Cartographic assessment of pollution of forest ecosystems on the Baikal natural territory by technogenic emissions

Михайлова, Т. А.; Pleshanov, A. S.; Afanasieva, L. V.

doi:10.1016/j.gnr.2008.10.015

Cited by 9 publications

(1 citation statement)

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“…In addition to natural stress factors, boreal forests are subjected to increasing anthropogenic stresses (Volney and Fleming 2000;Selikhovkin et al 2018;Walker et al 2019;Shestakov et al 2020;Liu et al 2022). The most signi cant of them include the impact of technogenic emissions from various industrial enterprises (Aamlid and Venn 1993;Alexeyev 1995;Gytarsky et al 1995;Tømmervik et al 2003;Mikhailova et al 2008). The negative impact of aluminum smelter emissions on boreal forests in Russia and other countries has been studied for a long time (Vike and Hbjorg 1995;Vike 1999;Kalugina et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Anatomical and morphological changes in Pinus sylvestris and Larix sibirica needles under impact of emissions from a large aluminum enterprise

Kalugina,

Afanasyeva,

Mikhailova

2024

Ecotoxicology

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Species-speci c anatomical and morphological changes of Scots pine and Siberian larch needles were studied at different levels pollution by aluminum smelter emissions. Anatomical parameters were found to change nonlinearly in polluted needles as a result of pathological exposure to pollutants. In pine, negative anatomical changes include the following: reduction of the cross-sectional area of needles, central cylinder and conductive bundles, reduction of the thickness of the external tissues and mesophyll, reduction of resin channels and a decrease in their diameter. At a critical level of pollution, when the content of pollutants in pine needles reaches maximum values, certain changes in anatomical parameters in the remaining green needles are presumably adaptive. In larch needles at low, moderate and high levels of needles pollution, the anatomical changes found can be classed as adaptive -this is an increase in needles mass, thickness and width, thickness of the epidermis, mesophyll, cross-sectional area of needles. Larch needles, even at a critical pollution level, show no signi cant anatomical abnormalities. Negative morphological changes of pine include a decrease in the size of needles and shoots, their mass and the number of needles on shoots, in larch -a decrease in the length of needles and shoots, the number of brachiblasts. The results obtained suggest that indicators of the development of pathological processes in both pine and larch exposed to pollution are changes in the number of visual and morphological parameters of tree needles and shoots. Both showed a high level of correlation with the content of pollutants in the needles.

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