Use the Graph to Answer the Following Question

question 17

Multiple Choice

Use the graph to answer the following question. Which of the following is the best conclusion about the effect of a keystone species, based on the graphed data?

• A) A keystone species has little interaction with other species in an environment.
• B) Removing a keystone species from the community drastically reduces species richness.
• C) Adding a keystone species to the community will make it more diverse.
• D) Removing a keystone species from the community will eventually allow for the invasion of a new species.

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Definitions:

Pairwise Comparisons

A process of comparing entities in pairs to judge which is preferred or has a greater amount of some quantitative property.

Tukey's Method

A statistical technique used to identify outliers within a dataset, often used in conjunction with analysis of variance (ANOVA) tests.

Honestly Significant Differences

A statistical technique used to determine if the difference between two or more groups is significant and not likely due to chance.

Sample Means

The average value of a set of data points drawn from a larger population, representing an estimate of the population mean.