Dimethyl sulfoxide (DMSO) reduction potential in Mediterranean seagrass (Posidonia oceanica) sediments
In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, more
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| Keywords |
Chemical compounds > Sulphur compounds > Oxides > Sulphur oxides
Chemical reactions > Reduction
Flora > Weeds > Marine organisms > Seaweeds > Sea grass
Sediments
Posidonia oceanica (Linnaeus) Delile, 1813 [WoRMS]
MED, Spain [Marine Regions]
Marine/Coastal |
| Author keywords |
dimethyl sulfoxide reduction; dimethylsulfide; microbial activity;sediments; seagrass meadows |
| Authors | | Top |
- López, N.I.
- Duarte, C.M., more
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| Abstract |
Microbial activity was assayed in sediments under five nutrient-limited Posidonia oceanica meadows on the north-east coast of Spain by measuring potential DMSO reduction to dimethylsulfide (DMS) throughout an annual cycle. Nutrient enrichment of the sediments was used to examine the importance of nutrient availability for potential DMSO reduction. DMSO reduction was observed in all the sediments analysed. Values were higher under anaerobic conditions, and low in spring when seagrass uptake removed most of the interstitial sediment phosphorus. DMSO reduction was correlated with a-glucosidase activity suggesting a link with other microbial activities. Nutrient additions significantly increased DMSO reduction in the meadows studied. The extent of the response varied substantially over the year and was highest during November-December. Microbial DMSO reduction was coupled with nutrient cycles like other bacterial activities. This suggests a possibly important role of nutrient additions in bacterial activity in Mediterranean seagrass sediments. |
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