Run advances to the next 100-step mark. Step advances once.
These are simplified webs, not complete accounts of each region. Species and diets vary by place, season, and life stage. Plant abundance represents food resources such as leaves, fruit, and seeds. Changes in the artwork illustrate abundance; depth and motion are decorative, not simulated animal behaviour. Use Motion on/off to freeze the scene. Reduced-motion preferences are respected; motion stops offscreen, in background tabs, and while you inspect an earlier step.
Resource controls alter the producers’ carrying capacity. “Rainfall” and “nutrient supply” are teaching controls, not calibrated climate or chemical measurements. A model step is not a real day.
Experiments save separately for each ecosystem in this browser. Changing a preset starts a new run; your kept comparison stays. CSV and experiment downloads let you keep a separate record. No information is sent to a server. For guided questions, open the full EcoGEM learning experience, or read the teacher guide.
Relative abundance in model units, not counts of real organisms.
Enable JavaScript to run the lab. You can still read the project page and original credits.