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| Titel |
Phytoplankton lysis predicts dissolved organic carbon release in marine plankton communities |
| VerfasserIn |
S. Agustí  , C. M. Duarte |
| 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 ; 10, no. 3 ; Nr. 10, no. 3 (2013-03-01), S.1259-1264 |
| Datensatznummer |
250018121
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| Publikation (Nr.) |
 copernicus.org/bg-10-1259-2013.pdf |
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| Zusammenfassung |
| The relationship between the percent extracellular carbon release (PER) and
the specific lysis rates of phytoplankton was examined across a range of
communities spanning from highly oligotrophic ones in the subtropical
Atlantic Ocean to productive ones in the N. African upwelling and the
Southern Ocean. Communities in oligotrophic waters supported high
phytoplankton cell lysis rates and low particulate primary production rates
but high dissolved primary production and PER. The percent extracellular
carbon released increased with increasing lysis rates to reach an asymptote
at about 80% PER with specific lysis rates > 1.5 d−1,
observed in the most oligotrophic conditions tested. These results confirm
that high phytoplankton mortality in the oligotrophic ocean leads to high
PER, accounting for the large fraction of the photosynthetic carbon
channelled through bacteria characteristic of oligotrophic marine
communities. |
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