What happens if there is a change in one part of the Ecozone and why this change occurs

The distribution of plants and animals are changed.

Explanation:

If there is a change occur in one part of the Ecozone so the animals and plants present in that ecozone migrated or die if there is no tolerance present in it. Change in ecozone occur due to climate change around the world. Due to global warming, the climate of ecozone changes which is not suitable for the animals and plants living in that ecozones so they migrated to other suitable regions and only those plants and animals survive which have tolerance in their body against that change.