Comparative Study of Microbial Diversity in Different Coastal Aquifers: Determining Factors

Coastal aquifers have been extensively studied from the hydrodynamic and geochemical points of view, but there is still a significant gap in knowledge their microbial diversity. The bacterial communities four coastal at different depths salinities were order to infer anthropogenic physico-chemical influences on groundwater microbiota. At level, samples aquifers, with similar salinities, are more than those taken within same aquifer. community phylum level shows dominance Proteobacteria, Firmicutes, Actinobacteria. Samples aquifer, although having very characteristics. Therefore, taxa present these media resilient environmental variations. aquifer preserving most pristine conditions harbors lowest values biodiversity, compared affected by anthropic activities. incorporation pollutants into favors development so-called “rare biosphere”, consisting high number which represent low percentage (<1%) total community. analysis biodiversity could be used as an indicator degree alteration.