Many, many animals do also. Tigers inform each other of their whereabouts through complex scent markings that contain pheromones, and they violently defend their territory. The American black bear does so similarly. Male mice are territorial and do not tolerate unfamiliar males within their home range. Many lizards are territorial. Fish territories are generally ruled by a single individual or breeding pairs. Active root segregation and the defence of space by plants indicates that plants are probably also territorial. So "the concept" of land ownership is not remotely a uniquely human trait.
Many, many animals do also. Tigers inform each other of their whereabouts through complex scent markings that contain pheromones, and they violently defend their territory. The American black bear does so similarly. Male mice are territorial and do not tolerate unfamiliar males within their home range. Many lizards are territorial. Fish territories are generally ruled by a single individual or breeding pairs. Active root segregation and the defence of space by plants indicates that plants are probably also territorial. So "the concept" of land ownership is not remotely a uniquely human trait.