Biological production of methyl bromide in the coastal waters of the North Sea and open ocean of the northeast Atlantic |
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| Authors: | J M Baker C E Reeves P D Nightingale S A Penkett S W Gibb A D Hatton |
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| Institution: | a School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK;b CCMS-Plymouth Marine Lab, Prospect Place, West Hoe, Plymouth, PL1 3DH, UK;c CCMS-Dunstaffnage Marine Laboratory, PO Box 3, Oban, Argyll, PA34 4AD, Scotland, UK |
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| Abstract: | Two separate studies in different oceanic regions provide evidence for the production of methyl bromide (CH3Br) by the prymnesiophyte Phaeocystis. A sampling program to study the seasonal cycle of CH3Br in a coastal area demonstrated that the seawater was supersaturated with respect to CH3Br for over 3 months of the year. The greatest saturation was observed during a bloom of Phaeocystis. Also, in situ field measurements demonstrated that CH3Br was supersaturated over a large region of the northeast Atlantic. A positive correlation was observed between CH3Br and dimethylsulphoniopropionate (DMSP), indicating that there was a source common to both compounds. An accessory pigment, hexanoyloxyfucoxanthin, which indicates the presence of prymnesiophytes, also correlated positively with CH3Br. |
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| Keywords: | brain cortex lysophospholipase |
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