Feedback loops added to four conceptual models linking land change with driving forces and actors.

Although we appreciate the efforts to develop a functional taxonomy of models of land use change, driving forces, and actors, we miss an important class: models with feedback from the consequences of land use change to actors, to driving forces, and/ or both. Because the primary societal reason for a scientific analysis of changes in land cover is the consequences of land cover change on a wide range of stakeholder interests and the various ways stakeholders can try to modify land cover change in their favor, the utility of the conceptual models will depend strongly on the type of entry points the models provide for feedback (Fig. 1).