Although farmers do not receive any support from society for the contribution of the dehesa to welfare of society and the environment, they still conserve, prune and reforest oaks to maintain fruit production to feed and fatten Iberian pigs during the montanera or pannage. The ability of the Iberian pig breed to feed on acorns is a key feature in maintaining the dehesa. Despite the pivotal role that the dehesa plays in biodiversity conservation and human welfare in the Iberian Peninsula, quantitative and qualitative information about the ecology and productivity of this Mediterranean agrosilvopastoral system is scarce. In the absence of documented evidence of the biological value.
