What are the global and Indian patterns of biodiversity What do you mean by a hot spot of diversity?

A biodiversity hotspot is a biogeographic region that is both a significant reservoir of biodiversity and is threatened with destruction. The term biodiversity hotspot specifically refers to 25 biologically rich areas around the world that have lost at least 70 percent of their original habitat.

What are the global and Indian pattern of biodiversity?

It says that the species richness increases as we go from poles to the tropics. But in deserts , Tropical region is rich in species diversity. For example – Columbia has 1400 bird species where as India has 1200 bird species. Moreover Tropical Forest has greater species diversity than temperate forest.

What do you mean by hot spots of biodiversity?

A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation. … Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet’s surface, however, the area defined as hotspots covers a much larger proportion of the land.

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Which is a global biodiversity hotspot in India?

Officially, four out of the 36 Biodiversity Hotspots in the world are present in India: the Himalayas, the Western Ghats, the Indo-Burma region and the Sundaland. To these may be added the Sundarbans and the Terrai-Duar Savannah grasslands for their unique foliage and animal species.

How many hotspots of biodiversity are there in India & in the world?

Note: 1) India is one of the world’s most biodiverse regions. It consists of four biodiversity hotspots, namely, the Himalayas, the Western Ghats, the Indo-Burma region, and the Sunderland (Including Nicobar group of Islands). These 4 hotspots have numerous endemic species.

What is global pattern of biodiversity?

Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas Polar Regions support fewer species.

What do you mean by patterns of biodiversity?

Biodiversity pattern in species is understanding that the number of species found on Earth vary globally, locally as well as with time. Many variations can be present within species, biomes, ecosystems and a particular area.

Why are hotspots seen as being so critical to global biodiversity?

Why are hotspots seen as being so critical to global biodiversity? because an exceptional percentage of earth’s plant and animal species live in these locations. because the plants and animal species that live in these places cannot be found nowhere else in the world. Q.

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What is biodiversity hotspot Why is India?

An area is known as a hotspot if it contains at least 0.5 per cent of endemic plant species. India is considered a mega-diversity hotspot due to the great diversity of organisms found here, ranging from eastern to western ghats to northern and southern India as well. Mainly Western ghats are now at high risk.

Where are the biodiversity hotspots in the world?

Tropical forests are typically biodiversity hotspots and are usually filled with endemic species. The Upper Amazonia/Guyana Shield, the Congo Basin, and the New Guinea/Melanesian Islands have the highest number of endemic terrestrial (land-living) species on Earth [6].

What are hotspots and explain the spots of India?

Biodiversity Hotspots in India – Himalayas, Indo-Burma, Western Ghats & Sundaland. … Coined by Norman Myers, the term “Biodiversity hotspots” can be defined as the regions which are known for their high species richness and endemism.

Which are the Biodiversity hotspots in India what are the threats they face?

Recent extreme events such as the Indian Ocean tsunami have caused tremendous loss of forest cover in Andaman and Nicobar Islands, which form part of Indo-Burma and Sundaland hotspots7. Threats such as invasive alien species, forest fires, and droughts put undue stress on the vegetation of these hotspots.

How many Biodiversity hotspots are there in India in 2021?

Biodiversity Hotspots in India are four in number. Across the world, 36 areas qualify as Biodiversity hotspots.