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  • GEOMAR Helmholtz Centre for Ocean Research Kiel  (2)
  • Kiel : Inst. für Meereskunde  (2)
  • 1
    Book
    Book
    Kiel : Inst. für Meereskunde
    Keywords: Report ; Dissertation ; Forschungsbericht ; Hochschulschrift
    Type of Medium: Book
    Pages: 145 S , Ill., graph. Darst
    Series Statement: Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel 300
    Language: German
    Note: Literaturverz. S. 137 - 144 , Zugl.: Kiel, Univ., Diss., 1998
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  • 2
    Online Resource
    Online Resource
    Kiel : Inst. für Meereskunde
    Keywords: Report ; Dissertation ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: Online-Ressource (148 Seiten, 7 MB) , Illustrationen, Diagramme, Karten
    Series Statement: Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel 300
    Language: German
    Note: Zusammenfassung in deutscher und englischer Sprache
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  • 3
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    GEOMAR Helmholtz Centre for Ocean Research Kiel
    In:  Alkor-Berichte, AL523-2 . GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, 22 pp.
    Publication Date: 2021-01-29
    Type: Report , NonPeerReviewed
    Format: text
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  • 4
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    GEOMAR Helmholtz Centre for Ocean Research Kiel
    In:  GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, 18 pp.
    Publication Date: 2015-12-10
    Description: Objectives of the cruise The Baltic Sea is a marine ecosystem exposed to multiple stressors. Eutrophication sustains high phytoplankton productivity that fuels high oxygen demands in deeper waters. As a consequence of increasing biological oxygen consumption and high CO2 production, the expansion of hypoxic zones in the Baltic Sea has been predicted. A major process contributing to the consumption of oxygen is the microbial respiration of dissolved organic matter. Hence, the microbial production of organic matter and its subsequent remineralization are biological processes with a high potential to co-determine the direction and magnitude of future oxygen and pH changes in the Baltic Sea. However, little is known about how high nutrient loads and seawater CO2 concentration affect phytoplankton productivity. Furthermore, the relevance of organic matter composition, seawater pH and oxygen availability for carbon remineralization are largely unexplored. The proposed cruise aims at studying the production, composition and degradation of particulate and dissolved organic matter along natural gradients of inorganic nutrients, oxygen and seawater CO2 in the Baltic Sea. The cruise AL458 crossed the Southern Baltic Proper, the deep Gotland Basin and the Gulf of Riga. Sampling of depth profiles along transects was combined with onboard experiments that investigated (i) effects of oxygen concentration and organic matter composition on the bacterial turnover of dissolved organic matter (ii) effects of labile organic matter and nutrients on microbial activities under oxic and anoxic conditions (iii) degradation of halocarbons by microbial communities. The combination of field work and onboard experiments will help to better explain the environmental control of microbial processes and the contribution of microbial activity to organic carbon cycling in the Baltic Sea. In addition this cruise was part of the master program Biological Oceanography MNF-bioc.-201 (C2). Four students participated in the cruise.
    Type: Report , NonPeerReviewed
    Format: text
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