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

Camilla Liénart; Nicolas Savoye; Valérie David; Pierre Ramond; Paco Rodriguez Tress; Vincent Hanquiez; Vincent Marieu; Sébastien Aubin; Fabien Aubert; Sabrina Bichon; Christophe Boinet; Line Bourasseau; Yann Bozec; Martine Bréret; Elsa Breton; Jocelyne Caparros; Thierry Cariou; Pascal Claquin; Pascal Conan; Anne-Marie Corre; Laurence Costes; Muriel Crouvoisier; Yolanda del Amo; Hervé Derriennic; Francois Dindinaud; Robert Duran; Maïa Durozier; Jérémy Devesa; Sophie Ferreira; Eric Feunteun; Nicole Garcia; Sandrine Geslin; Emilie Grossteffan; Aurore Gueux; Julien Guillaudeau; Gael Guillou; Orianne Jolly; Nicolas Lachaussée; Michel Lafont; Véronique Lagadec; Jézabel Lamoureux; Béatrice Lauga; Benoit Lebreton; Eric Lecuyer; Jean-Paul Lehodey; Cédric Leroux; Stéphane l'Helguen; Éric Macé; Eric Maria; Laure Mousseau; Antoine Nowaczyk; Philippe Pineau; Franck Petit; Mireille Pujo-Pay; Patrick Raimbault; Peggy Rimmelin-Maury; Vanessa Rouaud; Pierre-Guy Sauriau; Emmanuelle Sultan; Nicolas Suspérregui

doi:10.1016/j.pocean.2018.02.026

Journal articles

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

Camilla Liénart ¹ Nicolas Savoye ¹ Valérie David ¹ Pierre Ramond ² Paco Rodriguez Tress ¹ Vincent Hanquiez ³ Vincent Marieu ³ Sébastien Aubin ^{4, 5} Fabien Aubert ⁶ Sabrina Bichon ¹ Christophe Boinet ⁵ Line Bourasseau ¹ Yann Bozec ⁷ Martine Bréret ⁶ Elsa Breton ⁸ Jocelyne Caparros ⁹ Thierry Cariou ¹⁰ Pascal Claquin ¹¹ Pascal Conan ⁹ Anne-Marie Corre ¹² Laurence Costes ^{13, 1} Muriel Crouvoisier ⁸ Yolanda del Amo ¹ Hervé Derriennic ³ Francois Dindinaud ¹ Robert Duran ¹⁴ Maïa Durozier ¹⁵ Jérémy Devesa ¹⁶ Sophie Ferreira ¹⁷ Eric Feunteun ^{5, 11} Nicole Garcia ^{18, 19} Sandrine Geslin ^{5, 4} Emilie Grossteffan ¹⁶ Aurore Gueux ⁹ Julien Guillaudeau ^{5, 4} Gael Guillou ⁶ Orianne Jolly ²⁰ Nicolas Lachaussée ⁶ Michel Lafont ¹⁹ Véronique Lagadec ¹⁹ Jézabel Lamoureux ^{4, 5} Béatrice Lauga ¹⁴ Benoit Lebreton ⁶ Eric Lecuyer ⁸ Jean-Paul Lehodey ²⁰ Cédric Leroux ¹⁰ Stéphane l'Helguen ¹⁶ Éric Macé ^{21, 10} Eric Maria ⁹ Laure Mousseau ¹⁵ Antoine Nowaczyk ¹ Philippe Pineau ⁶ Franck Petit ¹² Mireille Pujo-Pay ⁹ Patrick Raimbault ^{18, 19} Peggy Rimmelin-Maury ¹⁶ Vanessa Rouaud ¹⁴ Pierre-Guy Sauriau ⁶ Emmanuelle Sultan ^{4, 5} Nicolas Suspérregui ^{14, 22}

1 EPOC - UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux

2 DYNECO - Dynamiques de l'Environnement Côtier

3 EPOC - Environnements et Paléoenvironnements OCéaniques

4 CRESCO - Centre De Recherche et d'Enseignement sur les Systèmes Côtiers

5 Station marine Dinard

6 LIENSs - LIttoral ENvironnement et Sociétés - UMRi 7266

7 CHIM - CHImie Marine

AD2M - Adaptation et diversité en milieu marin

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

9 LOMIC - Laboratoire d'Océanographie Microbienne

10 SBR - Station biologique de Roscoff

11 BOREA - Biologie des Organismes et Ecosystèmes Aquatiques

12 LOV - Laboratoire d'océanographie de Villefranche

13 NutriNeur0 - Nutrition et Neurobiologie intégrée

14 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

15 LOV - Laboratoire d'océanographie de Villefranche

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

17 OASU - Observatoire aquitain des sciences de l'univers

18 LOB - Laboratoire d'océanographie et de biogéochimie

19 MIO - Institut méditerranéen d'océanologie

20 CREC - Centre de recherches en environnement côtier

21 AD2M - Adaptation et diversité en milieu marin

22 Institut des Milieux Aquatiques

Abstract : In costal systems, particulate organic matter (POM) results from a multiplicity of sources having their respective dynamics in terms of production, decomposition, transport and burial. The POM pool experiences thus considerable spatial and temporal variability. In order to better understand this variability, the present study employs statistical multivariate analyses to investigate links between POM composition and environmental forcings for a panel of twelve coastal systems distributed along the three maritime regions of France and monitored weekly to monthly for 1 to 8 years. At multi-system scale, two main gradients of POC composition have been identified: a 'Continent-Ocean' gradient associated with hydrodynamics, sedimentary dynamics and depth of the water column, and a gradient of trophic status related to nutrient availability. At local scale, seasonality of POC composition appears to be station-specific but still related to part of the above-mentioned forcings. A typology of systems was established by coupling spatial and temporal variability of POC composition. Four groups were highlighted: (1) the estuarine stations where POC composition is dominated by terrestrial POM and driven by hydrodynamics and sedimentary processes, (2) the oligotrophic systems, characterized by the contribution of diazotrophs due to low nutrient availability, and the marine meso/eutroph systems whose POC composition is (3) either deeply dominated by phytoplankton or (4) dominated by phytoplankton but where the contribution of continental and benthic POC is not negligible and is driven by hydrodynamics, sedimentary processes and the height of the water column. Finally, the present study provides several insights into the different forcings to POM composition and dynamics in temperate coastal systems at local and multi-system scales. This work also presents a methodological approach that establishes statistical links between forcings and POM composition, helping to gain more objectively insight of forcings.

Keywords : Coastal systems Particulate organic matter Environmental forcing Meta-analysis France ACL

Document type :

Journal articles

Domain :

Environmental Sciences

Sciences of the Universe [physics] / Earth Sciences / Oceanography

Sciences of the Universe [physics] / Continental interfaces, environment

Sciences of the Universe [physics] / Ocean, Atmosphere

Environmental Sciences / Biodiversity and Ecology

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