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Subject: Conservation & Mitigation

1. Conservation Progs.
2. Worldwide initiatives
3. Mitigation Strategies
4. Conventions and Protocols

  • Coral Loss in Lakshadweep

    Why in the News?

    A 24-year-long study conducted by the Nature Conservation Foundation reveals that coral cover in Lakshadweep has declined by 50% since 1998.

    Coral Decline in Lakshadweep: Key Highlights

    • Study Duration: Based on a 24-year study (1998–2022).
    • Findings: 50% decline in live coral cover—from 37.2% to 19.6%.
    • Main Cause: Repeated marine heatwaves linked to climate change.
    • Study Locations: Monitored across Agatti, Kadmat, and Kavaratti atolls.
    • Response Clusters: Six coral groups identified based on:
      • Depth and wave exposure
      • Heat resistance and recovery patterns
    • Recovery Timeline: Requires at least 6 years without bleaching for healthy regeneration.

    Back2Basics: Corals and Coral Bleaching:

    • About: Corals are colonies of tiny animals called polyps, which build calcium carbonate skeletons.
    • Symbiotic Algae: Host zooxanthellae, microscopic algae that provide nutrients via photosynthesis.
    • Coral Types:
      • Hard Corals: Form reef structures (e.g., brain coral, staghorn coral).
      • Soft Corals: Flexible, grow on reef surfaces but do not build reefs.
    • Habitat Requirements:
      • Water Quality: Must be clean and low in sediment.
      • Temperature Range: Prefer 20–21°C.
      • Depth: Typically found in waters less than 90 metres deep.
      • Salinity: Optimal range is 27–30 parts per thousand (ppt).
      • Ocean Currents: Require nutrient-rich water flow.
    • Coral Bleaching:
      • Cause: Triggered by heat stress, pollution, or acidification, which drive algae out.
      • Effect: Coral turns white due to loss of algae; Loses its main food source. Dies if stress persists for long periods.
    [UPSC 2022] “Biorock Technology” is talked about in which one of the following situations?

    Options: (a) Restoration of damaged coral reefs * (b) Development of building materials using plant residues (c) Identification of areas for exploration/extraction of shale gas  (d) Providing salt licks for wild animals in forests

     

  • Towards Resilient and Prosperous Cities in India: World Bank Report (2024)

    Why in the News?

    The World Bank’s report, “Towards Resilient and Prosperous Cities in India”, warns that climate risks like extreme heat and floods threaten India’s cities, despite their role as economic growth engines.

    About the ‘Towards Resilient and Prosperous Cities in India’ Report

    • Prepared By: World Bank in collaboration with the Ministry of Housing and Urban Affairs
    • Focus: Evaluates Indian cities’ exposure to climate risks like heatwaves and urban flooding
    • Scope: Covers 24 cities with deeper analysis of Chennai, Indore, New Delhi, Lucknow, Surat, and Thiruvananthapuram
    • Support: Backed by Global Facility for Disaster Reduction and Recovery (GFDRR)

    Key Highlights:

    • Urban Growth:
      • 70% of new jobs to emerge in urban areas by 2030
      • Urban population to nearly double to 951 million by 2050
      • Estimated housing demand: 144 million new homes by 2070
    • Climate Vulnerabilities:
      • Urban heat: City temperatures rising by 3–4°C due to the heat island effect
      • Flood risk: Rapid construction limiting natural drainage and stormwater absorption
    • Investment Needs: $2.4 trillion required by 2050 for low-carbon, climate-resilient infrastructure
    • Recommendations:
      • Promote cool roofs, urban green spaces, and early warning systems
      • Invest in energy-efficient housing, flood-resilient transport, and waste systems
      • Strengthen urban financial systems and incentivize private participation

    Back2Basics: World Bank

    • Overview: A global development organisation supporting economic progress in developing nations
    • Founded: 1944 at the Bretton Woods Conference
    • Headquarters: Washington, D.C., United States
    • Members: 189 countries
    • India and the WB:
      • India is a founding member of the IBRD and currently participates in four out of the five World Bank Group entities.
      • India’s first World Bank loan, in 1948, was for railway rehabilitation.
    • Constituent Institutions:
      • IBRD – International Bank for Reconstruction and Development
      • IDA – International Development Association
      • IFC – International Finance Corporation
      • MIGA – Multilateral Investment Guarantee Agency
      • ICSID – International Centre for Settlement of Investment Disputes
    • Key Reports:
      • World Development Report
      • Global Economic Prospects
      • Ease of Doing Business Index (now replaced)
      • Business Ready (B-READY)

     

    [UPSC 2025] The World Bank warned that India could become one of the first places where wet-bulb temperatures routinely exceed 35°C. Which of the following statements best reflect(s) the implication of the above-said report?

