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

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

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

11 LOV - Laboratoire d'océanographie de Villefranche

12 MIO - Institut méditerranéen d'océanologie

13 EFEB - Ecogéochimie et Fonctionnement des Ecosystèmes Benthiques

ADMM - Adaptation et diversité en milieu marin

14 GSII - ESEO-GSII

ESEO-Tech

15 CNRS 5320

16 CRPP - Centre de Recherche Paul Pascal

17 Station marine Dinard

18 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux

19 SBR - Station biologique de Roscoff [Roscoff]

20 NutriNeur0 - Nutrition et Neurobiologie intégrée

21 OVSG-IPGP

22 I2BC - Institut de Biologie Intégrative de la Cellule

23 UBO - Université de Brest

24 EMBIO

MIO - Institut méditerranéen d'océanologie

25 OASU - Observatoire aquitain des sciences de l'univers

26 UMS 3113

27 CREC - Centre de recherches en environnement côtier

28 UR BELY - Biologie des écosystèmes aquatiques

29 NU - Normandie Université

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

Document type :

Journal articles

Domain :

Environmental Sciences / Biodiversity and Ecology

Complete list of metadatas

https://hal.univ-brest.fr/hal-01510337
Contributor : Luis Tito de Morais <>
Submitted on : Wednesday, April 19, 2017 - 1:54:41 PM
Last modification on : Saturday, October 19, 2019 - 1:18:49 AM

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

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

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