The ecowin2000 model

EcoWin2000 is an ecological model for aquatic systems, developed using an object-oriented approach. It resolves hydrodynamics, biogeochemistry and can incorporate population dynamics for target species. The various components consist of a series of self-contained objects, rather than multiple sub-models.

The EcoWin2000 model consists of two basic parts: a shell module and “ecological” objects. The shell is responsible for communication with the various objects, for interfacing with the user, supplying model outputs and general maintenance tasks.

Object Sample attributes Typical active methods Typical passive methods
Transport Salt Advection-diffusion  
Dissolved substances Forms of DIN, PO43-, SiO2, D.O. Nitrification, formation of particulates Mineralization of detritus, exsudation
Phytoplankton Phytoplankton, toxic algae Production, respiration, senescense, exsudation, production of toxins Grazing by zooplankton, fish, benthic filter feeders
Phytobenthos Microalgae, macroalgae, salt marsh flora Production, respiration, senescence Grazing by zooplankton, fish, harvesting of seaweeds
Zooplankton Zooplankton, copepods Eat, grow reproduce, excrete, natural mortality, swim, settle (for benthic larvae) Predation by other objects and within the object
Zoobenthos Filter-feeders, deposit-feeders Filter, grow, reproduce, excrete, natural mortality, swim, settle (for benthic larvae) Fisheries, predation by several other objects
Nekton Fish, large-invertebrates (e.g. Sepia) Hunt (including select), grow, reproduce, excrete, natural mortality, swim, migrate Fisheries, hunting by birds
Man Various socio-economic attributes Seed and harvest shellfish  

 

Each object groups together related state variables, and may at any time be extended to contain a new state variable without affecting the code of any other part of EcoWin2000. Similarly, the methods which control interactions among state variables within objects may be easily changed, due to inheritance (which is a property of object-oriented programming languages).

  • EcoWin2000 uses a range of equations depending on the application requirements.
  • A research model to examine nutrient loading and aquaculture development scenarios.
  • Extensively tested and is a potentially useful tool for supporting an ecosystem approach to sustainable aquaculture development.

 

In the SMILE project, the EcoWin2000 modelling platform was used to implement an ecological model for each northern Irish lough to estimate carrying capacity using appropriate biogeochemistry and population dynamics. The main features modelled for these systems were the hydrodynamics, suspended matter transport, nitrogen cycle, phytoplankton and detrital dynamics, shellfish growth and human interaction.

Terms of Use and Disclaimer

The EcoWin2000 model uses state-of-the-art equations in order to determine carrying capacity. However, the authors cannot accept any liability for losses or consequential damages due to its application.

Contact

For information regarding the EcoWin2000 model or any other related question, please contact info@longline.co.uk