Physico-Chemical Properties of Al-Daghara River with Survey of Epipelic Algae/Middle of Iraq.

Abstract

The Physico-chemical properties and epipelic algae in Al-Daghara river were studied during the period from November 2007 to April 2008 .Three stations were selected , the water quality of the river was alkaline,very hard, oligohaline and well oxygenated . Carbon dioxide concentration were variable according to different sites. Among the of 117 species algal taxa were identified , the dominance was to Bacillariophyceae 74% followed by Chlorophyceae 14% then Cyanophyceae 12% . The highest algal total number of epipelic algae was in station (1) in March 2008 about 8.333×104 cell/cm2. The lower algal number was in the same stationat in December 2.291×104 cell/cm2 .The most dominant species were Cocconies placentula , Fragilaria crotonensis , Nitzschia vermicularis . N. sigmoedia .