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The short-term effects of crude oil on the survival of different size-classes of cladoceran Daphnia magna (Straus, 1820)

100%

Lennuk L., Kotta J., Taits K., Teeveer K.

Oceanologia

2015

tom 57

nr 1

Short-term effects of ambient air pollution on daily mortality

84%

Kowalska M., Zejda J. E., Skrzypek M.

Polish Journal of Environmental Studies

2010

tom 19

nr 1

101-105

In environmental epidemiology, short-term effects of ambient air pollution on mortality are explored using time-series analysis including various definitions of the exposure variable. In order to find out if and to what extent the magnitude of air pollution-related relative risk of death depends on the definition of the exposure variable, we analyzed data on daily mortality and air pollution concentrations obtained in the city of Katowice in 2001-02 (range of daily number of deaths: 17-76; range of 24-hour concentrations in μg/m³: PM₁₀ = 11.2-421.3, SO₂ = 10.5-239.8, NOₓ = 15.7-287.7). The modeling results confirmed the dominant role of SO₂ among the monitored ambient air pollutants, after adjustment for meteorological variables. The value of SO₂- related relative risk of death (total mortality) depended on the definition of exposure variable – for same-day concentrations of SO₂ it was 1.007, and for a three-day moving average it was 1.012. The largest values of risk estimates were provided by exposure variables expressed as a 40-day moving average (SO2-related relative risk = 1.022). Our findings highlight the importance of the choice of the model (including definition of exposure variables) in exploring time-series mortality data. On biological grounds our findings suggest that people at risk of death (i.e. elderly with cardiorespiratory disorders) could be more affected by an accumulating burden of exposure (expressed by average air pollution levels over a longer period) than by acute exposures to increasing air pollution levels.

Short-term effects of prescribed forest fire on soil mites [Acari]

84%

Grabczynska O., Olejniczak I., Predecka A., Russel S.

Polish Journal of Ecology

2009

tom 57

nr 4

805-809

Natural forest fires are considered as a part of natural ecosystem processes. Short-term effects of prescribed fire on densities and taxonomic diversity of soil Acari were studied in fresh pine mixed forest (“Biala” forest ) in the Mazovia region, Central-Eastern Poland. Three plots (size 1 m²) of similar soil type and vegetation were selected for prescribed burning. Soil samples of an area of 10 cm² and the depth of 5 cm were collected in June 2005 – one day after the burning, 60 days after the burning and 90 days after the burning. Samples were collected from within the border of the burned plots, from the border itself, as well as from the surroundings. Due to the burning, the density of Acari communities decreased from 11.5 × 10³ ind. m⁻² recorded in the surroundings to 3.2 × 10³ ind. m⁻² recorded in the burned plots. Values recorded within the burned plots after the fire differed significantly from those recorded on the border (P = 0.05) and in the surroundings (P = 0.0001). After 60 days, an increase in Acari abundance was observed in the burned plots (P = 0.02), becoming similar to that noted for the border of the plot and for the surroundings. After 90 days, there were no significant differences between the burned parts of the plots, their borders and the surroundings; however, generally decreased densities were observed, possibly due to the seasonal reason. The observed changes suggest the restoration of Acari community after disturbance.

Ograniczanie wyników

1 Oceanologia

1 Polish Journal of Ecology

1 Polish Journal of Environmental Studies

1 Grabczynska O.

1 Kotta J.

1 Kowalska M.

1 Lennuk L.

1 Olejniczak I.

1 Predecka A.

1 Russel S.

1 Skrzypek M.

1 Taits K.

1 Teeveer K.

1 Zejda J. E.

1 2015

1 2010

1 2009

Wyniki wyszukiwania

The short-term effects of crude oil on the survival of different size-classes of cladoceran Daphnia magna (Straus, 1820)

Short-term effects of ambient air pollution on daily mortality

Short-term effects of prescribed forest fire on soil mites [Acari]