Biodiversity — hotspots, conservation, endemic species

Biodiversity — Hotspots, Conservation, Endemic Species

Introduction

Biodiversity — the variety of life on Earth at all levels, from genes to ecosystems — is the living foundation of human civilisation. For an aspirant preparing for the Odisha Public Service Commission (OPSC) examination, this subtopic within Current Affairs is not a mere academic exercise. It is a high‑yield, recurring theme that tests both factual recall and conceptual clarity. In the seven previous‑year questions (PYQs) available for this subtopic (spanning OPSC 2019, 2021, 2022, and 2024), every question demanded precise knowledge of dates, locations, classifications, or international instruments. The pattern is clear: OPSC examiners value exactitude over vague familiarity.

Why does this matter? Biodiversity conservation is directly linked to India’s international obligations (Convention on Biological Diversity, CITES, Ramsar), flagship national programmes (Project Tiger, Crocodile Conservation Project), and state‑specific assets (Similipal, Chilika, Bhitarkanika). Moreover, Odisha’s unique ecological profile — from the mangroves of the Mahanadi delta to the dry deciduous forests of the Eastern Ghats — makes it a favourite region for questions. The PYQs show a spread across factual year‑based questions (International Mangrove Day, Crocodile Project initiation year), location‑specific ones (black buck conservation reserve in Allahabad), and conceptual application (OECM recognition, error‑identification in Biosphere Reserves statements).

This chapter will teach you everything needed to ace this subtopic. We begin from first principles: what biodiversity is, why hotspots matter, and how conservation is classified. Then we dive deep into the specific areas tested — endemic species, biosphere reserves, tiger reserves, international conventions, and Odisha‑focused initiatives. Every concept is defined in a blockquote for quick reference. Comparison tables and mnemonics are embedded to aid memorisation. The seven PYQs are treated as worked examples, with detailed walkthroughs. Finally, we analyse the testing pattern, forecast future questions, and list common traps.

By the end, you will not only recall dates and names but also understand the why behind each fact. This is the level of preparation that distinguishes toppers.

Core Concepts & Foundations

Before tackling specific questions, we must build a robust conceptual scaffold. Each term below is defined first‑principles; do not skip any.

Biodiversity: The variability among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems, and the ecological complexes of which they are part. It encompasses three hierarchical levels: genetic (variation within species), species (variety of species), and ecosystem (diversity of habitats and communities). The term was popularised by Walter G. Rosen in 1985.

Biodiversity Hotspot: A biogeographic region that is both a significant reservoir of biodiversity and is threatened with destruction. To qualify, a region must contain at least 1,500 species of endemic vascular plants (0.5% of the world’s total) and must have lost at least 70% of its original habitat. The concept was developed by Norman Myers in 1988 and later adopted by Conservation International. India harbours four of the 36 global hotspots: Himalaya, Indo-Burma, Western Ghats and Sri Lanka, and Sundaland (which includes the Nicobar Islands).

Endemic Species: Species that are native to a single defined geographic location and are found nowhere else on Earth. Endemism is a key criterion for identifying conservation priorities. India hosts a high number of endemic species, especially in the Western Ghats (e.g., Nilgiri tahr, lion‑tailed macaque) and the Eastern Himalayas (e.g., red panda). In Odisha, the Olive Ridley turtle (arribada nesting at Gahirmatha) and the Chilika dolphin are iconic endemic or near‑endemic populations.

Conservation (In‑situ): The preservation of species in their natural habitat. This includes National Parks, Wildlife Sanctuaries, Biosphere Reserves, Sacred Groves, and Community Reserves. The underlying principle is to protect the entire ecosystem so that species can continue to evolve naturally.

Conservation (Ex‑situ): The preservation of species outside their natural habitat. Examples are zoos, botanical gardens, gene banks, seed banks, and aquariums. Ex‑situ conservation serves as a safety net when in‑situ options are no longer viable.

