The degradation of resistant organic substances in aquatic ecosystems as affected by microorganisms

About the authors:

Mauliha S. Sharafutdinova, Рostgraduate student, Tyumen State University
Boris S. Kharitontsev, Dr. Sci. (Biol.), Senior Researcher, Tobolsk Complex Scientific Station of the Ural Branch of the Russian Academy of Sciences; xaritoncev52@mail.ru

Abstract:

The features of leaf fluctuating asymmetry of Tilia cordata L. in natural areas of growth in the conditions of the south of the Tyumen region are observed. Features of distribution of quantitative measurements of five shapes of the leaf were studied using the skewness As and Ex. The directed and non-directed asymmetry signs were studied using Wilcoxon test. Spearman’s correlation analysis determined the ratio of the asymmetry feature (L-R) concerning the size of the shape on both sides (L-R/2). Analysis of the variability of traits of the leaf blade was conducted. The analysis of five measurements revealed a high degree of closeness between these results, and the same type of samples within a population, but it is much different between populations. Fluctuating asymmetry of the leaves T. cordata L. in the three areas of research (Vagaysky district, Tobolsk, Yarkovskiy district) correspond to those identified in natural populations in the absence of apparent negative factors (eg. in specially protected areas).

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