Tree diversity in coffee plantations in San Vicente Yogondoy, Pochutla, Oaxaca, Mexico

The investigation on tree diversity was carried out in the town of San Vicente Yogondoy, Pochutla, Oaxaca, Mexico. This town is known for its coffee production related to 65 shade tree species. The aim of the investigation was to learn and measure the richness of the diversity of trees in coffee agro ecosystems. Another aim was to generate information on the utility of these systems as water basins, biodiversity reservoirs, lumber, income and food for the population, and others. For this purpose, we identified and measured trees in 10m2 quadrants in a total of 17 organic coffee plots out of a total of (40%) selected at random. The altitudinal gradient in which the plots are located is between1 000 to 1 700 meters above sea level. The families botanics with the greatest predominance in the coffee plots are Fabaceae, Tiliacae, Euphorbiaceae, Ulmaceae, Lauraceae, Clethraceae and Fagaceae. Likewise, to determine the diversity in detail, three indices were created, namely: the Margalef biodiversity index, the Simpson dominance index, and the Berger-Parker abundance index.   The indices show a medium level of tree diversity, with a Margalef index of 3 on a scale of 5. We recommend taking advantage of the margin to increase the biodiversity in the coffee plantations by planting species for various purposes, including food.