Determination of water quality in dDipsiz-Çine (Muğla-Aydin) stream according to macrozoobentic organisms and physicochemical methods

This study was carried out between periods of 2015-2016 and 2020 in order to determine water quality changes in Dipsiz-Çine (Muğla-Aydın) Stream according to macrozoobentic organisms and physicochemical methods. From chosen 6 stations on Dipsiz- Çine Stream water samples were taken and macrozoobentic organisms were collected. In order to determine the physico-chemical properties of water, ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, ortho-phosphate phosphorus, total hardness, sulfate hardness, carbonate hardness, calcium ion and magnesium ion were measured and evaluated. Water temperature, conductivity, pH, dissolved oxygen parameters were measured during the field. Samples belonging to Mollusca, Annelida and Arthropoda branches were collected from the research area. 88 taxa belonging to the classes Gastropoda, Bivalvia, Oligochaeta, Hirudinea, Arachnida, Crustacea and Insecta were determined. Frequency, dominance, diversity values of macrozoobentic organisms determined at stations and similarities of stations with respect to these organisms were determined and evaluated together with water quality results. ASPT, BMWP, Belgian Biotic Index, Saprobi Index, Pollution Tolerance Index and Family Biotic Index were used to determine water quality and water quality was determined according to the results obtained. Physicochemical data were interpreted according to Klee (1991), and 1 st and 3 th stations I-II. in quality class, 2 nd, 5 th and 6 th stations II. in quality class, 4. station II-III. determined to be in the quality class. According to surface water quality legislation (2012), the water quality classes of the stations are 1 st, 2 nd and 3 th, 4 th, 5 th and 6 th stations are included in I. Class (high quality) water quality class. It has been determined that the stations are included in the II. Class (less polluted) water quality class. Dipsiz-Çine Stream is included in critically polluted water class according to FBI, slightly polluted water class according to BBI, slightly polluted water class according to SI, slightly polluted water class according to ASPT and moderately polluted water class according to BMWP has been determined. The values obtained from ASPT, BMWP, Belgian Biotic Index, Saprobi Index, Pollution Tolerance Index and Family Biotic Indexes were examined in a common table and it was observed that there were differences in water quality classes between the indices.