جستجوی مقالات مرتبط با کلیدواژه « رودخانه اهرچای » در نشریات گروه « زیست شناسی »

Diatoms are one of the biological indicators suitable for evaluating river water quality. Diatoms reflect the ecological conditions of aquatic ecosystems so that some diatoms choose a polluted environment for growth. Thus, diatoms can be used as an indicator of pollution. In this regard, the present study was conducted in order to determine the diatom flora of the Ahar-Chai River and to investigate the effect of environmental factors on diatom communities. In this study, 6 sampling stations were determined in the Ahar-Chai River. Sampling was done seasonally in 2019. In general, the number of 40 genera and 123 species were observed in this river, the most species diversity are Cymbella, Nitzschia, Navicula, and Gomphonema, all four genera belong to the Bacillariphyceae. A high biodiversity of diatoms was observed in spring and summer. The statistical analysis of this research showed that parameters such as temperature, pH, electrical conductivity (EC), turbidity, light, and amount of nutrients have a significant effect on the distribution of diatoms along the Ahar-Chai River.