Late Cretaceous and Tertiary vegetation history of Africa

摘要: Twenty-five years have elapsed since Moreau (1952) completed his outstanding essay, ‘Africa the Mesozoic: with particular reference to certain biological problems’. This valuable synthesis resulted from interest in a major problem raised by avifaunas. They reveal great differences between four principal habitats of continent: arid regions, savanna, lowland evergreen forest, and montane forest. Since two or more these ecosystems regularly are contiguous over wide areas, coexistence distinct avifaunas them for long period time requires explanation, as does existence different vegetation zones themselves.