Naslov
Water quality of mining impacted rivers in the north-eastern Macedonia: II. Microbiological water quality of rivers Bregalnica, Zletovska and Kriva – Preliminary results

Autori
Kapetanović, Damir ; Valić, Damir ; Vardić Smrzlić, Irena ; Jordanova, Maja ; Rebok, Katerina ; Ramani, Sheriban ; Dragun, Zrinka ; Filipović Marijić, Vlatka ; Krasnići, Nesrete ; Uzunov, Risto ; Cvetkovikj, Aleksandar ; Hajrulai-Musliu, Zehra ; Stojanovski, Stojmir ; Nastova, Rodne ; Kostov, Vasil

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
International scientific workshop Influence of active mines on freshwater ecosystems / Dragun, Zrinka - Zagreb : Institut Ruđer Bošković, 2014, 7-8

ISBN
978-953-7941-00-0

Skup
Influence of active mines on freshwater ecosystems

Mjesto i datum
Zagreb, Hrvatska, 12.05.2014. - 16.05.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
water quality ; Macedonia ; mining ; total coliforms ; enterococci

Sažetak
Contamination of surface waters is a world-wide environmental problem. Anthropogenic activities like industry and mining can increased metal concentrations in the surface waters and may result in significant deterioration of water quality. Microorganisms are commonly used as biological indicators of surface water conditions. Microorganisms respond rapidly to changes in their environment due to their short generation time. Metal toxicity, acidic pH and low nutrient levels result in stressed microbial communities. High levels of heavy metals can affect the structure of microbial communities, resulting in decreased metabolic activity and diversity of microorganisms. Therefore, there is a need to monitor microbial water quality and to provide insight into their interactions with the impact of mining and the subsequent implications on the rivers ecosystem function. Two rivers were chosen for this study in autumn 2012, the Zletovska River, which receives waste from the Zletovo mine, and the Kriva River, which receives waste from the Toranica mine. The Bregalnica River was chosen as a non-impacted aquatic system. Microbiological analyses of river water were performed using defined substrate technology. Total coliforms bacteria were identified using Colilert test (IDEXX Laboratories., Westbrook, USA), whereas enterococci were identified using Enterolert-E test (IDEXX Laboratories). Total coliforms and enterococci were enumerated using Quantitray 2000 (IDEXX Laboratories), which used a 97-test-well system and provided the most probable number (MPN) of bacteria/100 mL. Analysis of the microbial water quality showed higher levels of bacterial indicators in the rivers Kriva and Bregalnica downstream from the big cities. Together with significantly higher number of bacterial indicators an increase in nitrate and phosphate was observed, indicating a particular anthropogenic impact on these rivers. A small number of bacterial indicators were found in the Zletovska River, indicating less anthropogenic influence, but it is not possible to say is that the effect of pollution from mining activities. A small number of bacterial indicators were found in the Zletovska River, indicating less anthropogenic influence, but it is not possible to conclude if that was the effect of pollution from mining activities. Based on these preliminary results from one sampling season, it can be concluded that the impact of large cities is significant on analyzed rivers from a microbiological point of view.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Biologija, Veterinarska medicina

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