As MPAs are designated around the world, keeping track of their locations and what they're protecting becomes increasingly necessary. In order for resource managers to analyze the breadth or effectiveness of a collection of MPAs, they need to know what is already in place.
This is easier said than done. In regions where MPAs have been designated under a variety of regulatory regimes, tracking down all of them can be a painstaking process. Even defining what is meant by "marine protected area" -- and, therefore, what will be included in the inventory -- can be tricky. This month, MPA News examines efforts by two countries to create national MPA inventories, and describes how they are facing the challenges involved.