Another study conducted by Chapman and his colleagues in 2000 showed that many species of primates returned and came back to their original densities in lightly logged forest but in the heavily logged forest primates species were not able to recover. This study helps support that Kibale National Forest needs to develop a light logging system different from their heavily logging system they conduct now. Degraded agricultural lands effect on primates Degraded lands occur when land is cleared for agriculture and then abandoned after a few years. These lands are coming back at different rates and some are showing no possibility of re-growth. The effect these lands have on primates is still slightly unknown but some studies have started weeding out answers. One study found that most species of primates were found evenly distributed throughout the entire forest, whether there was agriculture encroachment or not. Diet of primates in Kibale National Park Different species have different diets and many of the species are folivorous. One study actually found that black-and-white colobus monkeys (Colobus guereza) eat younger leaves over older leaves (this is thought to happen because the leaves have more protein and are easier to digest). Flora There are approximately 229 species of trees found within the moist tropical forests of the park. Some endangered timber species of trees include Cordia millenii, Entandrophragma angolense, and Lovoa swynnertonnii. The forest understory is dominated by shade-tolerant shrubs and herbs, which include Palisota schweinfurthii and Pollia condensata, in addition to ferns and broad leaf grasses. Forest management Forestry research in the park Many studies have been conducted within the park to assess the factors influencing forest regeneration and forest management techniques. One such study's results suggested that forest restoration could be achieved through preventing fires within the park and allowing natural succession to occur so that the grasslands formed due to human activity could naturally regenerate to forests. The results showed that plots within the park that had the longest history of fire exclusion had the highest species diversity of trees. Furthermore, species of trees that required animal dispersal of their seeds were far more abundant than non-animal dispersed species in the plot with the longest duration of fire exclusion. This suggests that seed dispersing animals were also more abundant in areas where fire was excluded. Lastly, the presence of seed dispersers and animal dispersed species of trees in some grassland plots suggest