Seasonal dimethylsulfoniopropionate (DMSP) variability in Dona Paula bay
Data on temporal variations of total dimethylsulfoniopropionate (DMSP t) and the environmental factors that influence DMSP t concentrations are important in understanding the biogeochemical cycling of organic sulfur compounds. Annual and diurnal variations of DMSP t were investigated in relation to...
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Published in | Estuarine, coastal and shelf science Vol. 81; no. 3; pp. 301 - 310 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
10.02.2009
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Data on temporal variations of total dimethylsulfoniopropionate (DMSP
t) and the environmental factors that influence DMSP
t concentrations are important in understanding the biogeochemical cycling of organic sulfur compounds. Annual and diurnal variations of DMSP
t were investigated in relation to environmental variables at a fixed station in Dona Paula bay (west coast of India). DMSP concentrations were high in the day and low at night and ranged from 3.69 to 84
nM with a maximum at 17.00
h. The high concentrations of DMSP
t during daytime closely followed that of Chl
a concentrations. The DMSP utilizers averaged 0.8
±
0.3
×
10
3
cells
l
−1 during night and 0.4
±
0.1
×
10
3
cells
l
−1 during the day. The diel variation of DMSP
t was influenced more by biological variables than hydrographic parameters. In the year-round study, the concentrations ranged from 0.69 to 15.8
nM. It was fourfold higher during the southwest monsoon season (13.4
±
2
nM) and threefold higher during the post-monsoon season (9.96
±
5
nM) compared to the pre-monsoon season (3.1
±
1
nM). DMSP
t concentrations showed temporal variability, both during diurnal and annual studies. Diatoms were identified as producers of DMSP in Dona Paula bay. Dinoflagellates also contributed during the non-monsoon seasons. Another factor involved in the variability of DMSP
t was DMSP utilizing bacteria, which ranged from 1 to 10% of the total heterotrophic count. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0272-7714 1096-0015 |
DOI: | 10.1016/j.ecss.2008.11.004 |