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 SM ISO690:2012MOSANU, Elena, SANDU, Maria, TARITA, Anatol, LOZAN, Raisa. The trophical state of lakes from the Dniester river basin. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 182. ISBN 978-9975-62-428-2. |
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| Achievements and perspectives of modern chemistry 2019 | ||||||
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Conferința "International Conference "Achievements and perspectives of modern chemistry"" Chişinău, Moldova, 9-11 octombrie 2019 | ||||||
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| Pag. 182-182 | ||||||
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The trophic status of the lake ecosystem is the result of a complex interaction of processes that occur under the influence of natural and anthropogenic factors not only in the reservoir itself, but also in the entire hydrographic basin. Increasing nutrient and organic content is therefore a particular threat to the internal environment, especially small reservoirs whose self-purification capacity is significantly reduced, generating eutrophication by stimulating excessive algal growth.Eutrophication status of lakes was assessed using conventional classification [3] on the one hand, and Carlson trophic status index (TSI) on the other hand [1]. The ecological potential of the lakes in the study area by the trophic index was assessed by determining the transparency (Secchi disc), the content of chlorophyll ”a”, total phosphorus and oxygen saturation [2]. The concentration of chlorophyll ”a” in the lakes studied ranges from <1 mg/L in Ghidighici lake (used for irrigation, recreation and fishing) to 242.7 mg/L in Salas Lake (used as a food reproduction of the Gura Bacului farm); the Ptot values range from 0.85 mg/L in Lake 1, Telita Noua and Ghidighici lake to 32.61 mg/L in Salas Lake; the transparency is within the range of 0.2-0.6 m. Based on these parameters, the TSItot and the trophic status of lakes have oligotrophic characteristics for lakes 1 Telita Noua and Ghidighici, mesotroph for Lake Telita Noua and eutrophic for Salas Lake (table). The trophic status, after oxygen saturation of the water of the studied lakes, has oligotrophic and ultra-oligotrophic characteristics (70 - 111%). Table. Interpretation of values of the trophic status index of lakes in the area of the study area |
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