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Eventually trees and shrubs sprout. And animals such as deer arrive.
Weeds and grasses grow in the thin soil. And insects arrive into ecosystem.
A natural disaster such as a tornado occurs. killing plant and animal life.
There is now a working ecosystem complete with food webs and plants.
Eventually plant and animals return to the grounds.
The first phase of succession takes place after a volcanic eruption, the ground surface turns to ash and rock.
After the volcanic eruption, the first organisms to appear are lichens and moss. New soil is also formed with these plants.
Succession is the series of changes that occur in an area where no ecosystem previously existed. Such an area might be a new island formed by eruption of an undersea volcano.
Succession may lead to a community of organisms in equilibrium , which does not change drastically unless the ecosystem is disturbed.