ECOPATHEcopath with Ecosim (EwE) is a free ecological/ecosystem modeling software suite. EwE has three main components: Ecopath – a static, mass-balanced snapshot of the system; Ecosim – a time dynamic simulation module for policy exploration; and Ecospace – a spatial and temporal dynamic module primarily designed for exploring impact and placement of protected areas. The Ecopath software package can be used to

  • Address ecological questions;
  • Evaluate ecosystem effects of fishing;
  • Explore management policy options;
  • Analyze impact and placement of marine protected areas;
  • Predict movement and accumulation of contaminants and tracers (Ecotracer);
  • Model effect of environmental changes;
  • Facilitate end-to-end model construction.

Latest release

The latest release of Ecopath with Ecosim is version 6.6.8, released in November 2022.

EwE 6.7 is in the works with exciting features such as shared arenas, other mortality forcing, multi-threaded stepwise fitting, colorblind themes throughout the UI, an easier to use licensing system, and a pile of bug fixes.

September 2024: The next version of EwE, version 6.7, is getting ready to be released in 2025. We have stopped adding features and are now exclusively debugging and testing.

This release has been faciliated largely through EU projects Ecoscope and MarinePlan, countless invaluable user contributions, and EwE professional licenses. You can access the most recent builds of EwE 6.7 from our pCloud storage. Please report any bugs that you find via the EwE help > About menu.

Announcements

September 2024: The brand new EwE text book – explaining the EwE theory – and EwE software user guide – showing you how to operate the EwE software – are now available! The two manuals are accessible directly fom the ecopath.org home page.

Note that these are living documents that you can contribute to. To request contributor access, please contact us.

Perpetually: We are looking for EwE modellers interested in showcasing their work in the recurring seminar sessions.

If you are interested in presenting, please contact us!