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| Titel |
Accumulation of DOC in Low Phosphate Low Chlorophyll (LPLC) area: is it related to higher production under high N:P ratio? |
| VerfasserIn |
R. Mauriac, T. Moutin, M. Baklouti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 4 ; Nr. 8, no. 4 (2011-04-15), S.933-950 |
| Datensatznummer |
250005694
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| Publikation (Nr.) |
 copernicus.org/bg-8-933-2011.pdf |
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| Zusammenfassung |
| The biogeochemistry of carbon and nutrients (N,P) in the surface layer of the
ocean strongly depends on the complex interactions between primary producers
(phytoplankton) and remineralizers (heterotrophic bacteria). To understand
how these interactions impact the overall DOC dynamics in the surface layer
of the Mediterranean Sea, we implemented, using Eco3M (Ecological Mechanistic
Modular Modelling tool), a multi-element model with a mechanistic description
of primary production. We studied the model steady state results under
various nutrient conditions and fixed cell abundances. By doing so, we show
how the bottom up control of osmotrophs growth can impact the overall DOC
dynamics in the system. Based on our set of parameters, the biogeochemical
characteristics displayed by the model appear realistic when compared to
literature data for the Mediterranean basin. Differences in DOC dynamics
between N and P limited systems in the model, lead to the conclusion that the
unusually high N:P ratio of the Mediterranean Sea may favour the uncoupling
between growth and carbon production leading to higher DOC accumulation
compared to systems with lower N:P ratio. |
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