What would happen if we did not intervene? What is the underlying development trajectory? What are the principal drivers of change? It is vital to get the correct answers to these questions. Modelling can help. Normally only a small number of drivers of change are significant at any one time. We have to know which ones they are and how they can be influenced.132
We must also understand the underlying processes of ecological succession.133 The factors that influence restoration at a single location are not necessarily confined to that place. A variety of extrasectoral influences such as economic and trade policies and levels of public understanding of issues will have a continuing and variable influence on restoration processes.
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