Changes

: Some '''nature reserves''' are left completely alone by [[human]]s but other '''nature reserves''' require the input of [[human]]s to either protect [[population]]s which may be under threat from poaching or maintain the [[community]] by killing [[organism]]s considered to be pests.

: Some areas have lost their [[Apex Predator|apex predators]] which means some [[population]]s can grow too large. In these cases [[human]]s may [[cull]] the [[animal]]s to reduce the [[population]] preventing them from damaging the [[ecosystem]].