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 23 for “"wood density"”.
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Using microarrays to elucidate the genetic basis of wood density in sitka spruce and poplar
… the pulping industry.<br/>The high demand for wood and the increasing human population mean that<br/>natural forests are being lost and degraded. A potential solution to this problem is<br/>to improve the productivity of our plantation forests to relieve the pressure on<br/>natural forests in …
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Plant traits and drought tolerance in the savanna : a Kruger National Park case study
… drought tolerance/avoidance and to test whether wood density is a good indicator of drought tolerance. The study was carried out in Kruger National Park in the month of June. A number of plant traits including wood density, leaf thickness, leaf life span/longevity and water potential were …
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Tree-ring analysis and stem biomass estimation of limba (Terminalia superba Engl. & Diels) in the framework of sustainable forest management
… The lack of long-term data on tree growth, wood production and carbon stocks hampers the implementation of sustainable forest management and possible financing by Kyoto Protocol related tools like REDD+ and Clean Development Mechanisms. Africa is the continent with the lowest percentage of …
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Assessment of Genetic Variation of Acer rubrum L. and Liriodendron tulipifera L. Populations in Unmanaged Forests of the Southeast United States
… increasingly important roles in forestry and wood products in this region. The relatively low density and intermediate strength of the wood makes them versatile for use in many different wood products. Exploring the genetic structure of these species could provide a foundation for further …
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Deer impact and plant resistance traits
… Previous research has shown that high deer density can change the relative abundance of tree species in forest communities. Furthermore, some evidence shows that resistance traits of plants can influence plant photosynthetic ability which is an important factor in an ecosystem. The purpose …
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Modeling increased height, diameter, and specific gravity effects on yield estimates in planted loblolly pine stands
… growth increases in diameter, height, and wood density were considered. The models considered were multiple regression and the diameter distribution approach using the beta distribution. Under the diameter distribution approach alternatives involving a piecewise integration over diameter …
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The Ecology of Invase tree species in Singapore
… from native pioneer tree species in terms of wood density, dry seed mass, height, leaf area, or flower sexual system. Invasive tree species differed from widely planted but non-invasive tree species in their lower wood density, smaller dry seed mass, larger distance to their natural range, and …
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ΕΡΕΥΝΑ ΠΟΙΟΤΙΚΩΝ ΧΑΡΑΚΤΗΡΙΣΤΙΚΩΝ ΤΟΥ ΞΥΛΟΥ ΕΞΙ ΝΕΩΝ ΚΛΩΝΩΝ ΛΕΥΚΗΣ ΣΕ ΣΧΕΣΗ ΜΕ ΤΟ ΓΕΝΟΤΥΠΟ, ΤΗΝ ΗΛΙΚΙΑ ΚΑΙ ΤΗΝ ΤΑΧΥΤΗΤΑ ΑΥΞΗΣΕΩΣ ΤΩΝ
… TO EXAMINE PATTERNS OF VARIATION OF SOME WOOD QUALITY CHARACTERISTICS I.E. RING WIDTH, WOOD DENSITY AND FIBER DIMENSIONS AND TO DETERMINE THE POSSIBILITIES OF IMPROVING WOOD QUALITY IN RELATION TO GENOTYPE, AGE, AND GROWTH RATE. RING WIDTH, WOOD DENSITYAND FIBER DIMENSIONS ARE UNDER …
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North Bend: Archaeological Site Formation and the Hough Type at Mallows Bay-Potomac River National Marine Sanctuary
… field methods, resistograph analysis for wood density, to gain comprehensive insights into the disintegration and preservation of North Bend and similar vessels. Significantly, this thesis aligns with the strategic objectives of Mallows Bay-Potomac River National Marine Sanctuary, …
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Wood trait preferences of Neotropical xylophagous beetles (Coleoptera: Cerambycidae)
… correlated with functional plant traits, such as wood density (WD), moisture content (MC), bark thickness (BT), and nitrogen content (N); these traits affect the nutrients available to xylophagous insects. Cerambycid beetles feed on substrates that vary in these traits, but little is known about …
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Nipping the bud hypothesis : a comparison of savannah and forest tree responses to canopy scorch
… to hydraulic disruption was measured using wood density as a proxy for conduit reinforcement. The results are inconclusive and possibly affected by the growth rates of certain shade-tolerant forest trees. The differences in crown resprouting following canopy scorch of forest and savanna …
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Water sourcing by riparian tree species in ephemaral rivers
… as trees provide valuable fodder, shade, firewood and construction material in otherwise inhospitable surroundings. Climate change, population growth and development needs all place growing pressure on these water-limited ecosystems. Careful catchment management is essential to meet human …
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Potential of above- and below-ground coarse woody debris as a carbon sink in managed and unmanaged forests
… management is an increase in the stock of coarse woody debris (CWD). CWD represents a short- to middle term C sink that is of particular importance in natural and old-growth forests. Its impact on the soil organic carbon (SOC) stock is largely unknown. To investigate the impact of management, a …
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Genetic variability in Douglas-fir based on molecular genetic markers and morphological traits
… (P) and control families. However, lower wood densities were observed in full-sib and in half-sib (C) families. Individual tree narrow sense heritability estimates in growth traits (0.116-0.234) for half-sib (C) and half-sib (P) families were comparable whereas heritability estimates in …
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The ecology of sprouting in South African forests, savannas and fynbos
… bark thickness, seed mass, plant height and wood density. The functional groups are seen to reflect local disturbance regimes: Acacia species found in mesic, frequently burnt portions of the park sprout strongly as adults and/or are fire resistant, but are poorly defended against herbivory. …
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Factors Affecting Heat Transfer from Firebrands and Firebrand Piles and the Ignition of Building Materials
… the heat transfer from firebrand piles including wood moisture content, wood type (hardwood or softwood), wood density, wood state (live, dead, or artificial), wind speed, pile mass, firebrand diameter, and firebrand length. The second phase of this research used the same method of high-resolution …
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A simulation and empirical study of cross-laminated timber from waney SA Pine timber
… MPa. This can probably be ascribed to the higher wood density and stiffness of waney boards compared to clear boards – since waney boards came from the outer parts of logs. Comparisons were also made between the CLT panels’ experimental stiffness and strength results and the predicted bending …
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