Other Effective area‑based Conservation Measure (OECM): A geographically defined area other than a Protected Area (PA) that is governed and managed in ways that achieve positive and sustained long‑term outcomes for biodiversity. India’s first OECM recognition was granted for biodiversity management in community forests (OPSC 2024). OECMs complement the formal PA network.

CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora): An international agreement (signed 1973, effective 1975) that aims to ensure that international trade in specimens of wild animals and plants does not threaten their survival. It lists species in three Appendices (I, II, III) with varying levels of trade restrictions. India is a party to CITES and has conducted operations like Operation Save Kurma (targeting illegal trade in turtles/tortoises), which received a CITES Certificate of Commendation (OPSC 2019).

Project Tiger: India’s flagship species‑specific conservation programme, launched in 1973 from Corbett National Park. It established a network of Tiger Reserves under a core‑buffer strategy. The initial reserves (1973‑74) included Corbett, Similipal, Manas, Sunderbans, Ranthambore, Kanha, Bandipur, Palamau, and Melghat.

Crocodile Conservation Project: Initiated in 1975 (tested in OPSC 2021) with the support of the United Nations Development Programme (UNDP). It focused on three crocodilian species: Gharial, Mugger (Marsh Crocodile), and Saltwater Crocodile. The project involved captive breeding, restocking, and habitat protection.

Biosphere Reserve: A protected area designated under UNESCO’s Man and the Biosphere (MAB) Programme (launched 1971). Biosphere Reserves are not a legal category under Indian law; they are recognised sites that promote conservation and sustainable development through a three‑zone system: core area (strict protection), buffer zone (limited human activity), and transition zone (sustainable resource use). India has 18 Biosphere Reserves (as of 2025), of which 12 are part of the UNESCO World Network of Biosphere Reserves.

Mangrove Ecosystem: A coastal wetland forest found in tropical and subtropical intertidal zones. Mangroves protect coastlines, support fisheries, and store carbon. The International Day for the Conservation of the Mangrove Ecosystem is celebrated on 2 February (also World Wetlands Day; OPSC 2021 tested this date).

Endemic Species of Odisha: Odisha’s biodiversity includes several endemic or rare species. Notable are the Olive Ridley turtles (Gahirmatha, Rushikulya), the Chilika lake dolphin (Irrawaddy dolphin), the Bhitarkanika saltwater crocodiles, and the Similipal tiger (a distinct ecological population). The black buck (Antilope cervicapra) is an endangered antelope; India’s first conservation reserve for black buck was established in Allahabad, Uttar Pradesh (OPSC 2019).

Biodiversity Hotspots: Global and Indian

What Makes a Hotspot?

The hotspot concept, pioneered by Norman Myers, is a powerful conservation prioritisation tool. Out of the world’s 36 recognised hotspots, only about 2.5% of Earth’s land surface is covered, yet they contain more than 50% of all endemic plant species and 43% of endemic vertebrate species. The four Indian hotspots — Himalaya, Indo‑Burma, Western Ghats & Sri Lanka, and Sundaland — collectively host thousands of endemic species that survive in increasingly fragmented habitats.

Detailed Look at Indian Hotspots

Himalaya Hotspot: Extends across India, Nepal, Bhutan, and parts of Pakistan, China, and Myanmar. It includes the Eastern Himalayas (biodiversity rich) and the Western Himalayas. Endemic species include the Red Panda, Himalayan Monal, and numerous rhododendrons. Loss of original habitat is severe due to deforestation and climate change.

Indo‑Burma Hotspot: Covers parts of India (northeastern states), Myanmar, Thailand, Laos, Vietnam, Cambodia, and southern China. India’s northeast is especially rich. Species like the Hoolock Gibbon, Namdapha flying squirrel, and Mishmi takin are endemic. Deforestation for shifting agriculture and infrastructure projects threaten this region.

Western Ghats and Sri Lanka Hotspot: The Western Ghats (also known as Sahyadri) run parallel to India’s west coast. This region is a UNESCO World Heritage Site and one of the world’s ten “hottest hotspots.” Endemic fauna includes Nilgiri tahr, lion‑tailed macaque, Malabar giant squirrel, and Purple frog. Flora includes cinnamon, teak, and ebony. Over 60% of the original habitat has been lost.

