Zeluno Series · Prelims + Mains 2026
Environment & Ecology
Part II — Biodiversity
pg. 082
05
Chapter Five · Part II: Biodiversity & Conservation
Indian Biodiversity & Protected Area Network
India's biogeographical tapestry — zones, legal categories, and the layered architecture of conservation areas.
Biogeographic Zones
National Parks vs WLS ★+3
Biosphere Reserves + MAB ★+3
Conservation Reserves
Community Reserves
Sacred Groves
5.1 India's Biogeographical Classification Map-Based
India's extraordinary biological wealth is a product of its geological history, climatic gradients, and the convergence of four major biogeographic realms. The Wildlife Institute of India (WII) classifies India into 10 biogeographic zones and 25 biotic provinces (Rodgers & Panwar, 1988 — the definitive classification used in UPSC contexts). This framework underpins Protected Area design, wildlife corridor planning, and India's National Biodiversity Action Plan.
▸ India's 10 Biogeographic Zones — WII Classification (Rodgers & Panwar, 1988)
Fig 5.1 — Schematic representation of India's 10 Biogeographic Zones · WII Classification, Rodgers & Panwar, 1988 · Zeluno ©
Zone 01
Trans-Himalayan
Ladakh, N. Sikkim, HP (Lahaul-Spiti)
Cold desert plateau. Snow Leopard, Tibetan Wild Ass (Kiang), Chiru, Yak. High altitude steppes.
Zone 02
Himalayan
J&K, HP, Uttarakhand, Sikkim, Arunachal
Altitudinal zonation. Brown Bear, Red Panda, Musk Deer, Western Tragopan. Coniferous + alpine meadows.
Zone 03
Indian Desert
Rajasthan (Thar), Gujarat (Rann)
Arid scrub. Indian Wild Ass, Great Indian Bustard (Critically Endangered), Desert Fox, Spiny-tailed Lizard.
Zone 04
Semi-Arid
Punjab, Haryana, Gujarat, N. Rajasthan
Dry deciduous & thorn scrub. Indian Wolf, Chinkara, Blackbuck, Lesser Florican. Transitional zone.
Zone 05 ★
Western Ghats
Maharashtra, Goa, Karnataka, Kerala, TN
Biodiversity Hotspot. Lion-tailed Macaque, Nilgiri Tahr, Malabar Giant Squirrel. High endemism (>1600 endemic plant species).
Zone 06
Deccan Plateau
AP, Telangana, Karnataka, MP, Maharashtra
India's largest biozone. Tiger, Leopard, Sloth Bear, Indian Gaur. Dry & moist deciduous forests.
Zone 07
Gangetic Plain
UP, Bihar, West Bengal (plains)
Alluvial floodplains. Gangetic Dolphin (National Aquatic Animal), Gharial, One-horned Rhinoceros. Highly modified, agriculture-dominated.
Zone 08 ★
NE India & Hills
Assam, Meghalaya, Manipur, Nagaland, Mizoram
Hotspot transition zone. Hoolock Gibbon, Clouded Leopard, Red Panda. Highest rainfall, extremely rich flora.
Zone 09
Coasts & Islands
All coastal states; Lakshadweep, A&N
Coral reefs, mangroves, sandy beaches. Sea Turtles (5 species), Dugong, Saltwater Crocodile, Reef fish.
Zone 10
Andaman & Nicobar
A&N Island group (Bay of Bengal)
Island biogeography. Nicobar Megapode, Andaman Wild Pig, high marine endemism. Sundaland Hotspot overlap.
106
National Parks
Highest protection under WPA
573
Sanctuaries
Wildlife Sanctuaries, 2024
18
Biosphere Reserves
12 in UNESCO MAB Network
100+
Conservation Res.
WPA 2002 Amendment
60+
Community Res.
Community-managed areas
5.2 National Parks vs. Wildlife Sanctuaries +3 Marks ⚠ Most Confused
Both National Parks and Wildlife Sanctuaries are governed by the Wildlife Protection Act, 1972 (WPA), but they differ fundamentally in their degree of protection, permissible activities, and administrative process. This distinction is one of the most frequently tested legal differences in UPSC Prelims — especially because popular wildlife areas like Corbett and Kaziranga are National Parks, while equally famous areas like Bharatpur (now NP) were once Sanctuaries.
