Determinación del índice trófico de la calidad de agua a partir de la presencia de diatomeas epilíticas en el río Cutuchi, sector Lasso, cantón Latacunga

The research project aims to determine water quality based on the presence of epilitic diatoms in the Cutuchi River, located in the Lasso sector with UTM coordinates,the latitude: 0765609; length: 9912342; altitude: 2941msnm. There are industries near the Cutuchi River NOVACERO, INDULAC, and SAFESA. It presents good quality land suitable for agriculture and cattle raising. Epithelial diatoms are bioindicator microorganisms that allow the determination of water quality. These provide information on the biological integrity of an aquatic system by its rapid response to changes in environmental conditions. Diatoms are sensitive to the presence of contaminants, so the size of their populations are inversely proportional to the levels of contamination. For the collection of samples of epilitic diatoms were adapted the sampling methodology and observation of Eduardo Lobo. The taxonomic identification of each individual of the species was carried out with the aid of regional and local epilitic diatomic identification guides. The results indicate the presence of 53 species, 21 families of epilitic diatoms. The most representative species were Nitzschi incospicua 38,9% specimens total family: Bacillariaceae; Navicula erifuga, family: Bacillariaceae; Navicula erifuga 11,9%,family: Naviculaceae; Achnanthidium straubiamum 5,5%, family: Achnanthaceae; Brachysira microcephala 5,1%, family: Brachysiraceae. In the application of the index of diversity of Shannon the past software, puts on the name of the species and the number of individuals that it presents each an. Obtaining an relative abundance of 2.78 nits/ind unit of natural logarithm. The evaluations of the trophic state of the water was carried out based on the content of the phosphorus parameter of 1.86 mg/l (1860 mg/m3), represented in the formula of Carlson (1997), modified By SEK International University (2012) using a scale between 0 and 100, is oligotrophic to hypertrophic. To determine the grade of eutrophication indicating the amount of nutrients contained in the water.

• Autor principal: Lucero Morales, Mercedes Maribel (author)
• Altres autors: Paredes Alvarez, Monserrath del Carmen (author)
• Format: bachelorThesis
• Idioma: spa
• Publicat: 2017
• Matèries: INGENIERÍA EN MEDIO AMBIENTE; CALIDAD D EL AGUA; DIATOMEAS EPILICAS; RIO CUTUCHI
• Accés en línia: http://repositorio.utc.edu.ec/handle/27000/4206