Ecosystems in Action presents specific ecosystems that exist within broad biomes and a concrete picture of the diversity and interdependence of specific organisms living there. Illustrating not only how each ecosystem works in its pristine, balanced state, this series further shows how human interaction has changed, and often endangered, them. Support the national science education standards Unifying Concepts and Processes: Systems, Order, and Organization; Unifying Concepts and Processes: Evidence, Models, and Explanation; Unifying Concepts and Processes: Constancy, Change, and Measurement; Unifying Concepts and Processes: Evolution and Equilibrium; Unifying Concepts and Processes: Form and Function; Life Science; and Science in Personal and Social Perspectives as outlined by the National Academics of science and endorsed by the National Science Teachers Association.