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 93 for “"Woody Species"”.
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Carbon based secondary metabolites in African savanna woody species in relation to anti-herbivore defense
Chemical defense in African savanna woody species have been inferred from foliar condensed tannin and total phenolic concentrations. However these measures are controversial since condensed tannin chemical heterogeneity compromises its simple quantification and total phenolics, which is a measure …
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Factors influencing the distribution of late-seral woody species along the upper Missouri River in central Montana
… and management has focused on early seral species such as cottonwoods and willows, other woody species, including green ash, box-elder, chokecherry, serviceberry, currant, and red-osier dogwood, also provide important structure and diversity to riparian forests. These species, called …
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Factors influencing the distribution of late-seral woody species along the upper Missouri River in central Montana
… and management has focused on early seral species such as cottonwoods and willows, other woody species, including green ash, box-elder, chokecherry, serviceberry, currant, and red-osier dogwood, also provide important structure and diversity to riparian forests. These species, called …
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The role of plant hormones, carbohydrates and indolebutyric acid in root and shoot development of two transplanted woody species
… in the control of root and shoot development of woody plants. An experiment was conducted to determine the effectiveness of IBA root sprays applied to seedling red oaks up to two weeks prior to planting. Bare root Quercus rubra seedlings were sprayed with 0, 3000, 6000 and 9000 ppm of IBA at 0, …
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Nutrient Uptake Estimates for Woody Species as Described by the NST 3.0, SSAND, and PCATS Mechanistic Nutrient Uptake Models
… in crop research but has not been used with woody species. Only a few studies using SSAND and PCATS are available. To better understand the similarities and differences of these three models, it would be useful to compare model predictions with experimental observations using multiple …
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Comparing the effects of two types of Mulches on soil properties and the performance of selected woody species on a degraded land in Kunene region, Namibia
… and leaf chlorophyll content of the selected species (Faidherbia albida, Catophractes alexandri, Vachellia erioloba, and Senegalia galpinii) during three watering periods (once-daily, twice-weekly and once-weekly). A 5 x 5 block grid was used with treatments (control, 5cm leaf litter, 10cm …
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The effects of neighbor, distance, and organic fertilizer on the establishment and early performance of three woody species in a restoration trial in the Kunene region, Namibia
… have explicitly considered how neighboring plant species and plant spacing as well as organic fertilizer influence restoration outcomes. This study evaluated the effects of neighbor identity, planting distance, and organic fertilizer on the growth, survival, and leaf traits of three woody species …
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Woody Species Diversity, Forest and Site Productivity, Stumpage Value, and Carbon Sequestration of Forests on Mined Lands Reclaimed Prior to the Passage of the Surface Mining Control and Reclamation Act of 1977
… the development, composition, and diversity of woody species on pre-SMCRA, forested surface mined land; (ii) estimate forest and site productivity on surface mined land and determine the soil and site properties most influencing forest growth; (iii) estimate projected rotation-age timber product …
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Effects of Clearcutting with Whole Tree Harvesting on Woody and Herbaceous Plant Diversity After 17-Years of Regrowth in a Southern Appalachian Forest
… Three approaches were used to study changes in species composition and structure: (1) forest level, (2) stand level, and (3) diversity indices. Within each approach the forest was stratified into three horizontal vegetative regions based upon height: herb (< 1 m), shrub (between 1 and 5 m), and …
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Composition of the woody plant understory of plateau live oak (Quercus virginiana var fusiformis) clusters in a central Texas savanna
… oak is thought to act as a nurse plant to other woody species on the Edwards Plateau of central Texas; however, little is known of the nature, extent and duration of this facilitation. In this study, a comprehensive assessment of the composition and abundance of understory woody plants in oak …
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Effects of Air vs. Air+Soil Heating During a Simulated Heat Wave on White Oak (Quercus alba) and Black Oak (Quercus velutina)
… understanding of how abrupt heat-stress affects woody species during heat waves lags behind our knowledge of herbaceous species that have been more widely studied in experimental manipulations. A few studies of herbaceous species also suggest that the coupling of soil heating to air heating can …
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Effects of Experimental Flooding Regimes on the Seasonal Carbon and Nitrogen Budgets of Silver Maple (Acer Saccharinum) and Speckled Alder (Alnus Incana Ssp. Rugosa)
… Carbon and nitrogen budgets of dominant riparian woody species may be seriously impacted when flooding occurs after the normal spring flood period. To better understand this process, I exposed silver maple (Acer saccharinum L.) seedlings to summer, fall, and continuous (summer + fall) root …
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Land Condition Trend Analysis Plot Inventory Field Methods: a Natural Resource Inventory and Forest Community Analysis Camp Clark, Nevada, Missouri
… initiated at Camp Clark in the spring of 1993. Woody species of plants were mapped for 12 of 20 transects sampled. A forest community polar ordination was performed to determine community relationships. Seven plant communities were identified within the boundaries of Camp Clark. A survey of the …
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The colonisation by vegetation of colliery spoil heaps in the Forest of Dean, Gloucestershire, and implications for biodiversity management
… measured using a series of 'expected trends'. Species-richness increased over time until 60 years since disturbance, but the species-evenness pattern did not appear to be affected by time or pH. The bryophyte layer colonised plots over 16 years since disturbance rather than starting the …
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Floristic quality assessment of grassy slough preserve in Johnson County, Illinois
… replanted or contracted for replanting into tree species. There are few studies published on woody species composition during the earliest stages of old field succession in bottomland forest, and even less old field succession focusing on the herbaceous as well as the woody component in bottomland …
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Demography and leaf physiology of Cornus drummondii in response to disturbance in tallgrass prairie
The expansion of woody species into grasslands has altered community structure and ecosystem function of grasslands worldwide. Woody encroachment has led to a loss of floristic biodiversity and changes in ecosystem carbon, nitrogen, and water relations. In tallgrass prairie, the increased cover and …
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The impacts of seven silvicultural alternatives on vascular plant community composition, structure, and diversity in the southern Appalachians
… plant community were characterized by changes in species diversity, species composition, exotic species richness, Raunkiaer's life-forms, and growth-forms. Pre-treatment, baseline data, and a randomized block design ensured the precision of post-treatment comparisons. High-disturbance treatments …
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Vegetation colonization within exposed reservoirs following dam removal on the Elwha River, Washington
… In each plot , I recorded vascular plant species composition and woody species height. I collected and pooled 8 soil samples (20 cm) / plot to assess percent organic matter, nutrients, and percent sand, silt, clay, and conducted a Wolman Pebble Count. I used a structural equation models to …
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Effect of land degradation on the above-ground vegetation and soil seed bank of a Rangeland in Kunene region Namibia
… five quadrats were sampled along each transect. Woody plant species were identified and counted in a 20 x 20 m quadrat, while herbaceous plants were assessed in a 1 m2 quadrant, nested within the larger quadrat. Soil cores samplers measuring 9.7 cm in diameter and 5 cm in depth were obtained …
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