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Effects of soil moisture and nickel contamination on microbial respiration rates in heavy metal-polluted soils

100%

Morawska-Ploskonka J., Niklinska M.

Polish Journal of Environmental Studies

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2013

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tom 22

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nr 5

Soil microorganisms may be both sensitive and resilient to various disturbances. The effects of a single stressor on soil microorganisms have been well studied, but only limited research has been carried out to test the effects of simultaneous action of diverse stressors. Soil samples were collected from a long-term polluted zinc and lead site and an unpolluted site. Modeling studies assumed spiking soils with five different concentrations of nickel (400, 800, 1.600, 3.200, and 6.400 mg Ni·kg⁻¹ dry weight soil) and their incubation under different humidity conditions (10%, 75%, and 120% of water holding capacity). We wanted to test if additional environmental disturbances have a different effect on microorganisms from polluted and unpolluted soils. The study showed that after 30 and 120 days of incubation, increasing Ni pollution inhibited microbial respiration rate (R), both in unpolluted and long-term metal polluted soils, irrespective of soil moisture. After 30 days of the experiment, microbial communities in both soils demonstrated a similar response to the additional toxicant. However, after 120 days of exposure to Ni, microbial communities from the unpolluted soil showed much higher inhibition of R than microbes from the polluted soils (p<0.001). The results might suggest that Ni co-tolerance mechanisms occurred in long-term metal polluted microbial communities.

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Nickel content in the coat of cats depending on their keeping conditions

80%

Kosla T., Skibniewska E., Skibniewski M.

Bulletin of the Veterinary Institute in Puławy

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2011

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tom 55

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nr 1

The investigations aimed at the assessment of nickel contamination of the environment based on the content of this element in the coat of domestic and feral cats. The content of nickel in the coat was determined using the method ICP-OES. While assessing the state of nickel supply, a trial was undertaken at checking whether the increase in nickel content in the animal organism affects biological and haematological indexes of the animal. Blood plasma alkaline phosphatase, and alanine and aspartate aminotransferase (transaminase) activities, and haematological parameters were analysed. Then, the correlations between those indexes and the nickel content in cats' hair depending on cats' keeping (feral and domestic cats) and their sex were calculated. No statistically significant differences were noted depending on the cats living conditions. The obtained mean value of nickel content in the coat could be accepted as normal for cats. In the case of nickel, the differences depending on sex and age were also not significant statistically. The assessment of statistical indexes shows that median, similarly as lower quartile, are identical for the nickel content in the cats from both groups (0.40 mg·kg⁻¹) independently from their sex and age. Analysis of nickel content depending on hair colour was also performed assuming that the colour depends on the saturation of hair with melanin. The lowest nickel content was observed in white hair, higher in tortoiseshell hair and black hair, and the highest in the feral colour - brownish grey. The results confirmed the fact that the content of nickel depends on the hair saturation with melanin.

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Wpływ wapnowania oraz stosowania materiałów organicznych na zawartość miedzi i cynku w kupkówce pospolitej (Dactylis glomerata L.) uprawianej na glebie zanieczyszczonej niklem

80%

Acta Agrophysica

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2017

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tom 24

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nr 2

W doświadczeniu wazonowym badano wpływ wapnowania i stosowania materiałów organicznych – słomy i węgla brunatnego na zawartość miedzi oraz cynku w kupkówce pospolitej (Dactylis glomerata L.) uprawianej na glebie w różnym stopniu zanieczyszczonej niklem. Analizowano rośliny czterech pokosów trawy zebrane w trzecim roku doświadczenia. Wapnowanie powodowało istotne zmniejszenie zawartości miedzi w roślinie testowej, nie różnicując jednoznacznie zawartości cynku. W przeprowadzonych badaniach nie wykazano istotnego wpływu zróżnicowanej ilości niklu w glebie na zawartość cynku w kupkówce pospolitej, natomiast wraz ze wzrostem stopnia zanieczyszczenia gleby niklem, zawartość miedzi w trawie uległa zmniejszeniu, co świadczyć może o antagonizmie obu mikroelementów.

Ograniczanie wyników

1 Acta Agrophysica

1 Bulletin of the Veterinary Institute in Puławy

1 Polish Journal of Environmental Studies

1 Kosla T.

1 Morawska-Ploskonka J.

1 Niklinska M.

1 Skibniewska E.

1 Skibniewski M.

1 2017

1 2013

1 2011

Effects of soil moisture and nickel contamination on microbial respiration rates in heavy metal-polluted soils

Nickel content in the coat of cats depending on their keeping conditions

Wpływ wapnowania oraz stosowania materiałów organicznych na zawartość miedzi i cynku w kupkówce pospolitej (Dactylis glomerata L.) uprawianej na glebie zanieczyszczonej niklem