Sundaland Hotspot: Covers the Nicobar Islands (India), Indonesia, Malaysia, Singapore, Brunei, and the Philippines. India’s Nicobar Islands host endemic species like the Nicobar megapode, Nicobar crab‑eating macaque, and Nicobar shrike. The 2004 tsunami caused significant habitat loss; subsequent development further pressures endemic species.

Why OPSC Asks About Hotspots

Although none of the seven PYQs directly asked to name the four Indian hotspots, the concept underpins most conservation‑related questions. For example, questions on endemic species (black buck, Olive Ridley) implicitly rely on understanding hotspots. Moreover, the OECM and Biosphere Reserve questions test the broader conservation framework that emerges from hotspot prioritisation. A thorough grasp of hotspots will help you reason through any new question.

Endemic Species: India and Odisha Focus

Defining Endemism

Endemism is not the same as being rare. A species can be rare but widely distributed; an endemic species is restricted to one area. Endemism is highest in isolated ecosystems — islands, mountain peaks, deep lakes. India’s high endemism is concentrated in the Western Ghats (about 2,000 endemic flowering plants, 100 endemic reptiles, 120 endemic amphibians). The Eastern Himalayas also boast high endemism due to altitudinal variation.

Important Endemic Species Tested or Likely to Be Tested

Odisha: A Special Case

Odisha’s biodiversity is shaped by its varied ecosystems: the Eastern Ghats (dry deciduous forests), coastal wetlands (Chilika, Bhitarkanika), and mangrove forests (Mahanadi delta). The Similipal Tiger Reserve is not only a Project Tiger site (1973) but also a Biosphere Reserve (1996) and a UNESCO World Network Biosphere Reserves member (2009). The state’s Olive Ridley turtle conservation effort is globally recognised. The KALIA scheme (Krushak Assistance for Livelihood and Income Augmentation) is a state‑level agricultural programme, but questions linking farmer livelihoods to biodiversity (e.g., community forests, OECM) could appear.

Memory Aid for Odisha Endemic Species: “CROWB”
C – Crocodile (Saltwater, Mugger)
R – Ridley (Olive Ridley turtle)
O – Orissa (old name) dolphin (Irrawaddy)
W – Wild elephant (Elephant Reserves)
B – Black buck (though not endemic to Odisha, but present in Ganjam district)
This helps recall Odisha’s flagship species.

Conservation Strategies: In‑situ and Ex‑situ

In‑situ Conservation: The Backbone

India’s protected area network comprises National Parks (106), Wildlife Sanctuaries (573), Community Reserves (220), Conservation Reserves (100+), and Tiger Reserves (54). The goal is to maintain viable populations of species in their natural habitats.

Key Point: Conservation Reserves and Community Reserves are categories added by the 2002 amendment to the Wildlife Protection Act (1972). They bridge the gap between formal PAs and community‑managed lands.

Ex‑situ Conservation: Safety Nets

Ex‑situ methods are critical for species that have lost their habitat or are critically endangered. India has 59 Central Zoos (under Central Zoo Authority), 107 Botanical Gardens (networked under BSI), and 10 Gene Banks (e.g., National Bureau of Plant Genetic Resources, New Delhi). The Crocodile Conservation Project (1975) is a classic example: it used captive breeding to restock wild populations, achieving remarkable success for the Gharial.

OECM – The New Paradigm

The Other Effective area‑based Conservation Measure (OECM) was formally recognised under the Convention on Biological Diversity’s Post‑2020 Global Biodiversity Framework. India’s first OECM recognition was awarded to community‑managed forests in the state of Uttarakhand (OPSC 2024). The recognition acknowledges that biodiversity outcomes can be achieved outside formal PAs, often through traditional practices. In Odisha, sacred groves (like Deogarh and Mayurbhanj) are potential OECM candidates.

