 |
| Titel |
Environmental control on the variability of DMS and DMSP in the Mauritanian upwelling region |
| VerfasserIn |
C. Zindler, I. Peeken, C. A. Marandino, H. W. Bange |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 3 ; Nr. 9, no. 3 (2012-03-16), S.1041-1051 |
| Datensatznummer |
250006843
|
| Publikation (Nr.) |
 copernicus.org/bg-9-1041-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Dimethylsulphide (DMS) and dissolved and particulate
dimethylsulfoniopropionate (DMSPd, DMSPp) were measured in
near-surface waters along the Mauritanian coast, Northwest Africa, during
the upwelling season in February 2008. DMS, DMSPd and DMSPp
surface concentrations of up to 10 nmol L−1, 15 nmol L−1 and
990 nmol L−1, respectively, were measured. However, the DMS concentrations
measured are in the low range compared to other upwelling regions. The
maximum DMSPp concentration is the highest reported from upwelling
regions so far, which might indicate that the Mauritanian upwelling is a hot
spot for DMSP. Within the phytoplankton groups, dinoflagellates were
identified as important contributors to DMS concentrations, while other
algae seemed to have only a minor or no influence on DMS and DMSP
concentrations. A pronounced switch from high DMSP to high DMS
concentrations was observed when the nitrogen to phosphorus ratio (N:P) was
below 7. The high DMS/DMSP ratios at N:P ratios <7 indicate that nitrogen
limitation presumably triggered a switch from DMSP to DMS independent of the
species composition. Our results underline the importance of coastal
upwelling regions as a local source for surface seawater sulphur. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|