Study of algal community characteristics in Liujiaxia Reservoir was carried out from July 2009 to March 2010.A total of 114 species were identified,belonging to 55 genera,33 families,16 orders,11 classes and 8 phyla.Bacillariophyta was dominant (34.0%) in dry season and subdominant (21.5%) groups in wet season.However,Chrysophyta was the dominant (27.0%) in the wet season and subdominant (18%) during the dry season.The water quality in Liujiaxia Reservoir was evaluated,based on the information from algal community characteristics and other relevant physiochemical parameters.The results showed that the quality of water from sampling sites 1# and 2# were undisturbed.There was light to middle degree of water pollution in sampling sites 3# and 4# and,heavier pollution in sites 5# and 6#.Correlation analysis for binary variables was carried out between the algal community structure and the major physiochemical parameters measured in this research.The result suggested that,in dry season,the major environmental factor that controlling the algal community structure was DO,followed by TN,pH,T and Mcb.Whereas,the primary controlling factor was same as DO,however,followed by Mcb,pH and TN in wet season. |