Ecology of aerobic anoxygenic phototrophic bacteria along an oligotrophic gradient in the Mediterranean Sea
| Type | Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Date | 2011 | ||||||||
| Language | English | ||||||||
| Author(s) | Lamy D.1, 2, 10, Jeanthon C.3, 4, Cottrell M. T.5, Kirchman D. L.5, Van Wambeke France6, Ras J.7, Dahan O.3, 4, Pujo-Pay M.1, 2, Oriol L.1, 2, Bariat L.2, 8, Catala P.1, 2, Cornet-Barthaux V.9, Lebaron P.1, 2 | ||||||||
| Affiliation(s) | 1 : Observatoire Oceanolog Banyuls, LOMIC, Lab Oceanog Microbienne, INSU CNRS UMR 7621, F-66651 Banyuls Sur Mer, France. 2 : Univ Paris 06, UPMC, Observatoire Oceanolog Banyuls, F-66651 Banyuls Sur Mer, France. 3 : Univ Paris 06, UPMC, UMR 7144, F-29680 Roscoff, France. 4 : CNRS, Biol Stn, Grp Plancton Ocean, INSU CNRS,Observatoire Oceanolog,UMR 7144, F-29680 Roscoff, France. 5 : Univ Delaware, Sch Marine Sci & Policy, Lewes, DE 19958 USA. 6 : Univ Aix Marseille 2, INSU CNRS, Lab Microbiol Geochim & Ecol Marines, Ctr Oceanol Marseille,UMR 6117, F-13288 Marseille 9, France. 7 : Univ Paris 06, CNRS, UMR 7093, Lab Oceanog, Villefranche Sur Mer, France. 8 : Observatoire Oceanolog Banyuls, CNRS, UMS 2348, F-66651 Banyuls Sur Mer, France. 9 : CNRS IRDUniv Mediterranee, UMR 6535, Ctr Oceanol Marseille, LOPB, F-13288 Marseille, France. 10 : Univ Vienna, Dept Marine Biol, A-1090 Vienna, Austria. |
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| Source | Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2011 , Vol. 8 , N. 4 , P. 973-985 | ||||||||
| DOI | 10.5194/bg-8-973-2011 | ||||||||
| WOS© Times Cited | 24 | ||||||||
| Abstract | Aerobic anoxygenic phototrophic (AAP) bacteria are photoheterotrophic prokaryotes able to use both light and organic substrates for energy production. They are widely distributed in coastal and oceanic environments and may contribute significantly to the carbon cycle in the upper ocean. To better understand questions regarding links between the ecology of these photoheterotrophic bacteria and the trophic status of water masses, we examined their horizontal and vertical distribution and the effects of nutrient additions on their growth along an oligotrophic gradient in the Mediterranean Sea. Concentrations of bacteriochlorophyll-a (BChl-a) and AAP bacterial abundance decreased from the western to the eastern basin of the Mediterranean Sea and were linked with concentrations of chlorophyll-a, nutrient and dissolved organic carbon. Inorganic nutrient and glucose additions to surface seawater samples along the oligotrophic gradient revealed that AAP bacteria were nitrogen-and carbon-limited in the ultraoligotrophic eastern basin. The intensity of the AAP bacterial growth response generally differed from that of the total bacterial growth response. BChl-a quota of AAP bacterial communities was significantly higher in the eastern basin than in the western basin, suggesting that reliance on phototrophy varied along the oligotrophic gradient and that nutrient and/or carbon limitation favors BChl-a synthesis. | ||||||||
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