Below are two ecosystems showing the proportions of small mammals found in them. Use a calculator to calculate the answers to the questions below. (4 pts.) Ecosystem A B deer mouse 45% 50% red-backed vole 35% 25% masked shrew 20% 25% Shannon index: H = - ∑ (pi)(log pi) Evenness = H/Hmax a. What is Hmax? b. What is the evenness for ecosystem A? c. What is the evenness for ecosystem B? d. Which ecosystem, A or B, is more diverse based on evenness? Question 24 options:
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Community A and Community B are each inhabited by the same three species. A researcher collects 800 individuals from Community A, and 800 from Community B. The collection from Community A consists of 100 individuals of Species 1, 200 of Species 2, and 500 of Species 3. The collection from Community B consists of 200 individuals each from Species 1, 2, and 3. Determine the Shannon index of diversity (H) for each community. Which community has the higher level of diversity? Why? (2.5 points) Question 2: Community A and Community B are each inhabited by the same three species. A researcher collects 800 individuals from Community A, and 800 from Community B. The collection from Community A consists of 265 individuals from Species 1, 268 from Species 2, and 267 from Species 3. The collection from Community B consists of 90 individuals from Species 1, 600 from Species 2, and 110 from Species 3. Determine the Simpson's index of diversity (D) for each community. Which has the higher level of diversity? Why? (2.5 points)
Supreeta N.
35. What is the species richness for each habitat? (1 point) Habitat 1: Habitat 2: 36. Calculate the Community Dominance Index (CDI) for each habitat. Does the CDI differ between habitats? If so, what conclusion can you make? (3 points) CDI Habitat 1: Habitat 2: 37. You are given the following values: Habitat 1: H'=1.69, H'max=1.95; Habitat 2: H'=1.84, H'max=2.08. Calculate the J' for the Shannon index in each habitat. What can you say about evenness if comparing the two habitats? (3 points) J' - Habitat 1: Habitat 2:
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Community 1 contains 100 individuals distributed among four species: $5 \mathrm{A}, 5 \mathrm{B}, 85 \mathrm{C},$ and $5 \mathrm{D} .$ Community 2 contains 100 individuals distributed among three species: $30 \mathrm{A}, 40 \mathrm{B},$ and 30C. Calculate the Shannon diversity ( $H$ ) for each community. Which community is more diverse?
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