3 ms·
In a natural ecosystem, nothing is taken out, whereas in this one, food is supposed to be removed from the system, making inputs necessary.
by jfoucher 9y ago
In a natural ecosystem, nothing is taken out, whereas in this one, food is supposed to be removed from the system, making inputs necessary.
- bluGill 9y agoSunlight and air are inputs though. Most of what you take our of the system comes from changing H2O and CO2 from the air into a different form using energy from the sun. There is the potential various micro nutrients, and minerals. However the vast majority of what the system needs is air and sunlight.
- weberc2 9y agoRight, but nutrients and minerals are still being regularly removed from the system--they need to be put back in order for the system to function. Their mass relative to the mass of other inputs doesn't change the calculus.