The term digit is often used to represent a number in a specific position in a larger number, or in a number with a fraction expressed using a radix point.
The precipitation of the Andes Mountain climate changes but not drastically between two places. In Colombia there is a lot of rainfall all year round. In Ecuador there is the desert climate without much rainfall. Peru is simalar to Ecuador.
Vegetation-riparian vegetation directly affects dissolved oxygen by releasing oxygen into the water during photosynthesis. It indirectly affects dissolved oxygen concentrations because vegetation shading a stream may decrease water temperatures and as temperature decreases dissolved oxygen increases.