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Overview: This news brief, from April 2012, describes how climate change is affecting a population of chipmunks in Yosemite National Park. The chipmunks' loss of genetic variation may affect their ability to survive and their future evolutionary potential. Author/Source: UC Museum of Paleontology Grade level: 9-12 Time: 20 minutes Teaching tips: This article includes a set of discussion and extension questions for use in class. It also includes hints about related lessons that might be used in conjunction with this one. Get more tips for using Evo in the News articles in your classroom. Concepts: Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details. Evolution results from selection acting upon genetic variation within a population. (LS4.B) The amount of genetic variation within a population may affect the likelihood of survival of the population; the less the available diversity, the less likely the population will be able to survive environmental change. Natural selection acts on the variation that exists in a population. (LS4.B, LS4.C) As with other scientific disciplines, evolutionary biology has applications that factor into everyday life. There is variation within a population. (LS3.B) Teacher background: Genetic Variation

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