FN Archimer Export Format
PT J
TI Influence of shellfish farming activities on nitrification, nitrate reduction to ammonium and denitrification at the water-sediment interface of the Thau lagoon, France
BT 
AF GILBERT, F
   SOUCHU, Philippe
   BIANCHI, M
   BONIN, P
AS 1:1;2:2;3:3;4:1;
FF 1:;2:;3:;4:;
C1 UNIV MEDITERRANEE, CTR OCEANOL MARSEILLE, LAB OCEANOG & BIOGEOCHIM, CNRS UMR 6535, F-13288 MARSEILLE 9, FRANCE.
   IFREMER, ECOL LAB, F-34200 SETE, FRANCE.
   CNRS, LAB MICROBIOL MARINE,UPR 223, F-13288 MARSEILLE 9, FRANCE.
C2 UNIV MEDITERRANEE, FRANCE
   IFREMER, FRANCE
   CNRS, FRANCE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.928
TC 114
UR https://archimer.ifremer.fr/doc/00070/18145/15697.pdf
LA English
DT Article
DE ;shellfish farming;nitrogen bacterial processes;nitrification;nitrate reduction to ammonium;denitrification;Thau lagoon;Mediterranean Sea;sediment-water exchanges
AB The seasonal patterns of nitrification, denitrification and dissimilatory ammonium production (DAP) rates were studied in the sediment of 2 stations in the Thau lagoon (south of France). The station ZA was located within the shellfish farming zone and the station B was the reference site. A marked effect of shellfish fanning on bacterial activities was observed. Spatial differences were associated with discrepancies in the organic content and the reduction state of sediments, i.e. highest reductive processes (denitrification and DAP) were noted in shellfish farming area, whereas the oxidative process (nitrification) was predominant outside the farming zone. At both stations, the DAP activity increased in September (autumn) concomitant with an increase of the C/N ratio in the sediment due to the sedimentation of the summer phytoplanktonic production. Nitrification and denitrification rates exhibited maxima in November (winter) corresponding to dissolved inorganic nitrogen inputs from the surrounding land. In the shellfish farming site, 98 % of nitrate was reduced to NH4+ and 2 % to N2O showing that the most of the NO3- was reduced to ammonium and remained available for the ecosystem.
PY 1997
SO Marine Ecology-progress Series
SN 0171-8630
PU Inter-research
VL 151
IS 1-3
UT A1997XE68700015
BP 143
EP 153
DI 10.3354/meps151143
ID 18145
ER

EF