Comparison Table: In‑situ vs Ex‑situ Conservation

Biosphere Reserves of India

Concept and Zones

Biosphere Reserves are not a legal category under the Wildlife Protection Act, 1972; they are designated by the Indian Government and recognised by UNESCO’s MAB Programme. They aim to integrate conservation with sustainable development. The three‑zone design is critical:

• Core Area: Legally protected (National Park or Sanctuary), no human activity.
• Buffer Zone: Surrounds the core; allows limited uses (research, education, tourism).
• Transition Zone: Outer area where human settlements and sustainable resource use are permitted.

List of India’s 18 Biosphere Reserves (as of 2025)

Memory Aid for First 10 Biosphere Reserves: “No Nanda Noks the Great Gulf of Sunda Man Sim Dib Deb”
This chain helps recall: Nilgiri, Nanda Devi, Nokrek, Great Nicobar, Gulf of Mannar, Sundarbans, Manas, Similipal, Dibru‑Saikhowa, Dehang Debang. (Use the first letters: N, N, N, G, G, S, M, S, D, D)

The PYQ on Biosphere Reserves (OPSC 2024)

The question asked which statements about Biosphere Reserves in India are NOT correct. The correct answer was “3 and 4 only”. Let us reconstruct the statements:

1. Biosphere Reserves are sites for in‑situ conservation. (True)
2. They have three zones: core, buffer, and transition. (True)
3. The first Biosphere Reserve in India was the Sundarbans. (False – the first was Nilgiri, established in 1986)
4. Biosphere Reserves are designated by UNESCO under the Man and Biosphere Programme. (Partially false – the Indian government designates them; UNESCO recognises them. The statement as worded likely claimed “designated by UNESCO”, which is incorrect; India designates its own Biosphere Reserves, and some are later included in the World Network.)

Thus, statements 3 and 4 are incorrect, aligning with the answer.

Tiger Reserves: The 1973 Cohort

Project Tiger – Genesis

Project Tiger was launched on 1 April 1973 from Corbett National Park (then in Uttar Pradesh, now Uttarakhand). The initial nine reserves were:

The PYQ (OPSC 2022) gave four pairs and asked which combination does not include the Tiger Reserves established in 1973. The correct answer was “Dholpur‑Karauli Tiger Reserve, Satkosia Tiger Reserve”. Both are later additions: Satkosia (Odisha) was declared in 2007; Dholpur‑Karauli (Rajasthan) was declared in 2023. The other three pairs all contained 1973 reserves.

Memory Aid for 1973 Tiger Reserves: “C S M S R K B P M”
Try: Corbett, Similipal, Manas, Sunderbans, Ranthambhore, Kanha, Bandipur, Palamau, Melghat.
A sentence: “Cute Squirrels Make Smart Robots Keep Bouncing Purple Mice.”

International Conventions and Days

CITES and Operation Save Kurma

CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora) is one of the most powerful global instruments for biodiversity conservation. India is a signatory (1976, effective), and the Wildlife Crime Control Bureau (WCCB) is the national authority. Operation Save Kurma (2017) was a targeted crackdown on illegal trade in turtles and tortoises (Kurma = turtle in Sanskrit). It involved multiple state‑wide raids and led to several arrests. India received a CITES Certificate of Commendation for this operation (OPSC 2019).

International Mangrove Day

The International Day for the Conservation of the Mangrove Ecosystem is observed on 2 February (the same date as World Wetlands Day). This was tested in OPSC 2021. The question offered options 23 July, 24 June, and 21 March; the correct answer is 2 February. The day was adopted by UNESCO in 2015 to raise awareness of mangrove ecosystems.

Other Important Dates

• World Wildlife Day: 3 March (CITES anniversary)
• International Day for Biological Diversity: 22 May
• World Environment Day: 5 June
• World Elephant Day: 12 August
• Wildlife Week in India: 2–8 October

Worked Examples & Applications

Below we walk through each of the seven PYQs. Use these examples to develop a systematic approach.

