Fig. 8.3a. The SLOSS debate centred on the relative merits of a single large reserve (Fig 8.3a) versus several small reserves (Fig. 8.3b). Smaller reserves are better able to achieve representation of all habitat types, which can be seen in this overlay of ecodistricts from the National Ecological Framework. However, a single large reserve is more likely to maintain ecological function and retain all ecosystem components. The total area of protection is the same in both maps.