🧪 Ecology Advanced Ocean Acidification Simulation

Rising atmospheric CO₂ doesn't just warm the planet — dissolved in seawater it forms carbonic acid, pulling down pH and the carbonate-ion saturation state (Ω) that shell-building plankton depend on. This simulation follows that chemistry through to its ecological consequence: a live 3D population of pteropods (aragonite-shelled "sea butterflies") whose shells visibly pit and dissolve once Ω drops below 1, a logistic population model that couples shell damage to survival, and a predator population of fish that depend on pteropods as food. Push CO₂ toward 1000 ppm and watch the biodiversity index — a combined measure of shell integrity, prey abundance and predator abundance — collapse in real time, exactly the cascade marine ecologists are already documenting in acidified upwelling zones.