    I. Peninsular India will most likely suffer from flooding, tropical cyclones and droughts. II. The survival of animals including humans will be affected as shedding of their body heat through perspiration becomes difficult.

    Select the correct answer using the code given below.

    Options: (a) I only (b) II only* (c) Both I and II (d) Neither I nor II

     

  • Rhino DNA Index System (RhODIS)

    Why in the News?

    The Assam Forest Department is conducting DNA profiling of 2,500 rhino horns using the Rhino DNA Index System (RhODIS) to aid wildlife forensics and curb illegal trade.

    What is Rhino DNA Index System (RhODIS)?

    • Overview: It is a wildlife forensic tool designed to combat rhino poaching through DNA profiling.
    • Development: It was originally developed by South Africa and later adapted for use in India.
    • Working: The system helps build a genetic database of individual rhinos by collecting DNA from horns, tissues, dung, or blood samples.
    • Utility: Each rhino has a unique DNA profile, making it possible to match confiscated horns with individual animals or poaching locations.
    • Implementing Agency: In India, the Wildlife Institute of India (WII) is responsible for RhODIS genetic analysis under the RhODIS India program.
    • Applications of RhODIS: The system plays a vital role in linking seized rhino horns to poaching incidents, providing admissible forensic evidence in court cases, tracking illegal wildlife trade routes and criminal networks, and monitoring genetic diversity and population health over time.

    About One-Horned Rhinoceros:

    • Overview: The Greater One-Horned Rhinoceros (Rhinoceros unicornis) is a herbivorous megafauna species native to the Indian subcontinent.
    • Distinctive Features: It is also called the Indian rhinoceros and is characterized by its single black horn and thick, armor-like skin.
    • Conservation Status: It is listed as Vulnerable on the IUCN Red List, in Appendix I of CITES, and under Schedule I of the Wildlife Protection Act, 1972 (India).
    • Major Habitats in India: Its primary habitats include Kaziranga, Pobitora, Manas, and Orang National Parks in Assam; Jaldapara and Gorumara National Parks in West Bengal; and the Dudhwa Tiger Reserve in Uttar Pradesh.
    • Population Growth: Its has increased from around 1,500 in the 1980s to over 4,000 in 2024, with Assam alone holding 80% of the global population. Kaziranga National Park houses the largest population, with 2,613 rhinos as per 2022 data.
    • Primary Threats: Major threats include poaching for horns driven by illegal wildlife trade and false beliefs about medicinal value, as well as habitat degradation due to floods, encroachment, and climate change.
    • Indian Rhino Vision 2020 (Project Rhino):  It was launched in 2005, aimed to spread the rhino population across seven protected areas.
    [UPSC 2019] Consider the following statements:

    1. Asiatic lion is naturally found In India only.

    2. Double-humped camel is naturally found in India only.

    3. One-horned rhinoceros is naturally found in India only.

    Which of the statements given above is / are correct?

    Options: (a) 1 only*  (b) 2 only (c) 1 and 3 only (d) 1, 2 and 3

     

  • Smoke and Sulphur: On sulphur dioxide emissions, public health

    Why in the News?

    Recently the Environment Ministry of India has recently exempted most coal-fired power plants from installing Flue Gas Desulphurisation (FGD) systems, reversing its 2015 mandate. This move weakens efforts to control sulphur dioxide (SO₂) emissions, a harmful air pollutant.

    What is Flue Gas Desulphurisation (FGD) system? 

    Flue Gas Desulphurisation (FGD) systems are air pollution control technologies used in thermal power plants to remove sulphur dioxide (SO₂) from flue gases (the exhaust emitted when coal or oil is burned).

    Why has FGD installation been exempted for most coal plants?

