FN Archimer Export Format
PT J
TI Biodégradabilité de la matière organique dans le bouchon vaseux et la crème de vase de l'estuaire de la Loire
OT Biodegradability of organic-matter in the water column and fluid mud of the loire estuary
BT 
AF MAURICE, L
AS 1:;
FF 1:;
C1 IFREMER, DIRECT ENVIRONNEMENT LITTORAL, F-83507 LA SEYNE SUR MER, FRANCE
C2 IFREMER, DIRECT ENVIRONNEMENT LITTORAL, F-83507 LA SEYNE SUR MER, FRANCE
IF 0.662
TC 8
UR https://archimer.ifremer.fr/doc/00099/21008/18634.pdf
LA French
DT Article
AB The organic matter trapped in the turbidity maximum zone of the Loire estuary, as a support of bacterial activity, constitutes a basic element in the biogeochemical cycle which permits us to understand the causes of the anoxia observed in September. Measurements of the main physical and chemical parameters and of bacterial biomass were carried out in the water column and in the fluid mud in September 1990 and 1991. The anaerobic fluid mud is presumed to be the centre of fermentation and/or hydrolysis processes; the formation rate of dissolved organic carbon (DOC) in this layer reaches 3 g C.m(-3).d(-1). When particles are suspended in the water column, the organic products formed in the fluid mud are integrated into the aerobic metabolic cycle and contribute to the decrease of dissolved oxygen concentrations in the water column. The fluid mud participates in ammonia regeneration in the turbidity maximum zone; the formation rate of this component ranges from 3 to 10 nmol N-NH4.(g of particulate matter)(-1).h(-1). Causes of the anoxia cannot be studied without a thorough knowledge of the transformation processes of organic and mineral components in the fluid mud.
PY 1994
SO Oceanologica Acta
SN 0399-1784
PU Gauthier-Villars
VL 17
IS 5
UT A1994RN26600004
BP 501
EP 516
ID 21008
ER

EF