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

Tyumen State University Herald. Natural Resource Use and Ecology


2015, Vol. 1. №2(2)

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;


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).


1. Gelashvili, D. B., Chuprunov, E. V., Iudin, D. I. Structural and informational indices of fluctuating asymmetry in bilaterally symmetric organisms // Journal of General Biology. 2004. Vol. 65. № 4 (in Russian).

2. Zakharov, V. M. Animals Asymmetry. Moscow: Nauka, 1987. 216 р. (in Russian).

3. Zakharov, V. M., Chubinishvili, A. T., Dmitriev, S. G. et al. Environmental Health: Practical Aspects of Assessment. Moscow: Tsentr ekologicheskoi politiki Rossii [Center of Russian Environmental Policy], 2000. 318 p. (in Russian).

4. Kozhara, A. V. The structure of the index of fluctuating asymmetry and its efficiency in population research // Biological Sciences. 1985. № 6. Pр. 100-103. (in Russian).

5. Lakin, G. F. Biometry: A guide for students of biology in higher educational institutions / 4th ed., rev. and extended. Moscow: Vysshaia shkola, 1990. 352 p. (in Russian).

6. Mamaev, S. A. Forms of Intraspecific Variation of Woody Plants (by the example of the family Pinaceae in the Urals). Moscow: Nauka, 1973. 282 p. (in Russian).

7. Melehova, O. P., Egorova, E. I., Evseeva, T. I. Biological Control of the Environment: Bioindication and Biotesting. Moscow: Publishing Center “Academia”, 2007. 288 p. (in Russian).

8. Guidelines to the Implementation of Environmental Quality Assessment on the basis of Living Organisms (Evaluation of the Stability of Development of Living Organisms by Asymmetry of Morphological Structures): Order of Rosecology dated 16 October 2003. № 460. 28 p. (in Russian).

9. Savintseva, L. S., Egoshina, T. L., Shiryaev, V. V. Assessment of the quality of the urban environment in Kirov based on the analysis of fluctuating asymmetry of the leaf blade of the silver birch (Betula pendula roth) // Bulletin of Udmurt University, 2012. Issue 2. Рp. 31-37. (in Russian).

10. Huzina, G. R. Characteristics of fluctuating asymmetry of bilateral features of leaf of the linden (Tilia cordata L.) // Bulletin of Udmurt Uni-versity, 2011. Issue 3. Рp. 47-52. (in Russian).

11. Palmer, A. R., Strobeck, C. Fluctuating Asymmetry: Measurement, Analysis, Patterns // Annual Review of Ecology, Evolution, and Systematics. 1986. № 17. Рр. 391-421.