Projects per year
Abstract
This study linked growth inhibition of soil bacteria and protists to the chemical activity (a) of polycyclic aromatic hydrocarbons (PAHs) and compared the sensitivities of bacteria and protists. Passive dosing from pre-loaded silicone provided well-defined and constant a of PAHs in independent tests. Single-species growth inhibition with two bacterial (Pseuodomonas fluorescens DR54 and Sinorhizobium meliloti) and two protist (Cercomonas longicauda and Acanthamoeba castellanii) strains at maximum a (amax) of nine and four PAHs, respectively, showed no inhibition of PAHs with amax below 0.1 (pyrene and anthracene), while growth inhibition was observed for PAHs with amax above 0.1 (e.g. fluorene, fluoranthene and naphthalene). The bacteria were less sensitive than the protists. Soil bacterial community-level growth inhibition by naphthalene was in good agreement with single-species data, but also indicated the presence of sensitive bacteria that were inhibited by a below 0.05 and increasing pre-exposure time giving higher inhibition. The a of 50% inhibition (Ea50) was 0.434 and 0.329 for 0.5 and 4 h pre-exposure time, respectively. Invertebrates tended to be more sensitive than single-celled organisms tested here. This suggests that PAH exposure leads to differential toxicity in soil biota, which may affect soil food web structure and cycling of organic matter.
Original language | English |
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Article number | fnz214 |
Journal | FEMS Microbiology Letters |
Volume | 366 |
Issue | 17 |
Number of pages | 8 |
ISSN | 0378-1097 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- bioavailability
- chemical activity
- PAH
- Protista
- Soil microorganisms
- toxicity
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Dive into the research topics of 'Soil bacteria and protists show different sensitivity to polycyclic aromatic hydrocarbons at controlled chemical activity'. Together they form a unique fingerprint.Projects
- 4 Finished
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Environmental contaminents
Winding, A. (Participant), Lassen, P. (Participant), Bester, K. (Participant), Thomsen, M. (Participant), Sanderson, H. (Participant), Ellegaard-Jensen, L. (Participant), Hansen, L. H. (Participant) & Bollmann, U. E. (Participant)
05/02/2016 → 05/02/2020
Project: Research
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SGA for Circular Resource Flows
Thomsen, M. (Project manager), Pedersen, A. B. (Participant), Johansen, A. (Participant), Winding, A. (Participant), Hasler, B. (Participant), Jacobsen, C. S. (Participant), Caro, D. (Participant), Nainggolan, D. (Participant), Jacobsen, J. (Participant), Bester, K. (Participant), Petersen, L. K. (Participant), Zandersen, M. (Participant), Hendriksen, N. B. (Participant), Cong, R. (Participant), Nielsen, H. Ø. (Participant), Brandt, J. (Participant), Andersen, M. S. (Participant), Klinglmair, M. (Participant), Romeo, D. (Participant), Osei-Owusu, A. K. (Participant), Zhang, X. (Participant), Teigiserova, D. (Participant), Marini, M. (Participant), Angouria-Tsorochidou, E. (Participant) & Christensen, L. D. (Participant)
05/02/2016 → 05/02/2020
Project: Research
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SGA for Removal of Environmental Pollutants by Biological Processes
Bester, K. (Project manager), Ellegaard-Jensen, L. (Project coordinator), Johansen, A. (Participant), Winding, A. (Participant), Hasler, B. (Participant), Jacobsen, C. S. (Participant), Jacobsen, J. (Participant), Hansen, L. H. (Participant), Thomsen, M. (Participant), Hendriksen, N. B. (Participant), Lassen, P. (Participant), Bollmann, U. E. (Participant), Gosewinkel, U. B. (Participant) & Carvalho, P. (Participant)
05/02/2016 → 05/02/2020
Project: Research