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Lesson 1: Biodiversity TEK: 7.10 (A) (B) (10) Organisms and environments. The student knows that there is a relationship between organisms and the environment. The student is expected to: (A) observe and describe how different environments, including microhabitats in schoolyards and biomes, support different varieties of organisms; (B) describe how biodiversity contributes to the sustainability of an ecosystem. Key Understandings: Biodiversity contributes to the sustainability of an ecosystem. • How does biodiversity affect an ecosystem? • How does biodiversity support different varieties of organisms? Different environments support different organisms. • How do different ecosystems support different organisms? • What are some biotic components of an ecosystem? • What adaptations help organisms survive in different biomes? The greater the variety of species, the healthier the ecosystem. • How does the variety of species within an ecosystem maintain sustainability? Genetic variation leads to population stability. • How does genetic variation affect population stability within an ecosystem? Vocabulary: Ecosystem, sustainability, biodiversity, biome, biotic, adaptation, niche, abiotic, interaction, habitat, species, population Lesson 2: Succession TEK: 7.10 (C) (10) Organisms and environments. The student knows that there is a relationship between organisms and the environment. The student is expected to: (C) observe, record, and describe the role of ecological succession such as in a microhabitat of a garden with weeds. Key Understandings: Change occurs in ecosystems, including predator/prey relationships, food, water, air, and shelter balances, range shifts in flora and fauna, and changes in climate. • • • • • What factors change ecosystems? What is succession? What is primary succession? What is secondary succession? What are some examples of primary succession in the school yard? • What are examples of secondary succession in the school yard? Vocabulary: ecological succession, climax community, limiting factors, primary succession, pioneer species, flora, secondary succession, micro-habitat, fauna