As climate change takes hold, the world's climatic regions will change their positions. Hot climates will expand from the Tropics, temperate climates will extend towards the poles and up mountainsides, and arctic climates will contract.
As most, if not all, animals and plants are sensitive to climatic conditions, they will naturally tend to migrate or come under pressure as these regions change.
I've been aware for a while now of various reports that the world's plants were even now in the process of extending/contracting their range. Now, numerous studies from around the world have been pulled together to form a global picture of what's actually going on (See here for a summary).
It makes quite worrying reading: Basically, changes do seem to be happening, further underlining the belief that climate change is already here.
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