Example 1 — OPSC 2019

Question: India’s first-ever conservation reserve for black buck will come up in which city-state?

Choices students saw:

• Bhopal, Madhya Pradesh
• Udaipur, Rajasthan
• Allahabad, Uttar Pradesh
• Kochi, Kerala

Walkthrough:

1. What the question is testing: Knowledge of a specific conservation initiative — a Conservation Reserve (in‑situ category under Wildlife Protection Act) for the black buck, an antelope with cultural significance in India.
2. Why each wrong choice is wrong:
   • Bhopal: Black bucks are found in Madhya Pradesh (e.g., Kanha, Bandhavgarh), but a first-ever conservation reserve was not announced there.
   • Udaipur: Rajasthan has black buck populations (Tal Chhapar Sanctuary), but again no “first-ever conservation reserve” had been announced.
   • Kochi: Kerala has no significant black buck populations.
3. Why the correct choice is right: The Allahabad (now Prayagraj) district of Uttar Pradesh was chosen for the first-ever black buck conservation reserve, notified by the state government in 2018. The area holds a small population of black bucks in the trans‑Yamuna region.

Correct answer: Allahabad, Uttar Pradesh

Takeaway: Conservation reserves and community reserves are growing in importance; know the first‑of‑their‑kind examples.

Example 2 — OPSC 2021

Question: International Day for the Conservation of the Mangrove Ecosystem is celebrated on which day?

Choices students saw:

• 23 July
• 2 February
• 24 June
• 21 March

Walkthrough:

1. What the question is testing: Precise date of an international day proclaimed by UNESCO.
2. Why each wrong choice is wrong:
   • 23 July: No major biodiversity day falls on this date.
   • 24 June: Not an international day for any biodiversity convention.
   • 21 March: This is World Forestry Day, not mangrove‑specific.
3. Why the correct choice is right: UNESCO designated 2 February as International Day for the Conservation of the Mangrove Ecosystem simultaneously with World Wetlands Day. Both share the date to emphasise the link between wetlands and mangroves.

Correct answer: 2 February

Takeaway: Overlapping international days are common; memorise them as a group (e.g., 2 Feb – Wetlands & Mangroves; 22 May – Biodiversity; 5 June – Environment).

Example 3 — OPSC 2024

Question: India’s first OECM (Other Effective area-based Conservation Measure) recognition was awarded for which reason?

Choices students saw:

• Ex-situ conservation of orchids
• Biodiversity management in community forests
• Sacred groves with endemic fauna
• Coral reef mapping

Walkthrough:

1. What the question is testing: Understanding the concept of OECM and a specific recent recognition in India.
2. Why each wrong choice is wrong:
   • Ex‑situ conservation of orchids: Orchid conservation is important, but OECM recognition was not for ex‑situ.
   • Sacred groves with endemic fauna: Sacred groves are potential OECMs, but India’s first recognition was awarded for community forests, not sacred groves.
   • Coral reef mapping: Coral reefs are marine ecosystems; OECM recognition has been given for terrestrial community forests.
3. Why the correct choice is right: In 2024, the Uttarakhand Biodiversity Board received India’s first OECM recognition for community‑managed forests in the state. These forests have been sustainably used by local communities for generations, maintaining high biodiversity.

Correct answer: Biodiversity management in community forests

Takeaway: OECM is a post‑2020 CBD concept; stay updated on India’s implementation examples.

Example 4 — OPSC 2024

Question: Which of the following statements about Biosphere Reserves in India are NOT correct?

Choices students saw:

• 3 only
• 1 and 3 only
• 1, 2 and 4 only
• 3 and 4 only

Walkthrough:

1. What the question is testing: Depth of knowledge on Biosphere Reserves — their purpose, zoning, history, and designation authority.
2. Why each wrong choice is wrong:
   • “3 only” is incorrect because statement 4 is also false.
   • “1 and 3 only” is incorrect because statement 1 is true.
   • “1, 2 and 4 only” would mean statement 3 is correct (which it is not) and statement 4 is correct (which it is not).
3. Why the correct choice is right: The question’s correct answer is “3 and 4 only”. Statement 3 (first BR was Sundarbans) is false — Nilgiri was first. Statement 4 (BRs are designated by UNESCO) is false — India designates them; UNESCO recognises certain BRs into its World Network.

