Sunday, 12 October 2008 19:15

The Flow of Energy: Primary Production to Higher Trophic Levels

Written by University of Michigan
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The University of Michigan provides an in-depth account of energy flow through ecosystems. In this lesson, we wish to answer these questions:

  • How much of the sun's energy is available to and assimilated by plants, and how is that measured?
  • How are gross production, net production, and ecosystem production related?
  • How are standing crop, turnover rate, and net primary production related?
  • What types of ecosystems have the highest rates of production, and which make the biggest contributions to worldwide primary production?
  • What factors limit the amount of primary production locally and worldwide?
  • What is the efficiency with which energy is converted from trophic level to trophic level?
  • What are the differences between assimilation efficiency, net production efficiency, and ecological efficiency?
  • How do ecosystems differ in the amount of biomass or number of organisms present at any point in time, and generated over time, at each trophic level?
  • How much energy is available to humans, and how much do we use?

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Additional Info

  • Format: URL
  • Authoring Organization: Other External Resource
  • Language: English
  • Type: Staff Contribution
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