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.
Results
Showing 1 to 20 of 188 for “"bacterial community"”.
-
Hypolimnetic oxygen decline and the hypolimnetic bacterial community.
This study reports on bacterial cell size and abundance change during oxygen depletion of Belton and Stillhouse Hollow reservoir. Bacterial cell size and abundance are compared with amount of heterotrophic nanoflagellates, dissolved oxygen, temperature, and time. The Relative Areal Hypolimnetic …
-
Profiling Bacterial Community Dynamics For Wildlife Ecology and Geological Mineral Exploration
Bacterial communities are dynamic biological systems with complex metabolic interactions that influence ecological functions across a broad range of microbiome environments. Bacterial community 16S rRNA gene amplicon sequencing is an approach to microbiome exploration that profiles community …
-
Conservation Of The Intracellular Bacterial Community Pathogenic Pathway In Urinary Tract Infection
… in which they invade and form intracellular bacterial communities: IBCs) within bladder facet cells. Type 1 pili, adhesive fimbriae, are necessary for UPEC binding and invasion of urothelial cells and formation of IBCs. UPEC ultimately disperse from the IBC, many with filamentous morphology, …
-
Culture-independent analysis of the bacterial community shifts in a macroalgal disease
… has been implied by difference in the microbial community composition between healthy and bleached algae and by two bacterial strains that can cause bleaching in vitro. In the present thesis, deep-sequencing of the 16S rRNA gene detected operational taxonomic units (OTUs) matching with 100% …
-
Changes in archaeal and bacterial community composition following entombment in halite crystals
… of 21-weeks. Quantification of archaeal and bacterial numbers showed that Archaea are exceptionally more abundant in both brine and halite, and that Bacteria are about 0.25% of the overall community in both conditions. Remarkably, few differences were observed in terms of abundance and …
-
Investigation of bacterial community composition and abundance in a lowland arable catchment
This study aimed to characterise the bacterial community composition and abundance in the River Wensum in Norfolk using epifluorescence microscopy (EFM), automated ribosomal intergenic analysis (ARISA) and 454 pyrosequencing. It also aimed to determine the effects of spatial and temporal variations …
-
Investigating the effect of phytoplankton on bacterial community composition across different environmental contexts
… seasonal succession effects changes in bacterial community composition and characterizing interactions between phytoplankton and bacteria across different environmental contexts. Observational and experimental approaches were combined to determine the effect of phytoplankton on the …
-
Investigating exudate- and habitat-mediated effects of phytoplankton on lake bacterial community dynamics
… are commonly observed between phytoplankton and bacterial communities. There are a number of potential explanations for correlated dynamics. Recent observations of temporal succession in lake microbial communities provide evidence for phytoplankton populations acting as biological drivers …
-
Bacterial community composition in stream biofilms is influenced by algal response to varying light and phosphorus ratios
Strong correlations between bacterial communities and algal seasonal succession have been previously observed. In aquatic systems, dissolved organic carbon derived by algae is an important resource for bacteria. Light and phosphorus availability are two factors that influence biomass and abundance …
-
The Effects of Temperatures on System Performance and Bacterial Community Structure in a Biological Phosphorus Removal System
… acclimated to 20°C had a much more diverse bacterial population than the biomass acclimated to 5°C. However, no GAO population was detected in electron microscopy samples under any temperature conditions. The decreased P removal efficiency at 20°C was then attributed to the presence of …
-
Experimental litterfall manipulation effects on soil bacterial community structure and soil carbon cycling in a wet tropical forest
… detrital C inputs on belowground microbial community function, C cycling and fluxes remain largely unknown, especially in tropical forest ecosystems. To investigate how shifts in bacterial community composition resulting from differences in C availability affect organic matter decomposition …
-
Experimental litterfall manipulation effects on soil bacterial community structure and soil carbon cycling in a wet tropical forest
… detrital C inputs on belowground microbial community function, C cycling and fluxes remain largely unknown, especially in tropical forest ecosystems. To investigate how shifts in bacterial community composition resulting from differences in C availability affect organic matter decomposition …
-
Influence of vegetation on sediment bacterial community structure, microbial enzyme activities and phosphorus retention in constructed freshwater wetlands
… focuses on the influence of vegetation on bacterial community structure, microbial enzyme activities, and phosphorus retention capacity of constructed wetland systems. A greenhouse experiment was conducted using unvegetated or vegetated mesocosms with Juncus effusus, Carex lurida or …
-
Effect of Standard Post-harvest Interventions of Fresh Vegetables on Bacterial Community Dynamics, Pathogen Survival and Antibiotic Resistance
… is an established source of pathogenic bacterial contamination. However, less is known about whether such soil amendments could serve as a source of transmission of antibiotic-resistant bacteria (ARB) or antibiotic-resistance genes (ARGs) via fresh produce. As such knowledge is …
-
The Influence of Land Coverage and Soil Chemical Factors on Soil Bacterial Community Diversity and Structure in Cedartown, GA, USA
… metal stress, but the response of different bacterial groups may vary depending on the level and type of heavy metal contamination. When subjected to heavy metal stress, many bacterial species or populations may become extirpated, while some may survive to form the foundations of a new …
Page 1 of 10