    • Low Sulphur Content in Indian Coal: Indian coal contains naturally low sulphur, reducing the urgency to control SO₂ emissions. Eg: The expert committee stated that SO₂ levels near plants using Indian coal were already below permissible limits.
    • High Installation and Operational Costs: Installing FGD systems is capital-intensive and can increase electricity tariffs. Eg: Many private power producers cited cost constraints as a barrier to following the 2015 FGD mandate.
    • Limited Vendor Capacity in India: There is a shortage of FGD equipment suppliers, causing delays in implementation. Eg: From 2015–2024, only 8% of 600 units installed FGDs, primarily by NTPC (a public sector company).
    • Impact of COVID-19 Pandemic: The pandemic caused supply chain disruptions and delayed project execution timelines. Eg: The Environment Ministry cited COVID-related delays for missing 2024 FGD deadlines.
    • Scientific Reassessment of SO₂ Effects: New studies suggest sulphates formed from SO₂ may have a climate-cooling effect, weakening the urgency of emission controls. Eg: The Power Ministry argued that reducing sulphates could actually worsen global warming.

    How does SO₂ affect health and air quality?

    • Respiratory Health Impacts: Sulphur dioxide (SO₂) irritates the respiratory tract, causing issues such as asthma, bronchitis, and shortness of breath, especially among vulnerable populations like children and the elderly. In Delhi, spikes in SO₂ levels have been linked to increased hospital visits for respiratory ailments during winter months.
    • Formation of Particulate Matter (PM2.5): SO₂ reacts in the atmosphere to form sulphate aerosols, a major component of PM2.5, which penetrates deep into lungs and contributes to air pollution. Industrial belts like Singrauli in Madhya Pradesh record high levels of particulate pollution, partly due to emissions from coal-fired plants.
    • Reduced Visibility and Environmental Damage: SO₂ contributes to acid rain and haze, damaging crops, soil, and water sources, and reducing visibility. Areas near thermal power plants, such as in Chhattisgarh, have reported acidic soil degradation, affecting agriculture.

    What does selective FGD enforcement indicate about regulation?

    • Location-Based Policy Inconsistency: The decision to mandate FGD installation only near NCR and urban hotspots suggests that environmental regulations are being applied selectively, not based on uniform scientific standards, but geographical and political considerations.
    • Weak Enforcement and Shifting Priorities: Exempting most coal plants despite earlier commitments reflects regulatory dilution, raising concerns about policy backtracking and the government’s willingness to compromise on environmental health in favor of industrial or economic concerns.
    • Undermining Scientific Credibility and Public Trust: Ignoring the original mandate without robust public debate weakens trust in evidence-based regulation, indicating that scientific advisories are not consistently followed in policy implementation.

    Why is public debate vital before policy shifts on pollution?

    • Ensures Transparency and Accountability: Open public debate creates transparency, compelling policymakers to justify decisions and remain accountable to citizens.
    • Strengthens Scientific Rigor: Debate enables scientific scrutiny of environmental claims, ensuring that policy changes are based on credible evidenceand expert consultation.
    • Safeguards Public Health and Democratic Rights: Inclusive discussions protect public health and uphold democratic values by allowing citizens to voice concerns over pollution-related policies.

    Why is public debate vital before policy shifts on pollution?

    • Perform, Achieve and Trade (PAT) Scheme: Implemented by the Bureau of Energy Efficiency (BEE), this market-based mechanism promotes energy efficiency in industries, indirectly reducing emissions.
    • National Clean Air Programme (NCAP): Launched in 2019, it aims for a 20–30% reduction in PM2.5 and PM10 levels by 2024 (now extended), and addresses urban air pollution through sector-specific mitigation plans.
    • Retrofitting of Plants: Plants identified in pollution hotspots, those near NCR or million-plus cities, are required to install FGD by 2028, as per latest Environment Ministry directive.
    • Promotion of Renewable Energy and Ujjwala Yojana: Transition towards cleaner energy sources (solar, wind) and LPG distribution under Ujjwala Yojana has reduced reliance on coal and biomass, indirectly curbing SO₂ emissions.

    Way forward: 

    • Revise FGD Policy Through Transparent Public Consultation: Any change in environmental regulation, especially exemptions, must involve scientific review, public debate, and stakeholder consultations to ensure credibility and protect public health.
    • Strengthen Pollution Monitoring and Accountability: Enhance the real-time SO₂ monitoring network, enforce uniform emission standards, and link compliance with financial or operational incentives to promote cleaner technologies across all power plants.

