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Ecological indices report 2222222

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Diversity Indices

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Ecological indices report 2222222

  1. 1. Diversity Indices • Shannon Species Index • Species Richness • Pielou Index of Evenness • Margalef Species Richness
  2. 2. Objectives: • Determine the importance of using Ecological indices in conducting ecological studies. • Use the formula Shannon Species Index, Pielou Index of Evenness, Species Richness and Margalef Species Richness to solve an Ecological study simulation.
  3. 3. Ecology • Physiological Ecology Applications • Population Ecology • Community Ecology • Ecosystem Ecology
  4. 4. Ecological Diversity • Relates to the different forms of life which are present in a particular site.
  5. 5. Diversity Index • A diversity index is a mathematical measure of species diversity in a community. • Diversity indices provide more information about community composition than simply species richness (i.e., the number of species present); they also take the relative abundances of different species into account
  6. 6. Diversity Index • Diversity indices provide important information about – rarity – commonness of species in a community. The ability to quantify diversity in this way is an important tool for biologists trying to understand community structure.
  7. 7. Shannon Species Diversity Index • The Shannon diversity index (H) is another index that is commonly used to characterize species diversity in a community. • Shannon's index accounts for both abundance and evenness of the species present.
  8. 8. Practice: Determine species diversity using Shannon Species Diversity Index
  9. 9. Transfer your data in the table Species #Individual Pi lnPi Pi (lnPi) 1 2 3 4 5 Total = H’=
  10. 10. Pielou’s Index of Evenness • Refers to HOW close in numbers each species in an environment are.
  11. 11. Species Richness and Margalef Species Richness • Species richness is a measure for the total number of the species in a community. • This measure is strongly dependent on sampling size and effort.
  12. 12. THE END

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