what effect does it have on community?
Apex predators affect prey species' population dynamics and populations of other predators, both in aquatic and in terrestrial ecosystems.
Apex predator
Apex predators affect prey species' population dynamics and populations of other predators, both in aquatic and in terrestrial ecosystems. 
in which evolutionary force does competition play the biggest role UNANSWERABLE what is apex predator? An apex predator, also known as an alpha predator or top predator, is a predator at the top of a food chain, without natural predators. how is it conserved? By reintroducing them to nature .
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Apex predator [SEP] Effects on community
Apex predators affect prey species' population dynamics and populations of other predators, both in aquatic and in terrestrial ecosystems. Non-native predatory fish, for instance, have sometimes devastated formerly dominant predators. A lake manipulation study found that when the non-native smallmouth bass was removed, lake trout, the suppressed native apex predator, diversified its prey selection and increased its trophic level. As a terrestrial example, the badger, an apex predator, predates on and also competes with the hedgehog, a mesopredator, for food such as insects, small mammals, reptiles, amphibians and the eggs of ground-nesting birds. Removal of badgers (in a trial investigating bovine tuberculosis) caused hedgehog densities to more than double.