It is fairly clear that predators tend to lower the survival and fecundity of their <answer>prey</answer>, but on a higher level of organization, populations of predator and <answer>prey</answer> species also interact. It is obvious that predators depend on <answer>prey</answer> for survival, and this is reflected in predator populations being affected by changes in <answer>prey</answer> populations. It is not so obvious, however, that predators affect <answer>prey</answer> populations. Eating a <answer>prey</answer> organism may simply make room for another if the <answer>prey</answer> population is approaching its carrying capacity.
What do predators depend on for survival?
prey