@article{fdi:010069425,
  title = {{A}ssessing spatial and temporal variability of phytoplankton communities' composition in the {I}roise {S}ea ecosystem ({B}rittany, {F}rance) : a 3{D} modeling approach. {P}art 2 : {L}inking summer mesoscale distribution of phenotypic diversity to hydrodynamism},
  author = {{C}adier, {M}. and {S}ourisseau, {M}. and {G}orgues, {T}homas and {E}dwards, {C}. {A}. and {M}emery, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}idal front ecosystems are especially dynamic environments usually characterized by high phytoplankton biomass and high primary production. {H}owever. the description of functional microbial diversity occurring in these regions remains only partially documented. {I}n this article, we use a numerical model, simulating a large number of phytoplankton phenotypes to explore the three-dimensional spatial patterns of phytoplankton abundance and diversity in the {I}roise {S}ea (western {B}rittany). {O}ur results suggest that, in boreal summer, a seasonally marked tidal front shapes the phytoplankton species richness. {A} diversity maximum is found in the surface mixed layer located slightly west of the tidal front (i.e., not strictly co-localized with high biomass concentrations) which separates tidally mixed from stratified waters. {D}ifferences in phenotypic composition between sub-regions with distinct hydrodynamic regimes (defined by vertical mixing, nutrients gradients and light penetration) are discussed. {L}ocal growth and/or physical transport of phytoplankton phenotypes are shown to explain our simulated diversity distribution. {W}e find that a large fraction (64%) of phenotypes present during the considered period of {S}eptember are ubiquitous, found in the frontal area and on both sides of the front (i.e., over the full simulated domain). {T}he frontal area does not exhibit significant differences between its community composition and that of either the well-mixed region or an offshore {D}eep {C}hlorophyll {M}aximum ({DCM}). {O}nly three phenotypes (out of 77) specifically grow locally and are found at substantial concentration only in the surface diversity maximum. {T}hus, this diversity maximum is composed of a combination of ubiquitous phenotypes with specific picoplankton deriving from offshore, stratified waters (including specific phenotypes from both the surface and the {DCM}) and imported through physical transport, completed by a few local phenotypes. {T}hese results are discussed in light of the three-dimensional general circulation at frontal interfaces. {P}rocesses identified by this study are likely to be common in tidal front environments and may be generalized to other shallow, tidally mixed environments worldwide.},
  keywords = {{P}lankton functional traits ; {B}iodiversity ; {B}iogeography ; {L}ocal ; adaptation ; {D}ynamical transport ; {T}idal front ; {FRANCE} ; {BRETAGNE} ; {IROISE} {MER}},
  booktitle = {},
  journal = {{J}ournal of {M}arine {S}ystems},
  volume = {169},
  numero = {},
  pages = {111--126},
  ISSN = {0924-7963},
  year = {2017},
  DOI = {10.1016/j.jmarsys.2017.01.004},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069425},
}