PREDATOR · PREY — Trophic Cascade Simulator

PREDATOR◄►PREY TROPHIC CASCADE SIMULATOR v1.0

TICK 0 SEED — STABLE 1×

Simulation

Grass · producer

REGROWTH RATE0.0090

Chance/tick an empty cell sprouts. Below ~0.003 the meadow starves out.

GRASS ENERGY6.0

Energy a rabbit gains per tuft eaten.

Rabbits · herbivore

REPRO THRESHOLD22

METABOLISM0.24

Energy burned per tick. High metabolism = fast starvation.

VISION7

Cells scanned for grass — and for foxes to flee.

Foxes · predator

REPRO THRESHOLD42

METABOLISM0.32

RABBIT ENERGY20

Energy a fox gains per rabbit caught.

VISION11

Presets

Presets rewrite sliders live — the running world adapts, no reset.

Click any animal to track it. space run/pause · . step · r reset · g grid · v vision cones.

GRASS0

RABBITS0

FOXES0

—

energy—

age—

offspring—

meals—

state—

bare soil ripe grass rabbit (ring = well-fed) fox ▸ dashed line = hunt lock ▸ pale halo = fleeing

Population · time series

last 600 ticks peak —

Grass scaled to its own axis (light fill). Rabbit peaks lead fox peaks — the classic Lotka–Volterra quarter-phase lag.

Phase portrait

rabbits →↑ foxes

Closed loops = stable cycle. Inward spiral = damping. Line into a corner = collapse.

Vital statistics

rabbit mean energy	—
fox mean energy	—
grass cover	—
births · rabbit	0
births · fox	0
starved · rabbit	0
starved · fox	0
predated	0
cycle period (est.)	—
phase lag R→F	—
oscillation	warming up

View

Each agent is an autonomous forager: senses locally, moves greedily toward food with a random-walk fallback, pays a metabolic tax every tick, splits its energy in two when it breeds, and dies at zero. Nothing global schedules the boom or the bust — the cycle is emergent.