@article{fdi:010080469,
  title = {{P}rokaryotic diversity and distribution along physical and nutrient gradients in the {T}unisian coastal waters ({S}outh {M}editerranean {S}ea)},
  author = {{Q}u{\'e}m{\'e}neur, {M}arianne and {H}assen, {M}. {B}. and {A}rmougom, {F}abrice and {K}hammeri, {Y}. and {L}ajnef, {R}. and {B}ellaaj-{Z}ouari, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}rokaryotes play an important role in biogeochemical cycling in marine ecosystems, but little is known about their diversity and composition, and how they may contribute to the ecological functioning of coastal areas in the {S}outh {M}editerranean {S}ea. {T}his study investigated bacterial and archaeal community diversity in seawater samples along the {T}unisian coast subject to important physicochemical disturbances. {T}he 16{S} amplicon sequencing survey revealed higher prokaryotic diversity in the northern {T}unisian bays than in southeastern waters ({G}ulf of {G}abes). {T}he major taxonomic groups identified in all samples were {A}lphaproteobacteria (40.9%), {G}ammaproteobacteria (18.7%), {M}arine {G}roup {II} {E}uryarchaeota (11.3%), and {C}yanobacteria (10.9%). {A}mong them, the relative abundance of {A}lteromonadales, {P}rochlorococcus, and some clades of {P}elagibacterales ({SAR}11) significantly differed between the northern and the southern bays, whereas no difference was observed across coastal waters in the archaeal {C}andidatus {P}oseidoniales ({MGII}), {S}ynechococcus, and {P}elagibacteraceae ({SAR}11 clade {I}a), for which no relationship was observed with the environmental variables. {B}oth {P}seudoalteromonas and {A}lteromonas levels increased with the increasing salinity, density and nutrients ({NH}4+ and/or {PO}43-) gradients detected toward the southern waters, while the {SAR}11 clades {I}b and {IV} and {P}rochlorococcus, decreased in the shallow, salty and nutrient-rich coastal waters of the {G}ulf of {G}abes. {R}hodobacteraceae was positively correlated with {S}ynechococcus and chlorophyll levels, suggesting a relationship with phytoplankton biomass. {T}he present study provides the first insights into planktonic prokaryotic community composition in the {S}outh {M}editerranean {S}ea through the analysis of {T}unisian seawaters, which may support further investigations on the role of bacterioplankton in the biogeochemistry of these ecosystems.},
  keywords = {bacteria ; archaea ; bacterioplankton ; diversity ; {T}unisia ; {G}ulf of {G}abes ; seawater ; {TUNISIE} ; {MEDITERRANEE} ; {GABES} {GOLFE}},
  booktitle = {},
  journal = {{F}rontiers in {M}icrobiology},
  volume = {11},
  numero = {},
  pages = {593540 [14 ]},
  ISSN = {1664-302{X}},
  year = {2020},
  DOI = {10.3389/fmicb.2020.593540},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080469},
}