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- Ecology and Biology: Shannon Diversity Index: Definition & Example The Shannon Diversity Index (sometimes called the Shannon-Wiener Index) is a way to measure the diversity of species in a community. Denoted as H, this index is calculated as: H = -Σpi * ln(pi) where: Σ: A Greek symbol that means “sum” ln: Natural log pi: The proportion of the entire community made up of species i The higher the value of H, the higher the diversity of species in a particular community. The lower the value of H, the lower the diversity. A value of H = 0 indicates a community that only has one species. The Shannon Equitability Index is a way to measure the evenness of species in a community. The term “evenness” simply refers to how similar the abundances of different species are in the community. Denoted as EH, this index is calculated as: EH = H / ln(S) where: H: The Shannon Diversity Index S: The total number of unique species What is the Shannon diversity index value for this community? What…EXTENSION: Biodiversity has many components. "Relative abundance" is a measure of how abundant the members are for one specific population when compared to all the living things in a community. The formula for this is: Relative Abundance (%) = [(# organisms in population of interest) / (total number of organisms in the community)] x 100 Given a 100 m² plot where the following species of grasses are present, calculate the relative abundance for species 4. Write your answer in the space below. Give your answer as a percentage. Round to the nearest whole number. Grass Species Number Present 210 48 LO 7% 8% 13 % 16% 76 122 159 252 75To the Bartleby Expert: How would you describe the slope of a rank abundance curve that vary with increasing species evenness?
- When we measure species density. If you apply random sampling and systematic sampling to a site setting, what problems may we encounter? Why is there an error compared with the actual density of species?SUBJECT : Biology - Ecology Give 5 examples each of dominant, invasive, and keystone species in a tabulated format AND explain how dominant, invasive and keystone species affect their community.INTRODUCTION: Quadrat sampling is a classic tool for the study of ecology, especially biodiversity. In general, a series of squares (quadrats) of a set size are placed in a habitat of interest and the species within those quadrats are identified and recorded. QUESTION: What are the advantages and disadvantages of a quadrat sampling method?
- a) Indicate the type of growth and the type of reproductive strategy that each population presents individually.b) Indicate the type of ecological interaction that exists between both populations. Support your answer mathematically.WRITE ABOUT A THEME: INTERACTIONS In Batesianmimicry, a palatable species gains protection by mimickingan unpalatable one. Imagine that individuals of a palatable,brightly colored fly species are blown to three remote islands.The first island has no predators of that species; the second haspredators but no similarly colored, unpalatable species; and thethird has both predators and a similarly colored, unpalatablespecies. In a short essay (100–150 words), predict what mighthappen to the coloration of the palatable species on each islandthrough time if coloration is a genetically controlled trait.Explain your predictionsAnother ecologist reported a diversity index value of 1.511 in a different community nearby the one you studied. This community is _ diverse than the one you calculated. Please see the attached image to get a better grasp of the question. How to Calculate Biodiversity and Ecology College Biology 2 Advanced Concepts Background Information In the Shannon index, p is the proportion (n/N) of individuals of one particular species found (n) divided by the total number of individuals found (N), ln is the natural log, Σ is the sum of the calculations, and s is the number of species... Species Evenness Species evenness takes into account the number of species and the relative abundance of species in a community. Several indices have been proposed. Two of the commonly used measures of evenness are the Shannon index (H) and the Simpson index (D). Question 2: What is the Shannon diversity index value for this community? What is the species evenness for this community?
- The competitive dominance hierarchy (left) and food web (right) diagrams below show simplified species relationships for a large meadow habitat in the midwestern United States. Recall what the direction of arrows means for each type of diagram, and then use these diagrams to answer the questions below. Leafhopper Beetle Grasshopper Bug Competition for food among herbivorous insects Spider A Leafhopper Bug Spider B Grasshopper Herbs Spider C Meadow food web BeetlePlease complete concept map for this activity. Concept Mapping activity, you will revise your concept map on sea otters from the beginning of the semester based on your new understanding and comprehension of traditional ecological knowledge. Based on the videos, your map should describe the relationships between sea otters, shellfish (like clams), and people. Consider including some of the following terms as you map these relationships: Butter clams Western knowledge systems Indigenous knowledge systems Management barriers Customary and traditional foods Colonial assumptions and methodologiesThink about a predator-prey system that perfectly follows Lotka-Volterra dynamics. The search efficiency parameter (a) represents how quickly the predator finds and kills its prey. What would happen if most the predator population had a parasite that made them less effective predators? Infected animals find and kill prey less frequently (that is, the parasite caused the value of the search efficiency parameter to decline). the populations would still cycle; the amplitude of prey and predator would increase Othe populations would no longer cycle; the prey would increase and the predator would go extinct the populations would no longer cycle; the prey would go extinct and the predator would increase the populations would still cycle; the amplitude of prey and predator would decline the predator and prey populations would no longer cycle; the parasite and the predator populations would cycle instead