Sampling is realised twice during the spring season as we planned.

The first field trip was realised for a period of three days (5, 6 and 7. May),  as during autumn and winter season. Samples were taken from all 12 springs. Oxygen concentration, oxygen saturation, temperature, pH, conductivity and estimate of representation of each substrate type were measured. Samples of macroinvertebrates and the water samples were collected for analyses of BPK5 and determining the concentration of ammonium ions, phosphates, nitrates and nitrites.The samples were than transported to the laboratory for analysis. The concentration of ammonium ions, phosphates, nitrates and nitrites is in expected range, usually under range.

The total number of recorded individuals during the first field trip during the spring season was 868, belonging to 14 families. The best-represented families were Chironomidae with 384 individuals, Gammaridae with 76 individuals, Tubificidae with 73 individuals and Limnaephilidae with 68 recorded individuals. The final report will include a detailed report on recorded species and results of chemical analyses.

The total number of recorded individuals during the first field trip during the spring season was 868, belonging to 14 families. The best-represented families were Chironomidae with 384 individuals, Gammaridae with 76 individuals, Tubificidae with 73 individuals and Limnaephilidae with 68 recorded individuals. The final report will include a detailed report on recorded species and results of chemical analyses.

The second field trip during the Spring season was realised for a period of three days (19. 20. and 21. May ). Samples were taken from all 12 springs. Oxygen concentration, oxygen saturation, temperature, pH, conductivity and estimate of representation of each substrate type were measured. Samples of macroinvertebrates and the water samples were collected for analyses of BPK5 and determining the concentration of ammonium ions, phosphates, nitrates and nitrites.The samples were than transported in the laboratory for analysis. The concentration of ammonium ions, phosphates, nitrates and nitrites is in expected range, usually under range.

The total number of recorded individuals during the second field trip during the spring season was 654, belonging to 16 families. The best-represented families were Limnaephilidae with 287 individuals, Chironomidae with 228 individuals and family Gammaridae with 188 detected individuals.Promotion of the project  was realised with volunteers to the local people. Presentation of the project with results in poster form also has been successfully realised to the pupils from the Primary school “Učitelj Tasa” in Niš.

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