Table 1.
ODD for the system dynamic models of the Galapagos Islands
| Variable | GF-ABM | SDGI |
| Type | ABM | DSMs |
| Purpose | Simulate the decision-making processes of Fishers in the Galapagos Islands with regards to employment choices and an alternate household livelihood strategy that would move those qualified into tourism (full- or part-time), given a variety of circumstances, desires, and personal characteristics. | Generate future scenarios of human–environment interactions with a particular focus on the forces of change in tourism and residential growth, environmental degradation, and household demographics and community infrastructure variables. |
| State Variable and Scale | Employment in Fisheries, Government, and Tourism | Invasive Species |
| Household Demographics and Change | Number and Capacity of Terrestrial/Marine Visitation Sites | |
| Household Expenses, Income, and Wealth | Environmental Degradation | |
| Social Networks: Influence and Connectivity | Energy Consumption | |
| Fisheries Season for Lobster and Sea Cucumber | Land Use Patterns and Change | |
| Boat Access, Ownership, and Sailing Certification | Interisland Transportation | |
| Mainland-to-Island Transportation | ||
| Individual and Household Levels | Hotel Occupancy Rate | |
| Community Infrastructure | ||
| Archipelago Level | ||
| Process Overview and Scheduling | Time Step: Annual Updating | Time Step: Monthly Updating |
| Process: coupled human–natural systems to simulate decision-making processes of fishers relative to the pushes out of fishing and pulls into tourism and government employment, given expenses, income, wealth, and preparation for alternate employment possibilities. | Process: population growth, including natural residential growth and in-migration, drives changes in different components of the Galapagos social and environmental system, with community infrastructure, transportation, environmental quality, and household demographics affecting human–environment interactions. | |
| Design Concepts | Human–Environment Interactions and Complexity | Human–Environment Interactions |
| Household Livelihood Theory | Carrying Capacity | |
| Emergence of Employment Opportunities | Evolution of a Tourism Destination | |
| Input Data | Household Survey Data | Official Entry Form of Tourism 1979–2013 |
| Cadastral Data | Census Data at the Block Level | |
| Number of Licensed Fishers | Urban Cadastral Maps | |
| Census Data at the Block Level | Official Records for Energy Use and Waste Production | |
| Job Opportunities by Employment Sectors | Statistics on Transportation | |
| Submodels | Demographic Change at the Household Level | Invasive Species |
| Employment Management | Capacity of Visitation Sites | |
| Fisher Skills Change | Environmental Quality and Degradation | |
| Number and Distribution of Jobs | Energy Consumption | |
| Fisher and Household Expenses, Income, and Wealth | Land Use Change | |
| Fisher and Household Connectivity Through Social Networks | Interisland Transportation | |
| Mainland–Islands Transportation | ||
| Hotel Occupancy Rates | ||
| Reference | Walsh and Mena (7, 8) | Pizzitutti et al. (23) |