Effects of salinity downshock on dimethylsulfide production |
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| Authors: | Takushi Niki Miwa Shimizu Ayako Fujishiro Junji Kinoshita |
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| Institution: | (1) Faculty of Geo-environmental Science, Rissho University, Magechi, Kumagaya, Saitama 360-0194, Japan;(2) Kanagawa Prefectural Fisheries Technology Center, Sagami Bay Experiment Station, Hayakawa, Odawara, Kanagawa 250-0021, Japan |
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| Abstract: | During time-series observations in Sagami Bay, Japan, the concentration of dissolved dimethylsulfoniopropionate (DMSPd), a precursor of dimethylsulfide (DMS), was negatively correlated with salinity. In the laboratory, low-salinity shock reduced
DMS production rates of the natural bacterial community and induced rapid DMSP release from a dinophyte, Heterocapsa triquetra, suggesting that low-salinity shock reduced DMSPd consumption but enhanced DMSPd production, which agrees with the negative correlation between DMSPd and salinity observed in Sagami bay. In addition, low-salinity shock did not affect DMSP lyase activity of H. triquetra. Low-salinity shock would increase the contribution from algae in DMS production, leading to an increase in potential DMS
productivity in the environment. |
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| Keywords: | DMS DMSP DMSP lyase activity Salinity |
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