Özet:

River macroinvertebrate communities are distinguished by significant seasonal and interannual dynamics associated with variability of biotic and abiotic factors of their formation. Seasonal changes in composition and structure of bottom communities can have a significant impact on bioindication results because just these indicators are used in calculations of most biotic indices. The purpose of the study is to evaluate seasonal variability of biotic indices in the background section of Breksa River. In 2006-2009, macroinvertebrates were collected every month from April to October. To assess seasonal variability, we calculated biotic indices, which are most commonly used in ecological monitoring of rivers in different countries, i.e., the biotic index of Trent River, the Biological Monitoring Working Party Index (BMWP), Average Score Per Taxon Index (ASPT), the number of stoneflies, mayflies and caddisflies species (EPT), as well as the species richness and the Shannon diversity index. The maximum variability in the uncontaminated area of Breksa River falls on species richness indices, whereas the minimum one - on ASPT and TBI, which can be considered as priority indicators of habitat quality. Keywords: Bioindication; macroinvertebrates; seasonal dynamics; biotic indices; reference site References: Álvarez-Cabria, M., Barquín, J., & Juanes, J. A. (2010). Spatial and seasonal variability of macroinvertebrate metrics: Do macroinvertebrate communities track river health? Ecological Indicators, 10(2), 370-379. Bayandinova, S., Mamutov, Z., & Issanova, G. (2017). Man-Made Ecology of East Kazakhstan. Singapore: Springer. http://dx.doi.org/10.1007/978-981-10-6346-6. Biological criteria for the protection of aquatic life. Users manual for biological field assessment of Ohio surface waters. (2015). Columbus, Ohio. Ohio Environmental Protection Agency. Bonada, N., Prat, N., Resh, V. H., & Statzner, B. (2006). Developments in aquatic insect biomonitoring: A Comparative Analysis of Recent Approaches. Annual Review of Entomology, 51, 495-523. https://doi.org/10.1146/annurev.ento.51.110104.151124 Chesnokova, S. M. (2007). Biological methods for assessing the environmental objects quality: Textbook. In 2 parts. Part 1. Bioindication methods. Vladimir: Publishing house of Vladimir State University. DeShon, J. E. (1995). Development and application of the invertebrate community index (ICI). In: (eds: W.S. Davis, T.P. Simon) Biological assessment and criteria: Tools for water resource planning and decision making by CRC. Press Inc., p. 217-244. Doledec, S. (1989). Seasonal dynamics of benthic macroinvertebrate communities in the Lower Ardkhe River (France). Hydrobiologia, 182(1), 73-89. Joshi, P. C., Negi, R. K., & Negi, T. (2007). Seasonal variation in benthic macro-invertebrates and their correlation with the environmental variables in a freshwater stream in Garhwal region (India). Life Science Journal, 4(4), 85-89. Leunda, P. M., Oscoz, J., Miranda, R., & Arino, A. H. (2009). Longitudinal and seasonal variation of the benthic macroinvertebrate community and biotic indices in an undisturbed Pyrenean river. Ecological indicators, 9, 52-63. Manual on methods for biological analysis of surface water and sediments (1983). Leningrad. Marchant, R. (1982). Seasonal Variation in the Macroinvertebrate Fauna of Billabongs along Magela Creek, Northern Territory. Aust. J. Mar. Freshwater Res, 33, 329-342. Moretti, M. S., & Callistoi, M. (2005). Biomonitoring of benthic macroinvertebrates in the middle Doce River watershed. Acta Limnol. Bras., 17(3), 267-281. Morse, J. C., Bae, Y. J., Munkhjargal, G., Sangpradub, N., Tanida, K., Vshivkova, T. S., Wang, B., Yang, L., & Yule, C. M. (2007). Freshwater biomonitoring with macroinvertebrates in East Asia. Front Ecol Environ, 5(1), 33-42. Olivier, S., Blaser, C., Brutsch, S., Frolova, N., Gaggeler, H. W., Henderson, K. A., Palmer, A. S., Papina, T., & Schwikowski, M. (2006). Temporal variations of mineral dust, biogenic tracers, and anthropogenic species during the past two centuries from Belukha ice core, Siberian Altai. J Geophys Res, 111, D05309. http://dx.doi.org/10.1029/2005JD005830. Semenchenko, V. P. (2004). Principles and systems of biological indication of flowing water. Sokolov, A. A. (1952). Hydrography of the USSR. Leningrad. Soulsby, C., Malcolm, R., Gibbins, C., and Dilk, S. C. (2001). Seasonality, water quality trends and biological responses in four streams in the Cairngorm Mountains, Scotland. Hydrology and Earth System Sciences, 5(3), 433-450. Sporka, F., Vlek, H. E., Bulankova, E., Krno, I. (2006). Influence of seasonal variation on bioassessment of streams using macroinvertebrates. Hydrobiologia, 566, 543-555. Stark, J. D., Phillips, N. (2009). Seasonal variability in the Macroinvertebrate Community Index: Are seasonal correction factors required? New Zealand Journal of Marine and Freshwater Research, 43(4), 867-882. http://dx.doi.org/10.1080/00288330909510045. Tipping, E., Jarvis, A. P., Kelly, M. G., Lofts, S., Merrix, F. L., & Ormerod, S. J. (2009). Ecological indicators for abandoned mines: Review of the literature. Bristol: Environment Agency. Wenn, C. L. (2008). Do freshwater macroinvertebrates reflect water quality improvements following the removal of point source pollution from Spen Beck, West Yorkshire? Earth & Environment, 3, 369-406. Yanygina, L. V. (2014). Seasonal dynamics of biotic indices of zoobenthos in Chemal River. In Current state of aquatic bioresources. Proc. of III Inter. Conf., p. 84-86. Yanygina, L. V. (2017). Macrozoobenthos as an indicator of the ecological state of mountain watercourses. Russian Journal of Ecology, 48(2), 185-190.

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