Sökning: "marine bacteria"

Visar resultat 1 - 5 av 76 avhandlingar innehållade orden marine bacteria.

  1. 1. Predation on marine pelagic bacteria : On the in situ rates, regulation and dynamics of bacterivory studied with a molecular genetic technique

    Författare :Johan Wikner; Åke Hagström; Caron David; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Marine; grazing; minicells; molecular genetics; method; predation rate; dynamics; bacterivore; predator-prey; mikrobiologi; Microbiology;

    Sammanfattning : .... LÄS MER

  2. 2. Distribution and activity of nitrogen-fixing bacteria in marine and estuarine waters

    Författare :Hanna Farnelid; Lasse Riemann; Jonathan Zehr; Linnéuniversitetet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; 454-pyrosequencing; diazotrophs; heterotrophic bacteria; marine bacteria; marine microbial ecology; microbiology; nifH; nitrogenase; nitrogen fixation; PCR; qPCR; Mikrobiologi; Microbiology;

    Sammanfattning : In aquatic environments the availability of nitrogen (N) generally limits primary production. N2-fixing prokaryotes (diazotrophs) can convert N2 gas into ammonium and provide significant input of N into the oceans. Cyanobacteria are thought to be the main N2-fixers but diazotrophs also include a wide range of heterotrophic bacteria. LÄS MER

  3. 3. Functional Profiling Of Metabolic Regulation In Marine Bacteria

    Författare :Sarala Devi Muthusamy; Jarone Pinhassi; Torsten Thomas; Saraladevi Muthusamy; Linnéuniversitetet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; marine microbiology; physiology; heterotrophic bacteria; adaptive strategies; survival; proteomics; growth phase; proteorhodopsin; inorganic sulphur oxidation; anaplerotic CO2 fixation; Miljövetenskap; Environmental Science;

    Sammanfattning : Oceans are powered by active, metabolically diverse microorganisms, which are important in regulating biogeochemical cycles on Earth. Most of the ocean surface is often limited by nutrients, influencing bacterial growth and activities. LÄS MER

  4. 4. Interactions between Bacteria and Fungi on Aquatic Detritus – Causes and Consequences

    Författare :Cecilia Mille-Lindblom; Lars Tranvik; Helmut Fischer; Eric Chauvet; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Ecology; bacteria; fungi; decomposition; antagonism; extracellular enzymes; competition; macrophytes; dissolved organic carbon DOC ; ergosterol; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

    Sammanfattning : Bacteria and fungi dominate the decomposition of aquatic plants, a major process in the carbon and nutrient cycling in many aquatic systems. Although phylogenetically distant, bacteria and fungi often live in close proximity with each other. Since these microorganisms also have similar ecological functions, interactions have developed between them. LÄS MER

  5. 5. Exploring gene expression responses of marine bacteria to environmental factors

    Författare :Christofer Osbeck; Jarone Pinhassi; Michael Cunliffe; Linnéuniversitetet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; dissolved organic matter; model bacteria; ocean acidification; organic pollutants; river loadings; transcriptomics; Mikrobiologi; Microbiology;

    Sammanfattning : Bacterioplankton are abundant in marine ecosystems, where they as “masters of transformation” of dissolved organic matter (DOM) are important for energy fluxes and biogeochemical cycles. However, the performance of bacteria in a changing marine environment influenced by anthropogenic activities is poorly understood. LÄS MER