Análisis de la calidad del agua mediante la identificación de diatomeas epilíticas en la microcuenca del río Cebadas

Abstract

The objective of this study was to analyse the water quality by identifying epileptic diatoms in the Cebadas River micro-basin. Four monitoring was carried out in the Ozogoche, Atillo, Yasepan and Cebadas rivers. Water samples were collected to analyse physicochemical parameters such as pH, Temperature, Electrical Conductivity, Dissolved Oxygen, Nitrites, Nitrates, Sulfates, Phosphates and Ammoniacal Nitrogen. Finally, it was determined that the water quality of the Microbasin was good because Parameters such as pH and dissolved oxygen comply with the limits established in the Unified Text of Secondary Legislation of the Ministry of the Environment. It was determined that the Atillo River has the lowest pH and the highest oxygen concentration. In contrast, the Yasepan River has a higher pH, and the Ozogoche River has a higher dissolved oxygen concentration. Diatoms were collected using stones from each river, which were subjected to a cleaning and conservation process in eppendorf tubes for their

subsequent analysis in the laboratory. Once the diatoms were identified and accounted for, diversity indices such as Shannon, Simpson and the Specific Polusensitivity index (IPS) were used to determine the abundance of diatoms. The study carried out in the Micro-basin allowed us to identify the presence of 44 species of diatoms grouped in 23 genera. The IPS analysed has allowed us to qualify that the Cebadas River Micro-basin maintains a quality that goes from good to excellent with susceptible species such as Encyonema, Cymbella, Eunotia and Tabellaría themselves that, in contrast to the physical and chemical parameters analysed, guarantee the favourable state of the quality of water resources. Through the photographic documentation of diatoms, a comparative study can be carried out based on the research work carried out in the country's different national parks and nature reserves.