Spatio-temporal distribution of physicochemical and bacteriological parameters in the north area of Monastir bay, eastern coast of Tunisia

  • Sami ZaafraneEmail author
  • Kaouthar Maatouk
  • Fourat Akrout
  • Ismail Trabelsi
  • Neila Drira
Original Paper


Temporal characterization of physicochemical and bacteriological parameters of the Monastir bay was conducted out on 12 stations, during six sampling periods in 2014. Results showed a seasonal variation on the physicochemical parameters of the water masses (temperature, salinity, oxygen, pH, and turbidity) and well-oxygenated waters. Results indicated the absence of mineral phosphorus and the presence of low concentration of organic phosphorus in the stations close the coastline. Mineral nitrogen represented completely by nitrate, and organic nitrogen was detected everywhere during all sampling periods without any particular distribution. Chlorophyll-a concentrations present at low ratio characterizing an oligotrophic ecosystem showed two peaks, one during spring (April, May) and second in fall (September), and were significantly correlated with temperature (R2 = 0.82). Statistical analysis of different physicochemical parameters showed a correlation between temperature pH and oxygen. ANOVA tests showed a significant difference inter-sampling periods and between stations. Bacterial flora is dominated by halotolerant germs, which showed higher concentrations in the southern part of the studied area and are inversely correlated with salinity, turbidity, oxygen, and organic nitrogen (respectively R2 = − 0.62; − 0.79; − 0.84; − 0.72). The same evolution pattern was observed in mesophilic non-halo-obligate microflora. The Vibrionaceae concentration was correlated with water temperature and was within the standards for marine waters. Fecal coliform bacteria are absent in the studied area during all sampling periods. No particularity in water quality was noticed in this ecosystem, which characterized a good state. However, one can say that the collected data on physicochemical and bacteriological evolution can provide baseline information for assisting management of the Monastir bay, which represented a typical and important model of south Mediterranean Sea.


Marine water Physicochemical parameters Mesophilic germs Nutrients 


Funding information

This work was funded by the Ministry of Agriculture, Water Resources and Fisheries and by the Institution of Research and Agricultural Higher Education. The authors also thank the National Institute of Marine Science and Technology.


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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  • Sami Zaafrane
    • 1
    Email author
  • Kaouthar Maatouk
    • 1
  • Fourat Akrout
    • 2
  • Ismail Trabelsi
    • 3
  • Neila Drira
    • 4
  1. 1.Institut National des Sciences et de Technologies de la MerMonastirTunisia
  2. 2.Institut National des Sciences et de Technologies de la Mer centre de la Goulette Port de pêche la GouletteLa GouletteTunisia
  3. 3.Centre de Recherche et des Technologies des Eaux Technopole de Borj-Cédria - Route touristique de SolimanSolimanTunisia
  4. 4.Faculté des Sciences Techniques de Monastir Avenue de l”EnvironnementMonastirTunisia

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