Objective:To relate the proliferation and dominance of certain algal species at the Damietta and its relation to water quality.Methods:Water and algal biomass were bimonthly sampled from five selected sites at Damiett...Objective:To relate the proliferation and dominance of certain algal species at the Damietta and its relation to water quality.Methods:Water and algal biomass were bimonthly sampled from five selected sites at Damietta Province,Egypt during 2012.Algae were identified and quantified.Waters,algae and sediment were analyzed.Results:The physicochemical properties of water showed limited seasonal but substantial local variation.The high levels of nitrogen and phosphorus and turbidity of water pointed to marked eutrophication,which could enhance massive algal growth.The temporal fluctuation in temperature,exposure to industrial and domestic sewage and salinity results in succession between blooming algal species.Spirulina platensis and Chlorella vulgaris alternated in a moderately saline water and Oscillatoria agardhii and Mougeotia scalaris in a fresh water body during summer and winter respectively.Likewise,Microcystis aureginosa and Ulva lactuca alternated in a moderately saline site during autumn and summer respectively.Cladophora albida dominated a fish pond of brackish water and Dunaliella salina dominated the most saline water over the whole period of study.Conclusions:Growth of the predominant algal species is correlated to water quality.These species are of considerable nutritive value,with moderate contents of protein,carbohydrate,macronutrients and micronutrients,which evaluates them for usage as food(green and macroalgae),fodder or bio-fertilizer(cyanophytes).展开更多
文摘Objective:To relate the proliferation and dominance of certain algal species at the Damietta and its relation to water quality.Methods:Water and algal biomass were bimonthly sampled from five selected sites at Damietta Province,Egypt during 2012.Algae were identified and quantified.Waters,algae and sediment were analyzed.Results:The physicochemical properties of water showed limited seasonal but substantial local variation.The high levels of nitrogen and phosphorus and turbidity of water pointed to marked eutrophication,which could enhance massive algal growth.The temporal fluctuation in temperature,exposure to industrial and domestic sewage and salinity results in succession between blooming algal species.Spirulina platensis and Chlorella vulgaris alternated in a moderately saline water and Oscillatoria agardhii and Mougeotia scalaris in a fresh water body during summer and winter respectively.Likewise,Microcystis aureginosa and Ulva lactuca alternated in a moderately saline site during autumn and summer respectively.Cladophora albida dominated a fish pond of brackish water and Dunaliella salina dominated the most saline water over the whole period of study.Conclusions:Growth of the predominant algal species is correlated to water quality.These species are of considerable nutritive value,with moderate contents of protein,carbohydrate,macronutrients and micronutrients,which evaluates them for usage as food(green and macroalgae),fodder or bio-fertilizer(cyanophytes).
