Activity of nitrifying populations in grassland soil polluted by polychlorinated biphenyls (PCBs)

Dušek, Ladislav

doi:10.1007/bf00011791

Cited by 7 publications

(6 citation statements)

References 25 publications

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“…The toxic effect of PCBs in soil could be due to oxidation products that could occur particularly in mixtures formed during incineration of various materials containing PCBs [15]. In three year study, Dusek and Tesarová [10] observed significant decline in MB-C content and respiration activity in soil contaminated only by 14.4 ng-g" 1 PCBs originated from municipal waste incinerator. From that viewpoint, it appears to be important that the lowest stability of microbial biomass and mineralization capability were detected in the soil T contaminated by mixture with the highest I-TEQ (2378-TCDD) for PCBs congeners (8.4 pg-g" 1 ).…”

Section: Resultsmentioning

confidence: 97%

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Microbial biomass and its mineralization activity in a comparative study of five anthropogenic grassland soils contaminated by persistent organic pollutants

Škoda

Dušek

Holoubek

1998

Toxicological & Environmental Chemistry

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This study surveyed microbial biomass and its mineralization activity in five anthropogenic grasslands typically contaminated by persistent organic pollutants (polychlorinated biphenyls -PCBs, polycyclic aromatic hydrocarbons -PAHs, DDT). Toxic equivalent (I-TEQ 2378-TCDD; pg•g -1 ) of PCBs congeners decreased in the following order: site T (8.40) > site P (3.10) > site M (1.1) > site PZ (0.92) > site K (0.05). Site M was the only one with increased level of polychlorinated phenols (23.80 μg•g -1 ). Following parameters of stressed microbial communities were evaluated: microbial biomass carbon (MB-C), respiration rate (RR), potential (glucosestimulated) respiration rate (PR), biomass specific respiration activity (qCO 2 ) and long-term glucose uptake incubation experiments where mineralization kinetics is studied simultaneously with the evaluation of MB-C. Estimates of MB-C provided very suitable basis for the evaluation of mineralization capacity. Although the soils were not fully distinguished only on the basis of short-term estimations of RR and PR values, the ratio RR/PR appeared to reflect relatively low capacity of microflora in heavily polluted soils to utilize sufficient amount of available organic matter naturally present in the sites. Significant decline of MB-C content during laboratory incubations without substrate addition also proved low mineralization capacity of soils PZ, P, and particularly of soil T, while soil K was able to maintain present microbial biomass and relatively high mineralization activity. In all the soils, the addition of glucose significantly increased MB-C content and newly synthesized biomass at the end of incubation could be arranged in the following order: K > M > P > PZ > T. Sufficient mineralization capacity and sustainability of microbial biomass was therefore observed in the site K that was not highly polluted by PCBs and DDT. Microflora in the other soils appeared to be limited in mineralization capacity and in * Corresponding author † Ladislav Dušek, Ph. D., 113 Downloaded by [UZH Hauptbibliothek / Zentralbibliothek Zürich] at 07:33 23 December 2014 114 M. SKODA et ai.conversion efficiency of substrate C to biomass C which appeared to be caused mainly by bacteriostatic effect of PCBs.

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Section: Resultsmentioning

confidence: 97%

“…Laboratory incubations of soil samples were arranged according to Dusek and Tesafová [10]. Composite soil samples (10 g per one replicate) were amended with 2 ml of glucose water solution provided saturating amount of glucose: 5000 ug C g" 1 dry soil (0.5%).…”

Section: Microbiological Analysesmentioning

confidence: 99%

Microbial biomass and its mineralization activity in a comparative study of five anthropogenic grassland soils contaminated by persistent organic pollutants

Škoda

Dušek

Holoubek

1998

Toxicological & Environmental Chemistry

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“…Dusek (1995) in experiments with increasing dozes of РСРs found a strong decrease of the nitrite-oxidizing bacteria.…”

Section: The Impact Of the Main Soil Pollutants On Soil Microfloramentioning

confidence: 89%

Soil Chemical Pollution, Risk Assessment, Remediation and Security

Simeonov¹,

Sargsyan²

2008

NATO Science for Peace and Security Series C: Environmental Security

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Plant ecophysiology Effects of pollutants (ozone, UV-B, metals, acidic deposition, and surfactants)and climate change (drought, frost) on forests and trees (gas exchange, water relations, cuticles, roots, ectomycorrhizas, growth and pollen) biomonitoring, moss biomonitoring, raptor biomonitoring, heavy metal contamination, cellular localization of metals, hydrological fluxes of forest canopies. expertise in sustainable development, particularly in the following areas: environmental services, ecology and biogeochemistry of ecosystems and agroecosystems, bioenergy, biofuels, biochar, remote sensing, and electron microscopy applied to nanotechnology, electronics and automation, climate change adaptation and mitigation of greenhouse gases emissions.

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“…For nitrification, which is the second step in the mineralization of nitrogen from organic matter, so far studies of the effects on metals of this process have not produced a consistent picture. Dusek [82] found that Cd disrupted nitrification in spiked soils; however, high concentrations (100 and 500 mg Cd kg À1 ) were required, suggesting that the function had low sensitivity. Murray et al [83], in contrast, found no effect of Cd, Cu, Ni and Pb, while Kandeler et al [84] found that nitrification was influenced more by the supply of organic substrate in sludge than by the heavy metal content.…”

Section: Populations and Communitiesmentioning

confidence: 99%

Trace Metal Exposure and Effects on Soil‐Dwelling Species and Their Communities

Spurgeon

2010

Trace Elements in Soils

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Activity of nitrifying populations in grassland soil polluted by polychlorinated biphenyls (PCBs)

Cited by 7 publications

References 25 publications

Microbial biomass and its mineralization activity in a comparative study of five anthropogenic grassland soils contaminated by persistent organic pollutants

Microbial biomass and its mineralization activity in a comparative study of five anthropogenic grassland soils contaminated by persistent organic pollutants

Soil Chemical Pollution, Risk Assessment, Remediation and Security

Trace Metal Exposure and Effects on Soil‐Dwelling Species and Their Communities

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