FN Archimer Export Format
PT J
TI Interannual variability of the initiation of the phytoplankton growing period in two French coastal ecosystems
BT 
AF Poppeschi, Coline
   Charria, Guillaume
   Daniel, Anne
   Verney, Romaric
   Rimmelin-Maury, Peggy
   Retho, Michael
   Goberville, Eric
   Grossteffan, Emilie
   Plus, Martin
AS 1:1;2:1;3:2;4:3;5:4;6:5;7:6;8:4;9:2;
FF 1:PDG-ODE-LOPS-OC;2:PDG-ODE-LOPS-OC;3:PDG-ODE-DYNECO-PELAGOS;4:PDG-ODE-DYNECO-DHYSED;5:;6:PDG-ODE-LITTORAL-LERMPL;7:;8:;9:PDG-ODE-DYNECO-PELAGOS;
C1 Ifremer, Univ. Brest, CNRS, IRD, Laboratory for Ocean Physics and Satellite remote sensing (LOPS), IUEM, 29280 Brest, France
   Ifremer, DYNECO, Pelagic Ecology Laboratory (PELAGOS), 29280 Brest, France
   Ifremer, DYNECO, Hydrosedimentary Dynamics Laboratory (DHYSED), 29280 Brest, France
   OSU-European University Institute of the Sea (IUEM), UMS3113, 29280 Plouzané, France
   Ifremer, Morbihan-Pays de Loire Environment Resources Laboratory (LERMPL), 56100 Lorient, France
   Unité Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Muséum National d’Histoire Naturelle, CNRS, IRD, Sorbonne Université, Université de Caen Normandie, Université des Antilles, Paris, France
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
   IFREMER, FRANCE
   MNHN, FRANCE
SI BREST
   LORIENT
SE PDG-ODE-LOPS-OC
   PDG-ODE-DYNECO-PELAGOS
   PDG-ODE-DYNECO-DHYSED
   PDG-ODE-LITTORAL-LERMPL
UM LOPS
IN WOS Ifremer UPR
   WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-univ-france
IF 4.9
TC 1
UR https://archimer.ifremer.fr/doc/00766/87831/93391.pdf
   https://archimer.ifremer.fr/doc/00766/87831/93392.pdf
   https://archimer.ifremer.fr/doc/00766/87831/98585.pdf
   https://archimer.ifremer.fr/doc/00766/87831/98586.pdf
LA English
DT Article
AB Abstract. Decadal time series of chlorophyll-a concentrations sampled at high and low frequencies are explored to study climate-induced changes on the processes inducing interannual variations in the Initiation of the Phytoplankton Growing Period (IPGP) in early spring. In this study, we specifically detail the IPGP in two contrasting French coastal ecosystems: the Bay of Brest and the Bay of Vilaine. A large interannual variability in the IPGP is observed in both ecosystems in connection with variations of environmental drivers (solar radiation, sea temperature, wind direction and intensity, precipitation, river flow, sea level, currents and turbidity). We show that the IPGP is delayed by around 30 days in 2019 in comparison with 2010. The use of a one-dimensional vertical model coupling hydrodynamics, biogeochemistry and sediment dynamics shows that the IPGP is generally dependent on the interaction between several drivers. Interannual changes are therefore not associated with a unique driver (such as increasing sea surface temperature). Extreme events also impact the IPGP. In both bays, IPGP is sensitive to cold spells and flood events. The interannual variability of the IPGP is significant and strongly conditioned, at the local scale, by a combination of several environmental parameters, with a larger sensitivity to sea temperature and light conditions, linked to the turbidity of the system. While both bays are hydrodynamically contrasted, the processes that modulate IPGP are similar. Keywords Phytoplankton biomass, Long-term in situ observations, Coastal ecosystems, Extreme events, Climate change. 
PY 2022
PD DEC
SO Biogeosciences
SN 1726-4170
PU Copernicus GmbH
VL 19
IS 24
UT 000898884300001
BP 5667
EP 5687
DI 10.5194/bg-19-5667-2022
ID 87831
ER

EF