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 16 of 16 for “"Thuja"”.
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In vitro establishment, shoot multiplication, and rooting of Pinus strobus, Pseudotsuga menziesii, and Thuja occidentalis 'Hetz Wintergreen'
… pine), Pseudotsuga menziesii (Douglas fir) and Thuja occidentalis 'Hetz Wintergreen'.
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Light-growth relationships of conifers on wet and dry sites in the interior rainforests of British Columbia
… moisture with the exception of western redcedar (Thuja pilcata Donn ex D. Don) (Cw). Average leader growth of Cw was greater on wet sites with low and moderate levels of canopy cover compared to dry sites. The results of this study suggest that harvest plans can optimize regeneration success by …
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A dendrochronological analysis of Western redcedar sensitivity to climatic moisture deficit
Western redcedars (Thuja plicata Donn ex D. Don) at Royal Roads University, Victoria, BC, were sampled for a dendroclimatological study investigating the relationship between radial growth and climatic moisture deficit (CMD), and visually assessed for vigor and dieback. Radial growth showed the …
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The Efficacy of a Borate and Penetrating Oil Preservative Combination for the Conservation of Exterior Wood
… (Taxodium distichum) and western redcedar (Thuja plicata). The objectives are as follows, 1) To test the efficacy and performance of the coating to retain the borates through accelerated weathering test (QUV) on exterior wood; 2) To gauge the durability of the preservative combination and …
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THE ARCHAEOLOGICAL INVESTIGATION OF CEDAR BARK BASKET TREES IN WESTERN MONTANA: BACKGROUND, METHODS, AND TRIAL STUDY OF CULTURALLY MODIFIED TREES
… cultural modifications of the cedar basket tree (Thuja plicata), and to contribute to the development of a method for inquiry and analysis. Two primary research questions were posed: How does the study of behavioral archaeology and the methodological approach presented in this thesis contribute to …
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THE ARCHAEOLOGICAL INVESTIGATION OF CEDAR BARK BASKET TREES IN WESTERN MONTANA: BACKGROUND, METHODS, AND TRIAL STUDY OF CULTURALLY MODIFIED TREES
… cultural modifications of the cedar basket tree (Thuja plicata), and to contribute to the development of a method for inquiry and analysis. Two primary research questions were posed: How does the study of behavioral archaeology and the methodological approach presented in this thesis contribute to …
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Late Quaternary and Holocene Paleoecology of Interior Mesic Forests of Northern Idaho
… The recent arrival of the dominant tree species, Thuja plicata and Tsuga mertensiana, suggests that they likely did not persist in a refugium during the last glaciation. Instead, these species recently dispersed from coastal populations, but expansion into their interior distributions was likely …
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Spatial and temporal dynamics of fire and vegetation change in Thunder Creek watershed, North Cascades National Park, Washington
… were dominant. Shade tolerant species including Thuja plicata and Tsuga heterophylla first appeared at the beginning of the late Holocene (5200 cal yr BP to present). Chamaecyparis nootkatensis appeared most recently at 2000 years BP. Fire frequency does not significantly change over millennial …
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Growth release of trees following fine-scale canopy disturbances in old-growth forests of coastal British Columbia, Canada
… that constitute these stands: western red cedar (Thuja plicata), western hemlock (Tsuga heterophylla), and Pacific silver fir (Abies amabilis). As a first step, I calibrated the radial-growth averaging method to account for regional-scale variability and capture a more complete range of growth …
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Interacting effects of soil nitrogen supply and light availability on understory sapling growth and foliar attributes
… in contrast, foliar N% of Betula papyrifera and Thuja plicata declined with increasing shade, which would distort assessments of soil fertility and perhaps contribute to increased mortality of these species in deep shade. Strong correlations between foliar Na and ¹³C or growth increment suggest …
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Impact of Gap Size on Environmental Conditions, Survival, and Early Growth of 5 Pacific Northwest Species
… in basal area increment in western redcedar (Thuja plicata), western hemlock (Tsuga heterophylla), Douglas-fir (Pseudotsuga menziesii), and grand fir (Abies grandis). Western hemlock and western redcedar saw increased growth as vegetation cover increased until full coverage where growth then …
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Influence of neighborhood structure and weather conditions on density of vectors and risk for West Nile Virus in Cook County Illinois
… predictor of Culex production, with arborvitae (Thuja spp.) and magnolia (Magnolia spp.) positively associated with larval abundance and spruce (Picea spp.) negatively associated with larval abundance, while shrub are was positively correlated to presence of Culex. Finally, aquatic chemistry was …
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The winds of change: A study of post-glacial dispersal in pacific-northwest conifers
… of two mesic conifer species, western redcedar (Thuja plicata) and mountain hemlock (Tsuga mertensiana), across the PNW using the new RAD-Seq Genotyping-by-Sequencing method and combined the results with new paleoecological data from the same region to reconstruct the past population dynamics …