Ecological Succession. Succession : when old populations in an ecosystem are gradually replaced by new populations. This is a predictable change. Succession can be from a natural disaster or human activity.
Succession: when old populations in an ecosystem are gradually replaced by new populations.
1. Primary Succession – occurs where no soil exists (rock & ash) …newly exposed surfaces.
Pioneer species: 1st species to occupy an area.
Ex – lichens (fungus & algae)
2. Secondary Succession -restarts succession at a different point than that which occurs with primary succession.
Succession proceeds at a quicker pace during secondary succession since soil is already pre-formed and ready for use by plants.
One in which the populations of all organisms are in balance w/ each other & existing abiotic factors.