A biogeographic region with significant reservoir of biodiversity that is under threat from humans is called as

A biogeographic region characterized by a significant reservoir of biodiversity that is under threat from human activities is defined as a biodiversity hotspot. The concept was pioneered by Norman Myers to identify areas of high conservation priority based on species richness, high endemism, and significant threat levels [1]. To qualify as a hotspot, a region must meet two strict criteria: it must contain at least 1,500 species of vascular plants as endemics (found nowhere else) and must have lost at least 70% of its original primary vegetation [1]. These regions are considered the most biologically rich yet threatened terrestrial areas on Earth. Currently, there are 36 recognized biodiversity hotspots globally, which are prioritized for conservation efforts to prevent substantial global biodiversity decline. Other terms like 'bioendangered region' are not standard scientific designations in this context.

Sources

1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 4: BIODIVERSITY > BIodIversIty Hotspots. > p. 5