identification of algae as pollution bioindicators in shakhkenar, gavkhouni wetland, isfahan

Identification of algae of shakh-kenar,gavkhouni wetland, was studied from september2017 to november 2018 at three stationswith three replication. totaly, 69 speciesand 43 genera belonging to six divisionswere identified. species were belonging tothe bacillariophyta, chlorophyta, cyanophyta,euglenophyta, dinophyta and chrysophyta.the density variations of the algaewere between 98 and 1597 cells/cm3. thehighest density was found at station 1 in autumn.according to the shannon-weaver index,the highest and the lowest diversity wereobserved in autumn and winter, respectively.bacillariophyta, especially pennate forms;such as navicula, nitzschia, cymbella, andulnaria were semi dominant in the moststations. from chlorophyta; pediastrum,cladophora and scenedesmus were showedconspicuous increase in summer and earlyautumn. chroococcus disperses (keissl.)lemn, merismopedia punctata meyen, oscillatoriasp. were demonstrated more abundancein autumn. phacus sp., euglena caudatahubner, trachelomonas playfair defl.,glenodinium quadridense (stein.) schiller,ceratium hirundinella (of. muell.) duj andperidinium cinctum muell., were observedin later summer and autumn. regarding totaxa list, kind of pollution index algae andwater quality index were recognized fromchlorophyta, cyanophyta, dinophyta andeuglenophyta, that they play important rolemodify water odor/taste, corrosion of tubes,methods, and production of toxins.