Title :

Spatio-temporal variability of intertidal benthic primary production and respiration in the western part of the Mont Saint-Michel Bay (Western English Channel, France)

Author(s) :

Davoult, Dominique [Auteur correspondant]
Adaptation et diversité en milieu marin [ADMM]
Station biologique de Roscoff = Roscoff Marine Station [SBR]
Migné, Aline [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Adaptation et diversité en milieu marin [ADMM]
Station biologique de Roscoff = Roscoff Marine Station [SBR]
Créach, A. [Auteur]
Génétique et évolution des populations végétales [GEPV]
Gevaert, Francois [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Hubas, Cédric [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Ecogéochimie et Fonctionnement des Ecosystèmes Benthiques [EFEB]
Station biologique de Roscoff = Roscoff Marine Station [SBR]
Adaptation et diversité en milieu marin [ADMM]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Spilmont, Nicolas [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Boucher, Guy [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]

Journal title :

HYDROBIOLOGIA

Pages :

163–172

Publisher :

Springer

Publication date :

2009

ISSN :

0018-8158

English keyword(s) :

In situ measurements
Microphytobenthos
Intertidal community metabolism
Benthic primary production
Community respiration
PAM fluorometry

HAL domain(s) :

Sciences du Vivant [q-bio]/Ecologie, Environnement

English abstract : [en]

In situ measurements of both community metabolism (primary production and respiration) and PAM fluorometry were conducted during emersion on intertidal sediments in the Mont Saint-Michel Bay, in areas where oysters and ...
Show more >In situ measurements of both community metabolism (primary production and respiration) and PAM fluorometry were conducted during emersion on intertidal sediments in the Mont Saint-Michel Bay, in areas where oysters and mussels were cultivated. Results highlighted a low benthic metabolism compared to other intertidal areas previously investigated with the same methods. Comparisons between gross community primary production and relative electron transport rates confirmed this statement. More specifically, primary productivity remained very low all over the year, whereas the associated microalgal biomass was estimated to be high. We suggest that the microphytobenthic community studied was characterized by a self-limitation of its primary productivity by its own biomass, as previously shown in Marennes-Oléron Bay for example. The almost permanent high biomass would represent a limiting factor for micromigration processes within the first millimetres of the sediment. This could be explained by very low resuspension processes occurring in the western part of the bay, enhanced by the occurrence of numerous aquaculture structures that could decrease tidal currents in the benthic boundary layerShow less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL