The Calakmul Conservation Fund makes payments for environmental services to two ejidos [a unique land tenure system dating to the Mexican Revolution] of the Calakmul Biosphere Reserve (Pustunich and Yohaltún) that conserve their forests. With the support of Amigos de Calakmul, since 2021 payments are channeled through the Mexican Forestry Fund of the National Forestry Commission (CONAFOR, Spanish acronym), which adds a copayment so that the resources reach the communities directly in a single deposit. In 2022, Amigos de Calakmul carried out the monitoring of forest cover in both ejidos, an analysis that showed that the forest areas under the payment for environmental services scheme do not present changes in their forest cover figures.