Dimethysulfide concentrations in the ocean close to the antarctic continent

Gibson, John A.E.; Garrick, Russell C.; Burton, Harry R.; McTaggart, Andrew R.

doi:10.1080/01490458809377837

Cited by 25 publications

(16 citation statements)

References 26 publications

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“…Very high dimethylsulfide (DMS), acrylate and dimethylsulfoniopropionate (DMSP) concentrations have been recorded in inshore waters close to Australia's Davis scientific base, East Antarctica (8,12,13,18,25), and on the opposite side of the continent in the Weddell Sea (11). Anecdotal evidence (4, P. Nichols and H. Marchant, personal communication) suggests that high concentrations of these compounds are widespread near the Antarctic continent.…”

Section: Biological and Environmental Chemistry Of Dmsp And Related Smentioning

confidence: 99%

Acrylate and Dimenthylsulfoniopropionate (DMSP) Concentrations during an Antarctic Phytoplankton Bloom

Gibson

Swadling

Burton

1996

Biological and Environmental Chemistry of DMSP and Related Sulfonium Compounds

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SUMMARYVery high concentrations of dimethyl sulfide (DMS) and dimethylsulfoniopropionate (DMSP) have been regularly reported from around the Antarctic coastline, and have been associated with blooms of the prymnesiophyte alga Phaeocystis sp. affin. antarctica. In this study, acrylate and DMSP concentrations were measured at an inshore marine site during the 1994-5 summer Antarctic phytoplankton bloom. The concentration of DMSP was determined by measuring the difference between the amount of acrylate before and after hydrolysis with NaOH. The concentration of acrylate rose from below the detection limit (ca. 10 nM) in early November to over 1.20 ~M by 7 December. Total DMSP also reached a maximum of 2.47 ~M on this date. Concentrations then dropped to below the detection limit by the end of January. Correlation matrix analysis of acrylate and DMSP concentrations and various parameters revealed significant positive correlations with cell counts of Cryptomonas sp., the dominant phytoplankton species during December, and dinoflagellates. Phaeocystis sp. affin. antarctica was present during the study in low numbers and probably contributed little to the DMSP pool. This is the first study which suggests that cryptomonads and dinoflagellates may be important producers of DMSP in the Antarctic environment.

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Section: Biological and Environmental Chemistry Of Dmsp And Related Smentioning

confidence: 99%

Acrylate and Dimenthylsulfoniopropionate (DMSP) Concentrations during an Antarctic Phytoplankton Bloom

Gibson

Swadling

Burton

1996

Biological and Environmental Chemistry of DMSP and Related Sulfonium Compounds

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“…Significantly elevated concentrations are reported in the waters around mainland Britain (143), in the vicinity of blooms of the prymnesiophyte Phaeocystis pouchetii (15,65,66), and in some upwelled waters (11). These studies straddle or fall into one of two broad categories:…”

Section: That Looks Out On Nothing Nothing But a Great Spacementioning

confidence: 99%

“…The early data of Lovelock et at. initiated a prodigious accumulation of seawater DMS measurements (7,9,11,16,19,24,38,65,75,108,142,143). The consensus of these investigations is that DMS ranges between 0.5 and 2 nM in the surface waters of the oligotrophic gyres,…”

Section: That Looks Out On Nothing Nothing But a Great Spacementioning

confidence: 99%

“…This has been attributed to, varously, the uneven relationship between algal production and chlorophyll, algal speciation, physiological state of the phytoplankton, and different rates of removal for chlorophyll and DMS. Effort to correlate DMS with specific phytoplanton taxa (15,29,65,66,75,95,96,143) DMS from its algal source. These include both consumption and production processes, as detailed below.…”

Section: Biological and Chemical Controls On Dms Concentrationsmentioning

confidence: 99%

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Marine microbial production of dimethylsulfide from dissolved dimethylsulfoniopropionate

Ledyard¹

1993

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“…is known to produce DMSP-lyase (Stefels & van Boekel 1993) and is an important player in the DMS cycle. Phaeocystis forms large blooms in the North Sea (Veldhuis & Adrniraal 1987, van Boekel et al 1992, Turner et al 1996, the Arctic (Wassmann et al 1990, Matrai & Vernet 1997) and the Antarctic (Gibson et al 1988, Crocker et al 1995, where it has been associated with the highest DMS concentrations ever measured in the oceans (Gibson et al 1988, Crocker et al 1995.…”

Section: Introductionmentioning

confidence: 99%

DMSP synthesis and exudation in phytoplankton:a modeling approach

Laroche¹,

Vézina²,

Levasseur³

et al. 1999

Mar. Ecol. Prog. Ser.

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DMSP synthesis and exudation in phytoplankton:a modeling approach ABSTRACT: In the marine environment, phytoplankton are the fundamental producers of dimethylsulfoniopropionate (DMSP), the precursor of the climatically active gas dimethylsulfide (DMS). DIMSP is released by exudation, cell autolysis, and zooplankton grazing during phytoplankton blooms. In this study, we developed a model of phytoplankton DMSP and DMS production allowing quantification of the exudation rates of these compounds during different growth phases. The model was tested on published data from axenic cultures of Prorocentrum minimum and Phaeocystis sp.; DMSP exudation rates vary considerably between the 2 species Model results show that P minimum exudes around 1 % d-l of its DMSP quota during the latent, exponential and senescent phases. This is comparable to the average exudation rate estimated from previous laboratory experiments. However, Phaeocystis sp. exudes from 3 to 11 % d-' of its DMSP quota. For this species. DMSP exudation rates apparently show an inverse relationship with the population growth rate. The maximum DMSP exudation rate in Phaeocystls sp. is 10 times higher than previously reported DMSP or DMS exudation rates. Our results suggest that exudation may be as important as cell autolysis in the release of DMSP during Phaeocystis sp.blooms. We conclude that exudation should be incorporated in models of DMS cycling in the marine environment. Moreover, our results for Phaeocystis sp. suggest that a low and constant exudation rate, as sometimes used in models, is not suitable for all conditions.

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Dimethysulfide concentrations in the ocean close to the antarctic continent

Cited by 25 publications

References 26 publications

Acrylate and Dimenthylsulfoniopropionate (DMSP) Concentrations during an Antarctic Phytoplankton Bloom

Acrylate and Dimenthylsulfoniopropionate (DMSP) Concentrations during an Antarctic Phytoplankton Bloom

Marine microbial production of dimethylsulfide from dissolved dimethylsulfoniopropionate

DMSP synthesis and exudation in phytoplankton:a modeling approach

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