Population
The Orang-utan population has a slightly sparse random distribution in Sumatra. The birth rate was not affected by the disaster to much, but the death rate of the population raised considerably afterwards because of flooding, new areas with different predators, and decreased living space. The population went through exponential growth and reached carrying capacity long before the earthquake, and was in decline before as well, due to poaching. The Orang-utan has been considered Endangered, and an estimate of 30,000 still live in the wild, not limited to Sumatra.