Study of Changes of Trophic Status of the Kuchurganske Reservoir in 2006-2018
Abstract
Purpose. Assessment of the trophic status of water in the Kuchurganske Reservoir in 2006-2018. Methods. Determination of hydrological, hydrochemical and hydrobiological characteristics of the water body's environment has been done using standard methodologies. Four indicators of water eutrophication have been used: chlorophyll a concentration, bacterioplankton number, trophic indices TSI and TRIX. Results. Features of physicochemical characteristics of water in the water-body have been analysed. Higher water temperature has been registered in the middle and lower parts of the water-body compared with its upper reaches. Mineral content increase in water has been found in the direction from lower to upper part; the critical for hydrobionts life decrease of oxygen concentration has been registered in the upper reaches the most often. Analysis of long-term changes in chlorophyll a and bacterioplankton has been carried out. Statistical interconnections have been established between trophic state indicators and physicochemical characteristics of the reservoir. A close positive correlation has been registered between chlorophyll а content and bacterioplankton number, which is caused by the functional dependence of bacteria on the organic matter produced by phytoplankton. It has been shown that with an increase of water volume in the reservoir the value of these indicators of trophic status went down, which was proved by close negative correlation dependence between those values and the depth of water-body. It was demonstrated for the first time that water transparency revealed close significant negative correlation with all the indices and indicators of water trophic status, which evidenced the possibility to use the transparency as a simple indicator of water trophic state as established that the Kuchurganske Reservoir’s trophic status assessment on chlorophyll a, bacterioplankton and the TSI trophic index practically coincided and evidenced the increase in trophic status of the water-body from eutrophic to hypertrophic in last 2016-2018. The reservoir’s upper reaches were characterized by higher water trophicity compared with the central and lower parts. The values of TRIX trophic index developed for marine water assessment had practically always been showing higher trophic status compared to other indicators.
the more transparent is the water the lower is trophicity and the higher is the quality of the aquatic environment. Conclusions. It was
Downloads
References
Filipenko, S.I. (2014). Ekologicheskie problemy Kuchurganskogo vodohranilischa [Ecological problems of the Kuchurgany Reservoir]. Hydroecological and bioecological problems of the Northern Black Sea Area: Materials of the 5th International scientific and practical Conference. Tiraspol. PGU, 283-286 [In Russian].
Usatyi, M., Unguryanu, L., Krepis, O., Strugulya, O., Usatyu, A., Shaptefrats, N. (2013). Massovoye razvitie sine-zelenykh vodorosley v Kutchurganskom vodohranilische, ego prichiny, posledstviya i predotvrascheniye [Mass development of blue-green algae in the Kuchurgan Reservoir, its reasons, consequences and prevention]. Management of the trans-border Dniester basin in the framework of new basin Agreement: Materials of International Conference. Chişinău, 438-442 [In Russian].
Ignatyev, I., Slesarenok, S., Trombitskiy, I. (2010). Proekt «Demokratizatsiya upravleniya transgranichnym basseynom reki Dnestr» – horoshiy primer vnedreniya integrirovannogo upravleniya vodnymi resursami [«Democratization of management of the trans-border Dniester River Basin» Project – a good example of integrated water resources management implementation]. Dniester River Basin: ecological problems and trans-border nature resources management: Materials of International scientific and practical Conference. Tiraspol. PGU, 75-78 [In Russian].
Carlson ,R.E. (1997). A trofic state index for lakes. Limnology and Oceanography, 22, 361-369.
Vollenweider, R.A., Giovanardi, F., Montanari, G., Rinaldi, A. (1998). Characterization of the trophic condi-tions of marine coastal waters with special reference to the NW Adriatic sea: proposal for a trophic scale, turbidity and generalized water quality index. Environmetrics, (9), 329-357 [in English].
Kovalova, N., Medinets, V., Snigirov, S., Derezyuk, N. (2009). Otsenka kachestva vod vodnykh obyektov Nizhnego Dnestra [Water quality assessment in the Lower Dniester water objects]. International cooperation and trans-border basin management for the Dniester River environmental health improvement. Materials of International Conference. Odessa, 131-135 [In Russian].
Medinets, V.I., Kovalova ,N.V. (2010). Otsinka trofichnogo stanu vodoymysch deltovoyi chastyny Dnistra z vykorystannyam indeksu TSI [Assessment of trophic state of the Dniester deltaic water-bodies using TSI in-dex]. Ecological and economic problems of the Dniester. VIIth International scientific and practical Confer-ence. Odessa, 45 [In Ukrainian].
