Algas como bioindicadores da qualidade da água

Abstract

The global population growth and technological development have increasingly wastes generation which adversely the ecosystems. To assess the contamination level from aquatic environment, have been studied biological communities capable of perform the role to aquatic bioindicators; among them are phytoplankton, macroalgae, seaweed, macroinvertebrates and fishes. The algae shall be considered change indicators, besides they have useful spread on the globe. The present study aims to understand the algae basic information and then provide general analyses about the role of algae like pollutants bioinidcators in natural aquatic ecosystems. The algae are organisms with an ordinary morphology, which can be mono- or multiple-cell, they have not actual roots, stem or leaves and all of them are autotrophs. Their trophic level are inferior to the others, so the algae suffer direct modifications. The algae monitoring features are a favorable tool, which can be apply to assess the presence of environmental contaminants and their adverse aquatic health effect. There have been regarded studies of algae behavior in addition of certain pollutants that can be found in nature, mainly, as a result of domestic and industrial not treated effluents input. Three different types of algae have been considered, all of fresh water, Chorella vulgaria, Pseudokirchneriella subcapitata and Scenedesmus subspicatus. It have been noticed that algae are capable of easily identify pollutants