▸ India's Protected Area Network — Legal Hierarchy under WPA 1972
National Park
WPA 1972 · Sections 35–38
Highest level of protection. No human habitation, grazing, or forestry permitted inside. Boundaries fixed by the State Legislature — cannot be altered without legislative approval. Private land within boundaries must be acquired. Declared by State Government; Central Government can declare as well.
Examples: Corbett (1936, first NP), Kaziranga, Gir, Sundarbans NP, Valley of Flowers
Examples: Corbett (1936, first NP), Kaziranga, Gir, Sundarbans NP, Valley of Flowers
106
Total in India
2024
2024
Wildlife Sanctuary
WPA 1972 · Section 26–33A
Moderate protection. Human activities like collection of minor forest produce, limited grazing, and certain regulated operations may be permitted with Chief Wildlife Warden's approval. Boundaries can be altered by State Government (no legislative approval needed). Private rights within may continue.
Examples: Chilika (Odisha), Vedanthangal (Tamil Nadu), Periyar (before NP status)
Examples: Chilika (Odisha), Vedanthangal (Tamil Nadu), Periyar (before NP status)
573
Total in India
2024
2024
Biosphere Reserve
UNESCO MAB Programme · MoEFCC
Multi-use landscape with 3 zones. Not under WPA directly — declared by Central Government under MoEFCC. Contains core (strict), buffer (research), and transition (human use) zones. Overlaps with NPs and Sanctuaries. Focus on sustainable use + conservation.
Examples: Nilgiri (first, 1986), Sundarbans BR, Gulf of Mannar, Nanda Devi
Examples: Nilgiri (first, 1986), Sundarbans BR, Gulf of Mannar, Nanda Devi
18
Total / 12 in
UNESCO MAB
UNESCO MAB
Conservation Reserve
WPA 1972 · Sections 36A–36D (2002 Amendment)
Buffer/corridor protection on government land. Declared by State Government on government or community land where communities have traditional rights. A Conservation Reserve Management Committee governs it. Introduced by WPA Amendment 2002 to plug gaps in PAN.
Examples: Aghanashini Lion-tailed Macaque CR (Karnataka), Corbett buffer areas
Examples: Aghanashini Lion-tailed Macaque CR (Karnataka), Corbett buffer areas
100+
Across
India
India
Community Reserve
WPA 1972 · Sections 36C–36D (2002 Amendment)
Community-initiated conservation on private/community land. Proposed by local community — State Government declares on request. Governed by a Community Reserve Management Committee with community representation. Recognises traditional rights + conservation ethic.
Examples: Aravari River Basin CR (Rajasthan), Amrabad (Telangana — upgraded to Tiger Reserve)
Examples: Aravari River Basin CR (Rajasthan), Amrabad (Telangana — upgraded to Tiger Reserve)
60+
Across
India
India
🏞️ National Park
🌿 Wildlife Sanctuary
Governing Section
Sections 35–38, WPA 1972
Sections 26–33A, WPA 1972
Level of Protection
Highest. Absolute — no human activity without CG permission
Moderate. Some regulated activities allowed with CWLW approval
Human Activities
No grazing, no timber, no settlement, no cultivation inside
Limited grazing, NTFP collection may be permitted by CWLW
Boundary Change
Only by State Legislature — highest legal safeguard
State Government can alter — lower safeguard
Private Rights
Must be settled (extinguished) before declaration
Private rights may continue with regulation
Declared By
State Government (Central Govt. also empowered)
State Government only
Tourism
Permitted in designated zones with strict regulation
Permitted with relatively more flexibility
Examples (India)
Corbett, Kaziranga, Gir, Sundarbans, Valley of Flowers, Kanha, Ranthambore
Vedanthangal, Chilika, Manas WLS, Nallamala, Bhitarkanika (also MNP)
★ UPSC Trap — The Boundary Amendment Rule
The single most-tested legal distinction: National Park boundaries can ONLY be changed by the State Legislature (law passed in Assembly). Wildlife Sanctuary boundaries can be changed by the State Government (executive notification). This makes NPs legally more secure than Sanctuaries.
