Investigation of the effects of some environmental variables on the zoobenthic community structure: The case of Porsuk Stream (Sakarya River, Türkiye)

In order to examine the effects of some physicochemical parameters on zoobenthic community structure in Porsuk Stream, seasonal samples were collected from 6 stations between 2020-2021, and also measured. Within scope study, a total 30 families, 4 Gastropoda, 1 Bivalvia, 3 Clitellata, 22 Insecta, identified. Families Tubificidae, Erpobdellidae, Chironomidae identified at each station. Dominant groups Stream zoobenthos; Tubificidae (41.90 %), (16.68 Gammaridae (7.84), Valvatidae (6.16 Naididae (5.30 Asellidae (3.73 Physidae (% 3.48 Dreissenidae (3.16 Baetidae (3.07 Simuliidae (1.70 Erpobdellidae (1.69%) Lymnaeidae (1.32 respectively. The highest dissolved oxygen value was measured Sobran with an average 11.3 mg/L. Detection Caenidae Ephemeroptera Hydropsychidae Trichoptera low tolerance pollution results Canonical Correspondence Analysis this station shows that concentration is effective distribution taxa determined basin. At same time, has BMWP (64) Shannon (2.22) values.