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 13 of 13 for “"shade tolerance"”.
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Studies on Australian acacias in the South Western Cape, South Africa
… the Cape, their phenology, reproductive biology, shade tolerance, litterfall and biomass. The implications of these findings for management are discussed in the general conclusion, and the raw data is tabulated in four appendices. The work is illustrated with 37 figures.
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Patterns of natural regeneration in pine and hardwood forests of the Upper Coastal Plain, Virginia
… were calculated. Regeneration was categorized by shade tolerance classes for analysis. Soil and light conditions were the measured environmental variables. Conditions in gap and non-gap areas within each cover type were compared using the paired-t test. There were few clear distinctions in sapling …
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Aspects of Velvetleaf (Abutilon Theophrasti Medik.), Jimsonweed (Datura Stramonium L.) and Common Cocklebur (Xanthium Strumarium L.) Interference With Soybeans
… and to determine the cause for the apparent shade-tolerance exhibited by cocklebur.
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Managing Stress Tolerance on Warm-Season Putting Greens in the Transition Zone
… transition zone are a general lack of cold- and shade-tolerance. Protective covers are essential to protect ultradwarf bermudagrass putting greens in the winter months. Unfortunately, golf courses can still experience winterkill underneath protective covers. Two field trials were conducted with a …
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Successive Land Surveys as Indicators of Vegetation Change in an Agricultural Landscape
… characteristics including sprouting capability, shade tolerance, and seed type and these groupings were tested for shifts in frequency across time periods. Landform bias of the witness corners was tested using references contained in the surveys. Results showed significant shifts in white oak …
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Understanding Patterns and Functional Impacts of an Invasive Tree and Its Biological Control in a Riparian System
… I found that Tamarix cover encourages shade tolerance, sexual reproduction and short life cycles in the understory plant community. To better understand the long-term effect of Tamarix defoliation and the response to a specific defoliation event, I examined traits and functional …
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Growth of Understory Saplings in a Forest Exposed to Elevated Carbon Dioxide
… of synchrony in the date of leaf emergence, shade tolerance, and intrinsic rates of growth and photosynthesis. I made measurements of sapling growth, photosynthesis, and leaf demography over three years. There was a greater stimulation of relative growth rate (RGR) for Acer rubrum and …
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Investigation into the potential invasiveness of the exotic Narrow-leaved Bittercress, (Cardamine impatiens L.), Brassicaceae
… were devised to investigate the plasticity, shade tolerance, and phenotypic differences of full-siblings from 3 populations of Cardamine impatiens, a Eurasian species potentially invasive in North America. Potted plants were subjected to 0, 54, 76, or 91% shade created by neutral density …
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The growth and productivity of ribes nigrum under various levels of shade and the implications for multifunctional woody polycultures
… good yields in light to medium levels of shade, with no yield difference found between full sun and up to 65% shading. Additionally, the berries maintained good quality up to the 65% shade level, with sugar levels, acidity, and overall size similar to the control plants. The leaf …
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The role of zooplankton in cyanobacteria bloom development in Australian reservoirs
… high P-storage capacity); (2) wide thermal tolerance, superior shade tolerance and buoyancy regulation; (Briand et al. 2002) and (3) resistance to grazing. To date, research to understand the formation of C. raciborskii blooms and toxicity have mostly focused on environmental factors, but …
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Ecological significance of seed traits in the genus Macaranga
According to the regeneration niche hypothesis, the transition from seeds to seedlings is critical in determining plant distribution patterns. This initial stage of recruitment may be strongly influenced by seed mass via effects on the sensitivity to light quality and soil moisture availability for …
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Patterns and processes in tropical forests: an analysis of forest structure and function from long-term permanent plots in Venezuela, Northern South America
… with adaptation to high soil moisture, greater shade tolerance and thus lower growth rates (e.g. high leaf thickness, high LMA, low foliar nutrient content), whereas for lowland species, traits were more associated with higher resource availability (e.g. high SLA, high nutrient concentration in …