13.2 Biotic and Abiotic Factors KEY CONCEPT Every ecosystem includes both living and nonliving factors. Collect HW: 13.2 Pgs. # 402-404 5 Facts/Page
13.2 Biotic and Abiotic Factors Assessment 13.1 1. What are the five different levels of organization studied by ecologists? 2. Describe the three general methods used by ecologists to study organisms.
13.2 Biotic and Abiotic Factors An ecosystem includes both biotic and abiotic factors. • Biotic factors are living things. – Plants – Animals plants – Fungi – Bacteria – Protists
13.2 Biotic and Abiotic Factors • Abiotic factors are nonliving things. – moisture – temperature – wind sunlight – sunlight – soil moisture
13.2 Biotic and Abiotic Factors Changing one factor in an ecosystem can affect many other factors. • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities.
13.2 Biotic and Abiotic Factors • A keystone species is a species that has an unusually large effect on its ecosystem. keystone
13.2 Biotic and Abiotic Factors • Keystone species form and maintain a complex web of life. creation of wetland ecosystem increased waterfowl Population keystone species increased fish population nesting sites for birds Beaver Lodge Construction
13.2 Biotic and Abiotic Factors HW: 13.3 Pages # 406-407 5 F/P1. Biodiversity2. What does it mean when they say L.A. is diverse? Quiz next time!3. What is a keystone species?4. List three examples of how a beaver is a keystone species.5. What is the difference b/w biotic and abiotic?6. Sketch a beach and label a total of 10 abiotic and biotic examples.