ࡱ>  bjbj 4eeD8$ R*))))))),+.P))i *iiiF)i)ii(0y) !h`bO1)$)"*0R*U)$/i/Hy)iy)<))iR*/ `:   Biodiversity Calculation Lab Biodiversity indexes are used to determine the biodiversity of a given ecosystem. In this lab, you will calculate the biodiversity index of an ecosystem. Biodiversity index = # species /# organisms. In other words: Biodiversity index = # Species # Organisms The closer to 1 the biodiversity index is, the more diverse and healthy the ecosystem is. Directions: Your group has been given a bottle of beans that represents an ecosystem. Each groups bottle holds a different assortment and a different number of beans. Each bean type in your bottle represents a different species in an ecosystem. All of the species that live in a one square kilometer area of a particular habitat are included in your bottle. The quantity of any one type of bean represents the number of organisms of that species that exist in the ecosystem. Follow the steps below to (1) calculate the biodiversity index of your sample ecosystem, then (2) use the biodiversity index you calculated to estimate the kind of ecosystem your bottle represents. Sample at least 3 populations. 1. Organize your beans by type. Record each bean type (species) in column 2 of the chart below. Now count your beans, recording the number of each type of bean (organisms) in column 3 of the chart. 2. Add up the number of different species (different types of beans) represented in your sample (column 2), and record that figure in column 1 of the chart. 3. Add up the total number or organisms (all beans), and record that figure in column 4 of the chart. 4. Calculate the biodiversity of your sample ecosystem, based on the number of different species and the total number of organisms in your sample. Record the result in column 5 of the chart. Total # of Species# of Individuals of Each SpeciesTotal # of OrganismsBiodiversity IndexType of Bean (Species)Quantity of That Type (Organisms) Total # of Species# of Individuals of Each SpeciesTotal # of OrganismsBiodiversity IndexType of Bean (Species)Quantity of That Type (Organisms) Total # of Species# of Individuals of Each SpeciesTotal # of OrganismsBiodiversity IndexType of Bean (Species)Quantity of That Type (Organisms) 5. Use the information in the chart below to estimate which type of ecosystem your bottle represents. EcosystemBiodiversity IndexTropical Rain forests0.75Coniferous forests0.5Deciduous forests0.5Deserts0.33Grasslands0.33Cultivated fields0.019 What kind of ecosystems does your samples represent? _____________________________ 6. Get a bag of beans labeled sampling. We will examine the effect of sample size on your estimation of diversity. Close your eyes and pull 5 beans from the bag. How many species did you get? Do the same for 10, 20, 50 and all 100 beans. 5 10 20 50 100 7. Respond to the following questions: A. What does biological diversity mean? B. What did this simulation symbolize? C. If you cut down all of the various kinds of trees in a piece of forest you owned, then replanted with one type of tree, what might happen to the wildlife that was adapted to that forest? D. Will this happen to all of the wildlife in the forest? Why or why not? E. Many species can only live and reproduce in one type of forest. The spotted owl is one example: It can only live and successfully reproduce in old growth forests (e.g., old cedars, hemlocks). If these old growth forests are cut down, its unlikely that this owl species will survive. Conservation biologists call such an organism an indicator species. What does this mean? Why should we be concerned about one species? F. What effect did a larger sample size have on your estimate of biodiversity? At what point did you get an accurate measure of diversity?     Biodiversity Conservation Unit Biodiversity Hotspots !*+HLY[m  ! 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