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 36 for “"Specific leaf area"”.
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The environmental physiology of tomato (Lycopersicon esculentum Mill. cv. Heinz-6004) and black or eastern black nightshade (Solanum nigrum L. and Solanum ptycanthum Dun.) competition
… and 60 days after planting, and dry weights and leaf areas determined. Degree-day models accurately predicted the growth of both species for all planting dates. Eastern black nightshade produced significantly more biomass than black nightshade, although the weight of berries was equivalent for …
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The Influence of Elevated Carbon Dioxide and Water Availability on Herbaceous Weed Development and Planted Loblolly Pine (Pinus taeda) and Coppice Sweetgum (Liquidambar styraciflua) Growth
… watered conditions with significant increases in leaf area, specific leaf area, leaf, shoot and total biomass compared to water stressed conditions. Leaf, root, shoot+stump and total biomass of sweetgum significantly increased and specific leaf area decreased under elevated CO₂ compared to ambient …
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Environmental Gradients Impact Key Leaf Traits in Riparian Trees
<p>Specific leaf area (SLA) reflects a plant’s carbon investment per area and relates to generalized leaf economics spectrum growth strategies (LES). To fill gaps of knowledge about intraspecific SLA variation and why it is often inconsistent with the LES, we studied the response of two riparian …
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Water Use and Water Tolerance in the Riparian Species American Sycamore (Plantanus occidentalis L.) and How its Physiology Compares to the Coexisting Black Willow (Salix nigra Marshall)
… drought, CO<sub>2</sub> assimilation and free leaf proline concentration were determined from greenhouse treatments, and separately for individuals growing in the field under natural conditions. Measurements of free proline concentration were also collected from greenhouse individuals to assess …
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Functional analysis and modelling of vegetation: plant functional types in a mesocosmos experiment and a mechanistic model
… succession of plant functional types using the 'Leaf-Height-Seed Scheme'. This classification scheme uses only the plant traits specific leaf area, plant height and seed weight. A trait hierarchy for the assembly of plant communities is formed in gradients of fertility and disturbance. The third …
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Discerning Differences in the Plant Traits of the Floral Communities of Mt. Washington, NH, by Incorporating Intraspecific Variability Analysis
… Here, I analyzed plant traits (plant height, leaf area, specific leaf area, and leaf dry matter content) of four herbaceous plants found growing atop Mt. Washington, NH in sheltered snowbanks. They are also found in the sub-alpine understory. I examined baseline differences between the alpine …
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Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus
… species for planting in existing and new areas has to be implemented. An understanding of the physiological factors ruling growth and water use efficiency in Eucalyptus is needed to develop selection criteria for improved water use efficiency and harvestable stem production under a limited …
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Primary plant succession at Franz Josef Glacier: Aspects of predictability and ecophysiology: A dissertation submitted in partial fulfilment of the requirement for the Degree of Bachelor of Horticultural Science (Honours) at Lincoln University
… during early succession and pedogenesis. Total leaf N was determined for 3 species, Griselinia littoralis, Pseudopanax colensoi and Coprosma lucida, on each site. Leaf N (mg/g) was highly variable exhibiting no clear trends. Leaf N per unit leaf area (mg/cm² ) declined with increasing surface …
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Resource partitioning of soil organic phosphorus: investigations from a tropical mountain forest
… high growth, significantly greater total and specific leaf area, and significantly greater P use efficiency when compared to the other experimental treatments. R. montana (NM) also had 3 fold greater total P in the inositol P treatment than in the no-P control (p=0.064), and had significantly …
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Changes in Leaf Area and Nutrient Content of Celtis spp. Across a Precipitation Gradient in Texas
… that an increase in precipitation increases leaf size and the C/N ratio, but can decrease leaf nitrogen concentration, thereby increasing the quantity of forage while potentially decreasing quality. I examined whether this prediction held across the longitudinal precipitation gradient of …
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Evaluation and Application of the Community Land Model for Simulating Energy and Carbon Exchange in Agricultural Ecosystems
… production (GPP), ecosystem respiration (ER) and leaf area index (LAI). The key parameters include the maximum carboxylation rate at 25 oC (Vcmax25), specific leaf area at the top of the canopy (slatop) and a parameter determining the initial carbon allocation to leaves (fleafi). CLM4-CropM …
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The physiological importance of small leaf sizes in the mediterranean type ecosystem vegetation of the Cape floristic region
… layer conductance, which is determined by leaf shape and size, surface modifications and wind speed. We expected fine-leaved species with higher boundary layer conductance to transpire faster than broad-leaved species at low temperatures whereas at higher temperatures we expected …
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Exploring the mechanisms and impacts of plant invasions in grasslands
… native and non-native species did not differ in specific leaf area or leaf %N across natural or nutrient enriched grasslands worldwide. Since these traits are indicative of plant growth strategies, this suggests successful native and non-native grassland species exhibit similar growth strategies. …
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Crescimento do porta enxerto 'Sunki tropical' (Citrus sunki hort. ex tan) em substratos orgânicos.
… length and diameter of the main root (CRP, DRP), leaf number (N ° F), leaf area (LA), dry matter (FS), reason leaf area ratio (LAR), leaf weight ratio (PPR), specific leaf area (SLA), specific leaf weight (PEF), absolute growth rate (AGR), relative growth rate (RGR), root / shoot ratio shoot (R / …
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The importance of cotyledon functional morphology and patterns of seed reserve utilization for the physiological ecology of neotropical tree seedlings
… all species exhibit phenotypic plasticity in leaf photosynthetic capacity, leaf thickness, and allocation patterns in response to light environment. In both sun and shade, more light-demanding species have higher relative growth than shade-tolerant species, enabled by their photosynthetic …
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N and P limitation of fynbos plants and the nutritional status of legume habitats in the Cape Floristic Region
… nonlegume species to N and P supply were species specific, but that the legume species seemed to be more limited by N supply than the non-legumes. There was no N x P interaction in this study, which implied that the plant response to N and P, did not depend on the levels of each other. Given the …
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A functional analysis of the response of the Southern Kalahari dune vegetation to land-use intensity
… utilisation pressure. Plant height, spinescence, specific leaf area, leaf dry matter content, leaf sclerophylly and stem density were found to be examples of such traits. Phanerophyte and chamaephyte dominated functional groups were mostly associated with lower range condition and hemicryptophyte …
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Analysis of the Effect of Two Tillage Systems on Soybean (Glycine Max (L.) Merrill) Growth
… biomass (TPDB), the stem dry biomass (SDB), the leaf dry biomass (LDB) and the pod dry biomass (PODDB) were substantially larger with CT than with NT. The soybean planted with CT demonstrated hastened maturity, increased crop growth rate (CGR), leaf area index (LAI), net assimilation rate (NAR), …
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The Light and Water Stress Tolerance of Two Invasive Legumes: <I>Cytisus scoparius</I> (Scotch broom) and <I>Spartium junceum</I> (Spanish broom)
… treatments with its smaller number of leaves, leaf surface area, percentage leaf weight, specific leaf area, and leaf area / stem area ratio. Spartium junceum also displayed larger root / shoot ratios in drier conditions. The magnitude of these shifts was typically greater in C. scoparius, but …
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Understanding plant water relations and root biomechanics for hydro-mechanical reinforcement of slopes
… with above- and below-ground plant traits (e.g. specific leaf area; root length density). The ten species showed large differences in terms of water uptake, which translated to significant differences in matric suction and soil strength. Species with the largest water uptake increased soil …
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