The phytoplankton communities and
related physical-chemical features of the Euphrates River at its middle region
inside Iraqi territory were studied during the study period from October 2011
to September 2012. Samples were taken from Al-Musayab district extending to
Al-Hindia district. The phytoplankton community (quantitative, qualitative and
Chlorophyll-a) have been studied, in addition to many environmental parameters
such as temperature, pH, electric conductivity (EC), Salinity (‰), TDS, TSS, dissolved oxygen, BOD5.
A total of 105 phytoplankton taxa belonging to Bacillariophyta (69), Chlorophyta
(19), Cynophyta (12), Euglenophyta (3), and Dinophyta (2) were recorded within
the present study period. Some algal genera dominated mostly in the study
period and sites such as Scendesmus, Melosira, Cymbella, Diatoma, Navicula, Nitiazschia and Syndera. A
statistical analysis was done using the canonical correspondence analysis (CCA).