It is in fact an orderly community. The green plants are food for the plant eaters, which are food for the predators, and some of those predators are food for still other predators. And what's left over is food for the scavengers, who return to the earth nutrients needed by the green plants. It's a system that has worked magnificently for billions of years. Filmmakers understandably love footage of gore and battle, but any naturalist will tell you that the species are not in any sense at war with one another. The gazelle and lion are enemies only in the minds of the Takers. The lion that comes across a herd of gazelles doesn't massacre them as an enemy would. It kills one, not to satisfy its hatred of gazelles but to satisfy its hunger, and once it has made its kill the gazelles are perfectly content to go on grazing with the lion in the midst.