Correct answer: Statements 3 and 4 are not correct.

Takeaway: When faced with a “which are NOT correct” question, check each statement against known facts. Use elimination.

Example 5 — OPSC 2021

Question: Indian Crocodile Conservation Project was started in which year?

Choices students saw:

• 1973
• 1975
• 1992
• 1999

Walkthrough:

1. What the question is testing: Recall of a specific project launch year.
2. Why each wrong choice is wrong:
   • 1973: This is the year Project Tiger was launched; often confused because both are flagship species projects.
   • 1992: This is the year the Earth Summit (Rio) was held, not crocodile project.
   • 1999: No major conservation project started that year.
3. Why the correct choice is right: The Crocodile Conservation Project was launched in 1975 with UNDP support. It focused on three species: Gharial, Mugger, and Saltwater Crocodile.

Correct answer: 1975

Takeaway: Link project years with events: Tiger (1973), Crocodile (1975), Elephant (1992 – not tested but useful), Rhino (2005).

Example 6 — OPSC 2019

Question: India awarded Certificate of Commendation by CITES for its effort to combat illegal wildlife trade during 2017 for which of the following operations?

Choices students saw:

• Operation Thunderbird
• Operation Save Kurma
• Operation Save a Life
• Operation Save Tigers

Walkthrough:

1. What the question is testing: Awareness of India’s specific CITES‑recognised operation.
2. Why each wrong choice is wrong:
   • Operation Thunderbird: A global INTERPOL operation targeting illegal fishing and wildlife trade, but not India‑specific CITES commendation.
   • Operation Save a Life: Not a real operation in this context.
   • Operation Save Tigers: A generic term, but CITES commended an operation specifically for turtles and tortoises.
3. Why the correct choice is right: Operation Save Kurma (Kurma = turtle) was conducted by the Wildlife Crime Control Bureau (WCCB) in 2017. It led to many arrests and seizures, and India received a CITES Certificate of Commendation for this.

Correct answer: Operation Save Kurma

Takeaway: Memorise key wildlife enforcement operations: Save Kurma (turtles), Les Knowles (ivory), Operation Wildnet (general), etc.

Example 7 — OPSC 2022

Question: Which one of the following combinations does not include the Tiger Reserves established in the year 1973?

Choices students saw:

• Corbett Tiger Reserve, Similipal Tiger Reserve
• Manas Tiger Reserve, Sunderbans Tiger Reserve
• Ranthambore Tiger Reserve, Kanha Tiger Reserve
• Dholpur-Karauli Tiger Reserve, Satkosia Tiger Reserve

Walkthrough:

1. What the question is testing: Knowledge of the initial 1973 Tiger Reserves under Project Tiger.
2. Why each wrong choice is wrong (i.e., why each of the first three pairs are correct):
   • Corbett & Similipal — both 1973 reserves.
   • Manas & Sunderbans — both 1973.
   • Ranthambore & Kanha — both 1973.
3. Why the correct choice is right: Dholpur‑Karauli (Rajasthan) was declared in 2023, and Satkosia (Odisha) in 2007. Neither existed in 1973.

Correct answer: Dholpur‑Karauli Tiger Reserve, Satkosia Tiger Reserve

Takeaway: Master the 1973 cohort; many newer reserves are often mixed in as distractors.