    Mains PYQ:

    [UPSC 2024] Industrial pollution of river water is a significant environmental issue in India. Discuss the various mitigation measures to deal with this problem and also the government’s initiatives in this regard.

    Linkage: The article talks about the Environment Ministry’s decision to exempt most coal-fired plants from mandatory Flue Gas Desulphurisation (FGD) systems, which is a significant government initiative related to an environmental issue (sulphur dioxide emissions) and its mitigation. This is a direct and comprehensive question about environmental issues and the government’s initiatives and mitigation measures.

  • Specie in news: Lion-Tailed Macaque

    Why in the News?

    The National Board for Wildlife (NBWL) has granted approval for diverting 142.76 hectares of forest land in Sharavathi Valley Lion-Tailed Macaque Wildlife Sanctuary, Karnataka.

    https://www.downtoearth.org.in/environment/in-principle-nod-to-sharavathi-valley-hydel-project-in-endangered-lion-tailed-macaque-sanctuary 

    About Lion-Tailed Macaque:

    • Scientific Classification: The Lion-Tailed Macaque (Macaca silenus), also known as the Wanderoo or Bearded Monkey, is an primate species endemic to the Western Ghats of India.
    • Distribution: It is found primarily in the states of Karnataka, Kerala, and Tamil Nadu.
    • Physical Characteristics: Recognized by a silver-white mane surrounding a black face and a lion-like tuft at the end of its tail, the body is covered in glossy black fur, and both sexes look similar.
    • Habitat and Behaviour
      • Preferences: The species inhabits tropical evergreen rainforests, and is also found in monsoon forests and shola-grassland ecosystems.
      • Habitat: It is arboreal (tree-dwelling) and diurnal (active during the day).
      • Elevation Range: Typically lives at altitudes between 600 and 1,800 metres above sea level.
      • Human Avoidance: Known for being shy, it tends to avoid human contact, staying high in the forest canopy.
      • Social Structure: Lives in social groups of 8 to 20 individuals, usually led by a dominant male.
    • Behaviour:
      • Dietary Habits: Primarily frugivorous, eating fruits, but also consumes leaves, stems, flowers, buds, fungi, and occasionally insects and small animals.
      • Communication System: Possesses a rich vocal communication system with over 17 distinct vocalizations.
      • Territorial Behavior: Males use loud calls to mark territory and warn intruders.
    • Conservation Status:
      • IUCN Status: Classified as Endangered on the IUCN Red List.
      • Legal Protection: Appendix I of CITES; Schedule I of the Indian Wildlife (Protection) Act, 1972.
    • Population and Conservation Efforts:
      • Population: It is estimated at around only 2,500 individuals.
      • Key Protected Area: The Sharavathi Valley Lion-Tailed Macaque Wildlife Sanctuary in Karnataka hosts the largest known population in any protected area, with around 700 individuals.
    • Ecological Importance:
      • Serves as an indicator species for rainforest health.
      • Plays a vital role in seed dispersal, contributing to forest regeneration.
    [UPSC 2023] Consider the following fauna:

    1. Lion-tailed Macaque 2. Malabar Civet 3. Sambar Deer

    How many of the above are generally nocturnal or most active after sunset?

    Options: (a) Only one (b) Only two* (c) All three (d) None

     

  • Revising Guidelines to declare Eco-Sensitive Zones (ESZ)

    Why in the News?

    The Standing Committee of the National Board for Wildlife (SC-NBWL) has decided to review and revise the 2011 guidelines on the declaration of Eco-Sensitive Zones (ESZs) around wildlife sanctuaries and national parks.

    What are Eco-Sensitive Zones (ESZs)?

