Searching for "biodiversity" on the web produces an overwhelming amount of hits.While wetland, marine and coastal habitats, and forests are well represented, it seems that mountain ecosystems receive little attention.Some recent initiatives have been taken to preserve biodiversity in mountain environments and promote activities focusing on sustainable development and conservation.The following web sites were chosen because of their significance or the originality of their approach.The list makes no claim to comprehensiveness.It can be accessed via MRD's web site, www.MRD-journal.org. Development'Mountain biodiversity at risk'