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 10 of 10 for “"nutrient stoichiometry"”.
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Consumer nutrient stoichiometry : patterns, homeostasis, and links with fitness.
The linkages between food webs and nutrient cycles are heterogeneous and often influenced by human activities. Ecological stoichiometry provides one framework for understanding and predicting these linkages. Yet, as it has been extended underlying assumptions are often not evaluated. This …
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Seasonality of the marine carbonate system in the southern Benguela nutrient stoichiometry, alkalinity production, and CO flux
… on three key points: the processes driving bulk stoichiometry, alkalinity production on the continental shelf, and the air-sea flux of CO2. Monthly samples were taken along the St. Helena Bay Monitoring Line in the southern Benguela for ten of the months in 2010. Samples were analysed for …
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Influence of Varying Inorganic Nutrients Supply on Ergosterol and Glucosamine Concentrations and Biomass Nutrient Stoichiometry in Ectomycorrhizal Fungi
… and ratios to assess how exogenous nutrient supplies affect fungal biomass stoichiometry and the degree of elemental homeostasis. Additional studies also examined nutrient and ratio effects on fungal ergosterol and chitin concentrations, which are important biochemical indicator …
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Utilising Chlorophyll Fluorescence to Assess the Variability of Phytoplankton Biomass and Productivity in the North-West European Shelf Seas
… marine ecosystem services such as biogeochemical nutrient cycles and fisheries. Therefore, the ability to accurately quantify and predict the environmental influences that govern this process is of paramount importance. Through surveying and experimental approaches, I investigated the variability …
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The Effects of Neuroendocrine Stress on Larval Development
… can affect larger-scale ecosystem dynamics, like nutrient cycling and disease epizootics. Animals are not equally susceptible to stressors across all stages of their life cycles. Critical windows of development, common in young and developing animals, are time periods when stressors have an …
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Ecological assessments of Pseudomonas communities in pastoral soils: implications for disease suppression and sustainable production in agricultural grasslands
… of soil organic matter quality, C:P ratio (nutrient stoichiometry), and aromaticity of the dissolved organic matter content (carbon recalcitrance). These associations between soil organic matter quality and soil disease suppressive communities were challenged and validated using a structured …
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Using Silicon Isotopes to Trace the Biogenic Silica in the Southern Ocean
… to 5 degrees) affects phytoplankton physiology, nutrient stoichiometry, Si uptake kinetics, and Si isotope fractionation in model diatoms. An increase in temperature resulted in an increase in growth rate for all the diatoms under Fe-replete conditions while Fe limitation resulted in a decrease …
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Using Silicon Isotopes to Trace the Biogenic Silica in the Southern Ocean
… to 5 degrees) affects phytoplankton physiology, nutrient stoichiometry, Si uptake kinetics, and Si isotope fractionation in model diatoms. An increase in temperature resulted in an increase in growth rate for all the diatoms under Fe-replete conditions while Fe limitation resulted in a decrease …
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Nitrogen cycling in the South Atlantic and South Indian Oceans investigated using nitrate isotopes: implications for nutrient supply, ocean fertility, carbon export, and climate
… Indian Oceans are presented alongside coincident nutrient and hydrographic data, and other published nitrate isotope datasets. Combined, these data provide a means of quantifying the rate and distribution of N2 fixation, along with characterizing additional co-occurring N cycle processes, …
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The Influence of Changing Nutrients and Warming on Phytoplankton and its Interactions with Zooplankton in the North Sea
… Hybrid interaction strengths increase under low nutrient and light availability. Bottom-up strength (from primary producers to grazers) is highest under high light availability, N:P between 20 and 25, and intermediate SST; whereas top-down strength (from grazers to primary producers) dominates …