in three as short as possible sentences, construct an argument that shows why lichens are necessary to establish a new ecosystem after an extreme disturbance

Lichens are the first organisms to colonize harsh, barren environments, making them essential pioneers in ecosystem establishment.

They help stabilize soil by fixing nitrogen and breaking down rock, aiding in the creation of a hospitable environment for other plants and organisms to thrive.

Their ability to photosynthesize and produce organic matter provides a source of food for more complex organisms, kickstarting the food chain in the new ecosystem.