Why are EDGE species particularly highlighted in conservation efforts?

EDGE species, which stands for Evolutionarily Distinct and Globally Endangered species, are particularly highlighted in conservation efforts due to their unique evolutionary significance and the fact that many are critically endangered. These species often represent entire branches of the tree of life; their loss would mean the extinction of unique genetic lines that carry distinct adaptations and ecological roles. Focusing conservation resources on EDGE species helps protect the planet's biodiversity because it prioritizes those species that are not only at risk of extinction but also essential to maintaining the evolutionary diversity of ecosystems. Their conservation can facilitate broader ecological stability, since the extinction of such species can have cascading effects throughout their ecosystems. Thus, investing in EDGE species is crucial for preserving the overall health and resilience of the environment.