Inter-species – within the species & what they compete over
Typically, when young male lions reach a certain age, they are forced from the pride. ... Young, inexperienced, and hungry, these young lions struggle with prey and compete with their former pride for food and territorial rights.
Intra-species – with other species & what they compete over
Leopards and lions can be competition, since both species feed on the same prey, and can be negatively impacted by the presence of the other because they will have less food.
Affect of invasive species
As human development and agriculture have expanded into lion habitat, more livestock are put into the paths of lions—which leads to retaliatory killings by people.