Campbell Biology in Focus (2nd Edition)
2nd Edition
ISBN: 9780321962751
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 41.2, Problem 1CC
What two components contribute to species diversity? Explain how two communities with the same number of species can differ in species diversity.
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Chapter 41 Solutions
Campbell Biology in Focus (2nd Edition)
Ch. 41.1 - Explain how interspecific competition, predation,...Ch. 41.1 - According to the principle of competitive...Ch. 41.1 - MAKE CONNECTIONS Figure 22.13 illustrates how a...Ch. 41.2 - What two components contribute to species...Ch. 41.2 - How is a food chain different from a food web?Ch. 41.2 - WHAT IF? Consider a grassland with five trophic...Ch. 41.2 - MAKE CONNECTIONS Rising atmospheric CO2 levels...Ch. 41.3 - Why do high and low levels of disturbance usually...Ch. 41.3 - During succession, how might the early species...Ch. 41.3 - WHAT IF? Most prairies experience regular fires,...
Ch. 41.4 - Describe two hypotheses that explain why species...Ch. 41.4 - Describe how an islands size and distance from the...Ch. 41.4 - WHAT IF? Based on MacArthur and Wilsons island...Ch. 41.5 - What are pathogens?Ch. 41.5 - Prob. 2CCCh. 41 - The feeding relationships among the species in a...Ch. 41 - Prob. 2TYUCh. 41 - Prob. 3TYUCh. 41 - Community 1 contains 100 individuals distributed...Ch. 41 - Prob. 5TYUCh. 41 - SCIENTIFIC INQUIRY An ecologist studying plants in...Ch. 41 - FOCUS ON EVOLUTION Explain why adaptations of...Ch. 41 - FOCUS ON INFORMATION In Bateslan mimicry, a...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Describe two types of...
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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…arrow_forwardIs it possible that some species function together as an integrated, holistic community, whereas other species at the same locality behave more individualistically? If so, what factors might determine which species function in which way?arrow_forwardWhat limiting factors exist between regional species pools and local communities? Name all 3.arrow_forward
- Why do ecologists consider both species richness and species evenness when they quantify species diversity?arrow_forwardCompare and contrast species scale vs. system scale goals for conserving both mutualist biodiversity and mutualist ecosystem function. Give a real world example in which one of these approaches is used for mutualism conservation and explain its strengths and weaknesses with respect to conserving mutualism.arrow_forwardWhat is the other component of species diversity besides richness? Briefly describe how two communities of trees might differ in that component.arrow_forward
- What explains the correlation between species richness and disturbance frequency?arrow_forwardHow is the species richness of a community related to the environmental stress of a habitat?arrow_forwardDescribe a hypothetical three community with high species richness but low species evennessarrow_forward
- What do scientists use species richness to measurearrow_forwardHow is the Biodiversity Index calculated? Total number of individuals x number of species Total number of individuals - number of species Number of species divided by total number of individuals Number of species + total number of individualsarrow_forwardUsing the community assembly theory, provide a framework or explanation on: How do some exotic species outperform locally-adapted native species? Cite specific example(s).arrow_forward
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