This is because the cellular processes are themselves reliant on the organisms, populations, communities and ecosystems of which they form part.
(This; is; because the cellular processes are themselves reliant on the organisms, populations, communities and ecosystems) (the cellular processes; are; themselves reliant on the organisms, populations, communities and ecosystems) (they; form; part)
This the cellular processes they
is are form
because the cellular processes are themselves reliant on the organisms, populations, communities and ecosystems
themselves reliant on the organisms, populations, communities and ecosystems
part