1. Primary succession occurs on sites that did not previously support a plant cover.
2. Secondary succession occurs on sites that previously supported a plant cover, and some remains and "legacies" of that plant cover persist at the site.
3. Autogenic mechanisms of succession are changes in the environment caused by the j plants themselves which drive or trigger successional change.
4. Allogenic mechanisms of succession are changes in the environment caused by physical processes which are relatively independent of the vegetation itself.
5. Biogenic, mechanisms of succession refer to a sudden change in the biota which has . a major influence on succession (e.g., introduction of a plant disease which removes a 'major plant species, introduction of an herbivore which significantly affects plant populations).
6. A sere is a sequence of plant communities that develop over the course of succession: seral stages are sometimes recognized. Sere is the "product" of succession whereas the term 'succession" is usually used to refer to the process of the change.
francis1897 answered the question on February 27, 2023 at 12:56
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