Habitat Corridor Restoration Simulator

Restoration Techniques

Corridor connectivity 30%

Patch area expansion 1.0×

Click a habitat patch on the map to trigger a keystone-species reintroduction pulse there.

Landscape Status

Biodiversity index

Recovered patches

0 / 16

Active corridors

0 / 24

Elapsed time

0.0 yr

How it works

This is a spatial version of the MacArthur–Wilson / Levins metapopulation model. Each of the 16 habitat patches carries a local species-richness state S_i, which relaxes toward a colonization–extinction balance:

dS_i/dt = c_i · (S_max − S_i)  −  e_i · S_i

c_i = c0 · (1 + corridor_bonus_i)   — colonization rate rises with
                                        the number of active corridors
                                        linking patch i to its neighbours
e_i = e0 / A_i                       — extinction rate falls as the
                                        patch's restored area A_i grows

Corridor connectivity — activates the shortest landscape edges first (a minimum-spanning-style rollout), each active corridor lowers a patch's effective isolation and raises c_i, mirroring how habitat corridors let species recolonize after local extinction.
Patch area expansion — scales every A_i, directly cutting the extinction term e_i; bigger reserves hold larger, more resilient populations (species–area relationship).
Reintroduction pulse — an active technique: instantly adds species to a patch rather than waiting for passive colonization, useful when isolation is too high for natural recolonization.
Disturbance event — knocks a patch's S_i down sharply (fire, logging, drought) so you can compare how fast a well-connected, large-area landscape bounces back versus an isolated, small one.

The biodiversity index shown is the landscape-wide mean of S_i/S_max. Patch colour and canopy density on the map both track S_i directly — brown/bare means degraded, green/forested means recovered.

Degraded patch (low S) Recovered patch (high S) Active corridor

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