Identificación de diatomeas epilíticas asociadas a la calidad de agua del río Illuchi, cantón Latacunga, provincia de Cotopaxi, período octubre 2020 - marzo 2021.

In this research was possible to identify different species of epilithic diatoms associated with the water quality of the Illuchi river, where a total of 31 epilithic diatoms species were identified at the water resource; The sampling was carried out at three specific points along the river during November, December 2020 and January 2021; at the high point (Laguna de Salayambo) 29 species were found where 8 are abundant: Cyclostephanos invisitatus, Fragilaria arcus, Fragilaria ulna, Melosira varians, Nitzschia acicularis, Nitzschia linearis, Rhoicosphenia abbreviata, Tabellaria flocculosa; while at the midpoint (Hacienda Noelanda) 30 species were identified of which 9 are abundant: Achnanthidium minutissimum, Cyclostephanos invisitatus, Diatoma mesodon, Epithemia turgida, Fragilaria arcus, Grunowia sinuata, Melosira varians, Pinnularia maior, Rhoicosphenia abbreviata; finally in the low point (Barrio Saragosín) there were 31 species where 7 were considered abundant among which are: Cocconeis lineata, Diatoma mesodon, Epithemia turgida, Fragilaria arcus, Fragilaria ulna, Gomphonema clavatulum, Rhoicosphenia abbreviata; recognizing a total of 6228 individuals at the three sampling points. To calculate the Water Quality Index (ICA), 9 physical-chemical and microbiological parameters were used, among them: (pH, Temperature, Turbidity, Dissolved Oxygen, Total Dissolved Solids, Nitrates, Phosphates, Fecal Coliforms and Biochemical Oxygen Demand '' BOD5 ''), which were processed in the IQAData program, where point 1 obtained a result of 70.18 indicating a Regular rating, while point 2 indicated a Regular rating with a value of 52.2 and finally in point 3 had a value of 46.87 being its Bad rating. Subsequently, the Water Quality Trophic Index (ITCA) was compared through its tables; where point 1 obtained a value of 1.41 indicating that it is an oligotrophic value, that is, its contamination is negligible, at point 2 the value was 1.53 being β-mesotrophic, that is, it has moderate contamination and for point 3 it gave a value of 2.61 verifying an α-mesotrophic state that indicates strong contamination. Therefore, in this study, diatoms are related to the river water quality index, since while the parameters mentioned above vary, they will increase or decrease considerably; but in turn there will be climatic factors that alter the study, such as the rainfall that altered the chlorophyll level at point 1 during the month of December.

• Үндсэн зохиолч: Gallegos Martínez, Diana Carolina (author)
• Бусад зохиолчид: Vilela Muñoz, Cinthia Jamileth (author)
• Формат: bachelorThesis
• Хэл сонгох: spa
• Хэвлэсэн: 2021
• Нөхцлүүд: BIOINDICADORES; CONTAMINACIÓN; DIATOMEAS; MEDIO AMBIENTE
• Онлайн хандалт: http://repositorio.utc.edu.ec/handle/27000/10617