Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Petya ZAHARIEVA, Radoslava ZAHARIEVA, Diana KIRIN
This study assesses the ecological state of the surface water of the Mechka River from the Maritsa River Basin usingthe biological quality element macrozoobenthos. Four sampling sites (biotopes) were investigated in autumn 2024 along the Mechka River - 1) near the village of Lenovo; 2) near the village of Poroyna; 3) between the town of Parvomay and the village of Poroyna and 4) before the town of Parvomay. A total of 772 specimens of macrozoobenthos from 36 taxa were identified. The highest number of macroinvertebrate taxa was identified in the second biotope (21 taxa) and the lowest - in the first (14 taxa). The study shows that in three of the four biotopes, macroinvertebrates of Group C (relatively tolerant forms) dominate, whereas in Biotope 3) Mechka River between the town of Parvomay and the village of Poroyna, Group D (tolerant forms) dominates. Basic indices and metrics were calculated according to an established methodology.
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