Studies on the periodicity of chlorophyceae of Jait Sagar lake, Bundi (Rajasthan)

Abstract

The Chlorophyceae periodicity of Jait Sagar lake had been studied during Jan 2013 to Dec 2013. A total number of 44 species belonging to 15 genera of Chlorophyceae class were identified. Some of common genera belonging to Chlorophyceae of Jait Sagar lake were Pediastrum, Scenedesmus, Cosmari-um, Spirogyra, Closterium etc. The occurrence of algae varied in different study areas in various months. Scenedesmus showed a maximum popula-tion. Some species were common to all the seasons while others were repre-sented only at a particular season. The algal population was found to be maximum in summer season and the lowest in winter. Water becomes greenish due to population of Microalgae such as Pediastrum, Scenedesmus, Cosmarium and Closterium during May-October. Seasonal successions of phytoplankton are affected by strong seasonal ecological influences. In the present investigation it was observed that high temperature and pH were favourable for rapid development of Chlorophyceae.