title: Biodegradation of phenanthrene by indigenous microorganisms in soils from Livingstone Island, Antarctica.
abstract: Biodegradation of polycyclic aromatic hydrocarbons (PAHs) in soils has been linked to history of exposure to PAHs and prevailing environmental conditions. This work assessed the capacity of indigenous microorganisms in soils collected in Livingstone Island (South Shetlands Islands, Antarctica) with no history of pollution (∑PAHs: 0.14-1.47 ng g(-1)  dw) to degrade (14) C-phenanhthrene at 4, 12 and 22 °C. The study provides evidence of the presence of phenanthrene-degrading microorganisms in all studied soils. Generally, the percentage of (14) C-phenanhthrene mineralized increased with increasing temperature. The highest extent of (14) C-phenanhthrene mineralization (47.93%) was observed in the slurried system at 22 °C. This work supports findings of the presence of PAH-degrading microorganisms in uncontaminated soils and suggests the case is the same for uncontaminated Antarctic remote soils.
authors.affiliation: Lancaster Environment Centre, Lancaster University, Lancaster, UK.
authors.forename: Uchechukwu V
authors.initials: UV
authors.lastname: Okere
authors.forename: Ana
authors.initials: A
authors.lastname: Cabrerizo
authors.forename: Jordi
authors.initials: J
authors.lastname: Dachs
authors.forename: Kevin C
authors.initials: KC
authors.lastname: Jones
authors.forename: Kirk T
authors.initials: KT
authors.lastname: Semple
mesh_terms: D000864:Antarctic Regions; D001419:Bacteria / Q000378:metabolism*; D058491:Bacterial Load; D001711:Biotransformation; D002250:Carbon Radioisotopes / Q000378:metabolism; D007553:Isotope Labeling; D010616:Phenanthrenes / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*; D013696:Temperature
chemical_list: D002250:Carbon Radioisotopes; D010616:Phenanthrenes; D012989:Soil Pollutants; C031181:phenanthrene