Read Every Interaction by Its Signs

You'll learnto name every species interaction by its pair of +/0/− signs.

A community is every species that shares a habitat, and the topic is one question asked many ways: how does each species affect the others? Four rules carry the exam weight — symbiosis is named by its signs, predation is a two-way loop, competition need not end in extinction, and energy flows one way while matter cycles. Ten short steps; press Next for each one.

10 STEPS · 6 QUICK CHECKS · SYMBIOSIS +/0/− · PREDATION = TWO-WAY LOOP · COMPETITION ≠ EXTINCTION · ENERGY = ONE-WAY · v4

read every interaction by its signs · and keep it two-sided

Before you start

What you're looking at

A community — a fox, a rabbit, grass, a bee and a flower — drawn as linked boxes in one habitat.

The question

How does each species affect the others, and how do you name each interaction?

Step 1 / 10