Microbial food webs and metabolic state across oligotrophic waters of the Mediterranean Sea during summer
| Type | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | 2011 | ||||||||
| Language | English | ||||||||
| Author(s) | Christaki U.1, Van Wambeke France2, Lefevre D.2, Lagaria A.1, 3, Prieur L.4, 8, Pujo-Pay M.5, 6, Grattepanche J. -D.1, Colombet J.7, Psarra S.3, Dolan J. R.4, 8, Sime-Ngando T.7, Conan Pascal5, 6, Weinbauer M. G.4, 8, Moutin T.9 | ||||||||
| Affiliation(s) | 1 : Univ Lille Nord France, ULCO, LOG, INSU CNRS,UMR8187, F-62930 Wimereux, France. 2 : Univ Aix Marseille 2, Ctr Oceanol Marseille, LMGEM, INSU CNRS,UMR6117, F-13288 Marseille 9, France. 3 : Hellen Ctr Marine Res, Inst Oceanog, Iraklion 71003, Crete, Greece. 4 : Observ Oceanol Villefranche Sur Mer, LOV, INSU CNRS, UMR7093, F-06238 Villefranche Sur Mer, France. 5 : Observ Oceanol, Lab Oceanog Microbienne, INSU CNRS, UMR7621, F-66651 Banyuls Sur Mer, France. 6 : Univ Paris 06, Lab Oceanog Microbienne, Observ Oceanol, UMR7621, F-66651 Banyuls Sur Mer, France. 7 : INSU CNRS, LMGE, UMR6023, F-63177 Aubiere, France. 8 : Univ Paris 06, Lab Oceanog Villefranche, Observ Oceanol Villefranche Sur Mer, UMR7093, F-06230 Villefranche Sur Mer, France. 9 : Univ Aix Marseille 2, LOPB, Ctr Oceanol Marseille, INSU CNRS,UMR6535, F-13288 Marseille 9, France. |
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| Source | Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2011 , Vol. 8 , N. 7 , P. 1839-1852 | ||||||||
| DOI | 10.5194/bg-8-1839-2011 | ||||||||
| WOS© Times Cited | 42 | ||||||||
| Abstract | The abundance and activity of the major members of the heterotrophic microbial community - from viruses to ciliates - were studied along a longitudinal transect across the Mediterranean Sea in the summer of 2008. The Mediterranean Sea is characterized by a west to east gradient of deepening of DCM (deep chlorophyll maximum) and increasing oligotrophy reflected in gradients of biomass and production. However, within this well documented longitudinal trend, hydrological mesoscale features exist and likely influence microbial dynamics. Here we present data from a W-E transect of 17 stations during the period of summer stratification. Along the transect the production and fate of organic matter was investigated at three selected sites each one located in the centre of an anticyclonic eddy: in the Algero-Provencal Basin (St. A), the Ionian Basin (St. B), and the Levantine Basin (St. C). The 3 geographically distant eddies showed low values of the different heterotrophic compartments of the microbial food web, and except for viruses in site C, all integrated (0-150 m) stocks were higher in reference stations located in the same basin outside the eddies. During our study the 3 eddies showed equilibrium between GPP (Gross Primary Production) and DCR (Dark Community Respiration). Integrated PPp (Particulate Primary Production) values at A, B and C varied from similar to 140 to similar to 190 mgCm(-2). | ||||||||
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