Akademik Veri Yönetim Sistemi
Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, cilt.16, sa.1, ss.273-285, 2023 (Hakemli Dergi)
This study focuses on seasonal and temporal variations of the biodiversity and composition of the phytoplankton community in Karasu River. The phytoplankton and water samples were collected bimonthly from a depth of 0.5-8 m during the period from January 2019 to July 2019 from five stations. Four diversity indices (Shannon- Wiener, Simpson, Margalef and Menhinick) were studied. MINITAB 15 Software was used to interpret the relationship between the indices. Average water temperature, dissolved oxygen, pH and electritrical conductivity values were measured as 19.43 °C, 7.9 mg L, 8.3 and 465 mS/cm, respectively. In this study, a total of 123 phytoplankton species were identified. Among these species, 106 species belonging to Bacillariophyta group, 10 species belonging to Chlorophyta group, 6 species belonging to Cyanobacteria group and 1 species belonging to Euglenophyta group were included. Throughout the study, Shannon-Wiener, Simpson Margalef, and Menhinick diversity indices were calculated as 1.83 H ́, 11.53, 5.12 and 0.83 and respectively. As a result of this study, phytoplankton diversity indices and ecological status assessment based on water quality were not found to be compatible. However, introducing reference conditions for different cities can increase the usability of the indices thus we recommend expanded further studies. Keywords: Shannon-Wiener, biodiversity indices, phytoplankton, Karasu River