Changes between Version 1 and Version 2 of EwEugRunEcospace
- Timestamp:
- 2010-11-23 03:18:38 (13 years ago)
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EwEugRunEcospace
v1 v2 2 2 The business of Ecospace is predicting distributions. Its main outputs are distribution maps, one for each ecosystem component. Here, positive deviations (biomass increases) from the Ecopath baseline levels are shown in red, and negative deviation (decrease) in blue (see colour scale on right of panel representing map. 3 3 4 Ecospace runs thus imply the display of a succession of maps, one per iteration and group. Usually, the features of these maps will be gradually converging toward some stable equilibrium distribution. Alternatively these maps may regularly ‘flip’between two states, suggesting some sort of dynamic equilibrium.4 Ecospace runs thus imply the display of a succession of maps, one per iteration and group. Usually, the features of these maps will be gradually converging toward some stable equilibrium distribution. Alternatively these maps may regularly 'flip' between two states, suggesting some sort of dynamic equilibrium. 5 5 6 6 Which of these alternative occurs can be seen more clearly from the time plot (the small panel to the mid left of the Ecospace run window), which traces the progress of the run. … … 12 12 '''Fishing effort''' 13 13 14 Show distribution of fishing effort over space for each of the fleets. In Ecospace, fishing effort is assigned to spatial cells through a ‘gravity model’, wherein effort is proportional to the net benefits gained from exploiting a given cell.14 Show distribution of fishing effort over space for each of the fleets. In Ecospace, fishing effort is assigned to spatial cells through a 'gravity model', wherein effort is proportional to the net benefits gained from exploiting a given cell. 15 15 16 16 In the simple case that all exploited group have the same economic value (default = 1 monetary unit per tonne), and that all cells require the same sailing cost (default), fishing effort will be assigned to the (water) cells of the base map in proportion to their fishable biomass. 17 17 18 Thus, for example, fishing effort will tend to concentrate at the edges of protected areas –one reason, incidentally, why these edges should be as short as possible.18 Thus, for example, fishing effort will tend to concentrate at the edges of protected areas - one reason, incidentally, why these edges should be as short as possible. 19 19 20 20 '''Show all''' … … 46 46 '''Run''' 47 47 48 Start the run. Will change to ‘Stop’ once pressed, and to ‘Run’again at the end of the run48 Start the run. Will change to 'Stop' once pressed, and to 'Run' again at the end of the run 49 49 50 50 '''Pause''' … … 54 54 '''Results''' 55 55 56 Will display a summary of the results for the Start and End times set on the [wiki:EwEugEcospaceParameters Ecospace parameters] form. Results are averaged in the start and end year, i.e., when Ecospace reaches the Start time it will average results over the next number of 'timesteps (set in ''Summary timesteps'' on the ''Ecospace parameters'' form)'. Similarly, when it reaches the End time it will average over the next same number of timesteps.56 Will display a summary of the results for the Start and End times set on the [wiki:EwEugEcospaceParameters Ecospace parameters] form. Results are averaged in the start and end year, i.e., when Ecospace reaches the Start time it will average results over the next number of timesteps (set in ''Summary timesteps'' on the ''Ecospace parameters'' form). Similarly, when it reaches the End time it will average over the next same number of timesteps. 57 57 58 58 '''Overlay'''
