This informational text resource is designed to support reading in the content area. The article discusses the effects of the wolf population in Yellowstone National Park, as well as how other organisms are linked in this food web. As the wolf population decreases, the elk population increases due to lack of predation. The larger elk population decimates the willow population, a prime source of food and building for the beaver. As beaver population decreases, streams no longer deposit enough sediments. This then changes the willow population, because they are no longer able to take root in the stream.
Subject(s): Science, English Language Arts
Grade Level(s): 9, 10
Resource supports reading in content area:Yes
Keywords: yellowstone, wolf, beaver, trophic cascade, ecosystem, food web, food chain, interactions, symbiosis, predation, informational text, text complexity
The text's grade band recommendation reflects the shifts inherent in the standards and is based on a text complexity analysis of a quantitative measure, qualitative rubric, and reader and task considerations.
Please see the attached resources for an original lesson plan that utilizes this informational text resource.
Source and Access Information
Name of Author/Source: Sarah Gilbert, Marino Nardelli, Cheryl Dybas
District/Organization of Contributor(s): Florida State University
Access Privileges: Public
* Please note that examples of resources are not intended as complete curriculum.