@article{fdi:010063936, title = {{P}hytoplankton plasticity drives large variability in carbon fixation efficiency}, author = {{A}yata, {S}. {D}. and {L}evy, {M}. and {A}umont, {O}livier and {R}esplandy, {L}. and {T}agliabue, {A}. and {S}ciandra, {A}. and {B}ernard, {O}.}, editor = {}, language = {{ENG}}, abstract = {{P}hytoplankton {C}:{N} stoichiometry is highly flexible due to physiological plasticity, which could lead to high variations in carbon fixation efficiency (carbon consumption relative to nitrogen). {H}owever, the magnitude, as well as the spatial and temporal scales of variability, remains poorly constrained. {W}e used a high-resolution biogeochemical model resolving various scales from small to high, spatially and temporally, in order to quantify and better understand this variability. {W}e find that phytoplankton {C}:{N} ratio is highly variable at all spatial and temporal scales (5-12mol{C}/mol{N}), from mesoscale to regional scale, and is mainly driven by nitrogen supply. {C}arbon fixation efficiency varies accordingly at all scales (30%), with higher values under oligotrophic conditions and lower values under eutrophic conditions. {H}ence, phytoplankton plasticity may act as a buffer by attenuating carbon sequestration variability. {O}ur results have implications for in situ estimations of {C}:{N} ratios and for future predictions under high {CO}2 world.}, keywords = {phytoplankton ; production ; stoichiometry ; model ; {ATLANTIQUE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {41}, numero = {24}, pages = {8994--9000}, ISSN = {0094-8276}, year = {2014}, DOI = {10.1002/2014gl062249}, URL = {https://www.documentation.ird.fr/hor/fdi:010063936}, }