying to establish within thickets, <I>R. maximum</I> could influence stand level regeneration patterns and ultimately the community structure of these deciduous …
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Testing The Peninsula Effect: Does It Affect Freshwater Crustaceans Inhabiting Ephemeral Wetlands On Florida's Ridges?
… hydroperiod, total transmitted light and canopy openness. Crustacean species were identified to the lowest practical taxonomic level (typically species) and recorded as present or absent. A total of 53 different crustaceans were identified, including 41 cladocerans, 10 copepods, and 2 …
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Metapopulations and metacommunities in dry forest openings in southern Illinois
… habitats from the surrounding forest based upon canopy openness. Approximately 30% of the species fit the metapopulation model, and the metacommunities at each of the sites exhibited a Clementsian pattern, characterized by groups of co-occurring species that replace each other over the region due …
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Detection of Mortality in Tropical Forests Using Remote Sensing: From Treefall Gaps to Large Disturbances
… tropical forest of the Amazon. Data of gap area, canopy openness (CO), leaf area index (LAI), coarse woody debris (CWD) and tree mortality were collected in both plots. The relation between CO and LAI of gaps coupled with high resolution satellite images IKONOS-2 was investigated using …
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Ground Layer Response to Disturbance in the Pine-Dominated Eastern Foothill Region of West-Central Alberta, Canada
<p>The canopy cover of the Pinus contorta forests of west-central Alberta, dictates colonization of the forest floor ground layer. This dynamic ground layer is a mosaic of feather mosses and reindeer lichens in a system driven by disturbance. In this project, anthropogenic was used to control …
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Large-area forest assessment and monitoring using disparate lidar datasets
… tree height data to generate a large-area canopy height model. A simple linear regression model was developed using two lidar-based metrics as predictors: the 85th percentile of heights of canopy first returns and the coefficient of variation of the heights of canopy first returns. This …
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Reconstruction of seed dispersal via modeling, seedling recruitment, and dispersal efficiency of Hemiphaga novaeseelandiae in Vitex lucens and Prumnopytis ferruginea in New Zealand
… vector behaviour in native New Zealand forest canopy tree species that have large fruit by asking: (i) What are the local seed ‘shadows’ (distributions) and seedling patterns in Prumnopytis ferruginea (miro, Podocarpaceae, dioecious) and Vitex lucens (puriri, Verbenaceae, hermaphroditic), for …
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Urban Restoration Ecology: Investigating environmental change, ecological function, and enrichment planting
… regeneration, including formation of a forest canopy that reduces competition from herbaceous exotic weeds and stabilizes the microclimate. The second study explored the connection between ecological function and forest structure. Specifically, it investigated whether nutrient cycling in the …