🌿 3D Biodiversity Monitoring — Trophic Ecosystem Simulator

The 2D original at this URL's twin was a decorative template — its "simulation" was a placeholder div with the text "will be added later" and no working JavaScript. This 3D companion builds the real mechanic the title implies: a genuine three-trophic-level food chain, integrated with fourth-order Runge–Kutta (RK4) each frame from the coupled equations dP/dt = r·P·(1−P/K) − a₁·P·H (producer logistic growth minus grazing), dH/dt = e₁·a₁·P·H − a₂·H·C − m₁·H (herbivore grazing gain minus predation and death), and dC/dt = e₂·a₂·H·C − m₂·C (predator predation gain minus death) — the standard three-species Lotka–Volterra food-chain extension. Habitat Availability sets the producer carrying capacity K and the radius of the green habitat disc that populations are actually scattered within; Resource Distribution scales the producer growth rate and herbivore conversion efficiency, visibly tinting the terrain from barren brown to lush green; Predation Pressure sets the predator attack rate a₂ directly. The live readout panel reports each trophic population, the Shannon diversity index computed from their real proportions, and an ecosystem-health score — plus a warning when a trophic level is collapsing toward extinction.