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 17 of 17 for “"primary consumers"”.
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Trophic Dynamic Interactions in a Temperate Karst River
… in trophic-dynamic relationships between primary consumers and their food resources reflect the marked distinction in Cladophora standing stocks in two sections of the upper Green River that flow through differing levels of karstification? 4. Are consumers assimilating primarily …
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Organic Matter Dynamics and Trophic Structure in Karst Groundwater
… levels consisting of organic matter sources, primary consumers, and predators. Patterns of 13C labeling in the stream were similar to that in similar studies of surface streams. 13C acetate was incorporated into epilithic biofilms and fine benthic organic matter (FBOM). Some primary consumers, …
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Predicting the ecosystem effects of harvesting beach-cast kelp for biofuel
… harvesting predicted an immediate decline in primary consumers in direct proportion to the quantity of wrack removed, and a slow decline in shorebirds in response to reduced prey. Primary consumers were predicted to recover to their pre-harvest biomasses within 1 to 2 years regardless of …
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Some Life History and Ecological Activites of the Richardson Ground Squirrel In South Dakota
… a new and tasty source of food. Among these primary consumers which took advantage of man’s interference with the natural prairie was the Richardson ground squirrel, Citellus richardsoni (Figure 1). During the past few years, the Richardson ground squirrel has been found in increasing numbers …
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Dynamics of baseline stable isotopes within a temperate coastal ecosystem: Relationships and projections using physical and biogeochemical factors
… webs; and aiding in the tracking of wide-ranging consumers. However, each of these applications requires accurate measurements of isotopic signatures in organisms at or near the base of the food web (e.g. autotrophs and their consumers), which act as basal reference points from which to calibrate …
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Fungal Biofilm Colonization and Succession on Artificial Reefs in the North-Central Gulf of Mexico
… in seawater. These communities fuel many primary consumers that support artificial reef habitats. Patterns of settlement and succession should be further examined, given the major trophic implications therein, as properties of this biofilm will influence future establishment of other …
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Unruly Matter: Masculine Consumption in English Restoration Literature
… and ideologically as English society’s primary consumers of material goods in the later 17<sup>th</sup> century, there is no scholarly work that aims to describe the shift in English culture from a preoccupation with masculine consumption to an anxiety-ridden focus on the …
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Resident fish community impacts on stocked rainbow trout ecology in 15 eastern Washington lakes
… baseline [gamma]<sup>15</sup>N for littoral primary consumers in several of the lakes. As a result, conclusions should be considered preliminary and tentative. An extensive sampling regimen is recommended for similar future studies to avoid these issues"--Document.</p>
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Causes and consequences of soil carbon mobilization and lake brownification in northern forested landscapes
… of clear oligotrophic lakes increased pelagic primary productivity, but favoured cyanobacteria that could adapt to the browner conditions. The third finding was that changes in the biomass and composition of phytoplankton communities altered the carbon transfer and efficiency of lake food webs. …
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Investigating Causal Relationships between Global Change and Insect Interaction Networks: Insights into Dietary Specialization, Interaction Diversity, and Disturbances
… plants and detritus. The initial increase in primary consumers and taxonomic diversity 1 year post fire was followed by a reduction in the abundance of primary producers due to increases in other trophic levels and a move towards pre-fire network structure. These fire community results are …
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Polycyclic Aromatic Hydrocarbon determination in liver of Menhaden exposed to the Deep Water Horizon Oil Spill
… of the commercial industry fisheries catch. As primary consumers, they are a major link in the food chain. In this study, liver metabolites of PAHs were measured in menhaden using fixed emission fluorescence spectroscopy (FEFS). Liver PAH analyses were performed on fish samples from North …
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Patterns of energy flow in populations of the dominant insect consumers on Marion Island
Five insect species were identified as important primary consumers or decomposers in the terrestrial ecosystem of sub-Antarctic Marion Island. Patterns of energy flow in individuals ("life strategies") and populations (population energetics) of the five species were studied against the evolutionary …
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Interannual Differences in Nutrient Dynamics During a Brown Tide Bloom (<i>Aureococcus anophagefferens</i>) and the Interaction of <i>A. anophagefferens</i> with Heterotrophic Bacteria
… and it, and not bacteria, are the dominant consumers of these resources in the environment. This finding has important implications for bacterial productivity studies that assume bacteria are the primary consumers of the amino acids</p> <p>C and N uptake was also examined over many diet …
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Students' perceptions of service quality at two South African higher education institutions
… witnessed changing circumstances in relation to consumers' needs, tastes and preferences. In this light, service quality has been recognised as a means to meet these challenges. As service industries play an important role in many economies around the world, the significance of providing an …
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The effect of resource stoichiometry on fish and macroinvertebrate nutrient excretion
… how does diet influence nutrient excretion of consumers at different trophic levels? Macroinvertebrates and fish were collected from six streams and nitrogen (N) and phosphorus (P) excretion were quantified. Epilithon, leaf detritus, and seston (fine particulate organic matter in transport) …
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Plankton dynamics of the open Southern Ocean and surrounding the (Sub)Antarctic islands
… is a high-nutrient, low-chlorophyll region where primary productivity is limited mainly by iron and light availability, yet it accounts for ~30-40% of global ocean CO2 absorption annually. Marine plankton play a major role in the Southern Ocean CO2 sink as they fix dissolved atmospheric CO2 into …
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THE OMEGA-6: OMEGA-3 FATTY ACID RATIO IN SWINE NUTRITION: LONG-TERM EFFECTS ON PERFORMANCE, MILK FATTY ACID PROFILES, OXIDATIVE STATUS, AND PROTEOMES
… animals and can also affect human health – the primary consumers of animal products. In recent years, lowering the ratio between ω6 and ω3 PUFAs in animal diets has gained increasing attention as a nutritional intervention to enhance performance and health. This thesis aimed to improve growth …