Representation of the sampling units in La Malinche National Park, in a bidimensional space of characters, with a Principal Component Analysis. Sampling units (SUs) from 1 to 8 are grouped (inside rectangles) according to the spatiotemporal frequency of edible mushrooms growing in each one. Principal Component (PC) 1 versus PC 2. The first two Principal Components explain cumulatively 44.9% of data variation.