Need disambiguation about whether this is the mod Daisy World, or the thought experiment Daisy World that inspired the mod idea.
Biomes, temperature and rainfall change based on the amount of foliage and other things within a certain radius. Should be done per chunk or set of chunks? Not block by block. Also not very often. Also independently of specific current biomes; drought, flooding, etc. should spread to neighboring biomes.
Certain things like trees and mobs should not spawn or reproduce if they don’t belong in the new biome type.