A corollary tested repeatedly: No grazing is permitted inside a National Park at all (even for traditional communities), but it may be allowed in a Sanctuary at the discretion of the Chief Wildlife Warden. This distinction has appeared in Prelims 2013, 2016, 2020.
A corollary tested repeatedly: No grazing is permitted inside a National Park at all (even for traditional communities), but it may be allowed in a Sanctuary at the discretion of the Chief Wildlife Warden. This distinction has appeared in Prelims 2013, 2016, 2020.
5.3 Biosphere Reserves & the MAB Programme +3 Marks 2026 Priority
A Biosphere Reserve (BR) is a unique conservation category — it does not seek to exclude humans but to integrate them into a sustainable conservation framework. Declared under the UNESCO Man and Biosphere (MAB) Programme (launched 1971), BRs are designed as model regions for reconciling biodiversity conservation with human well-being.
▸ Biosphere Reserve Tri-Zone Architecture — UNESCO MAB Model
Core Zone
Strictly protected · No human interference
Buffer Zone
Research & education · Controlled access
Transition Zone
Human settlements · Sustainable use · Cooperation
Core Zone
Strictly no human activity. Usually a National Park or Wildlife Sanctuary. Maximum ecological integrity. Biodiversity research but minimal disturbance only.
Buffer Zone
Surrounds core. Permits non-destructive research, environmental education, eco-tourism, and low-impact activities. Acts as protective shield for core zone.
Transition / Cooperation Zone
Outer zone with human settlements. Sustainable use of natural resources — agriculture, forestry, fisheries — in harmony with conservation objectives.
India's 18 Biosphere Reserves — Including 12 UNESCO MAB Network Sites
| # | Biosphere Reserve | State(s) | Year | UNESCO MAB Status | Key Feature / UPSC Hook |
|---|---|---|---|---|---|
| 01 | Nilgiri | Tamil Nadu, Karnataka, Kerala | 1986 | UNESCO 2000 | First BR of India. Lion-tailed Macaque, Toda tribe |
| 02 | Nanda Devi | Uttarakhand | 1988 | UNESCO 2004 | World Heritage Site + BR. High Himalayan wilderness |
| 03 | Nokrek | Meghalaya | 1988 | UNESCO 2009 | Red Panda, Citrus gene pool centre |
| 04 | Manas | Assam | 1989 | UNESCO 2001 | Golden Langur, Pygmy Hog. World Heritage Site |
| 05 | Sundarbans | West Bengal | 1989 | UNESCO 2001 | Largest mangrove delta. Royal Bengal Tiger |
| 06 | Gulf of Mannar | Tamil Nadu | 1989 | UNESCO 2001 | First Marine BR. Dugong, 3,600+ species |
| 07 | Great Nicobar | A&N Islands | 1989 | UNESCO 2013 | Saltwater Crocodile, Leatherback Turtle. Tribal Shompen community |
| 08 | Simlipal | Odisha | 1994 | UNESCO 2009 | Tiger, Elephant, Baiga tribe. Also Tiger Reserve |
| 09 | Dibru-Saikhowa | Assam | 1999 | — | Feral horses, Gangetic Dolphin, Hoolock Gibbon |
| 10 | Dehang-Dibang | Arunachal Pradesh | 1998 | — | Snow Leopard, Adi & Idu Mishmi tribes |
| 11 | Pachmarhi | Madhya Pradesh | 1999 | UNESCO 2009 | "Queen of Satpura." Satpura Tiger Reserve within |
| 12 | Agasthyamalai | Tamil Nadu, Kerala | 2001 | UNESCO 2016 | Kani tribe, highest endemic plants in India |
| 13 | Achanakmar-Amarkantak | MP, Chhattisgarh | 2005 | UNESCO 2012 | Source of Narmada river. Baiga tribe |
| 14 | Kachchh | Gujarat | 2008 | — | Indian Wild Ass, Flamingos, Rann of Kutch |
| 15 | Cold Desert | Himachal Pradesh | 2009 | — | Snow Leopard, Spiti Valley trans-Himalayan ecosystem |
| 16 | Seshachalam | Andhra Pradesh | 2010 | — | Slender Loris, Chenchu tribe |
| 17 | Panna | Madhya Pradesh | 2011 | UNESCO 2020 | Ken river, Tiger reintroduction success story |
| 18 | Khangchendzonga | Sikkim | 2016 | UNESCO 2018 | Newest BR. World Heritage Site. Snow Leopard, Lepcha tribe |
🔬 MAB Programme — Key Facts for UPSC
UNESCO MAB Programme was launched in 1971. India joined in 1973. Of India's 18 Biosphere Reserves, 12 are in the UNESCO World Network of Biosphere Reserves (WNBR).
