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 35 for “"biomass allocation"”.
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Vegetative and reproductive biomass allocation responses of herbaceous plant species to induced drought in a semi–arid highland savanna, central, Namibia
… in precipitation, affecting plant growth and biomass allocation. Recurring droughts, intensified by climate change lead to alterations in biomass allocation. Thus resulting in the reduction of medicinal products, livestock fodder, and food sources while disrupting nutrient cycles. This study …
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Assessment of Growth Response and Patterns of Biomass Allocation by Panicum hemitomon Schultes: Implications for Thick-mat Floating Marsh Creation and Restoration
… techniques. All partitions of Panicum hemitomon biomass (shoot, rhizome, and root material) were enhanced under nitrogen, and to a lesser extent, phosphorous enrichment. Saturated (not inundated) hydrologic conditions were most conducive for robust growth by all partitions of Panicum hemitomon …
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Plant Architecture, Photosynthetic Responses, and Population Biology in the Palms Socratea Durissima and Scheelea Zonensis on Barro Colorado Island, Panama (Physiological, Tropical)
… investigated the role of canopy architecture and biomass allocation in the population biology of the palms Socratea durissima and Scheelea zonensis on Barro Colorado Island, Panama. Canopy architecture and biomass allocation change as plants mature, and can affect light interception and carbon …
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Phylogenetic and functional growth from diversification in the Cape grass genus Ehrharta Thunb
… is associated with differences in seedling biomass allocation and relative growth rate (RGR). Ehrharta s. s. shows wide variation in seedling RGR and regressions based on phylogenetically independent contrasts suggest that differences are better explained by early biomass allocation than …
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Effects of Growth Environment on Aboveground Carbon Budgets in Ponderosa Pine
… temperature, climate-induced changes in biomass allocation, and increased atmospheric CO$\sb2$ concentration, could have a significant effect on future forest carbon flux.
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Effects of nitrogen and water on growth, photosynthesis, and leaf properties of deciduous tree species with consequences for gypsy moth herbivory
… and water availability in the field. Growth and biomass allocation were examined for the three species. Photosynthetic response was determined and feeding trials with gypsy moth larvae were conducted with both birch species. I found that the effects of nitrogen on growth and biomass allocation …
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Effects of nutrient loading in Lutz spruce seedlings (Picea x lutzii Littl.) during nursery rotation and on subsequent growth in field
… – 27th September) to investigate the effects on biomass allocation, frost hardiness, root growth capacity and nutrient status after the nursery rotation. The total biomass of loaded seedlings was similar to unloaded seedlings after the nursery culture, but the increase in N from the nutrient …
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Sugar maple (Acer saccharum Marsh.) provenances differ with climate of origin in survival, growth, and traits along a climate gradient: implications for the species' distribution under climate change
… (Acer saccharum) seedling survival, growth, biomass allocation, and functional traits, and whether this response varies with populations’ climate of origin. I first examine survival and growth of forest-planted seedlings across a natural climate gradient and beyond range limits to determine …
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An Ecophysiological study of two key grass species, Anthephora Pubescens Nees and Eragrostis Curvula (Schrad.) Nees
… to have a significant effect on the pattern of biomass allocation to the vegetative organs in both species, while reproductive allocation was absent. A decrease in net co2 uptake rate per unit leaf area, exhibited by both species, coincided with a decrease in leaf production per plant. …
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Phenotypic plasticity in Mercurialis annua : the role of signal detection and response in sex determination
… increases, while cosexes respond by increasing biomass allocation to the female function. Phenotypic plasticity in this species is likely a result of environmental detection. This study investigated possible mechanisms for density detection. Greenhouse experiments showed that Mannua responded to …
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Establishment and Competitive Ability of Nelumbo Lutea in Relation to Myriophyllum Spicatum
… was high in all tested light levels. Total biomass increased significantly with increasing light. Biomass allocation shifted significantly to root production between 3 and 6 weeks in the 10 and 24% levels. Survival decreased with increasing planting depth, and biomass of survivors reduced …
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The effect of light-limitation on spinescent structural defence and its implications on resistance to herbivory in the shade
… herbivory is to reduce the amount of damage to biomass, but more specifically to protect against damage to meristematic tissue. The defences employed depend on the type of herbivory experienced, which is contingent on the herbivore and its mouthparts. This investigation was concerned with …
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The Effect of the Site of Nitrogen Assimilation on Plant Growth
… or mostly in the leaves, measure growth and biomass allocation parameters of those plants when grown on NO3-, and compare them to growth of wild-type (WT) plants and nitrate reductase deficient mutants. Two techniques were used to manipulate the site of NO 3- reduction: (i) grafting and (ii) …
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Relationship between coastal vegetation biomass with elevation and salinity gradients
… on characteristics of the dominant plants (e.g., biomass allocation to belowground parts). In this study, I quantified differences in abiotic and vegetation characteristics between high and low marshes at coastal and inland sites. I hypothesized that total primary production would be lower in low …
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Analysis of the Potential for Diazotrophic Endophytes to Increase Efficiency of Bioenergy Crop Production: Growth promotion effects of the endophytes isolated from Populus trichocarpa and Salix sitchensis
… and Forest Sciences Sustainable production of biomass for bioenergy relies on low input crop production. Inoculation of bioenergy crops with plant growth promoting endophytes has the potential to reduce the fertilizer inputs through the enhancement of biological nitrogen fixation. While …
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Interactive Effects of Ferulic Acid and Irradiance on Plant Growth and Photosynthetic Rate
… of irradiance and ferulic acid (FA) on growth, biomass allocation and plant photosynthetic capacity were monitored in summer greenhouse experiments. The experimental design consisted of two levels of irradiance (ambient sun conditions and ~60% reduction by one layer of shade cloth) defining the …
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Ecological influences in the biogeography of the Austral sedges
… nutrient accumulation behaviour or strategy of biomass allocation to roots or structural organs vs. leaves. No robust patterns were observed to identify such adaptations or to distinguish the tribes ecologically, a result that is at least partly due to low statistical power in the data set …
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Genetic Control of the Response to Sulfur, Nitrogen, and Phosphorus Supply in Arabidopsis thaliana
… adapted to nutrient deficiency. Traits such as biomass allocation or root architecture were suggested as potential targets in the process of developing new crop varieties. This analysis is unique since, to my knowledge, it is the first one which provides the characterisation of arabidopsis …
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Testing the potential of priority effects to sustainably increase community function in semi-natural grasslands
… grasslands in terms of functionality (biomass production), species composition and the interplay of both. This has implications for the general understanding of (plant-) community assembly, restoration practise, and land management as well as for conservation of central Europe’s …
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Water Relations of Ponderosa Pine in Contrasting Environments: Implications for Global Climate Change
… controlling water transport is the ratio of biomass allocated to leaves versus sapwood (AL/AS). Within Pinus, trees decrease ALAS in response to rising VPD. Thus, rises in air temperature and VPD may profoundly alter the water relations of trees and forests. I used stands of ponderosa pine …
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