Biodiversity hotspots of India

Meaning and criteria

A biodiversity hotspot is a biogeographic region with exceptional endemism and severe habitat loss. The global criteria require at least 1,500 endemic vascular plant species and at least 70% loss of original native vegetation. Hotspot is a conservation-priority designation; it does not itself create a statutory protected area and does not mean every species there is threatened.

Four regions intersect India

Himalaya includes altitudinal ecosystems from foothills to alpine zones, with high endemism, forests, glaciers and high-altitude wetlands. Roads, hydropower, warming, fire and fragmentation pressure it. Indo-Burma covers much of Northeast India and extends into mainland Southeast Asia; it includes forest, river and montane habitats important for primates, birds, orchids and freshwater life. Western Ghats–Sri Lanka includes India’s ancient Western Ghats, a centre of plant, amphibian, reptile and freshwater-fish endemism. Evergreen forest, moist deciduous forest, shola and grassland form mosaics; fragmentation, invasive species, quarrying and altered flows are concerns. Sundaland is represented in India chiefly by the Nicobar Islands, where island endemism and coastal, rainforest and marine systems are vulnerable to invasive species, cyclones, habitat change and sea-level rise.

The Northeast is not one single hotspot: much is Indo-Burma, while Himalayan portions belong to the Himalaya hotspot. A hotspot may cross national borders.

Conservation relevance

Endemic species have restricted ranges, so local damage can cause global extinction. Hotspots are not synonymous with maximum species richness; endemism plus habitat loss is decisive. Corridors, restoration, community stewardship, invasive-species control and landscape planning complement protected areas. In-situ conservation protects species in natural habitat; ex-situ conservation uses seed banks, zoos or botanical gardens.

Prelims tips

Memorise four: Himalaya, Indo-Burma, Western Ghats–Sri Lanka, and Sundaland/Nicobar. Do not list Eastern Ghats as a separate global hotspot. Criteria concern endemic vascular plants and original vegetation loss, not simply threatened animals. Hotspot, biodiversity-rich area, biosphere reserve and Ramsar site are different concepts.

Prelims revision checklist

Identify the definition first, then connect it to the relevant institution, date, process and example. Do not treat a scientific mechanism as a policy instrument, an international label as automatic domestic legal status, or a rank as ownership. Watch absolute words such as “always” and “only”; they are rarely correct unless part of a formal definition. In current-affairs questions, apply the stable principle and verify changing figures or variants from an official source.

Additional recall

For elimination, ask what is being measured, who has authority, and whether the statement describes a mechanism, a legal category or an outcome. Similar terms often differ by scope and timing. A precise answer should preserve the distinction between a broad umbrella concept and its narrower operational example.

Analogy

Biodiversity hotspots of India — Analogy

A hotspot is a library full of rare books whose shelves are being destroyed: its priority comes from unique books and lost habitat, not only from the total number of books.