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Chapter 3: Ecosystem Ecology - Lesson 1: Movement of Energy

Chapter 3: Ecosystem Ecology - Lesson 1: Movement of Energy

  1. List the basic components of an ecosystem.
  2. Describe how energy flows through ecosystems.
  1. An ecosystem has both biotic and abiotic components, all of whic interact with one another.  An ecosystem has characteristic species as well as specific abiotic characteristics such as amount of sunlight, temperature, and salinity.  Every ecosystem has boundaries, although they are often subjective.
  2. The energy that flows through most ecosystems originates from the Sun.  Ecosystems have multiple trophic levels through which energy flows.  Producers use solar energy to generate biomass via photosynthesis.  That stored energy can be passed on to consumers and decomposers and is ultimately lost as heat.  The low efficiency energy transfer between trophic levels means that only a small fraction of the energy at any trophic level - about 10 percent - is available to be used at the next higher trophic level.  Low ecological efficiency results in a large biomass of producers, but a much lwoer biomass of primary consumers, and even lower biomass of secondary consumers.
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Chapter 3 Lesson 1 Sticky Note Video

Watch this video, complete your sticky notes and WSQ Form and be ready for a quiz tomorrow! :)

World: Haiti's Legacy of Environmental Disaster

Even before the Jan. 12, 2010 earthquake Haiti's environment teetered on the brink of disaster. Brent and Craig Renaud traveled to report country's deforestation problems just weeks before the deadly earthquake.

Ecosystem Ecology: Links in the Chain

Hank brings us to the next level of ecological study with ecosystem ecology, which looks at how energy, nutrients, and materials are getting shuffled around within an ecosystem (a collection of living and nonliving things interacting in a specific place), and which basically comes down to who is eating who.

NPP has Maxed Out in Spite of Warming

NPP is Net Primary Production. It is basically how much net carbon is stored by the biosphere. It has been found that not all the fossil fuel carbon goes into the air, and that the ocean can take only half the remainder, so half has been going into the biosphere/soil system. However, this good fortune may not continue as the biosphere saturates and as mankind attacks the biosphere by deforestation and burning.

Chapter 3 Lesson 1 WSQ

Complete this WSQ after you watch Mrs. Schaelling's Chapter 3 Lesson 1 Video. This should be done before you come to class.

DOK Question Stems

Try to create most of your questions at a DOK Level 2 or 3. That way you're challenging your thinking.