Measuring Diversity

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  • Measuring Diversity
    • Species Richness
      • Number of different species in a habitat
      • High no. of dif species = greater  species richness
      • Is measured by taking taking random samples and counting how many different species in it
    • Species Evenness
      • Abundance of each species. How many individuals present in each species
      • Is measured by taking random samplings from a habitat and counting the number of individuals
      • The more similar the poulation size, the greater the species evenness - similar size means equal distribution
    • Simpsons Index
      • Formula
      • SI takes both species evenness and richness into account
      • Always from 0 to 1. Closer to 1 = diverse
      • More species evenness and richness means higher value for D


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