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Biogeosciences, 6, 1229–1246, 2009 www.biogeosciences.net/6/1229/2009/ © Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License.
Biogeosciences
Short term summer to autumn variability of dissolved lipid classes in the Ligurian sea (NW Mediterranean) M. Goutx1 , C. Guigue1 , D. Aritio D.1 , J. F. Ghiglione2,3 , M. Pujo-Pay2,3 , V. Raybaud4,5 , M. Duflos1 , and L. Prieur4,5 1 CNRS-INSU
UMR 6117, Laboratoire de Microbiologie, G´eochimie et Ecologie Marines, Observatoire du Centre d’Oc´eanologie de Marseille, Campus de Luminy, 13288 Marseille Cedex 09, France 2 CNRS, UMR 7621, Laboratoire d’Oc´ eanographie Biologique de Banyuls, Avenue Fontaul´e, BP44, 66650 Banyuls sur mer, France 3 UPMC, Universit´ e Paris 06, UMR 7621, Laboratoire ARAGO, Avenue Fontaul´e, BP 44, 66650 Banyuls sur mer, France 4 UPMC Universit´ e Paris 06, UMR 7093, Laboratoire d’Oc´eanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France 5 CNRS, UMR 7093, Laboratoire d’Oc´ eanographie de Villefranche, BP 28, 06234 Villefranche-sur-Mer cedex, France Received: 7 October 2008 – Published in Biogeosciences Discuss.: 6 January 2009 Revised: 19 May 2009 – Accepted: 2 July 2009 – Published: 21 July 2009
Abstract. Changes in concentration and composition of Iatroscan-measured dissolved lipids were examined at a daily to month scale, in relation to the hydrological and biological context at a central site of the Ligurian sea, NW Mediterranean during the PECHE-DYNAPROC 2 experiment (14 September to 17 October 2004). Lipid concentrations (excluding hydrocarbons) (TLd-HC) and TLd-HC to DOC ratios in the 0–1000 m water column, varied from 5.3 to 48.5 µg l−1 and 0.01 to 0.09, respectively. The highest TLd-HC concentration values were found in the 0– 50 m surface layer, coinciding with phytoplankton biomass. Significant correlations (p
