Annual cycle of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) related to phytoplankton succession in the Southern North Sea

Speeckaert, Gaëlle; Borges, Alberto; Champenois, Willy; Royer, Colin; Gypens, Nathalie

doi:10.1016/j.scitotenv.2017.11.359

Cited by 40 publications

(43 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…blooms (>200 nM) [30,61,62]. The majority of the DMSP was in the particulate phase, as usually reported [24,30,56,62]. The average DMSP p /DMSO p for our study was 5.4 ± 4.8, in agreement with the average reported in Simó & Vila-Costa [47].…”

Section: Discussionsupporting

confidence: 92%

“…The range in DMSP t concentrations found at the coastal L4 station is within the range often reported for a variety of other marine environments, including the North Sea, North Atlantic, Mediterranean, and subarctic Pacific [20,30], but did not reach the elevated concentrations associated with intense dinoflagellate or Phaeocystis sp. blooms (>200 nM) [30,61,62]. The majority of the DMSP was in the particulate phase, as usually reported [24,30,56,62].…”

Section: Discussionmentioning

confidence: 53%

See 1 more Smart Citation

Seasonal Changes in Microbial Dissolved Organic Sulfur Transformations in Coastal Waters

et al. 2020

View full text Add to dashboard Cite

The marine trace gas dimethylsulfide (DMS) is the single most important biogenic source of atmospheric sulfur, accounting for up to 80% of global biogenic sulfur emissions. Approximately 300 million tons of DMS are produced annually, but the majority is degraded by microbes in seawater. The DMS precursor dimethylsulfoniopropionate (DMSP) and oxidation product dimethylsulphoxide (DMSO) are also important organic sulfur reservoirs. However, the marine sinks of dissolved DMSO remain unknown. We used a novel combination of stable and radiotracers to determine seasonal changes in multiple dissolved organic sulfur transformation rates to ascertain whether microbial uptake of dissolved DMSO was a significant loss pathway. Surface concentrations of DMS ranged from 0.5 to 17.0 nM with biological consumption rates between 2.4 and 40.8 nM·d−1. DMS produced from the reduction of DMSO was not a significant process. Surface concentrations of total DMSO ranged from 2.3 to 102 nM with biological consumption of dissolved DMSO between 2.9 and 111 nM·d−1. Comparisons between 14C2-DMSO assimilation and dissimilation rates suggest that the majority of dissolved DMSO was respired (>94%). Radiotracer microbial consumption rates suggest that dissimilation of dissolved DMSO to CO2 can be a significant loss pathway in coastal waters, illustrating the significance of bacteria in controlling organic sulfur seawater concentrations.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 53%

Seasonal Changes in Microbial Dissolved Organic Sulfur Transformations in Coastal Waters

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, in August, patches of elevated Fe(II) concentrations were found between high water line and runnel, while Fe(II) concentrations close to the low water line were overall lower compared to the other sampling campaigns. Phytoplankton blooms in the southern North Sea commonly start in March-April and undergo several successions throughout the summer and fall (June-October, Speeckaert et al, 2018). The combination of marinederived electron donor surplus and overall high temperatures during the summer months probably accelerated microbial respiration rates.…”

Section: Biogeochemical Patternsmentioning

confidence: 99%

Spatial and Temporal Patterns of Pore Water Chemistry in the Inter-Tidal Zone of a High Energy Beach

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Seawater DMSP levels in the photic zone (above 200 m) vary from 1 to 100 nM in the oligotrophic ocean [19][20][21][22][23] to micromolar levels in phytoplankton blooms 24,25 , and are generally highest in chlorophyll a (Chl-a) maximum layers 21 . Marine aphotic seawaters (below 200 m) have lower DMSP levels (~1.0-3.3 nM) in comparison 26,27 , but represent a much larger global volume.…”

mentioning

confidence: 99%

Bacteria are important dimethylsulfoniopropionate producers in marine aphotic and high-pressure environments

et al. 2020

View full text Add to dashboard Cite

Dimethylsulfoniopropionate (DMSP) is an important marine osmolyte. Aphotic environments are only recently being considered as potential contributors to global DMSP production. Here, our Mariana Trench study reveals a typical seawater DMSP/dimethylsulfide (DMS) profile, with highest concentrations in the euphotic zone and decreased but consistent levels below. The genetic potential for bacterial DMSP synthesis via the dsyB gene and its transcription is greater in the deep ocean, and is highest in the sediment.s DMSP catabolic potential is present throughout the trench waters, but is less prominent below 8000 m, perhaps indicating a preference to store DMSP in the deep for stress protection. Deep ocean bacterial isolates show enhanced DMSP production under increased hydrostatic pressure. Furthermore, bacterial dsyB mutants are less tolerant of deep ocean pressures than wild-type strains. Thus, we propose a physiological function for DMSP in hydrostatic pressure protection, and that bacteria are key DMSP producers in deep seawater and sediment.

show abstract

Annual cycle of dimethylsulfoniopropionate (DMSP) and dimethylsulfoxide (DMSO) related to phytoplankton succession in the Southern North Sea

Cited by 40 publications

References 56 publications

Seasonal Changes in Microbial Dissolved Organic Sulfur Transformations in Coastal Waters

Seasonal Changes in Microbial Dissolved Organic Sulfur Transformations in Coastal Waters

Spatial and Temporal Patterns of Pore Water Chemistry in the Inter-Tidal Zone of a High Energy Beach

Bacteria are important dimethylsulfoniopropionate producers in marine aphotic and high-pressure environments

Contact Info

Product

Resources

About