This publication assessed the water quality and ecological aspects of the Ouro Creek, in the municipality of Caxias/MA, by analysing physical, chemical and biological parameters, with a view to determining its classification and suitability for its various uses. The quality and alterations to the water body were analysed using physical parameters (pH, Conductivity, True Colour, Turbidity, Temperature, Total Solids and Total Dissolved Solids), chemical parameters (Nitrite, Nitrate, Total Phosphorus, Alkalinity, Iron, Total Hardness and Ammoniacal Nitrogen) and biological parameters...

Ce livre traite des espèces de Turneraceae présentes dans un fragment de Cerrado dans la municipalité de Caxias/Maranhão. Il présente une liste d'espèces, une clé d'identification et une description des sept espèces de Turneraceae présentes dans la région, la distribution géographique, le nom commun, le matériel examiné et les principaux aspects morphologiques permettant d'identifier les espèces. Comme il s'agit d'une famille botanique d'une grande importance économique et environnementale, et que cette étude fournit de nouvelles informations sur ce groupe de plantes, on...

The book deals with the species of Turneraceae occurring in a Cerrado fragment in the municipality of Caxias/Maranhão. It presents a species list, identification key and description of the seven species of Turneraceae occurring in the region, geographical distribution, common name, material examined and the main morphological aspects for identifying the species. As this is a botanical family of great economic and environmental importance, and as this study provides new information on this plant group, it is considered that this work will serve all those interested in the knowledge,...