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PolskiPopulation Migration Simulation (2D)
A metapopulation model: six habitat patches with logistic growth, diffusive migration between neighbors, and random local extinctions — watch when migration rescues a crashed patch and when it doesn't.
This 2D companion replaces the original page's decorative reinforcement-learning dashboard with a real metapopulation model: six habitat patches grow logistically toward their own carrying capacity, exchange individuals diffusively with their ring neighbors, and occasionally suffer a random local extinction. At low migration rates a crashed patch stays empty; raise the migration slider and neighboring patches recolonize it — the rescue effect from population ecology, made directly visible instead of implied.
2D metapopulation lab with per-patch logistic growth, diffusive migration between ring neighbors, and stochastic local-extinction events, showing when migration rescues a crashed patch.
2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install
In metapopulation ecology, a habitat patch that suffers a local extinction can be recolonized by migrants arriving from neighboring occupied patches. Whether that happens depends on the migration rate relative to how far the patch's population fell — exactly what the migration-rate slider controls here.
The habitat-variability slider randomizes each patch's carrying capacity to model unequal habitat quality — richer patches can act as "source" populations that export migrants to poorer "sink" patches.
Each patch then evolves independently under pure logistic growth. A patch hit by a catastrophe stays near zero forever, since nothing replenishes it — a useful contrast with the migration-enabled case.