Reforestation, successions of vegetation and model of the linear dynamics of forest growth

Abstract

The abandoning of agricultural land and the consequent natural reforestation has been the main contributory factor in a significant increase in the wooded areas in France. The dynamics of these extensions can be evidenced by a study of plant successions. There are many theories regarding plant successions. We will limit our presentation to the basic concepts, categorised according to two approaches: a systemic approach on the one hand, and on the other hand, listing in order of importance, for each structural level of plant cover, the processes and factors which contribute to the forest dynamics. Using examples, we will attempt to highlight the most practical operational theories and the methods, which allow us to analyse and explain (at least partially) the dynamic phenomena (especially those concerning ligneous species). Finally, we will present some results, which we have selected from among the main regional linear forest dynamic models.