How might biodiversity an ecosystem recover from a volcanic eruption?

Biodiversity includes divers population of plants and animals. After volcanic temperature and molted lava. When eruption subsides and the lava cools down, vegetation stars reappearing. First of all lichens and microscopic plants and thereafter macroscopic plants and animals also take shelter here. Thus among divers population of plants and animals, those forms which can withstand the prevailing conditions reappear and in a long run the whole ecosystem recovers.

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