@article{fdi:010094843,
  title = {{C}ontrasting trends in phytoplankton diversity, size structure, and carbon burial efficiency in the {M}editerranean {S}ea under shifting environmental conditions},
  author = {{G}odbillot, {C}amille and {P}esenti, {B}. and {L}eblanc, {K}. and {B}eaufort, {L}. and {C}hevalier, {C}rist{\`e}le and {D}i {P}ane, {J}. and de {M}adron, {X}. {D}. and de {G}aridel-{T}horon, {T}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}hifts in the phytoplankton assemblage induced by environmental changes have significant implications for carbon cycling and marine food webs, but remain poorly constrained across spatiotemporal scales. {H}ere, we investigate the effects of rising sea surface temperatures and increased stratification on the phytoplankton composition and size in the northwestern {M}editerranean {S}ea (2010-2019) using two sediment trap series: one in the oligotrophic {L}igurian {S}ea and the other in the deep convection zone of the {G}ulf of {L}ion. {W}e apply deep learning image analysis to quantify phytoplankton particle fluxes, size distributions, and relative assemblages, focusing on coccolithophores, diatoms, and silicoflagellates. {O}ur results show a general decline of phytoplankton fluxes to the seafloor, mirroring the decrease in vertical mixing in the water column. {B}oth sites show a shift toward phytoplankton species adapted to stratified and nutrient-depleted conditions, although with contrasting patterns. {I}n the {L}igurian {S}ea, deep-dwelling coccolithophore species become dominant, while in the {G}ulf of {L}ion, summer-associated siliceous species, including large diatoms and silicoflagellates, show an increase. {T}hese contrasted trends, which likely result from differences in nutrient inputs and p{H} changes in the surface between the two sites, have implications for the efficiency of carbon export pathways at depth. {S}pecifically, the increasing dominance of smaller phytoplankton in the {L}igurian {S}ea leads to a reduction in carbon burial efficiency, while in the {G}ulf of {L}ion, the enhanced contribution of larger diatoms may sustain higher export and burial rates in the future.},
  keywords = {phytoplankton ; carbon cycle ; climate change ; {M}editerranean sea ; stratification ; coccolithophores ; {MEDITERRANEE}},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch : {O}ceans},
  volume = {130},
  numero = {8},
  pages = {e2025{JC}022486 [23 ]},
  ISSN = {2169-9275},
  year = {2025},
  DOI = {10.1029/2025jc022486},
  URL = {https://www.documentation.ird.fr/hor/fdi:010094843},
}