That humans originated from Africa is well-known. However, this is widely regarded as a chance outcome, dependant simply on where our common ancestor shared the land with where the great apes lived. This volume builds on from the 'Out of Africa' theory, and takes the view that it is only in Africa that the evolutionary transitions from a forest-inhabiting frugivore to savanna-dwelling meat-eater could have occurred. This book argues that the ecological circumstances that shaped these transitions are exclusive to Africa. It describes distinctive features of the ecology of Africa, with emphasis on savanna grasslands, and relates them to the evolutionary transitions linking early ape-men to modern humans. It shows how physical features of the continent, especially those derived from plate tectonics, set the foundations. This volume adequately conveys that we are here because of the distinctive features of the ecology of Africa.
Part I: The Physical Cradle: Land Forms, Geology, Climate, Hydrology and Soils
Chapter 1. High Africa: Eroding Surfaces
Chapter 2. Climate: Rainfall Seasonality
Chapter 3. Water in Rivers, Lakes and Wetlands
Chapter 4. Bedrock Geology: Volcanic Influences
Chapter 5. Soils: Foundations of Fertility
Part I: Synthesis: Structure of the Physical Cradle
Part II: The Savanna Garden: Grassy Vegetation and Plant Dynamics
Chapter 6. Forms of Savanna: From Woodland to Grassland
Chapter 7. How Trees and Grasses Grow and Compete
Chapter 8. Plant Demography and Dynamics: Fire Traps
Chapter 9. Paleo-savannas: Expanding Grasslands
Part II: Synthesis: Savanna Structure and Dynamics
Part III: The Big Mammal Menagerie: Herbivores, Carnivores and Their Ecosystem Impacts
Chapter 10. Niche Distinctions: Resources Versus Risks
Chapter 11. Big Fierce Carnivores: Hunting Versus Scavenging
Chapter 12. Herbivore Abundance: Bottom-up and Top-down Influences
Chapter 13. How Large Herbivores Transform Savanna Ecosystems
Chapter 14. Paleo-faunas: Rise and Fall of the Biggest Grazers
Part III: Synthesis: Movers of Savanna Dynamics: Grazers, Elephants and Fires
Part IV: Evolutionary Transitions: From Primate Ancestors to Modern Humans
Chapter 15. Primate Predecessors: From Trees to Ground
Chapter 16. Primate Ecology: From Forests into Savannas
Chapter 17. How an Ape Became a Hunter
Chapter 18. Cultural Evolution: From Tools to Art and Genes
Chapter 19. Reticulate Evolution Through Turbulent Times
Chapter 20. Prospects For a Lonely Planet
Appendix: Scientific Names of Extant Animal and Plant Species Mentioned