Regional and global scale modeling of the benthic marine nitrogen cycle.

Bohlen, Lisa (2011) Regional and global scale modeling of the benthic marine nitrogen cycle. (Doctoral thesis/PhD), Christian-Albrechts-Universität Kiel, Kiel, Germany, 133 pp.

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Abstract

The benthic nitrogen (N) cycle is highly dynamic and diverse due to the strong redox gradients occurring in marine surface sediments and the variety of oxidation states accessible to nitrogen. Since N is a limiting nutrient for biological productivity, fluxes of nitrogenous species across the sediment-water interface may strongly affect the biogeochemistry of nitrogen, carbon and phosphorus in the oceanic water column. In particular, as a major sink for fixed N in the marine environment, benthic denitrification has a profound impact on the availability of bioavailable N in the oceans. Consequently, an understanding of N cycling in marine sediments is of major importance for constraining the global marine nitrogen budget and quantifying benthic-pelagic feedbacks. The thesis addresses benthic N turnover on local and global scales with a special focus on oxygen minimum zones where strong lateral redox gradients lead to unique and highly interesting interactions in N cycling.

Document Type: Thesis (Doctoral thesis/PhD)
Thesis Advisors: Wallmann, Klaus and Oschlies, Andreas
Keywords: marine sediment, nitrogen cycle, modeling; marine Sedimente, Stickstoffkreislauf, Modellierung
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > SFB 754 > B5
OceanRep > SFB 754 > B1
OceanRep > SFB 754
Open Access Journal?: Yes
Projects: SFB754
Date Deposited: 06 Mar 2015 09:34
Last Modified: 30 Apr 2015 12:27
URI: http://oceanrep.geomar.de/id/eprint/27887

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