Commensalism
Commensalism is a type of symbiotic relationship that benefits one party and has little to no effect on the other. An example of a commensalistic relationship in Sumatra is the Sumatran Tiger and a variety of bacteria that live in its anus. The bacteria feeds on nutrients left in the feces of the tiger. The tiger has less opportunities to hunt Orang-utans after the earthquake, leading to less energy relayed to the bacteria.