The study area is located in the South of Mexico City. It is
a tropical high-altitude aquatic system located at 2240
masl, between 19°02 and 20°12' N and 98°28' and
99°32' W, covering an area of 1,479 km2. The average
annual temperature is 16°C, but the temperature fluctuates
greatly during the day with an average maximum of
25°C and minimum of 8°C. The rainy season mainly
occurs during the summer and autumn months (May to
October), while the rest of the year remains dry.