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Warmer Oceans Affect Food Web
http://www.pbslearningmedia.org/resource/ean08.sci.life.eco.foodfish/

KTOO, WGBH Educational Foundation, Teachers' Domain

In this video, students learn that the Exxon Valdez oil spill in Alaska in 1989 was not the sole cause of the decline of species in the local ecosystem. Rather, an explanation is posited for why some animal populations were already in decline when the spill occurred. Many of these animals share a common food: the sand lance, a fish whose populations have shrunk with the steady rise in ocean temperature that began in the late 1970s.

Video length: 2:30 minutes.

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Learn more about Teaching Climate Literacy and Energy Awareness»

Climate Literacy
About Teaching Climate Literacy

Individual organisms survive within specific ranges of temperature, precipitation, humidity, and sunlight. Organisms exposed to climate conditions outside their normal range must adapt or migrate, or they will perish.
About Teaching Principle 3
Other materials addressing 3a
Growing evidence shows that changes in many physical and biological systems are linked to human-caused global warming. Some changes resulting from human activities have decreased the capacity of the environment to support various species and have substantially reduced ecosystem biodiversity and ecological resilience.
About Teaching Principle 6
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Benchmarks for Science Literacy
Learn more about the Benchmarks

The benefits of Earth's resources—such as fresh water, air, soil, and trees—can be reduced by deliberately or inadvertently polluting them. The atmosphere, the oceans, and the land have a limited capacity to absorb and recycle waste materials. In addition, some materials take a long time to degrade. Therefore, cleaning up polluted air, water, or soil can be difficult and costly.
Explore the map of concepts related to this benchmark
Human activities, such as reducing the amount of forest cover, increasing the amount and variety of chemicals released into the atmosphere, and intensive farming, have changed the earth's land, oceans, and atmosphere. Some of these changes have decreased the capacity of the environment to support some life forms.
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The world contains a wide diversity of physical conditions, which creates a wide variety of environments: freshwater, marine, forest, desert, grassland, mountain, and others. In any particular environment, the growth and survival of organisms depend on the physical conditions
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Notes From Our Reviewers The CLEAN collection is hand-picked and rigorously reviewed for scientific accuracy and classroom effectiveness. Read what our review team had to say about this resource below or learn more about how CLEAN reviews teaching materials
Teaching Tips | Science | Pedagogy | Technical Details

About the Science

  • Scientists and Alaska residents in this short video discuss how the declines in several animals in Prince William Sound may well be the result of ocean temperature rise as well as oil pollution from the 1989 Exxon Valdez oil spill.
  • The video gives an idea about how a scientific hypothesis is developed.
  • Comment from expert scientist: Scientifically sound resource.
  • Passed initial science review - expert science review pending.

About the Pedagogy

  • This video has strong visuals of several animals.
  • A good background essay and discussion questions accompany the video.

Technical Details/Ease of Use

  • The streaming video quality is not suitable for classroom projection; the downloadable version is more suitable.

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