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Subject: Biodiversity

1. Ecology & Ecosystems
2. Indian Biodiversity

  • New Fish Species Discovered: Butis bargabhimae in West Bengal

    Why in the News

    Scientists have discovered a new estuarine fish species, named Butis bargabhimae, in the Rupnarayan River near Tamluk.

    About the Species

    1. Classification

    • Family: Butidae (gudgeon gobies)
    • Habitat: Brackish water (estuaries)
    • Found where rivers meet the sea

    2. Discovery Process

    • Time: 2022–2024
    • Institutions: Tamralipta Mahavidyalaya and Vidyasagar University.
    • Method:
      • Field collection by local fishermen
      • Morphological + DNA analysis

    Unique Features

    • Presence of interorbital scales (between eyes)
    • Additional auxiliary body scales
    • Distinct light and dark bands on pectoral fins
    • DNA similarity only ~86% with closest relatives
    • Confirms it as a new species

    Naming Significance

    • Named after Bargabhima, a local deity of Tamluk
    • Reflects link between biodiversity and cultural heritage

    Scientific Importance

    • Taxonomic Clarity: Helped correct misidentification of similar species in:
      • India
      • Bangladesh
    • Role of DNA Barcoding: Shows importance of genetic tools in species identification
    • Hidden Biodiversity: Suggests many undiscovered species in Indian rivers and estuaries
    [2022] DNA Barcoding can be a tool to: 
    1. Assess the age of a plant or animal. 
    2. Distinguish among species that look alike. 
    3. Identify undesirable animal or plant materials in processed foods. 
    Select the correct answer using the code given below: 
    (a) 1 only (b) 3 only (c) 1 and 2 (d) 2 and 3
  • [17th March 2026] The Hindu OpED: Belem as a test of new model of forest finance

    PYQ Relevance[UPSC 2021] Describe the major outcomes of the 26th session of the Conference of the Parties (COP) to the UNFCCC. What are the commitments made by India in this conference?Linkage: TFFF emerges from COP30 processes, reflecting evolving climate finance architecture under UNFCCC, especially beyond traditional commitments like REDD+ and Glasgow pledges.

    Mentor’s Comment

    The Tropical Forest Forever Facility (TFFF) represents a paradigm shift in climate finance architecture by institutionalizing payments for forest conservation. However, it raises fundamental questions about governance, equity, and the role of indigenous communities. The Belém model provides critical insights into future global climate financing frameworks.

    What is Tropical Forest Forever Facility (TFFF)?

    The Tropical Forest Forever Facility (TFFF) is a Brazil-led global initiative designed to reward countries for maintaining standing tropical forests. Set to launch at COP30, this multi-billion-dollar fund seeks to raise $125 billion (25% public, 75% private) to generate annual returns that provide continuous financial incentives for forest conservation, aiming to make standing forests more valuable than felled ones. 

    Key Aspects of the TFFF:

    1. Funding Goal: $125 billion, with early contributions exceeding $5.5 billion from countries like Brazil, Indonesia, Norway, and Colombia.
    2. Mechanism: The initiative combines public and private investment, investing in a portfolio of bonds. The annual profits are then paid out to countries that effectively protect their forests, verified by satellite data.
    3. Indigenous Support: The facility mandates that at least 20% of the funds must go to Indigenous Peoples and Local Communities (IPLCs).
    4. Focus: It focuses on rewarding nations with existing low deforestation rates to keep forests standing, rather than only rewarding reduction. 

    Objectives:

    1. Permanent Conservation: Creating a self-sustaining financial model for long-term conservation rather than temporary projects.
    2. Economic Value: Assigning value to the standing forest ecosystem.
    3. Climate Action: Contributing to a 1.5°C goal by halting tropical deforestation.

    What distinguishes TFFF from earlier forest finance models?

    1. Shift in Approach: Rewards standing forests, not just avoided deforestation.
    2. Financial Structure: Ensures returns on investments, unlike donation-based REDD+ mechanisms.
    3. Scale of Funding: Mobilizes $5.5 billion initial commitments, including $3 billion from Norway.
    4. Performance Incentives: Mandates 20% of payments for indigenous and local communities.
    5. Participatory Design: Incorporates inputs from 400+ community leaders globally.

