Dynamics of particulate organic matter composition in coastal systems: a spatio-temporal study at multi-systems scale

Camilla Liénart; Nicolas Savoye; Yann Bozec; Elsa Breton; Pascal Conan; Valérie David; Eric Feunteun; Karine Grangeré; Philippe Kerhervé; Benoit Lebreton; Sébastien Lefebvre; Stéphane L'Helguen; Laure Mousseau; Patrick Raimbault; Pierre Richard; Pascal Riera; Pierre-Guy Sauriau; Gauthier Schaal; Fabien Aubert; Sébastien Aubin; Sabrina Bichon; Christophe Boinet; Line Bourasseau; Martine Bréret; Jocelyne Caparros; Thierry Cariou; Karine Charlier; Pascal Claquin; Vincent Cornille; Anne-Marie Corre; Laurence Costes; Olivier Crispi; Muriel Crouvoisier; Marie Czamanski; Yolanda Del Amo; Hervé Derriennic; Francois Dindinaud; Maïa Durozier; Vincent Hanquiez; Antoine Nowaczyk; Jérémy Devesa; Sophie Ferreira; Michel Fornier; Fabrice Garcia; Nicole Garcia; Sandrine Geslin; Emilie Grossteffan; Aurore Gueux; Julien Guillaudeau; Gaël Guillou; Orianne Joly; Nicolas Lachaussée; Michel Lafont; Jézabel Lamoureux; Eric Lecuyer; Jean-Paul Lehodey; David Lemeille; Cédric Leroux; Eric Macé; Eric Maria; Philippe Pineau; Franck Petit; Mireille Pujo-Pay; Peggy Rimelin-Maury; Emmanuelle Sultan

doi:10.1016/j.pocean.2017.03.001

Dynamics of particulate organic matter composition in coastal systems: a spatio-temporal study at multi-systems scale

Camilla Liénart ¹ Nicolas Savoye ² Yann Bozec ³ Elsa Breton ⁴ Pascal Conan ⁵ Valérie David ⁶ Eric Feunteun ^{7, 1} Karine Grangeré ¹ Philippe Kerhervé ⁸ Benoit Lebreton ^{6, 9} Sébastien Lefebvre ¹⁰ Stéphane L'Helguen ¹¹ Laure Mousseau ¹² Patrick Raimbault ¹³ Pierre Richard ⁶ Pascal Riera ¹⁴ Pierre-Guy Sauriau ⁶ Gauthier Schaal ¹¹ Fabien Aubert ⁶ Sébastien Aubin ¹⁵ Sabrina Bichon ^{16, 17} Christophe Boinet ¹⁸ Line Bourasseau ¹⁹ Martine Bréret ⁶ Jocelyne Caparros ⁵ Thierry Cariou ²⁰ Karine Charlier ¹⁹ Pascal Claquin ¹ Vincent Cornille ⁴ Anne-Marie Corre ¹¹ Laurence Costes ²¹ Olivier Crispi ²² Muriel Crouvoisier ²³ Marie Czamanski ²⁴ Yolanda Del Amo ² Hervé Derriennic ¹⁹ Francois Dindinaud ² Maïa Durozier ¹² Vincent Hanquiez ² Antoine Nowaczyk ²⁵ Jérémy Devesa ¹¹ Sophie Ferreira ²⁶ Michel Fornier ¹³ Fabrice Garcia ¹³ Nicole Garcia ¹³ Sandrine Geslin ⁷ Emilie Grossteffan ²⁷ Aurore Gueux ⁵ Julien Guillaudeau ⁷ Gaël Guillou ⁶ Orianne Joly ²⁸ Nicolas Lachaussée ⁶ Michel Lafont ²⁹ Jézabel Lamoureux ⁷ Eric Lecuyer ⁴ Jean-Paul Lehodey ^{1, 30, 28} David Lemeille ²⁸ Cédric Leroux ²⁰ Eric Macé ³¹ Eric Maria ⁵ Philippe Pineau ⁶ Franck Petit ¹² Mireille Pujo-Pay ⁵ Peggy Rimelin-Maury ²⁴ Emmanuelle Sultan ⁷

