Group variability of the morphological features of the leaf of <i>Betula pendula</i> Roth (Betulaceae, Magnoliópsida) in the gradient of weather conditions and technogenic soil transformation

The group variability of morphological features the leaves Betula pendula Roth was studied in gradients adverse weather conditions and technogenic soil transformation. studies were carried out on territory Tagil zone Middle Urals 2016–2019. It has been revealed that most leaf traits have an average level variation, while a high one is characteristic shape index, low blade index angles between main lateral vein first order, located middle upper parts leaf. In gradient deterioration conditions, increases, whilst it decreases making greatest contribution to size identified by method principal component analysis. Leaf mainly determined dimensional features. Allometric are more stable. To assess resistance organism factors, proposed use stability coefficient, which reflects number trait transitions from another one. This indicator increases both transformation unfavorable weather.