Was Jurassic Park predominantly occupied by dinosaurs or brontosauruses? The latter - seen grazing in herds - seemed to dominate over the dinosaur population of the park.
I guess that by Dinosaurs and Brontosauruses (sic) you are differentiating between flesh eating and plant eating dinosaurs. I guess that, much as with mammals today, in, for example, the African savannah, there were relatively few flesh-eaters compared to the vast herds of herbivores, presumably for the same biological and ecological reasons