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Ecopath with Ecosim
Advancing software for ecological forecasting
National Centre for Supercomputing Applications
25 March 2014
Jeroen Steenbeek
What is EwE?
• Ecological model that tracks
the paths of energy through a food web
• Functional groups
• Requires relatively few input parameters
• Data often readily available
• Environment and human activities
• Free and open source
• 30 year since first publication
• Written in Microsoft .NET, modular
Ecopath with Ecosim
Challenges to ecosystem modeling
• Ecosystems are staggeringly complex
• Feedback effects throughout entire system
• Modelled entities span traditional scientific boundaries
• Modelled entities span scales of several orders of magnitude
• Impact interactions are often poorly understood
(climate change, anthropogenic)
“Essentially, all models are wrong, but some are useful”
- George P. Box (1987)
Where we need to go
Thank you
jeroen@ecopathinternational.org

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Jeroen Steenbeek Ecopath with Ecosim

  • 1. Ecopath with Ecosim Advancing software for ecological forecasting National Centre for Supercomputing Applications 25 March 2014 Jeroen Steenbeek
  • 2. What is EwE? • Ecological model that tracks the paths of energy through a food web • Functional groups • Requires relatively few input parameters • Data often readily available • Environment and human activities • Free and open source • 30 year since first publication • Written in Microsoft .NET, modular
  • 4. Challenges to ecosystem modeling • Ecosystems are staggeringly complex • Feedback effects throughout entire system • Modelled entities span traditional scientific boundaries • Modelled entities span scales of several orders of magnitude • Impact interactions are often poorly understood (climate change, anthropogenic) “Essentially, all models are wrong, but some are useful” - George P. Box (1987)