In Mexico, National Parks, Wildlife Refuges, and Biosphere Reserves are known generically as Natural Protected Areas (NPAs).Currently, NPAs in Mexico constitute about 13% of the national territory.Each one has valuable natural resources.Contradictions happen in many of them happen and / or are subjected to multiple pressures of various kinds by different uses.The responsible authorities for managing the National System of NPAs, are required to make delicate decisions daily.The best way to support such decisions is by the results of scientific research.Therefore, research should be developed and directed to practical applications for managing them.