Biogeochemistry of Dimethylsulfide, Dimethylsulfoniopropionate, and Acrylic Acid in the Changjiang Estuary and the East China Sea

Wu, Xi; Li, Peifeng; Liu, Chunying; Zhang, Honghai; Yang, Gui‐Peng; Zhang, Shenghui; Zhu, Mao‐Xu

doi:10.1002/2017jc013265

Cited by 15 publications

(8 citation statements)

References 93 publications

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“…DMSPt had a positive correlation with temperature and a negative correlation with salinity (Table 2). Many other investigations also reported analogous correlations (Shenoy and Patil, 2003;Deschaseaux et al, 2014;Wu et al, 2017). In winter, transect B57-63 was inaccessible to sampling due to frozen conditions; thus, we only report the results of transect B12-16 in the NYS and transect H19-26 in the SYS.…”

Section: Vertical Distributions Of Aad Dms and Dmsp In The Bs And Yssupporting

confidence: 52%

“…The incubation experiments for DMSPd and AAd degradation were conducted on deck using seawater collected at stations H19, H26, B12, B17, B53, and B63 in summer and at H19, H26, B12, and B16 in winter, following the method of Wu et al (2017). We determined the degradation rates of DMSPd and the production rates of DMS and AAd by incubating unfiltered seawater samples in two 250 mL gastight glass syringes (wrapped in aluminum foil) in the dark at in situ temperatures.…”

Section: Incubation Experimentsmentioning

confidence: 99%

“…The concentrations, biological uptake, and respiration of dissolved AA (AAd) were investigated in the northern Gulf of Mexico (Tyssebotn et al, 2017). Tan et al (2017) and Wu et al (2017) reported the spatial distributions of AA in the Changjiang Estuary and the East China Sea. Liu et al (2016) investigated the spatial and diurnal variations in AA in the Bohai Sea (BS) and Yellow Sea (YS) during autumn and measured the apparent production rates of AA through DMSP degradation by incubations.…”

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confidence: 99%

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Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter

Zhang

et al. 2020

Biogeosciences

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Spatiotemporal distributions of dissolved acrylic acid (AAd) and related biogenic sulfur compounds including dimethylsulfide (DMS) and dissolved and total dimethylsulfoniopropionate (DMSPd and DMSPt) were investigated in the Bohai Sea (BS) and Yellow Sea (YS) during summer and winter. AAd and DMS production from DMSPd degradation and AAd degradation were analyzed. Significant seasonal variations in AAd and DMS(P) were observed. AAd exhibited similar distributions during summer and winter; i.e., relatively high values of AAd occurred in the BS and the northern YS, and the concentrations decreased from inshore to offshore areas in the southern YS. Due to strong biological production from DMSP and abundant terrestrial inputs from rivers in summer, the AAd concentrations in the surface seawater during summer (30.01 nmol L −1 ) were significantly higher than those during winter (14.98 nmol L −1 ). The average concentration sequence along the transects during summer (AAd > DMSPt > DMS > DMSPd) showed that particulate DMSP (DMSPp) acted as a DMS producer and that terrestrial sources of AAd were present; in contrast, the sequence in winter was AAd > DMSPt > DMSPd > DMS. High values of AAd and DMS(P) were mostly observed in the upper layers, with occasional high values at the bottom. High AAd concentrations in the porewater, which could be transported to the bottom water, might result from the cleavage of intracellular DMSP and reduce bacterial metabolism in sediments. In addition, the production and degradation rates of biogenic sulfur compounds were significantly higher in summer than in winter, and the removal of AAd was pri-marily attributed to microbial consumption. Other sources of AAd existed aside from the production from DMSPd.

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Section: Vertical Distributions Of Aad Dms and Dmsp In The Bs And Yssupporting

confidence: 52%

Section: Incubation Experimentsmentioning

confidence: 99%

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confidence: 99%

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Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter

Zhang

et al. 2020

Biogeosciences

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“…This lack of correlation may be due, in part, to variation in DMSPd loss pathways. The DMS yield of DMSP metabolism can vary significantly depending on metabolic needs of bacteria present and the relative abundance of phytoplankton with DMSP lyase activity (Yoch, 2002). Although DMS yield was not measured in this study, previous reports have shown that in the NESAP a low carbon to organic sulfur ratio in the HNLC regime results in increased DMS yield from DMSP metabolism, whereas onshore DMS yield is relatively lower (Merzouk et al, 2006;Royer et al, 2010).…”

