Sökning: "Aphanizomenon"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet Aphanizomenon.

  1. 1. External Growth Control of Baltic Sea Cyanobacteria

    Författare :Anna Zakrisson; Ulf Larsson; Jakob Walve; Elena Gorokhova; Sanna Suikkanen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; cyanobacteria; nitrogen fixation; heterocysts; Aphanizomenon; Nodularia; water treatment; Himmerfjärden; sewage; climate; marin ekologi; Marine Ecology;

    Sammanfattning : In the Himmerfjärden Bay a large excess of nitrogen over phosphorus in the discharge from a large sewage treatment plant (STP) has suppressed growth of diazotrophic cyanobacteria in its inner parts. Implementation of nitrogen removal in the STP in 1997 drastically reduced nitrogen load and triggered growth of diazotrophs, mainly Aphanizomenon sp. LÄS MER

  2. 2. On the ecophysiology of Baltic cyanobacteria focusing on bottom-up factors

    Detta är en avhandling från Göteborg : University of Gothenburg

    Författare :Malin Mohlin; Göteborgs universitet.; Gothenburg University.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Allelopathy; Aphanizomenon sp.; Baltic Sea; Cyanobacteria; Diazotrophic; Multi-factorial; Nitrogen; Nodularin; photosynthetic active radiation; Phosphorus; ultraviolet radiation; UV-A; UV-B;

    Sammanfattning : Cyanobacterial blooms in the Baltic Sea are dominated by diazotrophic cyanobacteria, i.e. Aphanizomenon sp. and Nodularia spumigena. LÄS MER

  3. 3. Filamentous cyanobacteria in the Baltic Sea - spatiotemporal patterns and nitrogen fixation

    Detta är en avhandling från Stockholm : Systemekologiska institutionen

    Författare :Lisa Almesjö; Ragnar Elmgren; Norbert Wasmund; [2007]
    Nyckelord :Aphanizomenon sp.; Nodularia spumigena; Baltic Sea; image analysis; spatial variability; nitrogen fixation; vertical migration; marin ekologi; Marine Ecology;

    Sammanfattning : Summer blooms of filamentous, diazotrophic cyanobacteria are typical of the Baltic Sea Proper, and are dominated by Aphanizomenon sp. and the toxic Nodularia spumigena. Although occurring every summer, the blooms vary greatly in timing and spatial distribution, making monitoring difficult and imprecise. LÄS MER

  4. 4. Ecophysiological characteristics of the Baltic Sea N₂-fixing cyanobacteria Aphanizomenon and Nodularia

    Detta är en avhandling från Stockholm : Stockholm University

    Författare :Jenny Degerholm; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cyanobacteria; Cyanobakterier;

    Sammanfattning : .... LÄS MER

  5. 5. Studies on the Life Cycles of Akinete Forming Cyanobacteria

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Irene Karlsson Elfgren; Kurt Pettersson; Peter Blomqvist; Tore Lindholm; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; limnology; akinete; germination; recruitment; Biologi; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; limnologi; Limnology;

    Sammanfattning : Cyanobacteria which can form resting cells (in this case akinetes) are common in meso-eutrophic lakes in temperate regions, often dominating the phytoplankton communities during summer. The life cycles of akinete-forming cyanobacteria has been studied with Gloeotrichia echinulata as a model organism. LÄS MER