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| Titel |
Springtime contribution of dinitrogen fixation to primary production across the Mediterranean Sea |
| VerfasserIn |
E. Rahav, B. Herut, A. Levi, M. R. Mulholland, I. Berman-Frank |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 3 ; Nr. 9, no. 3 (2013-05-14), S.489-498 |
| Datensatznummer |
250018074
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| Publikation (Nr.) |
 copernicus.org/os-9-489-2013.pdf |
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| Zusammenfassung |
| Dinitrogen (N2) fixation rates were measured during early spring across
the different provinces of Mediterranean Sea surface waters. N2 fixation
rates, measured using 15N2 enriched seawater, were lowest in the
eastern basin and increased westward with a maximum at the Strait of
Gibraltar (0.10 to 2.35 nmol N L−1 d−1, respectively). These
rates were 3–7 fold higher than N2 fixation rates measured previously
in the Mediterranean Sea during summertime and we estimated that
methodological differences alone did not account for the seasonal changes we
observed. Higher contribution of N2 fixation to primary production
(4–8%) was measured in the western basin compared to the eastern basin
(∼2%). Our data indicates that these differences between basins
may be attributed to changes in N2-fixing planktonic communities and
that heterotrophic diazotrophy may play a significant role in the eastern
Mediterranean while autotrophic diazotrophy has a more dominant role in the
western basin. |
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