Biodiversity and Conservation Notes for UPSC

Biodiversity means the variety of all living things on Earth: plants, animals, fungi and microbes, the genes they carry and the ecosystems they form. It gives us food, medicine, clean air, water, fuel and a stable climate. Today, species are disappearing at a very fast rate because of human activity, so biodiversity and its conservation are among the most important topics in the Environment section of the UPSC Civil Services Examination. Prelims asks about hotspots, IUCN categories, in-situ and ex-situ conservation and international conventions, while Mains asks about threats, human-wildlife conflict and policy. This note covers all of it in simple language.

Levels of Biodiversity

Biodiversity is studied at three levels. Genetic diversity is the variety of genes within a species, for example the thousands of rice varieties in India. Species diversity is the variety of species in an area. Ecosystem diversity is the variety of habitats, such as forests, wetlands, deserts and coral reefs. India is one of the 17 megadiverse countries of the world. It has about 2.4 percent of the world's land area but around 8 percent of the world's recorded species. India also has four of the world's biodiversity hotspots.

Biodiversity Hotspots

The concept of hotspots was given by Norman Myers. A region qualifies as a hotspot if it has at least 1,500 species of endemic vascular plants (more than 0.5 percent of the world total) and has lost at least 70 percent of its original habitat. Conservation International identifies hotspots, and there are 36 hotspots in the world today.

Threats to Biodiversity

The main causes of loss are often remembered as "HIPPO": Habitat loss and fragmentation, Invasive species, Pollution, Population growth and Over-exploitation. Habitat destruction by agriculture, mining, roads and dams is the biggest threat. Invasive alien species, such as water hyacinth and Lantana, push out native species. Poaching and illegal wildlife trade threaten tigers, rhinos, pangolins and many others. Climate change is shifting the habitats and causing bleaching of coral reefs. Pollution from plastics, pesticides and chemicals damages food chains. Another concern is co-extinction, where one species disappears because another on which it depends is lost.

Conservation Approaches

In-situ Conservation

This means protecting species in their natural habitat. It includes National Parks, Wildlife Sanctuaries, Conservation Reserves, Community Reserves, Biosphere Reserves and Sacred Groves. India has more than 100 national parks and around 550 wildlife sanctuaries, and 18 Biosphere Reserves. Special projects such as Project Tiger (1973), Project Elephant (1992), the Crocodile Conservation Project and Project Snow Leopard aim to protect flagship species.

Ex-situ Conservation

This means protecting species outside their natural habitat. It includes zoos, botanical gardens, gene banks, seed banks, cryopreservation, tissue culture and captive breeding. The National Bureau of Plant Genetic Resources (NBPGR) in New Delhi keeps the seed gene bank. The Svalbard Global Seed Vault in Norway stores seeds from around the world. Reintroduction, like the translocation of cheetahs to Kuno National Park in Madhya Pradesh, is a recent example of an assisted recovery effort.

IUCN Red List Categories

The International Union for Conservation of Nature (IUCN) maintains the Red List of Threatened Species. The categories are, from low to high risk: Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct. There are also Data Deficient and Not Evaluated. Examples: the Great Indian Bustard and the Ganges River dolphin are classed as Critically Endangered and Endangered respectively, and the tiger as Endangered. In India, the Wildlife (Protection) Act, 1972 has Schedules that decide the level of protection, with Schedule I giving the highest protection and the strictest penalties.

Legal and Institutional Framework in India

The key laws are the Wildlife (Protection) Act, 1972 (amended in 2022 to align with CITES and to rationalise schedules), the Forest Conservation Act, 1980 (now the Van (Sanrakshan Evam Samvardhan) Adhiniyam), the Biological Diversity Act, 2002 and the Forest Rights Act, 2006. The Biological Diversity Act created the National Biodiversity Authority (NBA) in Chennai, State Biodiversity Boards and local Biodiversity Management Committees, and it regulates access to biological resources and sharing of benefits. The Constitution supports conservation through Article 48A (a Directive Principle) and Article 51A(g) (a Fundamental Duty). The National Board for Wildlife is chaired by the Prime Minister.

International Conventions

• Convention on Biological Diversity (CBD), 1992: adopted at the Rio Earth Summit; three goals are conservation, sustainable use and fair sharing of benefits. The Nagoya Protocol deals with access and benefit sharing and the Cartagena Protocol with biosafety. In 2022 the Kunming-Montreal Global Biodiversity Framework set the "30 by 30" target to protect 30 percent of land and sea by 2030.
• CITES, 1973: regulates international trade in endangered species.
• Ramsar Convention, 1971: protects wetlands of international importance.
• CMS (Bonn Convention): protects migratory species.
• World Heritage Convention, 1972: protects natural and cultural sites.

Human-Wildlife Conflict

As forests shrink, animals such as elephants, leopards and tigers move to farms and villages, causing crop damage and loss of human life, and sometimes they are killed in revenge. Solutions include corridors that link habitats, early warning systems, compensation for losses, community participation, better crop insurance and the safe relocation of problem animals. Local people must be treated as partners in conservation, not as enemies. This is the main point to make in a Mains answer.

