Each ecosystem is within a larger ecosystem susceptible to variable input and output: Instability: fluctuating tension

There can be a state of equilibrium (perfectly balanced tension) state but it won't be stable because the structure is not fixed.

- the input and output of influential forces is not permanent.

the continuation of a triangle (balanced natural process or ecosystem) beyond itself adds up to a circle: all open ecosystems are part of a larger closed cyclical ecosystem.