Many of the world's ecosystems are in danger and might not support future generations unless radical measures are implemented to protect and revive them, according to the most comprehensive analysis ever conducted of how the world's oceans, dry lands, forests and species interact and depend on one another.

The new report collates research from many specific locales to create the first global snapshot of ecosystems. More than 1,300 authors from 95 countries participated in the Millennium Ecosystem Assessment, whose results are being made public today by the United Nations and by several private and public organizations.