Re: Savannah and Grassland

Rick Cook (
13 Oct 1995 09:32:01 GMT

Harry Erwin wrote:
> Homo is the keystone because the alternative
>source of fire (lightning- caused) is rare in temperate grassland and
>unknown in tropical savannah.
There are other species which can be keystones for this process, notably
browsers such as elephants. I understand that the elephants, giraffes and
other browsers have a lot to do with maintaining the African veldt.