1 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques

2 EPOC - Environnements et Paléoenvironnements OCéaniques

3 CHIM - CHImie Marine

ADMM - Adaptation et diversité en milieu marin

4 LOG - Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187

5 LOMIC - Laboratoire d'Océanographie Microbienne

6 LIENSs - LIttoral ENvironnement et Sociétés - UMR 7266

7 CRESCO - Centre de recherche et d'enseignement des systèmes côtiers

8 CEFREM - Centre de Formation et de Recherche sur les Environnements Méditérranéens

9 Harte Research Institute for Gulf of Mexico Studies, Texas A&M University – Corpus Christi

10 USC 1233 / RS2GP - Rongeurs Sauvages – Risques Sanitaires et Gestion des Populations

11 LEMAR - Laboratoire des Sciences de l'Environnement Marin (LEMAR)

12 LOV - Laboratoire d'océanographie de Villefranche

13 MIO - Institut méditerranéen d'océanologie

14 EFEB - Ecogéochimie et Fonctionnement des Ecosystèmes Benthiques

ADMM - Adaptation et diversité en milieu marin

15 GSII - ESEO-GSII

ESEO-Tech

16 CNRS 5320

17 UPR8641 - Centre de recherche Paul Pascal, CNRS, Université de Bordeaux

18 Station marine Dinard

19 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux

20 SBR - Station biologique de Roscoff [Roscoff]

21 NutriNeur0 - Nutrition et Neurobiologie intégrée

22 OVSG-IPGP

23 I2BC - Institut de Biologie Intégrative de la Cellule

24 UBO - Université de Brest

25 EMBIO

MIO - Institut méditerranéen d'océanologie

26 OASU - Observatoire aquitain des sciences de l'univers

27 UMS 3113

28 CREC - Centre de recherches en environnement côtier

29 UR BELY - Biologie des écosystèmes aquatiques

30 NU - Normandie Université

31 CED - Centre Émile Durkheim

Abstract : In coastal systems, the multiplicity of sources fueling the pool of particulate organic matter (POM) leads to divergent estimations of POM composition. Eleven systems (two littoral systems, eight embayments and semi-enclosed systems and one estuary) distributed along the three maritime façades of France were studied for two to eight years in order to quantify the relative contribution of organic matter sources to the surface-water POM pool in coastal systems. This study was based on carbon and nitrogen elemental and isotopic ratios, used for running mixing models. The POM of the estuary is dominated by terrestrial material (93% on average), whereas the POM of the other systems is dominated by phytoplankton (84% on average). Nevertheless, for the latter systems, the POM composition varies in space, with 1) systems where POM is highly composed of phytoplankton (≥ 93%), 2) systems characterized by a non-negligible contribution of benthic (8 to 19%) and/or riverine (7 to 19%) sources, and 3) the Mediterranean systems characterized by the contribution of diazotroph organisms (ca. 14%). A continent-to-ocean gradient of riverine and/or benthic POM contribution is observed. Finally, time series reveal 1) seasonal variations of POM composition, 2) differences in seasonality between systems, and 3) an inshore-offshore gradient of seasonality within each system that were sampled at several stations. Spatial and seasonal patterns of POM composition are mainly due to local to regional processes such as hydrodynamics and sedimentary hydrodynamic (e.g. resuspension processes, changes in river flows, wind patterns influencing along-shore currents) but also due to the geomorphology of the systems (depth of the water column, distance to the shore). Future studies investigating the link between these forcings and POM composition would help to better understand the dynamics of POM composition in coastal systems.

Keywords : chibido C and N stable isotopes ACL mixing model meta-analysis france particulate organic matter C:N ratio coastal systems

Type de document :

Article dans une revue

Progress in Oceanography, Elsevier, 2017, 156, pp.221-239. 〈10.1016/j.pocean.2017.03.001〉

Domaine :

Sciences de l'environnement / Biodiversité et Ecologie

Liste complète des métadonnées

https://hal.univ-brest.fr/hal-01510337
Contributeur : Luis Tito de Morais <>
Soumis le : mercredi 19 avril 2017 - 13:54:41
Dernière modification le : mardi 12 février 2019 - 09:50:03

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