Changelog
Version 2.1.0 includes some minor modifications
and bug fixes mainly relating to the addition of a parameter to control the wellmixedness of the inshore zone.
Version 2.0.0 includes a change to the handling of prey
selection by omnivorous zooplankton, and some minor modifications and bug fixes.
In 1.0.0 a method for zooplankton switching between preference for phytoplankton and detritus was implemented. Subsequent investigation showed that this was an un-necessary complication. So, in 2.0.0 preference coefficients have been reverted to the original fixed values. This required reoptimization of the ecology parameters for the Barents Sea model included in the package.
Additional data on ice algae biomass included in the target dataset for optimization.
Modifications to the Monte Carlo function to take account of the removal of two parameters due to the zooplankton feeding preference (above). In addition, all parameters which are fixed and not subject to optimization are now included in teh MC process. Improvement of the graphical display for Monte Carlo parameter intervals.
Version 2.0.0 was used to generate outputs for the revised publication: Heath, M.R., Benkort, D., Brierley, A.S., Daewel, U., Laverick, J.H., Proud R. and Speirs, D.C. Ecosystem approach to harvesting in the Arctic: walking the tightrope between exploitation and conservation in the Barents Sea. Ambio, Special issue: Changing Arctic Ocean (accepted August 2021).
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Version 1.0.0 was developed from StrathE2E2 version 3.3.0. The latter is a food web/ecosystem model for temperate shelf seas. StrathE2EPolar is designed for polar shelf sea which are affected by sea ice. The development includes:
Addition of time-varying ice extent, cover and thickness, and air temperature data to the list of driving data.
Addition of state variables to represent nutrients, detritus and algae in the ice, and their connections to the rest of the food web.
Addition of state variables to represent the dynamics of maritime mammals (polar bears).
Addition of representation of ice-depenedency of feeding and active migrations by top predators.
Version 1.0.0 contributes to the submitted publication: Heath, M.R., Benkort, D., Brierley, A.S., Daewel, U., Laverick, J.H., Proud R. and Speirs, D.C. Ecosystem approach to harvesting the changing Arctic: walking the tightrope between exploitation and conservation. Ambio, Special issue: Changing Arctic Ocean (submitted April 2021).