We report on the damaged and not-damaged conditions after the 2006 tsunami, especially vegetation and the demographics of the long-tailed macaque and silver leaf monkey populations, before and after the 1996-98 observations conducted in the Pananjung Pangandaran Nature Reserve (NR). The NR and its fringe consist of a sandbar and an island. The sandbar is mainly a tourist resort and the island contains a public-use zone and a Nature Reserve proper. The sandbar area suffered heavily from the tsunami and was still in disarray in August 2008 when we visited. On the other hand, the island was impacted much less than the sandbar area by the tsunami. The population of long-tailed macaques decreased compared to the density of 1996-98. This is probably caused largely by human disturbance after the economic crisis spread over all Indonesia. As compared with this species, the population of silver leaf monkey maintained almost the same density as what we observed in 1996-98. The colobine monkeys, a leaf-eating species, appear to be a good example of constant hyperabundant biomass.

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