biodiversity

• What does species diversity measure?

  Number of different species and individuals
• What is genetic diversity?

  Variety of genes among individuals in a species
• What does ecosystem diversity refer to?

  Range of different habitats in an area
• Why is it important to know about biodiversity?

  To describe changes in habitats over time
• What does low biodiversity in a habitat indicate?

  It may not always be a concern
• What human activity is primarily focused on in AQA Biology regarding biodiversity?

  Farming practices that reduce biodiversity
• What are common farming practices that reduce biodiversity?

  • Destruction of hedgerows
  • Selective breeding
  • Monoculture
  • Overgrazing
  • Draining wetlands
• What is the impact of destroying hedgerows on biodiversity?

  It removes habitats for various species
• What is selective breeding?

  Choosing desirable traits for reproduction
• What is monoculture in farming?

  Growing only one plant species in a field
• How does overgrazing affect biodiversity?

  It reduces plant populations and food webs
• What is the significance of compromises in farming?

  To balance food production and biodiversity conservation
• What are some compromises that can be made in farming to conserve biodiversity?

  • Limiting hedgerow removal
  • Selective breeding in specific areas
  • Implementing crop rotations
  • Growing diverse species in sections
• How is biodiversity measured?

  Using the index of diversity
• What is the difference between species richness and index of diversity?

  Index includes individuals per species
• What is Simpsons index of diversity used for?

  Calculating biodiversity considering species numbers
• What does capital N represent in the index of diversity formula?

  Total number of organisms of all species
• What does lowercase n represent in the index of diversity formula?

  Population size of one species
• What is the lowest value you can get in the index of diversity?

  One
• What does a larger index of diversity value indicate?

  Greater species diversity
• What is the typical range for the index of diversity?

  Typically between three and six
• If species A has 25 individuals, what is the calculation for the numerator in the index of diversity?

  25 times 24
• If the denominator of the index of diversity is 180, what is the final calculation for the index?

  Numerator divided by 180
• What resources can students use for additional practice on biodiversity calculations?

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