dc.contributor |
Universitat de Barcelona |
dc.contributor.author |
Vila-Reixach, G. |
dc.contributor.author |
Gasol, J.M. |
dc.contributor.author |
Cardelús, Clara |
dc.contributor.author |
Vidal Barcelona, Montserrat |
dc.date |
2014-04-09T09:04:38Z |
dc.date |
2012-06-07 |
dc.date |
2014-04-03T12:01:43Z |
dc.date |
info:eu-repo/date/embargoEnd/2017-10-01 |
dc.identifier.citation |
0171-8630 |
dc.identifier.citation |
607585 |
dc.identifier.uri |
http://hdl.handle.net/2445/53391 |
dc.format |
13 p. |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
Inter-Research |
dc.relation |
Reproducció del document publicat a: http://dx.doi.org/10.3354/meps09677 |
dc.relation |
Marine Ecology Progress Series, 2012, vol. 456, p. 7-19 |
dc.relation |
http://dx.doi.org/10.3354/meps09677 |
dc.rights |
(c) Inter-Research, 2012 |
dc.rights |
info:eu-repo/semantics/embargoedAccess |
dc.subject |
Compostos orgànics |
dc.subject |
Costes |
dc.subject |
Ecologia de les costes |
dc.subject |
Metabolisme microbià |
dc.subject |
Organic compounds |
dc.subject |
Coasts |
dc.subject |
Coastal ecology |
dc.subject |
Microbial metabolism |
dc.title |
Seasonal dynamics and net production of disolved organic carbon in an oligotrophic coastal environment |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/publishedVersion |
dc.description.abstract |
To understand dissolved organic carbon (DOC) seasonal dynamics in a coastal oligotrophic site in the north-western Mediterranean Sea, we monitored DOC concentrations monthly over 3 yr, together with the meteorological data and the food-web-related biological processes involved in DOC dynamics. Additional DOC samples were taken in several inshore−offshore transects along the Catalan coast. We found DOC concentrations of ~60 µmol C l−1 in winter, with increasing values through the summer and autumn and reaching 100 to 120 µmol C l−1 in November. There was high inter-annual variability in this summer DOC accumulation, with values of 36, 69 and 13 µmol C l−1 for 2006, 2007 and 2008, respectively. The analysis of the microbial food-web processes involved in the DOC balance did not reveal the causes of this accumulation, since the only occasion on which we observed net DOC production (0.3 ± 1 µmol C l−1 d−1 on average) was in 2007, and the negative DOC balance of 2006 and 2008 did not prevent DOC accumulating. The DOC accumulation episodes coincided with low rates of water renewal (average 0.037 ± 0.021 d−1 from May to October) compared with those of winter to early spring (average 0.11 ± 0.048 d−1 from November to April). Indeed, the amount of DOC accumulated each year was inversely correlated with the average summer rainfall. We hypothesize that decreased DOC turn-over due to photochemical or biological processes mostly active during the summer and low water renewal rate combine to determine seasonal DOC accumulation and influence its inter-annual variability. |