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 48 for “"deciduous forests"”.
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An experimental analysis of nest predation in eastern deciduous forests
… and frequency of nests, and the fragmentation of forests through alterations of the landscape and forest structure affect nest predation levels. I estimated predation levels using over two thousand natural translocated nests and on artificial nests baited with quail eggs placed in large eastern …
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Measuring Medicinal Nontimber Forest Product Output in Eastern Deciduous Forests
… role in the lives of people who rely on forests. An absence of data on the size of harvests, their location, and the economic value of NTFPs prevents effective management and full utilization by all stakeholder groups. We set out to measure one important NTFP sector -- the medicinal plant …
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Germination niche of Sardinian endemic species in mountain riparian deciduous forests
The Supramontes region and Gennargentu massif are two of the most interesting territories of Central Eastern Northern Sardinia. Riparian vegetation among mountainous waterways of these territories are mainly constituted by Alnus glutinosa with other associated taxa such as Taxus baccata, Ilex …
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Productivity and nutrient relations of trees in deciduous forests differing in tree species diversity
Die Effekte der Biodiversität auf die Ökosystemfunktionen von Wäldern werden mit steigendem Interesse diskutiert. Ein Schwerpunkt der Debatte liegt dabei auf dem Einfluss der Artenzahlen als auch der funktionellen Gruppen auf verschiedene Ökosystemfunktionen, wie zum Beispiel der Primärproduktion, …
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Water turnover in species-rich and species-poor deciduous forests: xylem sap flow and canopy transpiration
Die Bedeutung der Pflanzenvielfalt für Ökosystemfunktionen ist ein zentraler Forschungsschwerpunkt in der Ökologie in den letzten 15 Jahren. Viele Untersuchungen fokussieren sich auf die Bedeutung der Artenvielfalt für Pflanzenbiomasse und produktivität im Grünland; viel weniger ist bekannt wie die …
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Quantifying water use by temperate deciduous forests in South Korea : roles of species diversity, canopy structure, and complex terrain
… seventy percent of South Korea is covered with forests, most of which are found in the mountain regions since mountains receive more rainfall and are difficult terrains not suitable for agriculture. Because mountains are important water sources for cities and human population downstream, …
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The effects of accelerated soil acidification on aggrading temperate deciduous forests: The Fernow Experimental Forest Long Term Soil Productivity (LTSP) Study at 13 years
Many temperate forests in the Eastern US are young and have experienced decades of elevated inputs of acidic compounds from the atmosphere. As a result, I used the Fernow Experimental Forest Long Term Soil Productivity (LTSP) experiment near Parsons, WV to determine how ongoing acidic deposition …
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Wild bees in temperate deciduous forests: how does management affect bee communities, and can we use active remote sensing data to model bee biodiversity?
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Changes in avian diversity and potential invasive seed dispersal post-wildfire in a Southeastern deciduous forest; Flipper Bend Woods, Signal Mountain, Tennessee
In eastern deciduous forests, fire-disturbance and its ecological implications have not been heavily studied. In Tennessee, a recently burned site (2016) presented a unique opportunity to analyze habitat regrowth two-three years after a major wildfire thought to have been worsened by invasive …
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The effects of age and size of canopy gaps on the mycorrhizae of yellow birch (Betula alleghaniensis Britton) and sugar maple (Acer sacchrum Marsh.) from deciduous forests of the Québec city region
… mycorrhizae of sugar maples collected from two deciduous forests in central Quebec were examined. The colonization of maple roots by arbuscules, vesicles, and coils were quantified. Colonization by ectomycorrhizal fungi was quantified and characterized using morphotyping and molecular …
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Fire and non-native grass invasion across a heterogeneous landscape in the Central Hardwoods
… in a positive invasion-fire feedback in eastern deciduous forests managed with prescribed fire and how this response varied across the landscape. Using paired invaded and uninvaded plots embedded in forest stands with or without a history of prescribed fire, I quantified differences in fire …
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Tree-Level Forest Monitoring with Artificial Intelligence Using Neural Networks and High-Resolution Imagery
… of these studies have had difficulty with dense deciduous canopies and most have focused on tree detection and not individual tree segmentation. In this collection of studies, I utilize sub-meter multispectral imagery with an instance segmentation convolutional neural network (CNN) to how …
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Effects of drought on the growth of young and mature temperate forests in West Virginia
Recent research suggests that the temperate deciduous forests of the eastern United States may have played a significant role in the sequestration of atmospheric carbon dioxide over the last 100 years. However, little is known about the role of forest management and climatic variability on the …
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Acidification and eutrophication of forests on sandy soil: effects of forest type and deposition load
Forests on sandy soil did clearly acidify during the past decades, what was found to be related to high depositions of potentially acidifying compounds to the forest floor. Several factors are a stimulus for high atmospheric deposition load in these types of forest ecosystems. (1) Forests are often …
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Understanding Invasive Species Impacts on Reclaimed Surface-Mined Lands
… region of the US is home to extensive temperate deciduous forests that provide many ecosystem services and economic benefits. However, >400,000 hectares of forest have been lost due to surface coal mining, with most not being restored back to native forests or other productive land uses. These …
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Nest-site selection by Sharp-shinned Hawks in Kentucky
… dbh of 38.2 cm. Nests were in mixed coniferous/deciduous forests, with a mean canopy cover of 77.6%. Comparison of the characteristics of nest sites and randomly selected unused sites revealed significant differences (P = 0.021). Discriminant analysis revealed that five variables (foliage cover, …
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Relationship of Forest Characteristics and Landscape Patterns To Wild Turkey Populations in Eastern and Central South Dakota
… turkeys. Tree species diversity was greatest in deciduous forests of northeastern South Dakota which included Roberts, Marshall, and Jerauld counties. The means of nineteen landscape and forest characteristic variables were compared among the most forested quarter ("best quarter") (84. 2 1 ha) of …
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