Environmental control on the variability of DMS and DMSP in the Mauritanian upwelling region.

Zindler, Cathleen , Peeken, Ilka, Marandino, Christa and Bange, Hermann W. (2012) Environmental control on the variability of DMS and DMSP in the Mauritanian upwelling region. Open Access Biogeosciences (BG), 9 . pp. 1041-1051. DOI 10.5194/bg-9-1041-2012.

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Abstract

Dimethylsulphide (DMS) and dissolved and particulate dimethylsulfoniopropionate (DMSPd, DMSPp) were measured in near-surface waters along theMauritanian 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.

Document Type: Article
Additional Information: WOS:000302179500013
Keywords: Biological Oceanography; Marine chemistry; Biogeochemistry; DMS, upwelling, Mauritania; DIMETHYL SULFIDE PRODUCTION; BIOGENIC SULFUR-COMPOUNDS; MARINE-PHYTOPLANKTON; COMMUNITY STRUCTURE; EMILIANIA-HUXLEYI; ATLANTIC-OCEAN; NATURAL-WATERS; SEA; NITRATE; SURFACE
Research affiliation: MARUM
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
AWI
Refereed: Yes
Open Access Journal?: Yes
DOI etc.: 10.5194/bg-9-1041-2012
ISSN: 1726-4170
Projects: SOPRAN, Future Ocean
Expeditions/Models/Experiments:
Date Deposited: 19 Mar 2012 14:23
Last Modified: 23 Sep 2019 23:51
URI: http://oceanrep.geomar.de/id/eprint/14051

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