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| Titel |
Modeling the coupling of ocean ecology and biogeochemistry |
| VerfasserIn |
S. Dutkiewicz, M. J. Follows, J. G. Bragg |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250021821
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| Zusammenfassung |
| We examine the interplay between ecology and biogeochemical cycles in the
context of a global three-dimensional ocean model where self-assembling
phytoplankton communities emerge from a wide set of potentially viable cell
types. The simulations have clear and plausible organization of the emergent
community structure by the physical regime: Strongly seasonal, high nutrient
regimes are dominated by fast-growing bloom specialists, while stable,
low-seasonality regimes are dominated by organisms that can grow at low
nutrient concentrations, and are suited to oligotrophic conditions. In the
latter regions, resource competition theory is capable of predicting not only
the competitive outcome amongst organisms, but also the ecosystems control on
the ambient nutrients. Sensitivity experiments clearly indicate the strong
coupling of ecology and biogeochemical cycles: Changes to the phytoplankton
physiology had a predictable effect on nutrient concentrations. We investigate
how inter-annual variability and potential future changes to the ocean impact
the biogeographical organization in our model. |
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