FN Archimer Export Format
PT J
TI Spatio-temporal variations in intertidal mudflat erodability: Marennes-Oleron Bay, western France
BT 
AF ORVAIN, Francis
   SAURIAU, Pierre-Guy
   LE HIR, Pierre
   GUILLOU, Gael
   CANN, Philippe
   PAILLARD, Michel
AS 1:1;2:2;3:3;4:2;5:3;6:3;
FF 1:;2:;3:PDG-DOP-DCB-DYNECO-PHYSED;4:;5:PDG-DOP-DCB-DYNECO-PHYSED;6:PDG-DOP-DCB-TSI;
C1 Univ Caen, Lab PE2M, F-14032 Caen, France.
   CNRS, IFREMER, CREMA, UMR 10, F-17137 Houmeau, France.
   IFREMER, Ctr Brest, F-29280 Plouzane, France.
C2 UNIV CAEN, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
SI LA ROCHELLE
   BREST
SE PDG-DOP-DCN-AGSAE-CREMA
   PDG-DOP-DCN-AGSAE-CRELA
   PDG-DOP-DCB-DYNECO-PHYSED
   PDG-DOP-DCB-TSI
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 1.684
TC 34
UR https://archimer.ifremer.fr/doc/2007/publication-3779.pdf
LA English
DT Article
DE ;EPS;Microphytobenthos;Erodability;Intertidal mudflat;Sediment;Scrobicularia plana;Hydrobia ulvae;Bioturbation;Resuspension;Eris
AB A portable erosion device (ERIS) was deployed in November 2000 and May 2001 to investigate the spatio-temporal variation of fine-grained sediment erosion over a transect on the intertidal mudflats of Marennes-Oleron Bay, western France. The objective was to relate changes in bed erodability over diurnal emersion periods to bioturbation, rapid changes in sediment characteristics, and microphytobenthos biomass.   Macrofaunal assemblages were dominated by the bivalve, Scrobicularia plana, on the upper mudflat, and by the gastropod, Hydrobia ulvae. on the middle mudflat. A power relationship was obtained where tau(cr) was plotted as a function of sediment density. Results from the upper part of the mudflat deviated from this relationship due to bioturbation by S. plana. No influence of microphytobenthos (either chlorophyll a or extracellular polymeric substances (EPS) content) was found on tau(cr).The bivalve feeding activities altered consolidated sediments (sediment dry mass concentration of similar to 700 g1(-1)) so that they became resuspended easily (tau(cr) < 1 Pa). Fluff layer erosion was observed, with an erosion rate dependent upon the biomass of H. ulvae. It was also found that bioturbation by H. ulvae was implicated (combined with grazing activities) in chl a resuspension during the erosion of the fluff layer. Snail bioturbation stimulated the chl a enrichment of eroded material. whilst the high snail biomass produced a decrease in suspended chl a due to higher grazing rates. (c) 2007 Published by Elsevier Ltd.
PY 2007
PD MAY
SO Continental Shelf Research
SN 0278-4343
PU Elsevier
VL 27
IS 8
UT 000248038100010
BP 1153
EP 1173
DI 10.1016/j.csr.2006.05.013
ID 3779
ER

EF