diversity of living things

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7 Terms

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biodiversity

the product of millions of years of evolution as organisms adapt to changing circumstances

2
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three levels of biodiversity

  • genetic diversity

  • species diversity

  • ecosystem diversity

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genetic diversity

sum of different forms of genes

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species diversity

the variety of species & relative abundance

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ecosystem diversity

the relationship between the range of habitats and various organisms that live in them

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importance to humans

  • economic value - source of medicine, textiles, and industrial products

  • food source - sea food, crop production, decomposers

  • ecological life support - forests cleans air, water, control erosion

    • recreational - hiking, camping, relaxing in nature

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keystone species

  • a species that has a large impact if present or absent in an ecosystem

  • eg: sea otters -