This is a complete unit on California's Integrated Segment 1- Ecosystem interactions.This unit is based around the phenomena of Declining Salmon Fall Runs in California's Central Valley. This is a complete unit with teacher instructions for 24 lessons, assessment rubrics, and a summative assessment.This unit focuses on the following topics: Population dynamics, Trophic Structure, Trophic Cascades, Human impact on Biodiversity, Climate Change, and Social Justice issues related to Human Impact on