Medinets, V.I., Konareva, O.P., Kovalova, N.V., Snigirov, S.M., Bilanchyn, Ya.M., Chichkin, V.N., Gazyetov, Ye.I., Derezyuk, N.V., Nazarchuk, Yu.S. (2008). Rezultaty issledovatelskogo monitoring v rayone basseina Nizhnego Dnestra [Results of research monitoring in the Lower Dniester Basin area]. Management of the trans-border Dniester River basin and Water Framework Directive of the European Union. Materials of In-ternational Conference. Chisinau. Eco-TIRAS, 192-195 [In Russian].
Kovalova, N.V., Medinets, V.I., Konareva, O.P., Snigirov, S.M., Medinets, S.V., Soltys, I.E. (2010). Gidroekologichnyi doslidnytskyi monitoring baseinu Nyzhnyogo Dnistra [Hydroecological research monitor-ing of the Lower Dniester Basin]. Proceedings of Ternopil National V.Gnatyuk Pedagogical University. Se-ries: Biology. Special Issue: Hydroecology, (3(44)), 113-116 [In Ukrainian].
Kovalova, N.V., Medinets, V.I., Konareva, O.P., Medinets, S.V. (2012). Integralnaya otsenka troficheskogo sostoyaniya vodnykh obyektov deltovoi chasti Dnestra [Integrated assessment of trophic state of the Dniester deltaic part water objects]. Current problems of hydroecology. Perspectives, ways and methods of solution. Materials of the 3rd International Conference. Kherson, 198-201 [In Russian].
Kovalova, N.V., Medinets, V.I., Medinets, S.V. (2017). Troficheskiy status vod Kuchurganskogo limana v 2006-2017 gg. [Trophic status of the Kuchurgany Estuary waters in 2006-2017]. Integrated management of the Dniester trans-border basin: Platform for cooperation and modern challenges. Materials of International Conference. Tiraspol. Eco-TIRAS, 183-187 [In Russian].
Eutrophication of Waters, Monitoring, Assessment and Control. (1982). OECD (Organisation for Economic Cooperation and Development). Paris: OECD [in English].
Romanenko, V.D., Zhukinskiy, V.M., Oksiyuk, O.P. et al. (1998). Metodyka ekologichnoyi otsinky yakosti poverkhnevykh vod za vidpovidnymy kategoriyamy [Methodology of surface waters environmental quality assessment according to respective categories]. Kyiv. SYMVOL-T, 28 [In Ukrainian].
Kovalova, N.V., Medinets, V.I., Medinets, S.V., Konareva, O.P., Soltys, I.E., Gazyetov, Ye.I. (2018). Trofichnyi status deltovykh ozer Dnistra u 2006-2017 rr. [Trophic status of the Dniester deltaic lakes in 2006-2017]. Visnyk of V.N.Karazin Kharkiv National University Series Ecology, (18), 30-41 [In Ukrainian].
Kovalova, N.V., Medinets, V.I. (2012). Otsenka sovremennogo sostoyaniya vod Dnestrovskogo limana s ispolzovaniem troficheskih indeksov TSI i TRIX [Assessment of current state of the Dniester Estuary waters using the TSI and TRIX trophic indices]. Estuaries of the north-western Black Sea: urgent hydro-ecological problems and the ways to solve them. All-Ukrainian scientific and practical Conference. Odessa Ecological University, 94-97 [In Russian].
Kovalova, N.V., Medinets, V.I., Medinets, S.V. (2018). Trofichnyi stan vod Dnistrovskogo lymanu v litni periody 2012-2017 rr. [Trophic state of the Dniester Estuary waters in summer periods of 2012-2017]. Ecol-ogy, environmental protection and sustainable nature management: education-science-production-2018. Proc. of the XХIth International scientific and practical Conference. Kharkiv, 103-106 [In Ukrainian].
Kovalova, N.V., Medinets, V.I., Mileva, A.P., Botnar, M.G., Snigirov, S.M., Gazyetov, Ye.I., Medinets, S.V. (2017). Porivnyalna otsinka yakosti pryberezhnykh morskykh vod Odeskoyi zatoky i raionu ostrivu Zmiinyi v 2016 r. [Comparative characteristics of marine coastal waters in Odesa bay and the Zmiinyi Island area in 2016]. Visnyk of V.N.Karazin Kharkiv National University Series Ecology, (16), 132-140 [In Ukrainian].
Authors reserve the right of attribution for the submitted manuscript, while transferring to the Journal the right to publish the article under the Creative Commons Attribution License 4.0 International (CC BY 4.0). This license allows free distribution of the published work under the condition of proper attribution of the original authors and the initial publication source (i.e. the Journal)
Authors have the right to enter into separate agreements for additional non-exclusive distribution of the work in the form it was published in the Journal (such as publishing the article on the institutional website or as a part of a monograph), provided the original publication in this Journal is properly referenced
The Journal allows and encourages online publication of the manuscripts (such as on personal web pages), even when such a manuscript is still under editorial consideration, since it allows for a productive scientific discussion and better citation dynamics (see The Effect of Open Access).
