Part 8: The Interactions of Life: Ecology Tutorials Chapter 51. What factors affect animal population growth? Chapter 52. Why do some communities have more species than others? Chapter 53. How does energy flow through an ecosystem? Chapter 54. What is a biome and where are they located worldwide? Chapter 55. What causes global warming, and what are the potential consequences?   Simulation How is energy balance maintained in the feeding relationship within an ecosystem? Copyright ©2002 Thomson Learning, Inc.