Nilgiri = First BR (1986) and First Indian BR in UNESCO MAB (2000). Gulf of Mannar = First Marine BR. Khangchendzonga (2016) = Newest and the only BR that is also a UNESCO World Heritage Site.
BRs are NOT under WPA 1972 — they are declared by the Central Government under MoEFCC administrative orders. This is a key legal distinction from National Parks and Sanctuaries.
Nilgiri = First BR (1986) and First Indian BR in UNESCO MAB (2000). Gulf of Mannar = First Marine BR. Khangchendzonga (2016) = Newest and the only BR that is also a UNESCO World Heritage Site.
BRs are NOT under WPA 1972 — they are declared by the Central Government under MoEFCC administrative orders. This is a key legal distinction from National Parks and Sanctuaries.
5.4 Conservation Reserves, Community Reserves & Sacred Groves
Conservation Reserve
WPA 1972, Sec. 36A–36D · Added 2002
What
Protected area on government-owned land adjacent to/between NPs or Sanctuaries. Fills connectivity gaps — designed as corridors and buffer zones.
Who Declares
State Government after consulting local communities. Managed by Conservation Reserve Management Committee (CRMC).
Activities
Existing rights of communities continue. Some regulated use permitted. No new commercial exploitation.
Examples
Aghanashini CR (Karnataka), Bhadra CR, Goa's Netravali CR, Corbett buffer zones in Uttarakhand.
Community Reserve
WPA 1972, Sec. 36C–36D · Added 2002
What
Protected area on private or community land. The most participatory category — proposed by the community itself, not imposed by government.
Who Declares
State Government on community request. Managed entirely by Community Reserve Management Committee (no government body can override).
Community Rights
Traditional rights fully protected. Community decides management rules. Government cannot acquire the land.
Examples
Aravari River Basin CR (Rajasthan — Tarun Bharat Sangh model). Kadalundi-Vallikunnu CR (Kerala — migratory birds).
Sacred Groves
Traditional / Cultural — No Formal Legal Status
What
Forest patches protected by local communities through religious and cultural traditions. Considered abodes of deities — no cutting, hunting, or extraction allowed within. Among the world's oldest community conservation systems.
India's Sacred Groves
~1 lakh (100,000) sacred groves across India. Known by regional names:
• Dev Vans / Dev Bhumi (HP, Uttarakhand)
• Orans (Rajasthan — Bishnoi community)
• Kavu (Kerala — temple forest)
• Sarna / Jaher (Jharkhand, Odisha — Adivasi)
• Devara Kadus (Karnataka)
• Sarnas (West Bengal)
• Dev Vans / Dev Bhumi (HP, Uttarakhand)
• Orans (Rajasthan — Bishnoi community)
• Kavu (Kerala — temple forest)
• Sarna / Jaher (Jharkhand, Odisha — Adivasi)
• Devara Kadus (Karnataka)
• Sarnas (West Bengal)
Ecological Value
Harbour rare and endangered species. Maintain local watersheds. Preserve pre-forest-clearance species assemblages. High endemism documented in Kerala Kavus and Rajasthan Orans.
Threats
Decline of traditional beliefs, land-use pressure, absence of legal protection. Some states like Kerala have begun mapping and providing limited legal recognition.
🌳 Sacred Groves — UPSC Mains GS-1 Link
Sacred groves represent the finest example of traditional ecological knowledge (TEK) meeting biodiversity conservation. They demonstrate that in-situ conservation need not be state-led — community belief systems can achieve the same outcome. In GS-1 (Art & Culture / Society), sacred groves appear under "tribal traditions and conservation." In GS-3 (Environment), they appear as examples of community-based conservation and contrast with the colonial "fortress conservation" model. The Bishnoi community of Rajasthan (who died protecting Khejri trees in the Amrita Devi Bishnoi movement, 1730) is the most cited historical example of community conservation ethics in UPSC answers.