Primary succession is ecological succession that begins in essentially lifeless areas, such as regions in which there is no soil or where the soil is incapable of sustaining life (because of recent lava flows, newly formed sand dunes, or rocks left from a retreating glacier).
<span>The Zoocholrellae and p. bursaria have a mutual symbiotic relationship. Zoocholrellae are the algae that the p. bursaria live in. The p. bursaria gives Zoocholrellae food while the Zoocholrellae help and allow for the p. bursaria to perform locomotion and move around.</span>
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