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Thematische Bibliographien / Oligotrophic bacteria / Dissertationen

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Dissertationen zum Thema „Oligotrophic bacteria“

Autor: Grafiati

Veröffentlicht am 18. Mai 2024

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1

Machelett, Moritz Maximilian. "Nutrient uptake by oceanic oligotrophic bacteria." Thesis, University of Southampton, 2017. https://eprints.soton.ac.uk/418021/.

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The oligotrophic ubiquitous SAR11 clade of alphaproteobacteria and Prochlorococcus cyanobacteria numerically dominate bacterioplankton that drives the ecosystems of the five subtropical oceanic gyres, which cumulatively cover 40% of earth. Common gyre features like extremely low nutrient and chlorophyll concentrations as well as dominance of obligate oligotrophs suggest that the gyre ecosystems are uniform and function at the same pace. Competition in oligotrophic environment should favour optimisation of surface to volume ratio and selection for eÿcient high aÿnity transporters, which could b

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2

Kumar, Arvind. "Studies on oligotrophic bacteria of river Mahananda of northern West Bengal with special emphasis on mics of integrons." Thesis, University of North Bengal, 2012. http://hdl.handle.net/123456789/1478.

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3

West, A. J. "Physiology and cell size of oligotrophic and copiotrophic aquatic bacteria." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384161.

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4

Al-Talhi, Abdullah Dakheel D. "Environmental and medical studies on microbial growth under low nutrient (oligotrophic) conditions." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340132.

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5

Ostrowski, Martin Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Physiological adaptation to nutrient limitation in a marine oligotrophic ultramicrobacterium Sphingopyxis alaskensis." Awarded by:University of New South Wales. School of Biotechnology and Biomolecular Sciences, 2006. http://handle.unsw.edu.au/1959.4/27422.

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Sphingopyxis (formerly Sphingomonas) alaskensis, a numerically abundant species isolated from Alaskan waters and the North Sea represents one of the only pure cultures of a typical oligotrophic ultramicrobacterium isolated from the marine environment. In this study, physiological and molecular characterization of an extinction dilution isolate from the North Pacific indicate that it is a strain of Sphingopyxis alaskenis, extending the known geographical distribution of this strain and affirming its importance as a model marine oligotroph. Given the importance of open ocean systems in climatic

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Matallana, Surget Sabine-Astrid Biotechnology &amp Biomolecular Sciences Faculty of Science UNSW. "Physiological and molecular responses of the marine oligotrophic ultramicrobacterium Sphingopyxis Alaskensis rb2256 to visible light and ultraviolet radiation." Awarded By:University of New South Wales. Biotechnology & Biomolecular Sciences, 2009. http://handle.unsw.edu.au/1959.4/43251.

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Ultraviolet radiation reaching the Earths surface (UVR, 280-400 nm) may penetrate deep into the clear oligotrophic waters influencing a large part of the euphotic layer. Marine heterotrophic bacteria at the surface of the oceans are especially sensitive to the damaging solar radiation due to their haploid genome with little or no functional redundancy and lack of protective pigmentation. In a context of climate change and ozone depletion, it is clearly important to understand the physiology and underlying molecular UVR responses of abundant marine bacteria species. We chose the marine ultrami

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Mandal, Amit Kumar. "Exploring physiology of an exopolysaccharide(EPS) producing facultatively oligotrophic bacterium klebsileea pneumoniae pb12 with special emphasis on structure -function analysis of EPS." Thesis, University of North Bengal, 2015. http://ir.nbu.ac.in/hdl.handle.net/123456789/2755.

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8

Walters, Evelyn [Verfasser], Harald [Akademischer Betreuer] Horn, Hilde [Akademischer Betreuer] Lemmer, and Peter [Akademischer Betreuer] Rutschmann. "Fate and Transport of Fecal Indicator Bacteria in Flume Systems Mimicking an Oligotrophic River / Evelyn Walters. Gutachter: Harald Horn ; Hilde Lemmer ; Peter Rutschmann. Betreuer: Harald Horn." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1045730157/34.

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9

Wenzel, Anja. "The role of terrestrial and phytoplankton-derived organic matter in planktonic food webs." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-62287.

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Lakes are important global ecosystems and many of them are nutrient-poor (unproductive). Especially in northern boreal latitudes, lakes may be heavily subsidized by terrestrial organic material (t-OM) from peat layers in the catchment. Thus, in addition to heterotrophic bacteria and phytoplankton, zooplankton may also use the particulate fraction of peat layer t-OM (t-POM) as a potential food source in those systems. Inputs of t-OM in northern latitudes are anticipated to increase in the future due to increasing precipitation and temperature. As t-OM is a good substrate for bacterial growth an

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Gammack, Graham F. "Bacterial attachment and activity in oligotrophic environments." Thesis, Heriot-Watt University, 1988. http://hdl.handle.net/10399/991.

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11

Kiger, Amber A. "Changing Bacterial Growth Efficiencies across a Natural Nutrient Gradient in an Oligotrophic Estuary." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/1758.

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Recent studies have characterized coastal estuarine systems as important components of the global carbon cycle. This study investigated carbon cycling through the microbial loop of Florida Bay by use of bacterial growth efficiency calculations. Bacterial production, bacterial respiration, and other environmental parameters were measured at three sites located along a historic phosphorus-limitation gradient in Florida Bay and compared to a relatively nutrient enriched site in Biscayne Bay. A new method for measuring bacterial respiration in oligotrophic waters involving tracing respiration of 1

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An, Shu. "Characterization of bacterial diversity in three oligotrophic environments using high-throughput sequencing technology." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00859417.

