World Journal of Microbiology and Biotechnology

, Volume 29, Issue 11, pp 1989–2002 | Cite as

Remarkable impact of PAHs and TPHs on the richness and diversity of bacterial species in surface soils exposed to long-term hydrocarbon pollution

  • Tibor Benedek
  • Balázs Vajna
  • András Táncsics
  • Károly Márialigeti
  • Szabolcs Lányi
  • István Máthé
Original Paper

Abstract

Nowadays, because of substantial use of petroleum-derived fuels the number and extension of hydrocarbon polluted terrestrial ecosystems is in growth worldwide. In remediation of aforementioned sites bioremediation still tends to be an innovative, environmentally attractive technology. Although huge amount of information is available concerning the hydrocarbon degradation potential of cultivable hydrocarbonoclastic bacteria little is known about the in situ long-term effects of petroleum derived compounds on the structure of soil microbiota. Therefore, in this study our aim was to determine the long-term impact of total petroleum hydrocarbons (TPHs), volatile petroleum hydrocarbons (VPHs), total alkyl benzenes (TABs) as well as of polycyclic aromatic hydrocarbons (PAHs) on the structure of bacterial communities of four different contaminated soil samples. Our results indicated that a very high amount of TPH affected positively the diversity of hydrocarbonoclastic bacteria. This finding was supported by the occurrence of representatives of the α-, β-, γ-Proteobacteria, Actinobacteria, Flavobacteriia and Bacilli classes. High concentration of VPHs and TABs contributed to the predominance of actinobacterial isolates. In PAH impacted samples the concentration of PAHs negatively correlated with the diversity of bacterial species. Heavily PAH polluted soil samples were mainly inhabited by the representatives of the β-, γ-Proteobacteria (overwhelming dominance of Pseudomonas sp.) and Actinobacteria.

Keywords

PAHs TPHs Bacterial diversity Canonical correspondence analysis PCA T-RFLP 

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Tibor Benedek
    • 1
    • 3
  • Balázs Vajna
    • 2
  • András Táncsics
    • 3
  • Károly Márialigeti
    • 2
  • Szabolcs Lányi
    • 4
  • István Máthé
    • 4
  1. 1.Department of Analytical Chemistry and Environmental EngineeringPolytehnical University of BucharestBucharestRomania
  2. 2.Department of MicrobiologyEötvös Loránd UniversityBudapestHungary
  3. 3.Regional University Center of Excellence in Environmental IndustrySzent István UniversityGödöllőHungary
  4. 4.Bioengineering DepartmentSapientia Hungarian University of TransylvaniaMiercurea CiucRomania

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