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 73 for “"microbial processes"”.
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Nutrient fluxes and soil microbial processes
… species on nutrient cycling, soil properties and microbial activities. In this study, six broadleaved species were growing at the same site with similar condition in terms of soil type, land use history and climate. Thus, the potential effects on biogeochemical cycling could be attributed to tree …
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Observing microbial processes at the microscale with in situ technology
… with numerous biological and physical processes giving rise to resource hotspots where nutrient concentrations exceed background levels by orders of magnitude. While the impact of this microscale heterogeneity has been investigated in the laboratory with microbial isolates and …
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Observing microbial processes at the microscale with In Situ technology
… with numerous biological and physical processes giving rise to resource hotspots where nutrient concentrations exceed background levels by orders of magnitude. While the impact of this microscale heterogeneity has been investigated in the laboratory with microbial isolates and …
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Relating Biological Rate Measurements and Microbial Processes Across Diverse Ocean Ecosystems
… in driving patterns of important biogeochemical processes including primary production across the global ocean. Despite the importance of such interactions between the marine microbial community and ocean biogeochemistry, oceanographers have yet to attain a deep understanding of the ecological …
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Effects of Elevated Atmospheric CO₂ on Scrub-Oak Root Carbon Pools and Soil Microbial Processes
… the sequestration of C belowground and the microbial processes that control C retention in the soil. This study was conducted in a Florida scrub-oak ecosystem, where CO<sub>2</sub> levels have been elevated to twice ambient since 1996 in open top chambers. There were eight replicates of …
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The effects of temperature and moisture on alpine microbial processes across a gradient of soil development
… introducing bioavailable nutrients. Because microbial communities are important drivers of nutrient cycling and ecosystem function in the alpine, and because temperature, moisture and nutrient availability are primary controls of microbial abundance and activity, it is likely that microbial …
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Potential Microbial Processes In An Ancient Martian Environment, An Investigation Into Bio-Signature Production And Community Ecology
… and examined the whether an understanding of microbial processes could inform future life detection missions on Mars. The subsurface environment of the River Dee estuary, UK, and its microbial community, was characterised and compared to the palaeolake at Gale Crater, Mars. Similarities were …
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Anaerobic Dissipation of Herbicides in Microbiologically Induced Soil Redox Regimes
… of redox conditions and corresponding anaerobic microbial processes on herbicide mineralization and bound residue formation as routes of dissipation. Herbicide fate was evaluated by quantifying the distribution of radiolabeled material in the mineralized, aqueous (parent and metabolite), sorbed …
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Entwicklung einer Technologie zur langzeitstabilen Biologischen Reinigung schwermetallbelasteter Bergbauwässer
… technology is based on the technical coupling of microbially mediated hydrolysis, fermentation and microbial sulphate reduction in a self-stabilising process. Electron donor for sulphate reduction is supplied by degradation of a solid substrate (silage). Elimination of metals is primarily achieved …
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Effects of simulated acidic precipitation on the colonization and ice nucleation activity of Pseudomonas syringae pv. syringae and Erwinia herbicola
… has an overall inhibitory influence on soil microbial processes. The effect acidic precipitation may have on epiphytic microorganisms has not been examined. Bacteria are among the most numerous residents on the phylloplane.
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Closing the knowledge gap surrounding nitrogen cycling in Minnesota lakes
… how those inputs interact with internal processes to characterize future N scenarios. Microbial processes such as N fixation and denitrification can add or remove N and understanding when and where these processes occur is essential to managing N in lakes. We demonstrated recently that …
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Mathematical Modelling of Tower Fermentation Processes
… currently concerned with a number of large-scale processes, including single cell protein production, effluent treatment, and the production of alcoholic beverages. Successful design and optimisation of these new systems is becoming increasingly dependent upon the availability of mathematical …
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Physical ecology of marine microbes
… While their importance is global in scale, microbial processes unfold at the level of single cells and are intimately dependent on interactions between microorganisms, their neighbors, and the surrounding physical and chemical environment. Furthermore, traditional imaging techniques often …
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Speciation and microbial transformation of chromium, arsenic and mercury in municipal landfill leachate
… in municipal landfill leachate (MLL) to evaluate microbial transformation of the heavy metals in the landfill system. MLL is a complex matrix that contains multiple inorganic and organic contaminants, as well as a consortium of bacteria in an environment of changing pH and redox potential. …
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Sulfur, carbon, and oxygen isotopes of coexisting sulfides and carbonates in gas and oil seeps from the Gulf of Mexico
Microbial processes consisting of bacterial sulfate reduction (BSR), bacterial disproportionation of sulfur (BDS), and BSR coupled with anaerobic oxidation of methane (BSR-AOM) occur in the Gulf of Mexico (GOM) at sites where hydrocarbon oil and gas seep through conduits to the seafloor. Thus far, …
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Dynamics of cicrobial communities associated with <i>Typha angustifolia</i> (cattail) litter in a wetland ecosystem: Effects of litter manipulations on microbial decay processes
<p>Quantification of microbial processes involved in plant decomposition is important in understanding energy flow and nutrient recycling in wetlands. Prior studies examining emergent plant decomposition have often used litter that had been prematurely harvested (senescent) and/or manipulated …
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Characteristics of cone-forming cyanobacteria and implications for the origin of conical stromatolites
… shapes that arise uniquely as a consequence of microbial processes. Our investigation aims to understand the biological factors in the formation of conical structures and stromatolites. To elucidate the role of the cyanobacteria, we enrich cyanobacteria from modern hot-spring communities of …
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Ecological restoration of lead/zinc/copper mine tailings: Phytomanagement and amendment strategies to enhance substrate functionality and biomass production
… characteristics of mine tailings inhibit microbial processes and natural plant growth. Consequently, vast and numerous tailings sites remain barren for decades and highly susceptible to wind and water erosion. Phytostabilization is a cost-effective and ecologically productive remediation …
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A generic approach to environmental assessment of microbial bioprocesses through life cycle assessment (LCA)
… environmental advantages of industrial scale bioprocesses over chemical processes remain a discussion point owing to limited objective analysis. Studies to date are often limited to energy or global warming considerations with little regard for full Life Cycle Assessment (LCA) analyses. This, in …
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Assessment of a Passive Sampler for Aquifer Microbial Community Profiling and Comparison of Porous Media
… aquifer depletion; however, its impact on native microbial communities remains insufficiently characterized. Concerns include the potential introduction of pathogens, antibiotic resistance genes (ARGs), and trace organic pollutants, as well as the disruption of native microbial processes critical …
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