Ecopath
Ecosystem modelling software
title: "Ecopath" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["environmental-science-software", "conceptual-modelling", "fisheries-science", "computing-by-computer-model"] description: "Ecosystem modelling software" topic_path: "technology/computing" source: "https://en.wikipedia.org/wiki/Ecopath" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Ecosystem modelling software ::
::data[format=table title="Infobox software"]
| Field | Value |
|---|---|
| name | Ecopath with Ecosim |
| logo | EwE6Logo Transparent.png |
| logo size | 200px |
| caption | Ecopath with Ecosim |
| developer | Ecopath Research and Development Consortium |
| released | 1992 |
| latest release version | 6.6.8 |
| latest release date | 4 November 2022 |
| latest preview version | 6.7 alpha (on request) |
| latest preview date | 4 November 2022 |
| repo | https://sources.ecopath.org/trac/Ecopath |
| programming language | Visual Basic.NET, C# |
| operating system | Windows Vista (non-supported), 7, 8*, 10, 11 (EwE desktop version), Unix and Linux (EwE core via Mono) |
| platform | .NET Framework 4.8 |
| language | English |
| license | GPL v2 |
| website | https://www.ecopath.org |
| genre | Ecosystem model |
| :: |
| name = Ecopath with Ecosim | logo = EwE6Logo Transparent.png | logo size = 200px | screenshot = | caption = Ecopath with Ecosim | author = | developer = Ecopath Research and Development Consortium | released = 1992 | latest release version = 6.6.8 | latest release date = 4 November 2022 | latest preview version = 6.7 alpha (on request) | latest preview date = 4 November 2022 | repo = https://sources.ecopath.org/trac/Ecopath | programming language = Visual Basic.NET, C# | operating system = Windows Vista (non-supported), 7, 8*, 10, 11 (EwE desktop version), Unix and Linux (EwE core via Mono) | platform = .NET Framework 4.8 | language = English | license = GPL v2 | website = https://www.ecopath.org | genre = Ecosystem model Ecopath with Ecosim (EwE) is a free and open source ecosystem modelling software suite, initially started at NOAA by Jeffrey Polovina, but has since primarily been developed at the formerly UBC Fisheries Centre of the University of British Columbia. In 2007, it was named as one of the ten biggest scientific breakthroughs in NOAA's 200-year history. The NOAA citation states that Ecopath "revolutionized scientists' ability worldwide to understand complex marine ecosystems". Behind this lie more than three decades of development work in association with a thriving network of fisheries scientists such as Villy Christensen, Carl Walters and Daniel Pauly, and software engineers around the world. EwE is funded through projects, user contributions, user support, training courses and co-development collaborations. Per November 2021 there are an estimated 8000+ users across academia, non-government organizations, industry and governments in 150+ countries.
Components
EwE has three main components:
- Ecopath – a static, mass-balanced snapshot of the system
- Ecosim – a time dynamic simulation module for policy exploration
- Ecospace – a spatial and temporal dynamic module designed for exploring the combined impacts of fishing, the placement of protected areas, and changing environmental conditions.
Capabilities
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 ecosystem model construction
Development Ecopath version 6.0 received support from the Lenfest Ocean Program and the Pew Charitable trusts. In 2011 the Ecopath Research and Development Consortium was founded to share the responsibility of maintaining and further developing the approach with institutions around the world. EwE exclusively relies on user involvement for continued software development and releases of new versions.
The desktop version of Ecopath with Ecosim runs only on Windows and requires Microsoft Access database drivers version 2007 or newer. The computational core of Ecopath with Ecosim can be executed on other operating systems such as Unix or Linux using the Mono common language runtime. Spin-off versions in R, Matlab and Fortran are developed independently of the main desktop version of EwE, and are not supported by the Ecopath Research and Development Consortium.
Funding
In 2013, development efforts were centralized under Ecopath International Initiative, Spain, which coincided with a switch to a community-driven development model overseen by the Ecopath Research and Development Consortium. As the approach does not receive any core funding, the Ecopath with Ecosim approach now relies entirely on user-contributed project funding for continued development and releases.
References
References
- NOAA, 2007. ECOPATH Modeling: Precursor to an Ecosystem Approach to Fisheries Management [WWW Document]. URL http://celebrating200years.noaa.gov/breakthroughs/ecopath/welcome.html (accessed 8.26.12).
- Christensen, V. and Pauly, D., 1992. Ecopath II - a software for balancing steady-state ecosystem models and calculating network characteristics. Ecological Modelling, 61:169-185.
- Walters, C., Christensen, V. and Pauly, D., 1997. Structuring dynamic models of exploited ecosystems from trophic mass-balance assessments. Rev Fish Biol Fish, 7:139-172
- Walters, C., Pauly, D. and Christensen, V., 1999. Ecospace: Prediction of mesoscale spatial patterns in trophic relationships of exploited ecosystems, with emphasis on the impacts of [[Marine Protected Area. marine protected areas]]. Ecosystems, 2:539-554.
- (Jun 10, 2021). "Exploring Impacts of River Discharge on Forage Fish and Predators Using Ecopath With Ecosim". Frontiers in Marine Science.
- Christensen, V. and Pauly, D. (Editors), 1993. Trophic Models of [[Aquatic ecosystem. Aquatic Ecosystems]]. [[WorldFish Center. ICLARM]] Conference Proceedings 26, Manila, 390 p.
- Walters, C.J., Christensen, V., Martell, S.J. and Kitchell, J.F., 2005. Possible ecosystem impacts of applying MSY policies from single-species assessment. ICES J Mar Sci, 62:558-568.
- Christensen, V. and Walters, C.J., 2004. Trade-offs in ecosystem-scale optimization of [[fisheries management]] policies. Bull Mar Sci, 74:549-562
- Walters, C.J. and Martell, S.J.D., 2004. Fisheries Ecology and Management. [[Princeton University Press]], Princeton, 399 p.
- Christensen, V. and Booth, S., 2006. Ecosystem modeling of dioxin distribution patterns in the marine environment. Chapter 6. In: J. Alder and D. Pauly (Editor), On the multiple uses of small [[pelagic fish]]es: from ecosystems to markets. UBC Fisheries Centre [[Research report. Research Reports]] 14(3). Fisheries Centre, University of British Columbia [ISSN 1198-6727], Vancouver
- (2018). "Ecotracer: analyzing concentration of contaminants and radioisotopes in an aquatic spatial-dynamic food web model". Journal of Environmental Radioactivity.
- (2006). "Ecosystem models show combined effects of fishing, predation, competition, and ocean productivity on Steller sea lions (Eumetopias jubatus) in Alaska". Canadian Journal of Fisheries and Aquatic Sciences.
- (2014). "Representing Variable Habitat Quality in a Spatial Food Web Model". Ecosystems.
- (2013). "Bridging the gap between ecosystem modeling tools and geographic information systems: Driving a food web model with external spatial–temporal data". Ecological Modelling.
- Christensen, V. and Lai, S., 2007. Ecopath with Ecosim 6: the sequel. The [[Sea Around Us Project]] Newsletter, 43:1-4 (September–October).
- (January 2016). "Ecopath with Ecosim as a model-building toolbox: Source code capabilities, extensions, and variations". Ecological Modelling.
- (2016). "Best practice in Ecopath with Ecosim food-web models for ecosystem-based management". Ecological Modelling.
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