Characterisation and dynamics of dissolved organic matter in the Northwestern Mediterranean Sea
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Oui |
| Statut de publication | : | Publié |
| Année de publication | : | 2013 |
| Auteurs (7) | : | JONES Vera MEADOR T,b GOGOU A MIGON Christophe PENKMAN K,e,h COLLINS M,j REPETA D,j |
| Revue scientifique | : | Progress In Oceanography |
| Volume | : | 119 |
| Fascicule | : | |
| Pages | : | 78-89 |
| DOI | : | 10.1016/j.pocean.2013.06.007 |
| URL | : | <go to isi>://wos:000329018600008 |
| Abstract | : | The aim of this study was to investigate the chemical composition and cycling of dissolved organic matter (DOM), focusing on the influence of thermal stratification and mixing. Samples were collected at the surface, 500 m and 1500 m, in April, July and October 2004 at the DYFAMED time-series site in the North-western Mediterranean. High molecular weight (HMW) DOM was concentrated using ultrafiltration. The HMW DOM fraction was characterised by H-1 NMR, amino acid and neutral sugar analysis. Results were interpreted in the context of the wealth of information available on site DYFAMED. Three key observations were made. Firstly, the carbohydrate component of DOM decreased with depth, in agreement with previous studies, indicating degradation of this labile material. Secondly, the July surface water sample was particularly carbohydrate rich; it is proposed this may be the result of increased carbohydrate production by phytoplankton under low nutrient conditions, and accumulation in the surface layers due to stratification of the water column. Finally, the October samples showed a distinctly different chemical signature to the April and July samples, potentially indicating a shift from a net production system in the spring and summer to a net re-mineralisation system in autumn. The results of this study offer an insight into the dynamic nature of DOM at station DYFAMED. (C) 2013 Elsevier Ltd. All rights reserved. |
| Mots-clés | : | enantiomeric amino-acids chemical-characterization neutral sugars surface waters doc dynamics ocean seawater ratios carbon circulation Oceanography |
| Commentaire | : | ISI Document Delivery No.: 280HF Times Cited: 2 Cited Reference Count: 51 Jones, V. Meador, T. B. Gogou, A. Migon, C. Penkman, K. E. H. Collins, M. J. Repeta, D. J. European Union Marie Curie programme (project CHARMAD) [500597]; US National Science Foundation Center for Microbial Oceanography Research and Education; Hellenic GSRT/European Union [180] The authors would like thank the European Union Marie Curie programme (project CHARMAD; Grant No. 500597) and the US National Science Foundation Center for Microbial Oceanography Research and Education for financial support. This work was also partly supported by the MELISSA operation (PROOF programme) and from the Hellenic GSRT/European Union (non-EU Grant No. 180). Core parameters were provided by the Service d'Observation DYFAMED. The authors wish also like to thank: J. Chiaverini, J.-C. Marty, V. Sandroni and crew on Thetys II for help with the sampling; M.-D. Pizay for the TOC analysis; J. Ras for the pigment analysis, F. Kessouri for help with plots; J. Holtvoeth and C. Mahaffey for useful discussions on the manuscript. 2 Pergamon-elsevier science ltd Oxford Si Oceanography |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Jones V, Meador TB, Gogou A, Migon C, Penkman KEH, Collins MJ, Repeta DJ (2013) Characterisation and dynamics of dissolved organic matter in the Northwestern Mediterranean Sea. Prog Oceanogr 119: 78-89 | doi: 10.1016/j.pocean.2013.06.007
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