FN Archimer Export Format
PT J
TI Dynamics of spatial patterns of microphytobenthic biomass: inferences from a geostatistical analysis of two comprehensive surveys in Marennes-Oleron bay (France)
BT 
AF GUARINI, Jean-Marc
   BLANCHARD, Gérard F
   BACHER, Cedric
   GROS, Philippe
   RIERA, P
   RICHARD, P
   GOULEAU, D
   GALOIS, R
   PROU, Jean
   SAURIAU, P.G.
AS 1:1,2;2:1,2;3:1,2;4:3;5:1,2;6:1,2;7:1,2;8:1,2;9:1,2;10:1,2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 CNRS, Ctr Rech Ecol Marine & Aquaculture Houmeau, IFREMER, CNRS, F-17137 Lhoumeau, France.
   IFREMER, Ctr Rech Ecol Marine & Aquaculture Houmeau, IFREMER, CNRS, F-17137 Lhoumeau, France.
   IFREMER, Ctr Brest, F-29280 Plouzane, France.
C2 CNRS, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
IN WOS Ifremer jusqu'en 2018
IF 1.928
TC 88
UR https://archimer.ifremer.fr/doc/00447/55852/58117.pdf
LA English
DT Article
DE ;microphytobenthos;chlorophyll a;spatial distribution;geostatistics;intertidal mudflat
AB Microphytobenthos plays an important role as primary producer in shallow embayments subject to a tidal regime. The present paper aims to characterize the spatial patterns of sedimentary chlorophyll a (chl a) biomass in 2 seasons in the wide intertidal mudflats of the Marennes-Oleron Bay (France); furthermore, it provides estimates of total microphytobenthic biomass. Accordingly, a systematic sampling scheme was performed in June 1995 and in January 1996. On average, biomass was higher in June (ca 120 mg chi a m(-2)) than in January (ca 85 mg chi a m(-2)). Moreover, the geostatistical analysis revealed that spatial similarities were propagated over larger distances in June (6 km) than in January (2.2 km). In order to account or this result, we suggest that seasonal dynamics of benthic microalgae biomass obeys a 'constant-density model' that describes the alternating spreading/shrinkage phenomenon around the few persistent patches of maximum biomass (ca 300 mg chi a m-2). Total biomass estimates were ca 13 t chl a (SE = 0.26) in June and 10 t chi a (SE = 0.28) in January. Calculating a raw approximation of the growth rate (0.1 d(-1)) of that biomass and considering that the total produced biomass is resuspended at flood tide, we found that microphytobenthos supplies about 2 mu g chi a l(-1), which corresponds to 30-90 % of the chi a suspended in the water column, depending on the season. This suggests that microphytobenthos could be a major food source for secondary producers in both pelagic and benthic ecosystems of the Marennes-Oleron Bay. 
PY 1998
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 166
UT 000074431800012
BP 131
EP 141
DI 10.3354/meps166131
ID 55852
ER

EF