Just 3 per cent of the land on Earth is still ecologically intact

A group of cheetahs in the Serengeti National Park, Tanzania


Most of Earth’s terrestrial habitats have lost their ecological integrity, including areas previously categorised as being intact.

Ecological integrity encompasses three measures of intactness. Habitat intactness is a measure of the extent to which people have made changes to the land, faunal intactness is a measure of the number of animal species lost from a habitat, and functional intactness measures the degree of functional densities of fauna, that is whether there are enough animals of individual species to effectively play their part in a functioning…

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