Phosphogenesis in coastal upwelling systems [Elektronische Ressource] : bacterially-induced phosphorite formation / von Esther Arning

Esther Chamberlain

Informations

• Publié par: universitat_bremen
• Publié le: 01 janvier 2008
• Nombre de lectures: 21
• Langue: English
• Poids de l'ouvrage: 25 Mo

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Gutachter: Prof. Dr. Jörn Peckmann
Prof. Dr. Heide Schulz-Vogt
Tag des Promotionskolloquiums: 8.12.2008
Prüfer: PD Dr. Matthias Zabel
Prof. Dr. Wolfgang Bach
Gib jedem Tag die Chance,
der schönste deines Lebens zu werden.
Mark Twain

The work presented in this thesis was funded by the Deutsche Forschungsgemeinschaft in the
research area “Biogeochemical processes” as part of the project “Bacterial control of
phosphorite formation in coastal upwelling systems” of the Excellence Cluster MARUM at
the University of Bremen. This work was prepared from September 2005 until September
2008 in the Geobiology Group, University of Bremen and has been supervised by Prof. Dr.
Jörn Peckmann.
With this thesis, it is my goal to demonstrate the importance of microorganisms in
phosphorite formation in coastal upwelling systems. To elucidate this, recent phosphogenic
sediments from upwelling areas (paper 1, published in Geomicrobiology Journal) as well as
authigenic phosphorite crusts from the upwelling area off Peru (papers 2 and 3, both
submitted to international journals) were studied. In addition, the thesis comprises one
manuscript (paper 4, draft, not yet submitted), which examines microbial processes in the
formation of dolomites from the Miocene Monterey Formation, a prominent phosphorite
deposit in the Miocene. The scientific framework of the manuscripts and a general
introduction into the subject of phosphorite formation is given in chapter I. In the
“Concluding remarks and perspectives” the main results are summarized, remaining open
questions are addressed, and perspectives for potential future work are proposed. References
to the literature for chapter I and for the “Concluding remarks and perspectives” are given at
the end of this thesis.