@article{fdi:010069284,
  title = {{D}iazotrophic cyanobacteria signatures and their relationship to hydrographic conditions in the {G}ulf of {G}abes, {T}unisia},
  author = {{D}rira, {Z}. and {C}haari, {D}. and {H}amza, {A}. and {H}assen, {M}. {B}. and {P}agano, {M}arc and {A}yadi, {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}hanges in the planktonic cyanobacteria structure, composition and diversity were followed over three consecutive years (2005-2006-2007) in the {G}ulf of {G}abes ({E}astern {M}editerranean {S}ea, {T}unisia). {C}yanobacteria abundances, biomasses and cell lengths were measured together with selected environmental variables (p{H}, salinity, temperature and nutrients). {T}he space and time variations of the cyanobacteria in relation to the environmental factors showed a close relationship between these plankton communities and the hydrographic structure of the water column. {C}yanobacteria developed over semi-mixed conditions ({M}ay-{J}une 2006) and during the thermal stratification ({J}uly 2005). {T}he cyanobacterial abundance and biomass was evident between 20 and 35 m in inshore stations and between 20 and 25 m in deeper stations during the semi-mixing conditions and stratification. {T}his thermocline level coincided with the euphotic layer (21.85 +/- 3.76 m) allowing access of light radiation. {T}he cyanobacteria bloom occurred during {M}ay-{J}une 2006 when the {N}/{P} ratio (<10) was clearly below the accepted standard molar ratio of {N}/{P} = 16/1. {C}ommonalities among cyanobacterial genera include being highly competitive for low concentrations of inorganic {P} ({DIP}) and the ability to acquire organic {P} compounds. {O}ur study showed that both diazotrophic ({N}-2-fixing) cyanobacteria such as {A}nabaena sp., {C}hroococcus sp., {T}richodesmium erythraeum, {S}pirulina sp. and {S}pirulina subsalsa and non-diazotrophic cyanobacteria such as {P}seudoanabaena sp. and {M}icrocystis display a great flexibility in the {N} sources which allow formation of blooms.},
  keywords = {{G}ulf of {G}abes ; diazotrophic cyanobacteria ; water column ; inshore area ; offshore area ; mixing conditions ; stratification ; thermocline ; nutrient compounds ; {N}/{P} ratio ; {TUNISIE} ; {MEDITERRANEE} ; {GABES} {GOLFE}},
  booktitle = {},
  journal = {{J}ournal of the {M}arine {B}iological {A}ssociation of the {U}nited {K}ingdom},
  volume = {97},
  numero = {1},
  pages = {69--80},
  ISSN = {0025-3154},
  year = {2017},
  DOI = {10.1017/s0025315415002210},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069284},
}