Microbial communities of polluted sub-surface marine sediments

MARINE POLLUTION BULLETIN

卷:131

Article

Catania, Valentina¹  Cappello, Simone²  Di Giorgi, Vincenzo¹  Santisi, Santina²  Di Maria, Roberta¹  Mazzola, Antonio^3,4  Vizzini, Salvatrice^3,4  Quatrini, Paola¹ 

[1] Univ Palermo, Dept Biol Chem & Pharmaceut Sci & Technol STEBICE, Palermo, Italy

[2] CNR Messina, Inst Coastal Marine Environm IAMC, Messina, Italy

[3] Univ Palermo, Dept Earth & Marine Sci DISTEM, Palermo, Italy

[4] Consorzio Nazl Interuniv Sci Mare CoNISMa, Rome, Italy

关键词: Sub-surface marine sediments;    Microbial communities;    alkB genes;    Unresolved complex mixtures (UCM);    Mediterranean Sea;    Biodegradation;    Arcobacter;   

DOI  :  10.1016/j.marpolbul.2018.04.015

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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