DP Biology (last assessment 2024)
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C.4 Conservation of biodiversity

Description

Nature of science:
Scientists collaborate with other agencies—the preservation of species involves international cooperation through intergovernmental and non-governmental organizations. (4.3)Understandings:

  • An indicator species is an organism used to assess a specific environmental condition.
  • Relative numbers of indicator species can be used to calculate the value of a biotic index.
  • In situ conservation may require active management of nature reserves or national parks.
  • Ex situ conservation is the preservation of species outside their natural habitats.
  • Biogeographic factors affect species diversity.
  • Richness and evenness are components of biodiversity.

Applications and skills:

  • Application: Case study of the captive breeding and reintroduction of an endangered animal species.
  • Application: Analysis of the impact of biogeographic factors on diversity limited to island size and edge effects.
  • Skill: Analysis of the biodiversity of two local communities using Simpson’s reciprocal index of diversity.

Guidance:

  • The formula for Simpson’s reciprocal index of diversity is:

    D = diversity index, N = total number of organisms of all species found and n = number of individuals of a particular species.

Aims:

  • Aim 8: Scientists supported by governments are devoting relatively large amounts of effort to save particular animal species. Can criteria be established to justify a hierarchy of value of one species over another?

 


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