The relatively stable community at the end of succession is called a climax community 1. Climax community is thought to be in equilibrium with the environment 2. Climax varies depending on the local conditions 4. Primary succession A. Primary succession occurs when plants become established on land completely devoid of soil and vegetation 1. Soil is that portion of the earth's surface consisting of disintegrated rock and organic materials or humus.
Primary succession is the development of soils.
The plant communities will generally change as the soil develops. The grassland is replaced by a shrub community e. shrub community may be replaced by a forest 2. Each stage alters the habitat in such a way that it prepares the way for the next invasion of species 3. As succession proceeds, soil is formed and thickens - the result of decomposition 4. When the changes in the composition of plants stop and the plant community remains generally the same for many years, the community is mature or at climax.