Ah, trophic cascades and keystone species? It is when one creature, like your sea otter or wolf, holds the whole system together. But let me tell you, the vulture—that is the keystone species I have seen with my own eyes. When they disappeared from our skies here in Delhi, the feral dogs and rats multiplied, and we saw a terrible rise in rabies. So from my life as a health worker, I tell you, a keystone is not always a majestic animal; it can be an unloved scavenger whose absence becomes a public health crisis.
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