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 11 of 11 for “"Tree ring width"”.
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An 828 Year Streamflow Reconstruction for the Jordan River Drainage Basin of Northern Utah
… used to identify potential sampling sites where tree growth would be sensitive to climate and factors affecting stream run-off. Over eighty samples from ancient limber pine (Pinus flexilis) and Douglas-fir (Pseudotsuga menziesii) were obtained to perform the reconstruction. Results indicate …
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Relationships between tree rings and Landsat EVI in the Northeast United States
… activity of vegetation. Networks of tree ring width (TRW) chronologies provide ground-based estimates of annual net carbon (C) uptake in forests, and time series of EVI and TRW may capture common productivity signals. Robust correlations between mean TRW and EVI may enhance spatial …
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Radial growth response of eastern hemlock to infestation of hemlock woolly adelgid
… of this study were to quantify changes in tree-ring width and wood anatomy for trees that survived adelgid infestation, and to contrast dendroclimatic relationships across a latitudinal gradient. Six sites spanning the current range of hemlock woolly adelgid (HWA) infestation were selected. …
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Dendroclimatology of Pinus sylvestris L. in the British Isles
A study of the properties of tree-ring density and ring-width chronologies from five sites in the British Isles, two in Sweden and two sub-fossil sites in Northern Ireland is described. The technique of x-ray densitometry is used to measure density. It is shown that it is possible to use x-ray …
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Forward modeling of tree-climate relations across the Northern Hemisphere
This thesis uses the Vaganov-Shashkin model of tree ring formation, a multivariate, nonlinear, mechanistic model that directly predicts tree-ring growth using climate data, to simulate tree-ring formation across the Northern Hemisphere. Previous research has shown the model has skill in reproducing …
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SILVER FIR AND ITS PROVENANCES IN A CLIMATE CHANGE PERSPECTIVE
… Park in natural and planted forests, comparing the growth performance of three provenances of this species in Italy: (a) Western Alpine - (b) Northern Apennine (local) - (c) Southern Apennine. Drought severity was defined by the Standardized Precipitation-Evapotranspiration Index (SPEI). We …
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Tree-ring studies of Chestnut (Castanea sativa) in the Belasitsa Mountain in southern Bulgaria
… and Southern Europe. It is a multi-functional tree species and through the ages it has been cultivated for wood and seed production. It has a considerable economic value, as well as being a large part of the culture and landscape of the Mediterranean countries. Field work was conducted in June …
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Wachstumsraten, Wachstumsmuster und Wachstumsstörungen tropischer Bäume: Analyse von Langzeiteffekten und kurzfristigen Störungen mit Hilfe von Jahrringstudien
… 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 of the six biomes found in Brazil. Out of these four biomes, …
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Dendrochronological investigations of living and relict yew trees from eastern England
… reconstructions is therefore needed. Tree rings have provided annually resolved and absolutely dated reconstructions of temperature or hydroclimate variability over past centuries to millennia, but as wood decays with time, their number declines drastically. In this PhD, I benefit from …
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Model-based analysis of climate change impacts on the productivity of oak-pine forests in Brandenburg
… this question by using a model based analysis of tree growth processes and responses to different climate scenarios with emphasis on drought events. In addition, a method is developed which considers climate change uncertainty of forest management planning. As a first 'screening' of climate change …