Özge Ertunç Başören, Nilgün Kazancı Hacettepe University, Science Faculty, Biology Department, Hydrobiology Section, Ankara, Turkey ozzzge@gmail.com   Abstract Yeşilırmak River is one of the most important running waters of Turkey. Various human activities (urban waste water, sewage, dams, agricultural activities, habitat degradation) and their impacts cause to disturbances of the water and habitat quality of […]