In this study, the indigenous microbial mineralisation of 14C-phenanthrene in seven background soils (four Norwegian woodland and three UK (two grassland and one woodland)) was investigated. ∑PAHs ranged from 16.39 – 285.54 ng g-1 dw soil. Lag phases (time before 14C-phenanthrene mineralisation reached 5%) were longer in all of the Norwegian soils and correlated positively with TOC, but negatively with ∑PAHs and phenanthrene degraders for all soils. Phenanthrene mineralisation in the soils varied due to physic-chemical properties. Results show that indigenous microorganisms can adapt to 14C-phenanthrene mineralisation following diffuse PAH contamination. Considering the potential of soil as a secondary PAH source, these findings highlight the important role of indigenous microflora in the processing of PAHs in the environment.

中文翻译：

---

挪威和英国的“原始”林地和草地土壤中的土著14C菲生物降解

在这项研究中，调查了在七个背景土壤（四个挪威林地和三个英国（两个草原和一个林地））中14C菲的土著微生物矿化作用。∑PAHs范围从16.39 – 285.54 ng g-1 dw土壤。在所有挪威土壤中，滞后阶段（14C菲矿化达到5％之前的时间）更长，并且与TOC呈正相关，但在所有土壤中与∑PAHs和菲降解物呈负相关。土壤中的菲矿化因物理化学性质而异。结果表明，在扩散的PAH污染后，本地微生物可以适应14C菲的矿化作用。考虑到土壤作为次生PAH来源的潜力，这些发现凸显了本地微生物区系在环境中PAHs加工中的重要作用。