Diatomáceas da Represa do Itacorobi (Ana D'Avila) Florianópolis - Santa Catarina - Brasil (Chrysophyta — Bacillariophyceae)
Abstract
AbstractOur taxonomic and ecological study of the Diatoms took place at Ana D'Avila Dam located in the Island of Santa Catarina, Santa Catarina State Brazil. 76 taxoms were determined among species, varieties and forms with predominance of oligohalobous, acidophilous, oligosaprobic and oligotrofic elements. Through an ecological analysis of the species we were able to conclude that the hygienic and sanitary conditions of the water had been altered from poluted to potable in several times of the year; and this was proven through a chemical and bacteriological analysis when the total residual exams were done pH, free carban dioxide, alkalinity, permanent and temporary strength, color, odor, clorets, oxidability, N.M.P. of fecal coliforms and total.
Resumée
Il a été realise une étude taxonomyque et écologique des Diatomés de la retenue du barrage de Ana D'Ávila, placée dans l'Ile de Santa Catarina, dans L'Etat de Santa Catarina — Brasil. II a été identifié 76 taxons en comptant les espéces, variétés et formes avec prédominance des éléments oligohalobes, acidophiles, oligosaprobes et oligotrophiques. Aprés analyse écologique des espéces nous avons conclu que les conditions sanitaires de ces eaux varient du potable au pollué en fonction des époques de l'année, ce que nous avons vérifié par des analyses chimiques et bacteriologiques, qui a inclu des exames du résidus total, pH, gaz carbonique libu, alcalinité, sulféte, chlorete, oxydabilité, dureté temporaire et permanente, couleur, odeur et gout.
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