    • Overview: ESZs, also called Ecologically Fragile Areas (EFAs), are areas notified by the Ministry of Environment, Forest and Climate Change (MoEFCC) around Protected Areas (PAs) like national parks and wildlife sanctuaries.
    • Purpose:
      • Act as “shock absorbers” to protect areas by regulating potentially harmful activities.
      • Serve as transition zones from highly protected to less protected ecosystems.
      • Help conserve biodiversity, maintain landscape connectivity, and prevent fragmentation of habitats.
    • Legal Basis:
      • Environment (Protection) Act, 1986, particularly Section 3(2)(v).
      • Rule 5(1) of Environment (Protection) Rules, 1986.
    • Wildlife Conservation Strategy, 2002: Recommended declaring 10 km radius around PAs as default ESZ.
    • Demarcation Process:
      • ESZ boundaries vary in width based on ecological sensitivity and ground realities.
      • Factors considered: species presence, migration routes, landscape linkage, human settlements, etc.
    • Activity Zonation:
      • Prohibited: Commercial mining, polluting industries, major hydro projects, wood logging.
      • Regulated: Tree felling, large-scale agriculture change, road widening, tourism infrastructure.
      • Permitted: Rainwater harvesting, organic farming, green energy use.
    • Present Status:
      • 347 final notifications issued.
      • Where no ESZ is notified, a default 10-km ESZ is applicable (SC 2022 ruling).

    2011 Guidelines on ESZs:

    • Issued by MoEFCC to standardize and guide the process of ESZ declaration.
    • Key Features:
      • Emphasized flexibility and site-specific demarcation.
      • Classified activities into permitted, regulated, prohibited.
      • Directed preparation of a Zonal Master Plan (ZMP) within 2 years of ESZ notification.
      • Called for community involvement, scientific input, and buffer management.

    Recent Context:

    • Reasons Behind: Revision One-size-fits-all (10-km blanket rule) is not effective:
      • Urban examples: Sanjay Gandhi National Park (Mumbai), Asola Bhatti Sanctuary (Delhi).
      • In Himachal Pradesh, ~65% area already under forest cover.
      • Kerala: Fear of new sanctuary leading to more restrictions.
    • Over-generalized: Existing guidelines unsuitable for marine sanctuaries, need ecosystem-specific norms.
    [UPSC 2014] With reference to ‘Eco-Sensitive Zones’, which of the following statements is/are correct?

    1. Eco-Sensitive Zones are the areas that are declared under the Wildlife (Protection) Act, 1972.

    2. The purpose of the declaration of Eco-Sensitive Zones is to prohibit all kinds of human activities in those zones except agriculture.

    Select the correct answer using the code given below.

    Options: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 *

     

  • UNEP Frontiers 2025 Report on Legacy Pollutants

    Why in the News?

    The United Nations Environment Programme (UNEP), in its latest Frontiers 2025 report titled The Weight of Time, has warned that increased river and coastal flooding caused by climate change could unearth dangerous legacy pollutants from water bodies.

    About Legacy Pollutants:

    • Definition: Legacy pollutants refer to toxic substances like heavy metals and persistent organic pollutants (POPs) that continue to remain in the environment even decades after their use has been banned or restricted.
    • Examples:
      • Heavy Metals: Lead, Cadmium, Mercury, Arsenic.
      • Persistent Organic Pollutants (POPs):
        • Pesticides: DDT (Dichlorodiphenyltrichloroethane), Aldrin, Endrin, Chlordane.
        • Industrial Chemicals: PCBs (Polychlorinated Biphenyls), Dioxins, Furans.
        • By-products: Produced from incineration, metal smelting, and waste burning.
    • Persistence: These substances are highly resistant to environmental degradation and accumulate in riverbeds, lakes, estuaries, and other sediment-rich ecosystems.
    • Health Hazards: Even at low exposure levels, legacy pollutants can cause: Neurotoxicity (nervous system damage), Immunotoxicity (immune disruption), Hepatotoxicity (liver damage), Reproductive toxicity (infertility, birth defects), Carcinogenicity (various cancers), Endocrine disruption etc.
    • Sources:
      • Past industrial practices, use of banned agricultural chemicals, and obsolete pesticide stockpiles.
      • Improperly managed chemical landfills, which still hold an estimated 4.8–7 million tonnes of POP waste globally.

