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Biodiversity isn't just a headcount — it's a network of feeding relationships that holds an ecosystem's populations in balance. This simulator runs a three-level food web (plants, herbivores, predators) forward through time using coupled growth/predation equations, so you can watch what a real trophic cascade looks like: raise hunting pressure on the top predator and see the shockwave travel down the chain — predators collapse, herbivores irrupt, and overgrazed plant biomass crashes, exactly as it did when wolves were removed from Yellowstone or apex predators were fished out of a reef.