Ebook Description :

Succession how do ecosystems develop over time why on may 18 1980 mount st helens in the state of washington erupted with the force of a hydrogen bomb the volcano had been dormant for over 120 years but now 57 people were dead and forests and lakes were totally destroyed including nearby spirit lake which became a mud hole the blast leveled trees in areas over 10 miles from the . Model 1 primary succession barren rock from beneath a retreating glacier or due to a volcanic eruption low growing plants such as mosses ferns and lichens begin to colonize fast growing grasses flow ering plants and small shrubs begin to take root a thin layer of soil develops. Succession is the orderly process of an ecosystem changing over time and are predictable usually going from simple to complex why does succession occur the physical environment changes because hardly anything ever stays the same as environments evolve and become more stable. Biodiversity the number of living organisms and the biomass of an ecosystem tend to increase as the succession progresses and stabilize when the climax stage is reached