Evaluación del estado trófico del sistema lacustre anteojos zona de Patzarumi del parque nacional Llanganates

Abstract

The aim of the current research was to evaluate the trophic state of the Anteojos lake system, located in the Patzarumi area, belonging to the Llanganates National Park by using the Standard Methods for the Examination of Water and Wastewater.10200 H. Chlorophyll. This was carried out in two sampling campaigns and 4 points selected at "discretion" in the Laguna de Anteojos 1 and 2, applying the protocol established by the INEN 2169 and 2176 Ecuadorian Technical Standard. Parameters like hydrogen potential (pH), dissolved oxygen (DO), conductivity and temperature were measured in situ. Then, the samples were taken to the laboratory belonging to the Development for the Environment and Climate Change Research Group where the concentrations of phosphates, nitrates and chlorophyll "a" were analyzed. With the results obtained, the statistical analysis of the data was carried out using Excel version Microsoft Office Professional Plus 2019 programs and Minitab Statistical Software. It is concluded that the Laguna de Anteojos 1 presents an oligotrophic state and the Laguna de Anteojos 2 a mesotrophic state. The correlation of the physicochemical parameters regarding chlorophyll "a" is low negative for conductivity, pH, DO and phosphates and moderate positive for temperature and nitrates. Finally, the physicochemical parameters analyzed in the lake system revealed that pH and DO variables are out of range for agricultural use, livestock and secondary-contact recreational purposes, as well as preservation of flora and fauna in cold freshwater established in the Ecuadorian environmental regulations; temperature is within the range established for páramo lagoons; conductivity indicates that the lagoons have pure water; and nitrates are within the permissible range for livestock use. It is recommended to use satellite information systems for this type of study, in order to confirm the results obtained.