Publications des scientifiques de l'IRD

Zaghmouri I., Michotey V. D., Armougom Fabrice, Guasco S., Bonin P. C. (2018). Salinity shifts in marine sediment : importance of number of fluctuation rather than their intensities on bacterial denitrifying community. Marine Pollution Bulletin, 130, p. 76-83. ISSN 0025-326X.

Titre du document
Salinity shifts in marine sediment : importance of number of fluctuation rather than their intensities on bacterial denitrifying community
Année de publication
2018
Type de document
Article référencé dans le Web of Science WOS:000436221000010
Auteurs
Zaghmouri I., Michotey V. D., Armougom Fabrice, Guasco S., Bonin P. C.
Source
Marine Pollution Bulletin, 2018, 130, p. 76-83 ISSN 0025-326X
The sensitivity of denitrifying community to salinity fluctuations was studied in microcosms filled with marine coastal sediments subjected to different salinity disturbances over time (sediment under frequent salinity changes vs sediment with "stable" salinity pattern). Upon short-term salinity shift, denitrification rate and denitrifiers abundance showed high resistance whatever the sediment origin is. Denitrifying community adapted to frequent salinity changes showed high resistance when salinity increases, with a dynamic nosZ relative expression level. Marine sediment denitrifying community, characterized by more stable pattern, was less resistant when salinity decreases. However, after two successive variations of salinity, it shifted toward the characteristic community of fluctuating conditions, with larger proportion of Pseudomonas-nosZ, exhibiting an increase of nosZ relative expression level. The impact of long-term salinity variation upon bacterial community was confirmed at ribosomal level with a higher percentage of Pseudomonas and lower proportion of nosZII Glade genera.
Plan de classement
Ecologie, systèmes aquatiques [036] ; Géologie et formations superficielles [064] ; Biotechnologies [084]
Description Géographique
FRANCE ; MEDITERRANEE
Localisation
Fonds IRD [F B010073198]
Identifiant IRD
fdi:010073198
Contact