Section: The Effect Of Dms and Dmsp Consumption Rate On Dms Distributionmentioning

confidence: 72%

Patterns and drivers of dimethylsulfide concentration in the northeast subarctic Pacific across multiple spatial and temporal scales

et al. 2019

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Abstract. The northeast subarctic Pacific (NESAP) is a globally important source of the climate-active gas dimethylsulfide (DMS), yet the processes driving DMS variability across this region are poorly understood. Here we examine the spatial distribution of DMS at various spatial scales in contrasting oceanographic regimes of the NESAP. We present new high-spatial-resolution measurements of DMS across hydrographic frontal zones along the British Columbia continental shelf, together with key environmental variables and biological rate measurements. We combine these new data with existing observations to produce a revised summertime DMS climatology for the NESAP, yielding a broader context for our sub-mesoscale process studies. Our results demonstrate sharp DMS concentration gradients across hydrographic frontal zones and suggest the presence of two distinct DMS cycling regimes in the NESAP, corresponding to microphytoplankton-dominated waters along the continental shelf and nanoplankton-dominated waters in the cross-shelf transitional zone. DMS concentrations across the continental shelf transition (range < 1–10 nM, mean 3.9 nM) exhibited positive correlations to salinity (r=0.80), sea surface height anomaly (SSHA; r=0.51), and the relative abundance of prymnesiophyte and dinoflagellates (r=0.89). In contrast, DMS concentrations in nearshore coastal transects (range < 1–24 nM, mean 6.1 nM) showed a negative correlation with salinity (r=-0.69; r=-0.78) and SSHA (r=-0.81; r=-0.75) and a positive correlation to relative diatom abundance (r=0.88; r=0.86). These results highlight the importance of bloom-driven DMS production in continental shelf waters of this region and the role of prymnesiophytes and dinoflagellates in DMS cycling further offshore. In all areas, the rate of DMS consumption appeared to be an important control on observed concentration gradients, with higher DMS consumption rate constants associated with lower DMS concentrations. We compiled a data set of all available summertime DMS observations for the NESAP (including previously unpublished results) to examine the performance of several existing algorithms for predicting regional DMS concentrations. None of these existing algorithms was able to accurately reproduce observed DMS distributions across the NESAP, although performance was improved by the use of regionally tuned coefficients. Based on our compiled observations, we derived an average summertime distribution map for DMS concentrations and sea–air fluxes across the NESAP, estimating a mean regional flux of 0.30 Tg of DMS-derived sulfur to the atmosphere during the summer season.

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“…DMSPt showed a positive correlation with temperature and a negative correlation with salinity (Table 2). Many other investigations also reported the analogous correlations (Deschaseaux et al, 2014;Shenoy and Patil, 2003;Wu et al, 2017). It has been reported that 225 lower salinity could enhance algal DMSP lyase activity (Stefels, 2000), which might have led to the negative correlation between DMSP and salinity.…”

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confidence: 58%

Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow Seas during summer and winter

Wu¹,

Li²,

Zhang³

et al. 2019

Preprint

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Spatio-temporal distributions of acrylic acid (AA) and related biogenic sulfur compounds including 10 dimethylsulfide (DMS) and dissolved and total dimethylsulfoniopropionate (DMSPd and DMSPt) were investigated in the Bohai Sea (BS) and the Yellow Sea (YS) during summer and winter. AA and DMS production from DMSPd degradation and AA degradation were studied. Significant seasonal variations of AA and DMS(P) were observed. AA presented similar distributions during summer and winter, that is, relatively high values of AA emerged in the BS and the north YS and concentrations decreased from inshore to offshore areas in the south YS. Due to strong biological production 15 from DMSP and abundant terrestrial inputs from rivers in summer, AA concentrations at surface were higher during summer (30.01 nmol L -1 ) than during winter (14.98 nmol L -1 ). The average concentration sequence AA>DMSPt>DMS>DMSPd at transects during summer illustrated particulate DMSP (DMSPp) as a DMS producer and terrestrial sources of AA, whereas the sequence in winter was AA>DMSPt>DMSPd>DMS. High values of AA and DMS(P) were mostly observed in the upper layers with occasional high values at bottom. High AA concentrations in 20 porewater which could be transported into the bottom water might result from the cleavage of intracellular DMSP andreduce bacterial metabolism in sediments. In addition, the degradation/production rates of biogenic sulfur compounds were obviously higher in summer than in winter and the removal of AA was mainly attributed to the microbial consumption. Other sources of AA besides the production from DMSPd was also proved.

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Biogeochemistry of Dimethylsulfide, Dimethylsulfoniopropionate, and Acrylic Acid in the Changjiang Estuary and the East China Sea

Cited by 15 publications

References 93 publications

Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter

Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow seas during summer and winter

Patterns and drivers of dimethylsulfide concentration in the northeast subarctic Pacific across multiple spatial and temporal scales

Acrylic acid and related dimethylated sulfur compounds in the Bohai and Yellow Seas during summer and winter

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