the action od cillia
being enveloped in additional mucus and swallowed into the stomach, where they are exposed to acidic digestive juices that can destroy them.
the reflex of coughing
Coughing
CO2
Yes, tokens created in Magic: The Gathering go to the graveyard when they are destroyed or removed from the battlefield.
you (most likely) die
Carbon dioxide.
When the producer or consumer or in fact anything in it dies out or is removed then the food chain is destroyed.
ablation
If Different Dimension Capsule is destroyed early or leaves the field, then its effect to add the removed card to hand will not work. The removed card will remain face-down and removed from the game.
tatti
In the case of nitrogen-fixating bacteria or other microorganisms living in symbiosis with plants, if plants are removed so too will the microorganisms.