Biodiversity and WORLDMAP.
It's often cited that the Amazon, and sometimes the Borneo and other Asian rainforests, are the most 'bio-diverse in the world'. For it's size, Ecuador has absurdly high biodiversity, as the above map seems to indicate, because of it's diversity as well.
Not that it matters, the African rainforests are still extremely important and bio-diverse, but it seems the Amazon and SE Asian forests edge it out.
More importantly, they seem at a greater risk than the African forests. In fact, Borneo and Sumatra seem the MOST vulnerable. Indo-China is already a lost cause, for the most part. Recently the Javan rhinocerous became extinct in Vietnam.