Abstract
The study of morphology of Cyclotella distinguenda from the karst Lake Klyuchik (Nizhny Novgorod Region) revealed that several quantitative characters (such as valve diameter and the number of marginal fultoportulae) demonstrated more variability in that species as compared to published data. Among the investigated characteristics, valve diameter (variation coefficient CV = 34.5%) and number of marginal fultoportulae (CV = 31.5%) were the most variable. The number of striae in 10 μm (CV = 10.0%) was the least variable character. For the first time, during the investigated period of massive growth of that species in the lake, the presence of initial valves was revealed. C. distinguenda can be characterized as cryophilic halophilous taxon which prefers sulphate-hydrocarbonate and neutral to light alkaline waters.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