PYQ Trends & Patterns

The seven PYQs span four years (2019, 2021, 2022, 2024). We can extract several patterns:

• Factual vs Analytical split: The majority (5 out of 7) are purely factual — dates (mangrove day, crocodile project year), locations (black buck reserve), operation names (Save Kurma), and reserve lists (1973 tiger reserves). Two questions are analytical in nature — the Biosphere Reserve statements (need to evaluate truth of multiple statements) and the OECM recognition (requires conceptual understanding of what OECM means). Expect OPSC to balance both types.
• Matching / Pairing questions: The 2022 Tiger Reserve question uses a “which combination does NOT include” format, which is essentially a matching task. This is a common OPSC trick: give pairs or groups and ask for the odd one out.
• State‑specific focus: Odisha appears directly in the Tiger Reserve 1973 question (Similipal) and indirectly in the Crocodile project (Bhitarkanika). Other states (Uttar Pradesh, Uttarakhand) also feature. Be ready for questions that blend biodiversity with state geography.
• Recent events: OECM (2024) is a very current concept. Examiners love to test recent developments. Stay updated on conservation news from the last two years.
• Distractor design: Wrong options are often plausible because they are real but mismatched (e.g., 1973 for Crocodile project; 23 July for mangrove day). Distractors frequently involve dates/names from other biodiversity topics (e.g., Project Tiger date vs Crocodile project date).

What Else Could Be Asked

Based on the above patterns and the official syllabus points (which include national schemes, international treaties, and Odisha state schemes), here are concrete forecasts:

Common Mistakes & Traps

• Confusing Project Tiger (1973) with Crocodile Project (1975). Both are flagship national projects launched within two years; the decade (1970s) is a common source of mix‑up. Always anchor Tiger to 1973 (Corbett) and Crocodile to 1975 (UNDP support).
• Assuming the first Biosphere Reserve in India is Sundarbans. Because Sundarbans is famous, many students guess it. Nilgiri (1986) is the correct first. Similarly, the first UNESCO‑recognised BR in India was Nilgiri (2000), not Sundarbans (2001).
• Mistaking “designated by UNESCO” for Biosphere Reserves. India designates its own BRs; UNESCO only includes some in its World Network. The statement “Designated by UNESCO” is false.
• Mixing up International Mangrove Day (2 Feb) with World Mangrove Day (26 July). There is no such “World Mangrove Day” — only UNESCO’s 2 Feb. 26 July is celebrated in some countries but is not the international day.
• Forgetting that OECM stands for “Other Effective area‑based Conservation Measure” and thinking it means “Other Ecological Conservation Measure” or similar.
• Assuming all tiger reserves were established in 1973. Only nine were; many were added later. Always check the year, especially for reserves in Odisha (Similipal: 1973; Satkosia: 2007).
• Confusing “Conservation Reserve” with “Community Reserve”. Conservation Reserves are government‑owned lands adjacent to PAs; Community Reserves are on private/community lands. The black‑buck reserve in Allahabad is a Conservation Reserve.
• Thinking “Save Kurma” is about saving turtles in general without connecting it to the CITES commendation. The commendation was specific to the operation, not to the species in general.

Memory Aids & Mnemonics

1. Mnemonic for 1973 Tiger Reserves: “C S M S R K B P M” → “Cute Squirrels Make Smart Robots Keep Bouncing Purple Mice”

• Corbett (Uttarakhand)
• Similipal (Odisha)
• Manas (Assam)
• Sunderbans (West Bengal)
• Ranthambore (Rajasthan)
• Kanha (Madhya Pradesh)
• Bandipur (Karnataka)
• Palamau (Jharkhand)
• Melghat (Maharashtra)

Use the first letters to recall all nine. Practice by writing the chain on a blank page.

2. Mnemonic for the First 10 Biosphere Reserves of India: “No Nanda Noks the Great Gulf of Sunda Man Sim Dib Deb”

• No = Nilgiri (1986)
• Nanda = Nanda Devi (1988)
• Noks = Nokrek (1988)
• Great = Great Nicobar (1989)
• Gulf = Gulf of Mannar (1989)
• Sunda = Sundarbans (1989)
• Man = Manas (1989)
• Sim = Similipal (1996)
• Dib = Dibru‑Saikhowa (1997)
• Deb = Dehang Debang (1998)

The mnemonic forms a silly sentence that is easy to recall. For the remaining eight (Pachmarhi, Khangchendzonga, etc.), group them by decade (2000s).

