An ecosystem brings together living things (animal and vegetable) and the environment in which they live and interact.
A food web (or trophic web) is the tying together of several food chains within the same ecosystem. In this web, one living thing eats another to assure its own survival.
For this reason, one can also characterize a trophic web by the passage of energy (matter) from one living thing to another according to a particular hierarchy. One thus makes the following distinctions:
Click on an element of the ecosystem to make it disappear.
Click on "Next Step" to simulate a possible long term consequence.