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Analysis of phthalate presence in agricultural soils in the Czech Republic

100%

Dankova R., Jarosova A., Polakova S.

Polish Journal of Environmental Studies

2016

tom 25

nr 1

Our study monitored two phthalic acid esters in agricultural soils in the Czech Republic: di2ethylhexyl phthalate (DEHP) and dibutyl phthalate (DBP). The concentration levels were determined using high-performance liquid chromatography with UV detection. The samples were extracted using an acetone-hexane (1:1) mixture. Phthalate content monitoring was performed in 12 administrative regions of the Czech Republic. Soil was sampled from the upper soil horizon along the polyline, with samples taken from the following cultures: arable land, permanent grassland, a hop field, and unfarmed land. The phthalic acid ester concentrations found ranged from 0.01 to 2.48 mg per kg of DM wt for dibutyl phthalate and from 0.05 to 1.43 mg per kg of DM wt for di2ethylhexyl phthalate. The total concentration of both phthalates ranged from 0.21 to 3.47 mg per kg of DM wt.

Relation between body-size and thermoregulation behavior: postprandial thermophily in spiny-tailed agama Uromastyx acanthinura Bell

100%

Berec M., Stara Z., Polakova S.

Polish Journal of Ecology

2014

tom 62

nr 1

Ectothermal vertebrates regulate their body temperature within definite limits to maintain physiological processes at their optimal levels. Among others, food processing and absorption are strongly temperature-dependent. Deficiency of adequate temperatures limits ectotherms in growth and maintenance. On the other hand, thermoregulatory behavior is costly and should be constrained by many factors. Using artificial thermal gradients (26–44℃ ), we measured temperature preferences of 10 spiny-tailed agamas (Uromastyx acanthinura) in controlled indoor experiment. Each lizard could choose place in the terrarium before and after feeding. Then, temperature preferences during pre-feeding and post-feeding periods were compared. We found significant increase of preferred temperature after feeding. Detailed view revealed that there is consistent influence of body size: bigger lizards maintained higher temperature during the whole experiment. We hypothesize that bigger potential predation risk on smaller lizards due to their size would force them to choose less optimal conditions.

Ograniczanie wyników

1 Polish Journal of Ecology

1 Polish Journal of Environmental Studies

2 Polakova S.

1 Berec M.

1 Dankova R.

1 Jarosova A.

1 Stara Z.

1 2016

1 2014

Wyniki wyszukiwania

Analysis of phthalate presence in agricultural soils in the Czech Republic

Relation between body-size and thermoregulation behavior: postprandial thermophily in spiny-tailed agama Uromastyx acanthinura Bell