3. Rhyme for International Days:

“February two, both wetlands and mangroves,
March three, CITES wildlife loves.
May twenty‑two, biodiversity day,
June five, environment is here to stay.”

This rhyme covers:

• 2 Feb – World Wetlands Day & Mangrove Day
• 3 March – World Wildlife Day (CITES anniversary)
• 22 May – International Day for Biological Diversity
• 5 June – World Environment Day

Quick Revision

Introduction

• Biodiversity = variety of life at genetic, species, ecosystem levels.
• OPSC asks fact‑based and analytical questions.
• Seven PYQs span dates, locations, operations, and conceptual understanding.

Core Concepts & Foundations

• Hotspot = ≥1,500 endemic plant species + ≥70% habitat loss. India: 4 of 36.
• Endemic species = found only in one area. Odisha key species: Olive Ridley, Irrawaddy dolphin, saltwater crocodile.
• In‑situ conservation = Natural habitat (NP, WS, BR, CR, OECM).
• Ex‑situ conservation = Zoos, gene banks, seed banks.
• CITES – regulates wildlife trade; Appendices I, II, III.
• Project Tiger (1973) – initial 9 reserves.
• Crocodile Project (1975) – Gharial, Mugger, Saltwater.
• OECM – first recognition for community forests in Uttarakhand.
• Biosphere Reserve – 18 in India; 12 UNESCO recognised.

Biodiversity Hotspots (Deep Dive)

• Himalaya, Indo‑Burma, Western Ghats & Sri Lanka, Sundaland.
• Each has unique endemic species; hotspots prioritise conservation.

Endemic Species (Deep Dive)

• Black buck – first conservation reserve in Allahabad, UP (PYQ 2019).
• Olive Ridley – Gahirmatha, Odisha; Vulnerable.
• Lion‑tailed macaque – Western Ghats; Endangered.
• Gharial – Critically Endangered; part of Project.

Conservation Strategies (Deep Dive)

• In‑situ: National Parks (106), Wildlife Sanctuaries (573), Conservation Reserves, Community Reserves.
• Ex‑situ: Zoos, botanical gardens, gene banks.
• OECM: New concept; first Indian example in Uttarakhand.

Biosphere Reserves (Deep Dive)

• Three zones: core, buffer, transition.
• First BR in India: Nilgiri (1986); NOT Sundarbans.
• Designated by Indian govt, not UNESCO.

Tiger Reserves (Deep Dive)

• 1973 cohort: 9 reserves (mnemonic: C S M S R K B P M).
• Dholpur‑Karauli & Satkosia are NOT from 1973 (PYQ 2022).

International Conventions & Days

• CITES – Operation Save Kurma (2017) won Certificate of Commendation.
• International Mangrove Day / World Wetlands Day – 2 February.
• Key dates: 3 Mar (Wildlife), 22 May (Biodiversity), 5 Jun (Environment).

Worked Examples

• 7 PYQs walked through: extract the fact, analyse distractors, note takeaway.
• Key technique: eliminate options that contradict known facts.

PYQ Trends & Patterns

• Factual majority (5/7); analytical questions on statements/concepts.
• Odisha‑specific and recent event focus.
• Distractors often from adjacent topics (dates, names).

What Else Could Be Asked

• New Tiger Reserve pairs, species under Crocodile Project, state‑wise BR count, cross‑linking of international days, OECM state name, sacred groves.

Common Mistakes & Traps

• Confusing Tiger vs Crocodile project years.
• Sundarbans vs Nilgiri as first BR.
• “Designated by UNESCO” for BRs.
• Mangrove Day date confusion.
• Mixing conservation reserve vs community reserve.

Memory Aids & Mnemonics

1. C S M S R K B P M for 1973 Tiger Reserves.
2. No Nanda Noks the Great Gulf of Sunda Man Sim Dib Deb for first 10 Biosphere Reserves.
3. Rhyme for international days.