The chemical composition of atmospheric precipitation, throughfall and surface waters in the middle taiga deciduous stands of post-cutting origin
Т.А. Pristova
Section: Chemistry of natural environments and objects
The chemical composition of atmospheric precipitation (rainfall), throughfall and surface (stream) waters are studied. The studies were conducted in the Knyazhpogost district of the Komi Republic (62̊18’ N 50̊55’ E). Studies were conducted on the terrain in which from 1970 to the 1990. spruce forests were cut down and now represented by deciduous and deciduous-coniferous forest of different ages, which are formed after natural reforestation. Water samples were taken monthly at constant points for 2 years: in a stream, atmospheric precipitation (rainfall), throughfall the crowns of birch, aspen, spruce and between crowns in 10-15 replicates. The chemical composition of the waters is transformed in the series: atmospheric precipitation (rainfall) – throughfall – stream. It is established that when throughfall the crowns of trees, the content of most components of the chemical composition of atmospheric precipitation increases. The chemical composition of the throughfall is affected by the age and tree composition of the stand. The studied natural waters are slightly acidic, low salinity, hydrocarbonate class and differ in hydrochemical type. A series of decreasing ion concentrations in atmospheric precipitation: HCO3->SO42->K+>Ca2+>Cl-, throughfall of birch-spruce young forest: HCO3->K+>Ca2+>SO42->Cl-, throughfall aspen-birch stand: HCO3->K+>Ca2+>PO42->Cl-, in the stream waters: HCO3->Ca2+>Mg2+>K+>Cl-. As the mineralization increases, the studied waters are arranged in a row: atmospheric precipitation (rainfall) < throughfall of birch-spruce young forest < throughfall of aspen-birch stand
Keywords: middle taiga zone, deciduous forests, chemical composition of precipitation and water stream
Article published in number 2 for 2022 DOI: 10.25750/1995-4301-2022-2-063-069
ISSN 1995-4301
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