The classification of ecosystems combines information on land cover, elevation and 'rugosity' (i.e. level of disturbance of the land]. This results in maps identifying different types of ecosystems. Various sets of information that are more precise may be combined with these maps, as far as the information is available. In so far as information on the biodiversity exists the MEGS could also help establish links between biodiversity and the availability of resources/services but it must be pointed out that in Canada, at this stage, there is a lack of information on biodiversity.