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 9 of 9 for “"microbial biogeography"”.
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How Historic Shipwrecks Influence Dispersal of Deep-Sea Microbiomes
… in ecology, specifically the Theory of Island Biogeography and the Wooden Stepping Stone hypothesis. These have not been investigated for microorganisms, and thus this work will probe if they are applicable to microbial biogeography in this habitat. Experiments were conducted to establish new …
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Site effects on wildlife enteric bacterial diversity: you are where you eat?
The study of microbial biogeography has made vast strides in recent years due, in part, to advances in the technological capacity to document microscopic biodiversity at the community, population and genomic levels. In this dissertation, we apply a combination of molecular and cultivation …
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Long Range Transport of Microorganisms in the Upper Atmosphere
… arrive from distant, transpacific sources. Microbial abundance and richness values were derived from qPCR measurements and 16S rRNA microarray analysis. Thousands of distinct bacterial taxa (and 6 archaeal species) were detected in Asian air samples, spanning a wide range of phyla and …
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THE ROLE OF SPATIAL SCALES IN BIOGEOGRAPHY AND EVOLUTION OF SOIL-BORNE STREPTOMYCES
… fauna, and ecosystem resilience and stability. Microbial biogeography allows us to understand how communities form and change over evolutionary time. My dissertation investigates the biogeography and population dynamics of soil bacteria using the genus Streptomyces as a model system. …
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Environmental Controls Over the Distribution and Function of Antarctic Soil Microbial Communities
Microbial community composition plays a vital role in soil biogeochemical cycling. Information that explains the biogeography of microorganisms is consequently necessary for predicting the timing and magnitude of important ecosystem services mediated by soil biota, such as decomposition and …
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Physiological and Phylogenetic Studies of the Biogeography of Alkaliphilic Heterotrophic Bacteria from Serpentinizing Habitats
… hydrogen. Hydrogen provides an energy source for microbial metabolism and in combination with mineral catalysts can lead to the abiogenic synthesis of small organic compounds, such as methane. Serpentinite habitats contain abundant potential electron donors, but microorganisms presumably have …
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Bacterial Assemblages And Microbial Enzyme Activity In The Major Tributaries Of The Lower Mississippi River
… the dynamic worldwide patterns of bacterial biogeography; however, there are still many ecosystems for which there is little to no representative data. Currently there are no high throughput-based analyses of bacterial assemblages in large rivers. Rivers form important connections between …
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Landscape history and contemporary environmental drivers of microbial community structure and function
Recent work in microbial ecology has focused on elucidating controls over biogeographic patterns and connecting microbial community composition to ecosystem function. My objective was to investigate the relative influences of landscape legacies and contemporary environmental factors on the …
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Below- and aboveground farmland biodiversity in relation to local and regional management
Die Ausdehnung von Ackerland, Plantagen und Weideland in den letzten Jahrzehnten sowie die Intensivierung der Landwirtschaft auf lokaler und regionaler Ebene sind Hauptgründe für den Biodiversitätsverlust. Intensivierung auf lokaler Ebene ist durch einen vermehrten Einsatz von Maschinen, Spritz- …