Cited by 43Marine and coastal ecosystemsAquatic Ecosystems and Phytoplankton DynamicsAtmospheric chemistry and aerosols

Processes driving seasonal variability in DMS, DMSP, and DMSO concentrations and turnover in coastal Antarctic waters

Asher, E. C., Dacey, J. W. H., Stukel, M., Long, M. C., Tortell, P. D.·2017·Limnology and Oceanography

Abstract

Abstract This study presents new measurements of the concentrations and turnover rates of dimethyl sulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethyl sulfoxide (DMSO) in coastal waters near Palmer Station, Antarctica, during the spring and summer of 2012–2013. Using several novel analytical and experimental techniques, we document variability in DMS, DMSP, and DMSO (DMS/P/O) concentrations and quantify dominant production and removal terms in the mixed layer DMS budget. Our results demonstrate considerable seasonal variability in the concentration of DMS (range 0–20 nM), total DMSP (8–160 nM), and total DMSO (4–160 nM). Over the seasonal cycle, dissolved DMSP concentrations were well correlated with total DMSP concentrations and the abundance of Phaeocystis antarctica , while DMSO concentrations (total and dissolved) were well correlated with DMS concentrations. DMSP cleavage from the dissolved pool (mean rate = 5.5 nM d −1 ) and release from microzooplankton grazing (mean 5.6 nM d −1 ) were the dominant sources of DMS, with smaller DMS production rates associated with DMSO reduction from the dissolved pool (mean 2.6 nM d −1 ) and krill grazing (mean 0.82 nM d −1 ). Specific rate constants for DMSP cleavage were inversely related to net primary production. Bacterial uptake was a primary contributor to DMS removal (mean −12 nM d −1 ), and we observed a significant correlation between bacterial production and gross DMS loss rate constants. Estimated sea‐air flux and photo‐oxidation constituted secondary DMS sinks. Our experimental and analytical methods provide insight into the DMS/P/O cycle at Palmer Station, and a starting point for future studies examining inter‐annual DMS/P/O variability in coastal Antarctic waters.

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Crossref · 10.1002/lno.10379

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  • Copepods use chemosensory mechanisms to identify algal prey; for example, the presence of the algal gaseous metabolite dimethyl sulphide (DMS) results in increased MP ingestion.

    “Copepods use chemosensory mechanisms to identify algal prey; for example, the presence of the algal gaseous metabolite dimethyl sulphide (DMS; the reduced form of DMSO and a known foraging attractant (Asher et al., 2017)) results in increased MP ingestion (Procter et al., 2019).”

    From Trophic transfer of polyester microfibres across a multi-level marine food web. (2025) · cites this paper as Asher et al., 2017

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Authors
Asher, E. C., Dacey, J. W. H., Stukel, M., Long, M. C., & Tortell, P. D.
Affiliations
  • University of British Columbia (CA)
  • Woods Hole Oceanographic Institution (US)
  • Florida State University (US)
  • NSF National Center for Atmospheric Research (US)
Corresponding author
Asher, E. C.
Venue
Limnology and Oceanography
Publisher
Wiley
Published
2016-10-10
Volume
62
Issue
1
Pages
104-124
ISSN
  • 0024-3590 (ISSN-L)
  • 1939-5590
OpenAlex
W2531118349
Cited by
43
References
77
Citations by year
2026: 3 · 2025: 6 · 2024: 3 · 2023: 6 · 2022: 2 · 2021: 7 · 2020: 7 · 2019: 5 · 2018: 3 · 2017: 1
FWCI
2.43
Type
journal article
Language
en
Open access
closed
Locations
Limnology and Oceanography (publishedVersion)
Funders
  • US National Science Foundation (ANT-0823101, ANT-1043532)
  • National Science and Engineering Research Council of Canada
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
Keywords
dimethyl sulfide, dimethylsulfoniopropionate, dimethyl sulfoxide, seasonal variation, Palmer Station, Phaeocystis antarctica, microzooplankton grazing, bacterial internalization, air-sea fluxes, photooxidation, net primary productivity, bacterial production

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