As habitats are fragmented and destroyed, many species become extinct. Habitats are destroyed without being studied. And ignorance about species and ecosystems contributes to species extinction. Large, visible species of mammals, birds and plants make up fewer than five percent of the world's species. The world's rainforests are located in these countries.
Coral reefs are habitats of unparalleled biotic richness.
Remote islands such as Hawaii have unique flora because evolution takes place there in isolation. Fewer species are grown today than in the past. Genetic diversity is declining. Zoos and parks are traditional strategies for protecting biodiversity and have helped preserve many species. However, new strategies are needed to address the root causes of biodiversity loss.