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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 14 of 14 for “"Growth rings"”.
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A Dendrochemical Analysis of Lead, Aluminum, and Calcium in Southern Appalachian American Beech.
… metals, including lead, aluminum, and calcium in growth rings of an important northern hardwood species, American beech (<em>Fagus grandifolia</em> Ehrh.) at Mount Rogers and Whitetop Mountain, Virginia. Dominant and codominant trees were sampled from sixteen research plots located at two …
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Annual Reproductive Potential, Diet, and Growth of the Map Turtle, Graptemys Geographica (Le Sueur)) in a Missouri Stream
The annual reproductive potential, diet, and growth of the common map turtle (Graptemys geographica) was studied from April 1988 through June 1988 in the Niangua River, Dallas County, Missouri. The examination of reproductive tracts from 18 females indicate that two-thirds laid two clutches of eggs …
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Characterization of Sentinel Butte Petrified Wood and Host Lithology Associations
… plant structures including rays, tracheids, and growth rings. These structures were suitable for identifying parent tree type, which was determined to be a gymnosperm. Silica phases involved in the petrification, include microcrystalline quartz (chert), fibrous chalcedony and megaquartz. Silica …
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Daugiamečių žolinių augalų populiacijų vertinimo herbochronologijos metodais galimybės /
… METHODS SUMMARY Arrangement of annual growth rings in the roots of Lupinus polyphyllus, Malva alcea, Rumex acetosa, R. confertus, R. obtusifolius, Arctium tomentosum, Cichorium intybus, Heracleum sosnowskyi, Armoracia rusticanais were analysed. Three different populations of Lupinus …
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Dealing with contaminated land in the ‘New Regime’: an appraisal of the use of plants as biomonitors for metal contamination analysis and risk assessment for a former landfill site in Greenwich
… be drawn up via tree roots and deposited in the growth rings. This was examined using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LAICPMS) and Proton Induced X-Ray Emission (PIXE). From the plant analysis, the elements present in highest amount were lead, zinc and cooper. The …
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Geography, coloration and speciation in a genus of neotropical reef fishes (Gobiidae: Elacatinus)
… week larval duration (determined from otolith growth rings). My results suggest that local retention of pelagic larvae, coupled with biogeographic breaks, has generated or maintained strong genetic population structure which may facilitate adaptation to local ecological conditions. Such …
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Influence of site, clone, age, and growth rate on wood properties of three Populus X Euramericana clones
… properties of the clones. The effect of age and growth rate on specific gravity and anatomical properties were also investigated. Differences among clones for growth ring widths were significant in the "good" years only. Specific gravity was high near the pith, then each of the clones exhibited a …
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Comparative age and growth of juvenile dusky kob (Argyrosomus japonicus) in three South African estuaries, with notes on diet and temperature effects
… African estuaries was estimated by counting growth rings in sectioned sagittal otoliths read under a dissecting microscope using reflected light. The reproducibility of otoliths readings was described by the average percentage error (APE) index and was found to be 0.44% (Breede), 2.78% …
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Climatic influences on sagebrush establishment in Arid Rangelands: Applications for rangeland rehabilitation.
… years of successful recruitment through annual growth-ring analysis. Linking annual growth-rings of sagebrush to climate identifies climatic patterns responsible for recruiting new sagebrush cohorts. In Nevada, primary applications of this research include rehabilitation of mined lands, wildfire …
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Evolution of Roots
… process of evolution was to record a lifetime of growth. The growth rings would expose times of great nourishment, times of trauma and drought and times of renewal and vigorous growth. This tree would evolve from seed to sapling to young adult, and finally to a fully mature tree. The evolution of …
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Evolution of Roots
… process of evolution was to record a lifetime of growth. The growth rings would expose times of great nourishment, times of trauma and drought and times of renewal and vigorous growth. This tree would evolve from seed to sapling to young adult, and finally to a fully mature tree. The evolution of …
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Ecology and morphology of the Kalahari tent tortoise, Psammobates oculifer, in a semi-arid environment
… Schmidtia pappophoroides, being the prevalent growth form. This habitat resembled a Savanna vegetation type Schmidtia pappophoroides – Acacia erioloba described for a neighbouring reserve. Site W was stonier, dominated by shrubs, and was reminiscent of Northern Upper Karoo vegetation (NKu3). …
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Ray Tracing Confirms the Optical Properties of the Bovine Lens Are Actively Maintained by the Microcirculation System
… of the lens, that was consistent with the lens growth rings that are formed during lens development. In some instances, information of the absolute refractive index of the lens was also required. The overall lens optics, determined by the product of the lens geometry and GRIN, was then validated …
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Development of Urban Tree Growth Models Based on Site and Soil Characteristics
… trees from reaching their genetic potential for growth, longevity, and ecosystem function. To overcome these limitations, greater understanding of tree growth in the urban environment is needed. The goal of this research project was therefore to characterize a broad suite of soil characteristics …