We all have become aware of the essential contribution of ecosystems to the human welfare. This is a strong driver for taking into account ecosystem services within decision processes. But the connection between ecosystems and theirs services is frequently neither readily apparent nor easy to...

This note investigates the methodological conditions necessary to a fair deal between conservation and conversion of wetlands. We consider conversion cases to agriculture and industrial uses. In this latest situation, one could think that it is not possible to rely on conservation benefit...