Evidence for anaerobic bacterial processes in the water column: denitrification and dissimilatory nitrate ammonification in the northwestern Mediterranean Sea - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Marine Ecology Progress Series Année : 1997

Evidence for anaerobic bacterial processes in the water column: denitrification and dissimilatory nitrate ammonification in the northwestern Mediterranean Sea

Résumé

Bacterial anaerobic processes in particles in the water column of the northwestern Mediterranean Sea were investigated. Particles concentrated on a filter were incubated in oxygen-free sterile sea water. Results demonstrated that there is a weak but almost constant expression of bacterial nitrate-dissimilation processes [denitrification and dissimilatory nitrate ammonification (DAP)] associated with particles. Both activities were found from 30 m down to 615 m depth in coastal water off Marseilles, France, in autumn and from 100 to 700 m depth in spring and autumn in coastal water off Nice. In summer when oligotrophic conditions occurred, both activities were just detectable. In the other seasons, denitrification was the main process of nitrate dissimilation, with peak activity in autumn. This activity was associated with both large and small particles. In contrast, nitrate ammonification was associated only with large particles that were located in the upper layer in autumn and spread throughout the water column in spring.
Fichier principal
Vignette du fichier
m160p047.pdf (1010.1 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-00708672 , version 1 (10-05-2021)

Licence

Paternité

Identifiants

  • HAL Id : hal-00708672 , version 1

Citer

Valerie Michotey, Patricia Bonin. Evidence for anaerobic bacterial processes in the water column: denitrification and dissimilatory nitrate ammonification in the northwestern Mediterranean Sea. Marine Ecology Progress Series, 1997, 160, pp.47-56. ⟨hal-00708672⟩
416 Consultations
71 Téléchargements

Partager

Gmail Facebook X LinkedIn More