    UNEP Frontiers 2025 Report on Legacy Pollutants

    Key Highlights of Frontiers 2025: The Weight of Time (UNEP):

    • Retreat of Toxins: Climate change-induced flooding can unearth and redistribute toxic legacy pollutants from contaminated sediments into the environment and food chain.
    • How? Floodwaters re-suspend heavy metals and POPs trapped in sediment.
    • Case Studies Cited:
      • Hurricane Harvey (Texas, 2017): Released mercury and carcinogenic chemicals from flood-induced sediment dispersal into Galveston Bay.
      • Niger Delta Floods (Nigeria, 2012): Mobilised Polycyclic Aromatic Hydrocarbons (PAHs) from oil-contaminated sediments.
      • Pakistan Floods (2010 & 2022): Washed away obsolete pesticide stockpiles, spreading DDT and other POPs into floodwaters and soils.
    • India-Specific Findings:
      • Sediments of Ganga, Hindon, and Vaigai Rivers show dangerously high levels of Cadmium.
      • Cadmium is a known carcinogen and endocrine disruptor, with potential to cause kidney, bone, and reproductive harm.
      • Ayad and Vaigai Rivers also showed up deadly levels of Lead concentration.
    [UPSC 2016] Which of the following can be found as pollutants in the drinking water in some parts of India?

    1. Arsenic 2. Sorbitol 3. Fluoride 4. Formaldehyde 5. Uranium

    Options: (a) 1 and 3 only (b) 2, 4 and 5 only (c) 1, 3 and 5 only* (d) 1, 2, 3, 4 and 5

     

  • Carbon Border Adjustment Mechanisms (CBAM)

    Why in the News?

    BRICS group has condemned and rejected the European Union’s Carbon Border Adjustment Mechanism (CBAM) and other similar climate-linked trade measures.

    What Is the Carbon Border Adjustment Mechanism (CBAM)?

    • Overview: It is a climate-related import duty imposed by the European Union on goods whose production involves higher carbon emissions than what is permitted in the EU.
    • Policy Framework: CBAM is part of the EU’s “Fit for 55” climate package, aimed at reducing greenhouse gas emissions by at least 55% by 2030 compared to 1990 levels.
    • Scope of Coverage: The policy requires importers to declare the volume and embedded carbon emissions of certain goods, such as steel, aluminium, cement, fertiliser, hydrogen, and electricity.
    • Compliance Mechanism: To offset these emissions, EU importers must surrender CBAM certificates, priced based on the EU Emissions Trading System (ETS).
    • Carbon Price Adjustment: If a non-EU producer has already paid a carbon price in their country, that amount can be deducted from the CBAM charge.
    • Implementation Timeline: The transitional phase of CBAM is underway from 2023 to 2025, and the definitive regime begins on January 1, 2026.

    Issues with CBAM:

    • Trade Discrimination Concerns: Developing countries, including India and China, argue that CBAM imposes unilateral, punitive, and discriminatory trade restrictions under the guise of environmental protection.
    • Violation of Climate Agreements: It is viewed as a violation of Paris Agreement, which upholds the principle of common but differentiated responsibilities.
    • Neglect of Historical Emissions: Countries in the Global South contend that climate-related trade tools like CBAM ignore historical emissions and disproportionately impact countries still reliant on carbon-intensive development.

    Implications of CBAM for India:

    • Impact on Exports: Indian exports, particularly in iron, steel, aluminium, and cement, will face additional scrutiny and carbon charges under CBAM, reducing their competitiveness.
    • Carbon Taxation Timeline: From January 1, 2026, carbon taxes will be levied on each shipment to the EU in specific sectors, ranging from 19.8% to 52.7% in potential carbon levies.
    • High Carbon Intensity Risk: India’s high carbon intensity, primarily due to its 75% dependence on coal, makes its products more vulnerable to CBAM tariffs.
    [UPSC 2023] Consider the following statements:

    Statement-I: Carbon markets are likely to be one of the most widespread tools in the fight against climate change.

    Statement-II: Carbon markets transfer resources from the private sector to the State.

    Which one of the following is correct in respect of the above statements?

    Options: (a) Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I (b) Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I ** (c) Statement-I is correct but Statement-II is incorrect (d) Statement-I is incorrect but Statement-II is correct

     

  • Rare Great Hornbill sighted in Kerala

    Why in the News?

    The Great Hornbill (Malamuzhakki Vezhambal)—Kerala’s State bird and a symbol of forest biodiversity—was spotted far outside its usual habitat.

