I think that the science departments take that particular species and they help them repopulate. They make a rule that you can not hunt the animals and other various things to keep them from dying out.
A keystone species is a species whose presence has a disproportionately large impact on its ecosystem compared to its abundance. If a keystone species is removed from its ecosystem, it can lead to significant changes in the ecosystem's structure and function.
germs
Normal species are species whose population levels are considered to be normal for their survival. For example: cattle, Sal, pine, rodents, etc.
Extinct Species: The species no longer present in its original range or as a distinct species elsewhere.
Density-independent factors
beaver and bison
A population of organisms that can reproduce fertile offspring is called as species
Endangered or Critically Endangered.
Endangered, or critically endangered.
Critically Endangered. Example: Amur leopard, around 35-50 in the wild.
a species whose numbers are so small that the species is at risk of extinction
population whose members can be predicted