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Chapter 5 – Section 1: Biodiversity

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1 Chapter 5 – Section 1: Biodiversity
Essential Questions What are three types of biodiversity? Why is biodiversity important? What are the direct and indirect values of biodiversity? Biodiversity Copyright © McGraw-Hill Education

2 Vocabulary Review New gene extinction biodiversity genetic diversity
species diversity ecosystem diversity Biodiversity Copyright © McGraw-Hill Education

3 What is biodiversity? Biodiversity is the variety of life in an area that is determined by the number of different species in that area. Biodiversity increases the stability of an ecosystem and contributes to the health of the biosphere. Extinction occurs when the last member of a species dies. Copyright © McGraw-Hill Education Biodiversity

4 What is biodiversity? Genetic diversity
Genetic diversity is the variety of genes or inheritable characteristics that are present in a population. Genetic diversity increases the chances that some species will survive during changing environmental conditions or during the outbreak of disease. Copyright © McGraw-Hill Education Biodiversity

5 What is biodiversity? Species diversity
The number of different species and the relative abundance of each species in a biological community is called species diversity. Copyright © McGraw-Hill Education Biodiversity

6 What is biodiversity? Ecosystem diversity
The variety of ecosystems that are present in the biosphere is called ecosystem diversity. An ecosystem is made up of interacting populations and the abiotic factors that support them. Copyright © McGraw-Hill Education Biodiversity

7 The Importance of Biodiversity
Direct economic value Humans depend on plants and animals for food, clothing, energy, and medicine. Most of the world’s food crops come from just a few species. Wild species serve as reservoirs of desirable genetic traits that might be needed to improve commercial crop species. Scientists continue to find new extracts from plants and other organisms that help in the treatment of human diseases. Copyright © McGraw-Hill Education Biodiversity

8 The Importance of Biodiversity
Indirect economic value A healthy biosphere provides many services to humans: Green plants provide oxygen and remove carbon dioxide. Natural processes provide drinking water that is safe for human use. It is often difficult to assign an economic value to biosphere services. Copyright © McGraw-Hill Education Biodiversity

9 The Importance of Biodiversity
Aesthetic and scientific values There is value in maintaining healthy ecosystems that are beautiful or interesting to study It is difficult to assign economic value to these services. Copyright © McGraw-Hill Education Biodiversity

10 Review Essential Questions Vocabulary
What are three types of biodiversity? Why is biodiversity important? What are the direct and indirect values of biodiversity? Vocabulary extinction biodiversity genetic diversity species diversity ecosystem diversity Copyright © McGraw-Hill Education Biodiversity

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