There is also some concern that the protected area networks (PANs) established by the Namibian government are heavily skewed towards the Namib Desert biome, and do not fully represent all of Namibia’s terrestrial ecosystems. While the biome is important, there are other biomes, such as savannas, woodlands, and the "Succulent Karoo" biome that are often underrepresented. In an analysis of endemism patterns in Namibia, Simmons et al. (1998) also found the Succulent Karoo and the Kaoko Escarpment to be needing protection. As of 1998, the Namib Desert constituted 69% of the PANs, while the savanna and woodlands only constituted 7.5% and 8.4%, respectively. The Succulent Karoo biome only represented 1.6% of the protected areas.