Biodiversity What is Biodiversity Calculating Biodiversity Do Now
Biodiversity -What is Biodiversity? -Calculating Biodiversity
Do Now 1. Explain what Biodiversity is (1 -2 sentences)? 2. Which of the following are abiotic factors that shape ecosystems? A. worms, plants and temperature B. wind, precipitation, and soil type C. niches, trees, and bacteria D. sunlight, mushrooms, and wind
What is Biodiversity? • Well lets break the word biodiversity down • Bio: Life • Diversity: Having Variety
Biodiverse Ecosystems • What are the components of biodiversity in an ecosystem? • Variety of: • • • Plants Animals Fungi Insects Bacteria Many species, many traits, many varieties • An ecosystem that has a high level of diversity is a system that can support itself, stay healthy, and be resistant to changes within the entire environment.
Measuring Biodiversity • How do we measure biodiversity? • Species Richness: The total number of species in an area. Must count and then add them up. • Species Evenness: How are the entire amount of species represented in the area (are most of the species the same? ). • Simpson’s Index: This index is found by taking species richness and species evenness and converting it into one number.
Calculations •
Example Time! • In a rain garden there are many species of organisms. Species A has 13 individual organisms, Species B has 4, Species C has 8, Species D has 5, and Species E has 9. Step 1 Put data in to a Chart Species Number of a Particular Species (n) A 13 B 4 C 8 D 5 E 9
• Species n n-1 n(n-1) Species A 13 13 -1=12 13(13 -1)=156 Species B 4 4 -1=3 4(4 -1)=12 Species C 8 8 -1=7 8(8 -1)=56 Species D 5 5 -1=4 5(5 -1)=20 Species E 9 9 -1=8 9(9 -1)=72 316
• Species n A 13 B 4 C 8 D 5 E 9 N 39
• Step 5: Analysis of Simpson’s Index • Simpson’s Index ranges from 0 -1 • 0 limited biodiversity in an area • 1 high biodiversity in an area • Our number is 0. 7753 • We have a high level of biodiversity within our sample area.
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