Why Biodiversity Matters

Biodiversity supports the livelihoods of millions of people, especially forest dwellers and fishers, and gives us the genetic material for new crops and medicines. Pollinators such as bees help in producing a large share of the world's food. Wetlands and mangroves protect coasts from storms and cleanse water. A healthy ecosystem is more stable against disease and climate shocks. In short, protecting nature is not a luxury; it is a base of economic and food security. Present this point as a link between environment and development in your Mains answers.

Biosphere Reserves and Sacred Groves

A Biosphere Reserve is a large protected area that tries to balance conservation with the needs of local people. It is divided into three zones: the core zone, which is strictly protected; the buffer zone, where limited research and eco-friendly activity is allowed; and the transition zone, where people live and work. India's programme is run under the UNESCO Man and the Biosphere (MAB) Programme. Well-known examples are the Nilgiri (the first, set up in 1986), Sundarbans, Nanda Devi, Gulf of Mannar and Great Nicobar reserves. Sacred groves are patches of forest protected by local communities for religious reasons, such as the Khasi hills groves in Meghalaya. They show that traditional knowledge and culture have protected nature for centuries.

Endemic, Keystone and Flagship Species

Some terms are very popular in questions. An endemic species is found only in one region and nowhere else, like the Nilgiri tahr in the Western Ghats. A keystone species has a large effect on its ecosystem compared with its numbers, for example the tiger at the top of the food chain or the fig tree that feeds many birds and animals. A flagship species is a popular animal chosen to attract public support for conservation, like the tiger, elephant and snow leopard. An umbrella species is one whose protection also protects many other species that share its habitat. An indicator species, such as lichens and frogs, shows the health of the environment because it reacts quickly to pollution. Knowing these terms helps you tackle both direct and statement-based questions in Prelims.

How to Link Biodiversity With Current Affairs

Follow the news on tiger counts, cheetah reintroduction, new Ramsar sites, new Biosphere Reserves, and the global meetings of the CBD. For every news item, write down three things: the place, the species or concept, and the law or convention connected with it. Your notes will then work like a ready-made answer bank. In a Mains answer, begin with a short definition, add data and examples, mention the legal or policy tool, and end with a way forward that includes local communities and technology such as camera traps and satellite monitoring.

Quick Revision

• Four Indian hotspots: Himalaya, Indo-Burma, Western Ghats and Sri Lanka, Sundaland.
• Hotspot criteria: 1,500 endemic plants and 70 percent habitat loss.
• In-situ: parks, sanctuaries, biosphere reserves. Ex-situ: zoos, seed banks, gene banks.
• Laws: Wildlife Protection Act 1972, Biological Diversity Act 2002, Forest Rights Act 2006.
• CBD (1992), CITES (1973), Ramsar (1971), CMS (Bonn).

Biodiversity is the foundation of life. Learn the hotspots with a map, memorise the IUCN categories in order, tie each convention to its purpose, and link the whole topic to current news about tigers, cheetahs and wetlands, and this part of the syllabus will become one of your strongest.

Related Notes to Read Next

Continue your preparation with these related notes from the same subject:

• Climate Change and Paris Agreement Notes for UPSC
• Ecosystem and Food Chain Notes for UPSC
• Environmental Pollution Notes for UPSC
• All Environment and Ecology notes

Frequently Asked Questions (FAQ)

What is biodiversity?

Biodiversity is the variety of all life on Earth, including the diversity of genes, species and ecosystems.

What is a biodiversity hotspot?

A hotspot is a region with at least 1,500 endemic vascular plant species that has lost at least 70 percent of its original habitat.

How many biodiversity hotspots are in India?

India has four hotspots: the Himalaya, Indo-Burma, the Western Ghats and Sri Lanka, and Sundaland (Nicobar Islands).

What is the difference between in-situ and ex-situ conservation?

In-situ conservation protects species in their natural habitats, like national parks. Ex-situ conservation protects them outside their habitat, like zoos and seed banks.

What are the IUCN Red List categories?

The main categories are Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct.

What is the Biological Diversity Act, 2002?

It is an Indian law that conserves biodiversity, regulates access to biological resources and ensures fair sharing of benefits. It created the National Biodiversity Authority.

What is the Wildlife Protection Act, 1972?

It is the main Indian law for the protection of wild animals, birds and plants, with schedules that decide the level of protection and punishment.

What is the Convention on Biological Diversity?

CBD is an international treaty of 1992 with the goals of conserving biodiversity, using it sustainably and sharing benefits fairly.

What is CITES?

CITES is a 1973 international agreement that controls the trade in endangered wild animals and plants so that trade does not threaten their survival.

What is the 30 by 30 target?

It is a target of the Kunming-Montreal Global Biodiversity Framework (2022) to protect 30 percent of the world land and sea areas by 2030.

What is Project Tiger?

Project Tiger was launched in 1973 to protect the tiger and its habitat through special tiger reserves managed by the National Tiger Conservation Authority.

What are the main threats to biodiversity?

Habitat loss, invasive species, pollution, climate change, population growth and over-exploitation of resources such as poaching are the main threats.