· Scale/extent: size of the disturbed area · Intensity: measure of the strength of the disturbance · Frequency: how many disturbances per unit time
-Succession is the predictable changes in species composition after an environmental disturbance.
What is primary succession?
-Succession that starts with bare ground without previous inhabitants--no seed bank, no diapausing insects, etc...This might include glacial retreat revealing new ground; a volcanic eruption creating new land or destroying everything in an area.
What is secondary succession?
-Succession in a Community where the previous community or climax community has been removed. This can include human disturbance, or disturbance from fires, floods, severe storms, etc... -Regeneration following a disturbance: remove vegetation, not the soil.
What is autogenic succession?
-Succession based on biotic modification of the environment.
What is allogenic succession?
-Changes in species composition associated with abiotic changes in the environment, such as global drying or warming trends that change an area's vegetation.