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ECOLOGY
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ECOLOGY

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  1. ECOLOGY

  2. Study of an Ecosystem • Preparation • Fieldwork • Follow-up activities • Report writing

  3. Preparation • Learning objectives • Advance planning • Safety

  4. Quantitative Study

  5. Syllabus 1.5.3 • Quantitative Study of plants and animals of a sample area of the selected ecosystem • Transfer Results to • Diagrams • Graphs • Tables • Histograms • Other relevantmode

  6. Quantitative Study • No. of organisms present • Quadrat

  7. Quadrat • A frame that forms a known area • Usually square shaped • Can be used to measure: Frequency % Cover

  8. Frequency • The chance of finding a named organism within the sample area in a number of quadrats • May be expressed as a percent of the total number of quadrats sampled

  9. Frequency Procedure • Throw the quadrat randomly in the sample area • Record the presence or absence of a named organism within each quadrat • Repeat for a number of throws • Tabulate results

  10. Frequency table If percentage is required multiply frequency by 100

  11. Frequency Procedure • Throw the quadrat randomly in the sample area • Record the presence or absence of a named organism within each quadrat • Repeat for a number of throws • Tabulate results

  12. Plot Graph X axis = Organisms Y axis = % Frequency

  13. Tabulation of results Auto Calculations

  14. % Cover • Quadrat divided into a grid • Intersections form sampling points • Plant scores a hit if touched by the needle • Canopy organisms / all organisms

  15. % Cover • An area of ground occupied by aerial parts of individual plants of the species examined and counted • Expressed as a percentage of the total quadrat area

  16. % Cover procedure • Throw a quadrat at random • Record the plant hit at each sampling point • Repeat for a number of throws • Tabulate results

  17. % Cover table

  18. % Cover procedure • Throw a quadrat at random • Record the plant hit at each sampling point • Repeat for a number of throws • Tabulate results

  19. Tabulation of results Auto Calculations

  20. Data Presentation ICT contributes to display, calculation and analysis of data. (example Excel) Graphs Analysis Calculations Spreadsheets

  21. 1.5.7 AnalysisPrepare a brief report of the results obtained Syllabus page 14

  22. Report writing • Option A • Presentation of results and analysis of all ecology fieldwork together in portfolio format • Option B • Presentation of results of each individual ecology activity separately in regular practical notebook with one common analysis

  23. Option AA portfolio should contain • Title page • Introduction • Site description • Methods used • Results • Analysis

  24. Presentation of results of each individual ecology activity separately in regular practical notebook with one common analysis Option B