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Tropics are a larger proportion of

10-fold change in area =

High latitude ecosystems are

These high latitude ecosystems have undergone repeated re-colonisation after

There has been more time for speciation in tropics however

In the history of the Earth, there was more land in the

Higher productivity can support more

High temperatures in the tropics led to :

Climate envelope is the range of climatic conditions that a species is found in

Conditions species experiences in tropics are