Species composition of cyanophyceae in keenjhar lake, district thatta, Sindh, Pakistan

56 species belonging to 20 genera of Order Chroococcales, Oscillatoriales and Nostocales as under are being recorded for the first time from Keenjhar Lake, Sindh, Pakistan.Chroococcales: Aphanothece, Chroococcus, Coelosphaerium, Gloeothece, Gloeocapsa, Gomphos-phaeria, Microcystis, Merismopedia. Oscillatoriales: Arthrospira, Lyngbya, Oscillatoria, Phormidium and Spirulina. Nostocales: Anabaena, Anabaenopsis, Calothrix, Nostoc, Rivularia

Occurrence of Phytoplanktonic Communities in River Indus at the Kotri Barrage, Sindh, Pakistan

Qualitative phytoplanktonic samples were collected twice from November 2001 to January 2002 at the Kotri Barrage. A total of 26 phytoplanktonic species were identified. They included 12 species belonging to Chlorophyceae, 9 species to Cyanophyceae, 3 species to Bacillariophyceae, and 2 species to Dinophyceae. Among the Chlorophyceae, Pediast rum, Spirogyra and Scenedesmus genera were found dominant while among Cyanophyceae, Aphanocapsa, Gloeocapsa and Microcystis were dominant in River Indus