Ecological succession is the process through which ecosystems change and develop over time, involving a series of progressive stages. It typically begins with pioneer species colonizing a barren or disturbed area, followed by intermediate species that gradually replace them as conditions improve. This can lead to a climax community, which is a stable and mature ecological state. Succession can be primary, occurring on previously uninhabited land, or secondary, occurring in areas where an ecosystem has been disturbed but soil and some organisms remain.
Its not possible for your ear to turn different colors, its elogical.
Via natural selection, through the reproductive pressures exerted on living things, for genetic continuity of progeny, by both dynamic and semi-static forces, including but not limited to all of the life forms in a direct environment, and collectively via the interactions of each local life web, influencing a dynamic upon the whole of the life system.