| Summary: | The recent strategies of management of wetlands, aiming to maintenance or to the reconquest of these ecosystems, focus on the ecosystemic functions - translated into terms of ecosystems services according to the Millenium Ecosystem Assesment conceptual Framework - on the one hand, and by underlining more and more strongly on the other hand the values, in particular the heritage values, that we can recognize to them; this approach, broadly utilitarian, asks the question of the natural environment readjustement potentiality and de facto requires to interpret their(s) “trajectories” put rhythm into by biophysics and humans dynamics, which have temporalities and spatialities quite complex and intricate. This article proposes a thought on the use and the effectiveness of the concepts and methods of the environmental geohistory use to identify and to highlight the « memory(ies) » of wetlands, here in fluvial contexts. However, the environmental history is discontinuous by nature, it always contains a share of lapse of memory, and often reconstitutes a idealized past for which it is advisable to gain in neutrality but by which glances… it is the today challenge for reasoned management of ecosystems.
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