This classic introductory text offers a balanced survey of ecology. It is best known for its vivid examples from natural history, comprehensive coverage of evolution and quantitative approach. Due to popular demand, this Fifth Edition Data Analysis Update brings twelve new data analysis modules that introduce students to ecological data and quantitative methods used by ecologists. Table of Contents 1. Ecology: The Study of Nature I. LIFE AND THE PHYSICAL ENVIRONMENT 2. The Physical Environment 3. Adaptation to Aquatic and Terrestrial Environments 4. Variations in the Physical Environment 5. Biological Communities: The Biome Concept II. ECOSYSTEMS 6. Energy in the Ecosystem 7. Pathways of Elements in the Ecosystem 8. Nutrient Regeneration in Terrestrial and Aquatic Ecosystems III. ORGANISMS 9. Adaptations to Life in Varying Environments 10. Life Histories and Evolutionary Fitness 11. Sex and Evolution 12. Family, Society, and Evolution IV. POPULATIONS 13. Population Structures 14. Population Growth and Regulation 15. Temporal and Spatial Dynamics of Populations 16. Population Genetics and Evolution V. SPECIES INTERACTIONS 17. Relationships Among Species 18. Competition 19. Predation 20. Evolution Responses and Coevolution VI. COMMUNITIES 21. Community Structure 22. Community Development 23. Biodiversity 24. History and Biogeography VII. ECOLO