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 36 for “"temperate forests"”.
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A Global Conservation Assessment of Temperate Forests: Status and Protection
… I compared long-term decline and protection of forests in three major biomes; boreal, temperate and tropical. I found that forests in the temperate biome are less abundant and less protected than forests in the boreal and tropical biomes. I conducted regional analyses for five continents on the …
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The functional role of understorey herbs for litter decomposition in temperate forests
… initial litter quality and climate variables. In forests, components like understorey vegetation are indispensable to ecosystem stability and ecological function. For example, the understorey layer may play an equally important role in regulating the soil microclimate as the overstorey tree …
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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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Post-fire carbon, fuels, and vegetation dynamics in wet temperate forests: implications for future fire and management in the Pacific Northwest
… where fire is infrequent, including wet temperate forests west of the Cascade Range crest in Washington and northern Oregon, USA (“northwestern Cascadia”). In this dissertation, I combined empirical and simulation insights from recent fires in northwestern Cascadia to address research …
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What to plant and where to plant it; Modeling the biophysical effects of North America temperate forests on climate using the Community Earth System Model
Forests affect climate by absorbing CO₂ but also by altering albedo, latent heat flux, and sensible heat flux. In this study we used the Community Earth System Model to assess the biophysical effect of North American temperate forests on climate and how this effect changes with location, tree type, …
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Relationships between tree rings and Landsat EVI in the Northeast United States
Changes in the productivity of temperate forests have important implications for atmospheric carbon dioxide (CO2) concentrations, and many efforts have focused on methods to monitor both gross and net primary productivity in temperate forests. Remotely sensed vegetation indices provide spatially …
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The Effects of Environmental Complexity on Community Structure in Woodland Centipedes
… deadwood and leaf-litter microhabitats in temperate forests. The variation in centipede diversity among similar sites in the Great Smoky Mountains National Park of eastern Tennessee and the Nantahala National Forest of western North Carolina is related to the structural complexity of these …
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Carbon storage during the regrowth and conversion of Virginia Piedmont forests
… global warming. Carbon accumulation by regrowing temperate forests, in regions such as the southeastern United States, may have been extensive enough to counterbalance releases of carbon from the tropics. In the Virginia Piedmont, large amounts of carbon have accumulated in phytomass and detritus …
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From Small to Large: Modeling at the Scale of Ecological Processes to Understand Temperate Forest Range Limits, Biomass, and Traits
… datasets, national forest inventories from temperate regions, with the aim to understand how forest communities may respond to future climate. In each chapter, the methodological focus on scale is conceptually linked with the ecological questions posed.</p><p>In the first two research …
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Growth and stand dynamics of Red maple-dominated forests in the Upper Great Lakes Region, USA
… but not abundant tree species in North American temperate forests. Over the last several decades it has increased in abundance on upland sites throughout its range and today is perhaps the single most abundant tree species in eastern North America. Climate change and associated impacts on forest …
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Rainfall redistribution and change of water quality in tropical forest canopies : patterns and persistence
… The variability of throughfall in tropical forests seems to exceed that of many temperate forests. These differences, however, do not solely reflect ecosystem-inherent characteristics, more likely they also mirror management practices. Apart from biotic factors that influence throughfall …
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Market prospects for wood products certified for forest management and/or legality in Japan
… from plantation and to a lesser degree wood from temperate forests.
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Differential Canopy Leaf Flushing and Site Nitrogen Status Facilitate Invasive Species Establishment in Temperate Deciduous Forest Understories
… structure and function worldwide. In the temperate forests of the northeastern United States invasive plant species frequently establish and colonize edge environments; however, they are not confined to these areas. In this study, I hypothesized that nonnative species presence would be …
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Drivers of forest dynamics: Joint effects of climate and competition
… competition on forest dynamics with a focus on temperate forests. Motivated by scientific interest, this thesis is aimed at contributing to the establishment of fundamental knowledge for proper ecosystem management. Each of the research projects of this thesis explores a facet of forest …
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Long-term patterns of mortality and regeneration in near-natural woodland
… and broke-up.<br></br>6. Compared to other temperate forests, several distinctive aspects of stand development were recognised, particularly: (i) the role of large herbivores in delaying and altering regeneration; (ii) the importance of debarking by grey squirrels; (iii) the potential for …
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Carbon based secondary metabolites in African savanna woody species in relation to anti-herbivore defense
… hypothesis was developed in northern boreal and temperate forests and the extent to which it applies to African savanna woody species remains unclear. In this study we: 1) Compared the use of Quebrachowith Sorghumtannin as standards for condensed tannin quantification, relative to absolute …
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Tannin geochemistry of natural systems: method development and application
… needles, woods, and barks from tropical and temperate forests, coasts, and grasslands. Conifer needles were distinguished by high prodelphinidin content while dicotyledon leaves alone yielded both triterpenoids and flavones. Barks were distinguished by flavanones and tetracosanoic …
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Mechanisms of nutrient limitation and nutrient acquisition in managed and unmanaged forest ecosystems
… and other factors on biogeochemical processes in forests is necessary to ensure the sustainability of forest management. Here I report the results of several investigations into nutrient acquisition processes in the forests of New Hampshire. I begin with a meta-analysis of fertilization studies …
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IMPACT OF CLIMATE CHANGE ON WILDLAND FIRE THREAT TO THE AMUR TIGER AND ITS HABITAT
… of the dominant disturbance agents in boreal and temperate forests of the Russian Far East (RFE). In the RFE, large fire events lead to abrupt, extensive, and long-term conversion of forests to open landscapes, thus considerably impacting the habitat of the critically endangered Amur tiger …
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