Microbial responses to polycyclic aromatic hydrocarbon contamination in temporary river sediments: Experimental insights
| Autor: | Silvio Capri, Nicoletta Ademollo, Luisa Patrolecco, Annamaria Zoppini, Juergen Marxsen, Patrizia Casella, Stefano Amalfitano, Stefano Fazi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Environmental Engineering Amendment Polycyclic aromatic hydrocarbon microbial communities 010501 environmental sciences 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Rivers Respiration Environmental Chemistry Biomass Polycyclic Aromatic Hydrocarbons Waste Management and Disposal 0105 earth and related environmental sciences Trophic level chemistry.chemical_classification Chemistry Aquatic ecosystem sediments 15. Life on land Phenanthrene Pollution microbial processes 6. Clean water 030104 developmental biology Microbial population biology 13. Climate action Environmental chemistry polyciclic aromatic hydrocarbon PAH temporary rivers Microcosm Water Microbiology Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Science of the total environment 541 (2016): 1364–1371. doi:10.1016/j.scitotenv.2015.09.144 0048-9697 info:cnr-pdr/source/autori:Annamaria Zoppini; Nicoletta Ademollo; Stefano Amalfitano; Silvio Capri; Patrizia Casella; Stefano Fazi;Juergen Marxsen; Luisa Patrolecco/titolo:Microbial responses to polycyclic aromatic hydrocarbon contamination in temporary river sediments: Experimental insights/doi:10.1016%2Fj.scitotenv.2015.09.144 0048-9697/rivista:Science of the total environment/anno:2016/pagina_da:1364/pagina_a:1371/intervallo_pagine:1364–1371/volume:541 |
| DOI: | 10.1016/j.scitotenv.2015.09.144 |
| Popis: | Temporary rivers are characterized by dry-wet phases and represent an important water resource in semi-arid regions worldwide. The fate and effect of contaminants have not been firmly established in temporary rivers such as in other aquatic environments. In this study, we assessed the effects of sediment amendment with Polycyclic Aromatic Hydrocarbons (PAHs) on benthic microbial communities. Experimental microcosms containing natural (Control) and amended sediments (2 and 20 mg PAHs kg(-1) were incubated for 28 days. The PAH concentrations in sediments were monitored weekly together with microbial community structural (biomass and phylogenetic composition by TGGE and CARD-FISH) and functional parameters (ATP concentration, community respiration rate, bacterial carbon production rate, extracellular enzyme activities). The concentration of the PAH isomers did not change significantly with the exception of phenanthrene. No changes were observed in the TGGE profiles, whereas the occurrence of Alpha- and Beta-Proteobacteria was significantly affected by the treatments. In the amended sediments, the rates of carbon production were stimulated together with aminopeptidase enzyme activity. The community respiration rates showed values significantly lower than the Control after 1 day from the amendment then recovering the Control values during the incubation. A negative trend between the respiration rates and ATP concentration was observed only in the amended sediments. This result indicates a potential toxic effect on the oxidative phosphorylation processes. The impoverishment of the energetic resources that follows the PAH impact may act as a domino on the flux of energy from prokaryotes to the upper level of the trophic chain, with the potential to alter the temporary river functioning. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|