An interesting bit on the increasing size of marine reserves. Though these mega-reserves comprise only a fraction of the total number of reserves, they actually account for most of the area (power law distribution of reserve size?). This can only be a good thing. My only concern, though, is that the size of a reserve is a function of, and naturally limited by the size of the oceanic zone of the nation implementing it. Smaller nations tend to be the ones with the most critical needs regarding marine conservation, for both biodiversity and economic reasons. I wonder what the distribution of impact per unit area looks like? These giant reserves serve many if they act as sources of refuge and replenishment, but they won’t be as effective if they do not cover, geographically or biogeographically, regions of high impact but low potential for large reserves.