Biodiversity Hotspot | Factors leading to Hotspots

A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened with destruction. For example forests are considered as biodiversity hotspots. On listed world 34/35 biodiversity hotspots are present. Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[1] & 1990[2] revised after thorough analysis by Myers and others in “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[3] and a paper published in the journal Nature.[4]
To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[4] Around the world, 35 areas qualify under this definition.[5] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics.
SOURCE : en.wikipedia.org/wiki/Biodiversity_hotspot