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 8 of 8 for “"competition for nutrients"”.
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THE ECOLOGY OF A SUBMERSED MACROPHYTE, MYRIOPHYLLUM HETEROPHYLLUM: COMPETITION FOR NUTRIENTS WITH PHYTOPLANKTON AND SEASONAL CHANGES IN TISSUE MINERAL CONTENT
… heterophyllum submersed apices were analyzed for ash, phosphorus, sodium, potassium, calcium, magnesium, iron, manganese, zinc, copper and lead over a 2 1/2 year period, and the floral stem, apex, sub-apex, mid-stem, lower stem and root for one year.</p><p>Apical mineral content was influenced …
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Identification of QTL and candidate genes for plant density tolerance in maize
… 35 years. Meanwhile, the amount of arable land for agricultural production is expected to remain the same. This suggests that grain yields will need to increase on a per unit area basis if food security is to be realized for the planet. This can be done by increasing the number of plants grown …
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Investigation of the relationships between biomass reduction, soil disturbance, soil nutrients and weed invasion in basalt plains native grassland remnants in Victoria, Australia
… is listed as threatened in Victoria, and which forms part of the lowland temperate grasslands which once extended across south eastern Australia. A major threat to the survival of these communities is invasion by a variety of weeds. Weed invasion is often markedly enhanced by disturbance of the …
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A three-dimensional in vitro tumor model representative of the in vivo tumor microenvironment
… vivo animal and human clinical trials. In an effort to address this, a growing number of three-dimensional (3D) in vitro tumor models capable of mimicking specific tumorigenic processes have emerged within the last decade. This concept stems from the understanding that cells cultured within 3D …
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Microbial activity on wood in streams: exploring abiotic and biotic factors affecting the structure and function of wood biofilms
… phosphorus on biofilms in the reference stream. Competition for nutrients by microbial biofilms may play a regulatory role in detrital processing in these streams. Laboratory feeding studies using Tallaperla sp. were conducted to explore the suitability of wood biofilms as a food resource for …
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The growth and productivity of ribes nigrum under various levels of shade and the implications for multifunctional woody polycultures
… currant berries contain a vast array of mineral nutrients that are much higher than many of the major fruits and berries currently in production, with a vitamin C content over three times as high as that found in oranges on a per weight basis. Additionally, they contain high levels of …
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Polysaccharide utilization by the human colonic bacterium, bacteroides intestinalis DSM 17393
… microbiome has co-evolved with the host for an extended period, generating an intrinsic metabolic network capable of modulating both the microbial community and host physiology. Changes in the gut environment shape the microbial community with one of the main driving characteristics being …
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Biotic Interaction of Invasive, Early-Succession Trees and Their Effects on Community Diversity: a Multi-Scale Study Using the Exotic Invasive Ailanthus altissima and the Native Robinia pseudoacacia in the Mid-Appalachian Forest of Eastern United States
… can displace native species, deteriorate native forest, and change plant communities and ecosystem functions. Native plant populations are fundamentally impacted by invasive species because of the interactions between invasive species and native plants. This study focuses on understanding the …