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Vol. 22 (2019 year), No. 1, DOI: 10.21443/1560-9278-2019-22-1

Ershov V. V., Isaeva L. G., Polikarpova N. V.
The content of heavy metals in atmospheric deposition in the Pasvik State Nature Reserve vicinity

The dynamics of the heavy metals composition in the atmospheric deposition of pine and birch biogeocenoses near the Pasvik Reserve has been estimated taking into account the influence of air pollution. The objects of study are two monitoring plots located in Betuletum herbosum and Pinetum fruticuloso-hylocomiosum westward the combine "Pechenganikel" (Murmansk region) being a powerful source of sulfur dioxide and heavy metal emissions. The studied period of observation on atmospheric precipitation in the form of snow is 5 years (2009–2013), in the form of rain – 3 years (2010–2012). The plots have been equipped with 8 snow collectors (6 – under the forest canopy, 2 – in the open area), in the form of rain – 23 rain collectors (20 – under the forest canopy and 3 in the open area). Snow and rainwater have being sampled every four weeks. The composition of heavy metals (Cu, Ni, Pb, Cd, Cr, Co) is determined by atomic absorption spectrophotometry. In pine and birch biogeocenoses, significant inter-biogeocenotic variability in the composition of atmospheric precipitation in the form of snow and rain has been revealed. The excess of critical loads in atmospheric deposition of copper, as well as the excess of the maximum permissible concentrations (MPS) for this metal in both types of forest, in the sediments passed through the canopy and in open areas have been revealed. For other metals, the situation looks more stable, in particular exceeding the MPS in fishery of the nickel content in atmospheric deposition has not been identified

(in Russian, стр.7, fig. 1, tables. 1, ref 11, Adobe PDF, Adobe PDF 0 Kb)

Vol. 24 (2021 year), No. 1, DOI: 10.21443/1560-9278-2021-24-1

Isaeva L. G., Sukhareva T. A.
Assessment of the green spaces' state in the impact zone of the Pechenganikel smelter, the Murmansk region

The study of the state of green spaces in urbanized areas is important due to their sanitary, hygienic and aesthetic role in the harsh climatic conditions of the Arctic. The objects of research were the green spaces of the urban-type settlement Nikel (the Murmansk region). The assessment of the distribution of tree and shrub species by categories of life state was carried out; revealed damage to leaves by atmospheric emissions, insects and fungi. A high degree of damage from pollution was noted in birch, mountain ash and bird cherry; aspen up to 85 % damaged by aphids; mechanical damage to the trunks was noted in about 26 % of the surveyed trees; 5 % of trees have frost cracks in the trunk. In the course of a comparative assessment of the chemical composition of birch leaves growing in the urbanized territory of Nikel and in forest ecosystems along the gradient of atmospheric pollution in the impact zone of the Pechenganikel plant, it was found that the concentrations of pollutants in birch leaves in technologically disturbed areas exceed background values. Birch leaves in the southern direction from the plant accumulate higher concentrations of Ni, Cu, Pb, Co, Fe than in the western and northern directions. In 2019, the concentrations of heavy metals in birch leaves increased compared to the previous study period (2004). In the urban area, the content of pollutants exceeds not only the values of the regional background, but also the levels identified in forest ecosystems along the gradient of atmospheric pollution. Concentration coefficients Cc show abnormally high values for Ni, Cu, Pb, Co, Fe; the maximum Cc values are noted for Ni and Co.

(in Russian, стр.9, fig. 3, tables. 6, ref 23, AdobePDF, AdobePDF 0 Kb)