Microbial communities of polluted sub-surface marine sediments

Antonio Mazzola, Valentina Catania, Salvatrice Vizzini, Paola Quatrini, Simone Cappello, Santina Santisi, Salvatrice Vizzini, Antonio Mazzola

Risultato della ricerca: Article

9 Citazioni (Scopus)

Abstract

Microbial communities of coastal marine sediment play a key role in degradation of petroleum contaminants. Here the bacterial and archaeal communities of sub-surface sediments (5-10 cm) of the chronically polluted Priolo Bay (eastern coast of Sicily, Italy), contaminated mainly by n-alkanes and biodegraded/weathered oils, were characterized by cultural and molecular approaches. 16S-PCR-DGGE analysis at six stations, revealed that bacterial communities are highly divergent and display lower phylogenetic diversity than the surface sediment; sub-surface communities respond to oil supplementation in microcosms with a significant reduction in biodiversity and a shift in composition; they retain high biodegradation capacities and host hydrocarbon (HC) degraders that were isolated and identified. HC-degrading Alfa, Gamma and Epsilon proteobacteria together with Clostridia and Archaea are a common feature of sub-surface communities. These assemblages show similarities with that of subsurface petroleum reservoirs also characterized by the presence of biodegraded and weathered oils where anaerobic or microaerophilic syntrophic HC metabolism has been proposed
Lingua originaleEnglish
pagine (da-a)396-406
Numero di pagine11
RivistaMarine Pollution Bulletin
Volume131
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science
  • Pollution

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