This ecosystem has very few plants and a limited number of animals species. what two non-living factors limit the plants and animals that live here?

you're crazy : )

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!