FN Archimer Export Format
PT J
TI Distribution of picophytoplankton and nanophytoplankton along an anthropogenic eutrophication gradient in French Mediterranean coastal lagoons
BT 
AF BEC, Beatrice
   COLLOS, Yves
   SOUCHU, Philippe
   VAQUER, Andre
   LAUTIER, Jacques
   FIANDRINO, Annie
   BENAU, Laurent
   ORSONI, Valerie
   LAUGIER, Thierry
AS 1:1;2:1;3:2;4:1;5:1;6:2;7:2;8:3;9:2;
FF 1:;2:;3:PDG-ODE-LER-LERMPL;4:;5:;6:PDG-ODE-LER-LERLR;7:PDG-DEL-LERLR;8:PDG-ODE-LER-LERPAC;9:PDG-RBE-LEADNC;
C1 Univ Montpellier 2, Lab Ecosyst Lagunaires, CNRS, IFREMER,UMR 5119,IRD, F-34095 Montpellier 5, France.
   Ifremer LER LR, F-34203 Sete, France.
   IFREMER, LER Corse, F-20600 Bastia, France.
C2 UNIV MONTPELLIER, FRANCE
   IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
   SETE
   CORSE
   NOUMEA
SE PDG-ODE-LER-LERMPL
   PDG-ODE-LER-LERLR
   PDG-DEL-LERLR
   PDG-ODE-LER-LERPAC
   PDG-RBE-LEADNC
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.393
TC 71
UR https://archimer.ifremer.fr/doc/00031/14267/11547.pdf
LA English
DT Article
DE ;Autotrophic picoeukaryotes;Picocyanobacteria;Nanophytoplankton;Abundance;Biomass;Eutrophication;Mediterranean lagoons
AB We explored the role of natural and anthropogenic environmental perturbations in shaping the community structure and dynamics of pico- and nanophytoplankton in coastal waters. The distribution patterns of phycoerythrin-rich picocyanobacteria (PE-CYAN) and phycocyanin-rich picocyanobacteria (PC-CYAN), autotrophic picoeukaryotes (PEUK) and nanophytoplankton (NANO) were examined over a period of 3 yr in 24 Mediterranean coastal lagoons displaying wide trophic gradients (from 0.2 to 630 mu g chlorophyll a [chl a] l(-1)) and salinity gradients (from fresh to marine waters). In summer, picoplanktonic abundances reached 3 x 10(8) cells l(-1), 5 x 10(9) cells l(-1) and 6 x 10(10) cells l(-1) for PE-CYAN, PC-CYAN and PEUK, respectively. PE-CYAN and PC-CYAN showed opposing responses to environmental gradients, resulting in a restricted dominance of PE-CYAN in oligotrophic marine lagoons and a dominance of PC-CYAN in some eutrophic brackish lagoons. Most lagoons exhibited steady-state nutrient conditions, giving competitive advantages to small eukaryotic algae, even in eutrophic and hypertrophic waters. Among the picophytoplankton, picoeukaryotes (ca. 2 to 3 mu m) are the most competitive with increasing nutrient availability; in terms of abundance and biomass, their relative and absolute importance tended to increase with increasing total chl a biomass. Freshwater discharges resulted in large pulses of nutrient and more turbulent systems that altered the structure of the phytoplankton community and stimulated fast-growing NANO composed of phytoflagellates and diatoms (ca. 3 to 6 mu m, up to 1.6 x 10(9) cells l(-1)). Members of the microphytoplankton (ca. 20 to 200 mu m) were rarely observed in eutrophic and hypertrophic lagoons and were composed of harmful dinoflagellates in oligotrophic lagoons. These results show that anthropogenic and meteorological changes are highly influential on the composition and size structure of phytoplankton communities.
PY 2011
PD FEB
SO Aquatic Microbial Ecology
SN 0948-3055
PU Inter-research
VL 63
IS 1
UT 000287818000004
BP 29
EP 45
DI 10.3354/ame01480
ID 14267
ER

EF