Marine Biology

, Volume 35, Issue 1, pp 1–7 | Cite as

The structure of Marine Ecosystems: An alternative

  • M. R. Landry


In “The Structure of Marine Ecosystems” (1974), Steele developed a simulation model which suggested that the stability of planktonic communities was dependent on a threshold response allowing phytoplankton a refuge in concentration below which herbivorous zooplankton did not feed. Observations from the North Sea were presented to support this hypothesis. In order to more realistically represent the simulated herbivores, Calanus spp., several of Steele's assumptions have been modified. The results of the revised model indicate that feeding thresholds are not essential for the long-term realism and stability of the simulated system and suggest an alternative, ecosystem control through predation.


Phytoplankton Simulation Model Marine Ecosystem Simulated System Threshold Response 
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Literature Cited

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • M. R. Landry
    • 1
    • 2
  1. 1.Department of OceanographyUniversity of WashingtonSeattleUSA
  2. 2.Institute of Marine ResourcesUniversity of CaliforniaLa JollaUSA

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