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Oligotrophic ecosystems can be loosely defined as environments that exhibit low ambient nutrient levels. During my thesis, I used 454 DNA pyrosequencing of partial 16S rDNA to explore the bacterial diversity in three different oligotrophic environments, including A. surface desert soil, B. Asian sandstorm dust and C. a section of the city of Paris's drinking water distribution system.A. Arid regions represent nearly 30% of the Earth's terrestrial surface. The living conditions at the surface of deserts are a challenge for microorganisms, as there is little available water and/or carbon, a very

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Neilson, Julia Worsley. "Bacterial Diversity of the Atacama Desert, Chile: The Challenges of Characterizing the Community Dynamics of Extreme Oligotrophic Ecosystems." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242364.

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This dissertation examines the bacterial diversity of hyperarid and arid regions of the Atacama Desert, Chile, as a first step towards understanding the global biogeochemical significance of arid-land microbial communities. The specific objectives were to characterize bacterial diversity and infer the possible metabolic potential of these bacterial communities, and to evaluate the influence of moisture exposure on community structure. In addition, the strengths and limitations of available tools for probing microbial diversity and activity in terrestrial ecosystems were characterized for the

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Osman, Naoum Jorge. "Étude des populations bactériennes des écosystèmes des sols oligotrophes en utilisant des technologies de séquençage à haut débit." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS196/document.

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"Où peut-on trouver des microbes, et comment survivent-ils dans ces lieux ?" sont des questions essentielles afin de comprendre la vie sur Terre. Les populations bactériennes du sol sont connues pour jouer un rôle important dans les cycles biogéochimiques, l'entretien des sols, les effets climatiques et l'agriculture.Dans ce travail, j'ai utilisé la technique de pyroséquençage, via le produit d’une PCR d’ADNr 16S amplifiée extraite d’ADN totale, afin de révéler les populations bactériennes présentes dans quatre environnements inhabituels et oligotrophes différents:A. Les écosystèmes saumâtres

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Bondarev, Vladimir [Verfasser], Heide [Akademischer Betreuer] Schulz-Vogt, and Ulrich [Akademischer Betreuer] Fischer. "Physiology of Pseudovibrio sp. FO-BEG1 - a facultatively oligotrophic and metabolically versatile bacterium / Vladimir Bondarev. Gutachter: Heide Schulz-Vogt ; Ulrich Fischer. Betreuer: Heide Schulz-Vogt." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1071994034/34.

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Schwedt, Anne [Verfasser], Heide [Akademischer Betreuer] Schulz-Vogt, and Ulrich [Akademischer Betreuer] Fischer. "Physiology of a marine Beggiatoa strain and the accompanying organism Pseudovibrio sp. - a facultatively oligotrophic bacterium / Anne Schwedt. Gutachter: Heide Schulz-Vogt ; Ulrich Fischer. Betreuer: Heide Schulz-Vogt." Bremen : Staats- und Universitätsbibliothek Bremen, 2011. http://d-nb.info/1071992864/34.

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17

Bade, Karen [Verfasser]. "Survival of sulfate reducing bacteria in oxic oligotrophic environments related to drinking water / vorgelegt von Karen Bade." 2000. http://d-nb.info/960401288/34.

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18

Jimenez, Infante Francy M. "How do Bacteria Adapt to the Red Sea? Cultivation and Genomic and Physiological Characterization of Oligotrophic Bacteria of the PS1, OM43, and SAR11 Clades." Diss., 2015. http://hdl.handle.net/10754/552701.

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Given the high salinity, prevailing annual high temperatures, and ultra-oligotrophic conditions in the Red Sea isolation and characterization of important microbial groups thriving in this environment is important in understanding the ecological significance and metabolic capabilities of these communities. By using a high-throughput cultivation technique in natural seawater amended with minute amounts of nutrients, members of the rare biosphere (PS1), methylotrophic Betaproteobacteria (OM43), and the ubiquitous and abundant S

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Shin, Eun Jung. "Characterization of novel marine oligotrophic bacteria isolated from the Pacific Ocean : description of Marinivirgula fluito gen. nov., sp. nov., Marinivirgula obesa gen. nov., sp. nov. and Litincola parvulus gen. nov., sp. nov." Thesis, 2003. http://hdl.handle.net/1957/30417.

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20

Massé, Stéphanie. "Dynamique saisonnière des communautés nitrifiantes dans un petit lac oligotrophe." Thèse, 2015. http://hdl.handle.net/1866/12479.

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Depuis la découverte d’archées capables d’oxyder l’ammoniac en milieu aérobie, de nombreuses études ont mesuré en simultané les taux de nitrification et la diversité des organismes oxydant l’ammoniac dans la colonne d’eau des milieux marins. Malgré l’importance globale des lacs d’eau douce, beaucoup moins d’études ont fait la même chose dans ces milieux. Dans cette étude, nous avons évalué l’importance de la nitrification et caractérisé la communauté microbienne responsable de la première étape limitante de la nitrification dans un lac tempéré durant une année entière. L’utilisation de traceur

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