JaegerBane wrote...
Lemonwizard wrote...
However, the ecological niche of diseases in every environment is to reduce the population size of animals, preventing overpopulation that would deplete the ecosystem's natural resources.
Unless you're one of those Gaia tree-hugger nutters, no disease on earth exists for the purposes of holding populations in check. They have that effect, yes, but that's not why they're there. They're there because they evolved in an environment favourable to them.
Ultimately, there is no built-in trigger that ensures the Earth's carrying capacity is never exceeded. A sobering thought...
You don't know what a niche is, do you?
It's not why it's there, why it's there is because that was the method of survival that suited that species best in its evolution. A niche is the function it performs within an ecosystem now that it is there.
And while a niche is not the purpose for which a species evolved (because species don't actually evolve for purposes), and members of the same species can actually fill different niches if present in different environments, the removal of a species from an environment without other species present in appropriate numbers to continue filling that niche can have disastrous consequences for the ecosystem in question.
Remove a predator, its prey has a population explosion within a few generations, they consume more food than the environment can replenish, that prey and every other species in the environment that also depends on that food source starves.
Eliminating all disease, unless deployed at the same time as another technology that also produced enough extra food to account for the increase in population size of every animal which otherwise would have suffered from affliction by that disease (or culling their numbers by more conventional methods), would completely fu
ck up every ecosystem there is.