Biosphere Reserves are territories distinguished by the uniqueness and conservation of their natural heritage in coexistence with the well-being and valorization of the cultural heritage associated with the resident communities.

Biosphere Reserves are nominated by national governments and distinguished by the Director-General of UNESCO within the framework of the Man and the Biosphere (MaB) Program, following the decisions of the MAB International Coordinating Council (MaB ICC).

Their status is internationally recognized.

The Biosphere Reserves are under national jurisdiction, but collaborate with each other in sharing ideas, experiences, projects and actions at regional, national and international level, in the context of the network of 784 Biosphere Reserves in 142 countries, including 25 transboundary Biosphere Reserves (Setembro 2025).

UNESCO’s Biosphere Reserves cover about 5% of the Earth’s land surface.

This collective endeavour covers an impressive 12% of the national territory and constitutes a remarkable 26% of the Protected and Classified Areas within Portugal. Notably, these Reserves are homes to 283,960 individuals, contributing to 3% of the entire Portuguese population.

These Reserves serve as guardians of Portugal’s invaluable cultural and natural heritage. They harbour a staggering 79.8% of the 99 habitats designated for mandatory preservation. This commitment to conservation and heritage preservation is at the core of the Reserves’ ethos.