    Rare Great Hornbill sighted in Kerala

    About the Great Hornbill (Malamuzhakki Vezhambal)

    • Overview: The Great Hornbill (Buceros bicornis) is the largest hornbill species found in India.
    • Attributes: It is known for its striking yellow casque on the upper mandible, which is hollow and used in vocalisation and courtship.
    • Official Recognition: It is the State Bird of Kerala (as well as Arunachal Pradesh) and is revered in many indigenous cultures for its majestic appearance.
    • Conservation Status: It is listed as Endangered by the IUCN and is protected under Schedule I of the Indian Wildlife (Protection) Act, 1972.
    • Habitat: It primarily inhabit evergreen and moist deciduous forests, especially in the Western Ghats, the Himalayan foothills, and Northeast India.
    • Prey Behaviour: They are frugivorous, feeding mainly on figs and other forest fruits, but they may occasionally consume small mammals, birds, and insects.
    • Ecological Significance:  They are known as ‘forest engineers’ or ‘farmers of the forest’, they play a key role in seed dispersal of tropical trees, indicating the health and balance of their forest ecosystems.
    [UPSC 2016] In which of the following regions of India are you most likely to come across the ‘Great Indian Hornbill’ in its natural habitat? Options: (a) Sand deserts of northwest India (b) Higher Himalayas of Jammu and Kashmir (c) Salt marshes of western Gujarat (d) Western Ghats *

     

  • Why Tigers keep migrating?

    Why in the News?

    India’s tiger population is undergoing a major eastward expansion, as young male tigers from central India’s source reserves (like Kanha and Bandhavgarh) disperse into eastern forests (Jharkhand, Odisha, and West Bengal) in search of territory and mates.

    tiger

    Recent Incidents of Tiger Migration:

    • Bandhavgarh (MP) → Palamu (Jharkhand) → Purulia (WB) → Rescued and sent back to Palamu
    • Simlipal (Odisha) → Jharkhand → Lalgarh (WB) → Tiger killed by villagers
    • Tadoba (Maharashtra) → Simlipal (Odisha) → West Bengal → Zeenat the tigress translocated and dispersed

    Back2Basics: Royal Bengal Tiger

    • Declared National Animal of India in 1972 by the Indian Board for Wildlife (IBWL).
    • Largest population in India; also found in Bangladesh, Nepal, Bhutan, China, and Myanmar. India harbours 75% of the world’s wild tigers.
    • Occupies habitats such as high mountains, mangrove swamps, grasslands, deciduous forests, evergreen, and shola forests.
    • Ecological Significance:
      • Flagship species: Essential for conservation efforts since it’s the topmost predator in food chain.
      • Umbrella species: Protecting tigers helps conserve other species (through food chain regulation).
    • Protection Status:
      • Indian Wildlife (Protection) Act, 1972: Schedule I.
      • IUCN Red List: Endangered.
      • CITES: Listed in Appendix I.
    • Project Tiger is a wildlife conservation initiative in India that was launched in 1973.

    Behavioural Traits of Tigers Influencing Dispersal:

    • Territorial Independence: Upon maturity, male tigers must leave their natal territory to find exclusive prey-rich zones and mates, triggering long-distance dispersal.
    • Gendered Dispersal:
      • Males are wanderers – they cover vast areas and often cross multiple states.
      • Females are philopatric – they stay close to their birthplace and are usually accepted by nearby relatives.
    • Source-Sink Dynamics:
      • Source forests (e.g. Kanha, Bandhavgarh) produce surplus tigers due to good prey and protection.
      • Sink forests (e.g. Palamu, Dalma) cannot sustain tiger populations without new immigrants.
    • Adaptive but Risk-Prone: Tigers are biologically wired to explore new habitats, even degraded ones, but often face food scarcity, isolation, and human conflict.
    • Prey Dependence and Conflict: In prey-deficient forests, floater tigers’ resort to livestock hunting, increasing the risk of human-tiger conflict.
    • Resilience and Colonisation Instinct: Despite setbacks, tigers attempt to colonise new areas, offering hope for species expansion if supported by proper conservation.
    [UPSC 2024] Consider the following statements:

    1. Lions do not have a particular breeding season.

    2. Unlike most other big cats, cheetahs do not roar.

    3. Unlike male lions, male leopards do not proclaim their territory by scent marking.

    Which of the statements given above are correct?

    (a) 1 and 2 only*  (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3