Publications by authors named "O Ondrej Sebek"
We studied concentrations of 34 essential and non-essential elements in samples of edible Bay Bolete (Imleria badia) mushrooms added by samples of the growing substrate and bioavailable fraction. The samples were collected from six forested sites affected differently by industrial pollution and underlain by compositionally contrasting bedrock: granite, amphibolite, and peridotite. In all cases, mushrooms behaved as a bioconcentrating system for elements such as Ag, K, P, Rb, S, and Se (BCF > 1) being a bioexcluding system for the rest of the elements analyzed (BCF < 1).
View Article and Find Full Text PDFSizeable net export of base cations from a Carpathian flysch catchment indicates their geogenic origin while the Mg/Mg, Ca/Ca and Sr/Sr isotope ratios in runoff are indistinguishable from atmospheric input.
Environ Sci Pollut Res Int
April 2024
Article Synopsis
- Nutrient imbalances in forests, especially when combined with stressors like drought and bark beetles, can harm their health; this study focuses on the sources of essential minerals (Mg, Ca, Sr) in a Carpathian catchment area.
- *Using isotope composition analysis of various ecosystem compartments, researchers found that the annual export of these minerals significantly exceeded atmospheric inputs, indicating substantial leaching from local bedrock.
- *Interestingly, the isotope ratios of the runoff closely resembled those of atmospheric deposition and soil water, but differed from the bedrock, suggesting that the bedrock is not the main source of these minerals, potentially pointing to a mixing of different sources.*
We conducted a study of elemental compositions of Xerocomellus chrysenteron samples accompanied by samples of related substrate soils. All samples were collected during the harvesting seasons 2021 and 2022 from three forested sites almost unpolluted by recent human activities and underlain by contrasting bedrock (granite, amphibolite, and serpentinite). Elements such as Ag, Cd, K, P, Rb, S, Se, and Zn were the main elements enriched in the mushroom's fruiting bodies relative to the substrate.
View Article and Find Full Text PDFTransect sampling is an under-exploited tool in isotope studies of atmospheric pollution. Few studies have combined Zn and Pb isotope ratios to investigate whether atmospheric pollution at a receptor site is dominated by a different anthropogenic source of each of these toxic elements. It has been also unclear whether pollution abatement strategies in Central Europe have already resulted in regionally well-mixed background isotope signature of atmospheric Zn and Pb.
View Article and Find Full Text PDFArticle Synopsis
- Boletus edulis mushrooms effectively accumulate elements like Ag, Rb, Zn, and K, while showing lower accumulation of toxic elements such as As, Pb, and Cr.
- The mushrooms accumulate higher concentrations of Se and Cd than what is found in the surrounding substrate, indicating varied bioavailability of different elements.
- Within the fruiting body, different parts show distinct isotope fractionation, with upper sections generally accumulating heavier isotopes for Mg, Zn, and Cd, while Cu isotopes behave differently, showing a trend toward lighter forms in those areas.