FN Archimer Export Format
PT J
TI Nutrient and phytoplankton distribution in the Loire River plume (Bay of Biscay, France) resolved by a new Fine Scale Sampler
BT 
AF LUNVEN, Michel
   GUILLAUD, Jean-Francois
   YOUENOU, Agnes
   CRASSOUS, Marie-Pierre
   BERRIC, Roger
   LE GALL, Erwan
   KEROUEL, Roger
   LABRY, Claire
   AMINOT, Alain
AS 1:1;2:1;3:1;4:1;5:2;6:1;7:1;8:1;9:;
FF 1:PDG-DOP-DCB-DYNECO-PELAGOS;2:PDG-DOP-DCB-DYNECO-PELAGOS;3:PDG-DOP-DCB-DYNECO-PELAGOS;4:PDG-DOP-DCB-DYNECO-PELAGOS;5:PDG-DOP-DCB-TSI-DM;6:PDG-DOP-DCB-DYNECO-PELAGOS;7:PDG-DOP-DCB-DYNECO-PELAGOS;8:PDG-DOP-DCB-DYNECO-PELAGOS;9:PDG-DOP-DCB-DYNECO-PELAGOS;
C1 IFREMER, DYNECO, F-29280 Brest, France.
   IFREMER, TSI, F-29280 Brest, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-DYNECO-PELAGOS
   PDG-DOP-DCB-TSI-DM
IN WOS Ifremer jusqu'en 2018
IF 1.633
TC 59
UR https://archimer.ifremer.fr/doc/2005/publication-533.pdf
LA English
DT Article
CR GASPROD 1
   GASPROD 2
   VILOIR
BO Thalassa
   Côtes De La Manche
DE ;Plankton patchiness;Density discontinuity;Sampling;Thin layer;Nutrients;Phytoplankton
AB A new Fine Scale Sampler (FSS) was designed and used in the Loire River plume (Bay of Biscay, France) in order to study phytoplankton distribution in highly stratified water columns. The FSS consists of a linear array of 15 sampling bottles, set horizontally at 20 cm intervals. Data acquired from the CTD and fluorescence probe of the FSS enable it to be precisely positioned at the depth of the highest density gradient or at the chlorophyll a maximum. The FSS made it possible to investigate fine scale vertical distribution of phytoplankton and relationships with water density, nutrient concentrations or light availability, for spring and summer conditions. Under spring conditions, the entire upper layer exhibited a dominant diatom population (Chaetoceros sociale, Thalassiosira rotula) above 15 m with evident uptake in dissolved inorganic nutrients and the maximum concentration of dinoflagellates (mainly small forms of Gymnodinium spp. and Gyrodinium spp.) was located 16 m deep, where light energy began to be a limiting factor for phytoplankton growth. During summer conditions, the maximum phytoplankton biomass (10 μg l−1 of chlorophyll a) was only concentrated in the 2 m thick pycnocline layer, located at a depth of 12 m. The diatom C. sociale was dominant in the phytoplankton peak. Dinoflagellates (Dinophysis acuminata and Gymnodinium spp.) were also concentrated around the density gradient. Low inorganic nitrogen concentration (<0.2 μmol l−1) was responsible for the limitation of phytoplankton production in the surface layer above the pycnocline, and the phytoplankton growth was irradiance-limited underneath the pycnocline.
PY 2005
PD OCT
SO Estuarine, Coastal and Shelf Science
SN 0272-7714
PU Elsevier
VL 65
IS 1-2
UT 000232643700009
BP 94
EP 108
DI 10.1016/j.ecss.2005.06.001
ID 533
ER

EF