    Does the TFFF ensure inclusive and equitable governance?

    1. Governance Gap: Indigenous groups lack voting rights in core decision-making bodies.
    2. Power Asymmetry: Central governments retain control over fund allocation.
    3. Equity Concerns: Raises questions on true decentralization of financial authority.
    4. Institutional Risk: Weak local accountability may lead to elite capture of funds.
    5. Structural Inclusion Limits: Participation remains consultative, not decision-binding.

    Why is the TFFF being criticized as “colonial” in design?

    1. Intermediary Dominance: Benefits financial intermediaries over forest-dependent communities.
    2. Return-Oriented Model: Prioritizes financial returns over ecological outcomes.
    3. Structural Drivers Ignored: Fails to address agribusiness expansion, mining, oil extraction.
    4. Superficial Conservation: Risks rewarding preservation without reducing exploitation pressures.
    5. Narrative Control: Reinforces global North-South financial dependency patterns.

    Can financial mechanisms alone address forest degradation?

    1. Systemic Pressures: Infrastructure, extractive industries, and agriculture drive deforestation.
    2. Insufficient Funding: $4 per hectare (earlier proposals) inadequate for ecosystem services.
    3. Policy Disconnect: Financial flows do not align with land-use regulation reforms.
    4. Local Impact Risk: Funds may bypass communities without strong governance structures.
    5. Economic Trade-offs: Conservation competes with high-revenue extractive activities.

    How central are indigenous land rights to forest conservation?

    1. Land Rights Assertion: Indigenous communities demand recognition of territorial sovereignty.
    2. Exclusion Concerns: Many feel excluded from decision-making affecting their lands.
    3. Survival Linkage: Forest protection is tied to livelihoods and cultural identity.
    4. Global Advocacy: Calls for long-term funding supporting community governance models.
    5. Risk of Displacement: Weak safeguards may lead to land alienation and displacement.

    What institutional innovations accompany the TFFF?

    1. Digital Platform: Facilitates TFFF eligibility assessment and transparency mechanisms.
    2. Global Partnerships: Collaborates with UNDP, FAO, WWF, and GATC.
    3. Capacity Building: Supports technical assistance and peer collaboration.
    4. Conflict Safeguards: Ensures independence from governing structures to avoid conflicts of interest.
    5. Inclusion Framework: Promotes knowledge-sharing and participatory governance models.

    What determines the success of the Belém model?

    1. Delivery Mechanisms: Strong institutions ensure efficient and transparent fund utilization.
    2. Local Accountability: Strengthens community-level governance structures.
    3. Rights Integration: Secures indigenous land rights alongside financial flows.
    4. Structural Reform: Aligns conservation with broader economic and land-use policies.
    5. Outcome Orientation: Ensures funds translate into measurable ecological protection.

    Conclusion

    The TFFF represents a transition toward investment-based conservation finance, but its credibility depends on equity, governance, and structural reforms. Without integrating indigenous rights and accountability mechanisms, financial innovation alone cannot ensure sustainable forest conservation.

  • Rare ‘Dual-Sex’ Crab Discovered in Silent Valley

    Why in the News

    A rare freshwater crab species, Vela carli, found in Silent Valley National Park, has been discovered showing both male and female biological traits.

    What was discovered?

    • Scientists found three crabs exhibiting dual sexual characteristics
    • The condition is called Gynandromorphy
    • Example in this case:
    • Some body parts had male reproductive organs
    • Others had female features (gonopores)

    What is Gynandromorphy?

    • A rare biological condition where: An organism shows both male and female characteristics.
    • Usually caused by: Errors during cell division (chromosomal distribution). 
    • Important distinction:
      • Not hermaphroditism (where both reproductive organs function normally)
      • Instead, it is a mosaic of male and female tissues

    About Vela Carli

    • Vela carli is a freshwater crab species endemic to India, specifically found in the Central Western Ghats, one of the world’s richest biodiversity hotspots.
    [2013] Consider the following pairs: National Park : River flowing through the Park Corbett National Park : Ganga Kaziranga National Park : Manas Silent Valley National Park : Kaveri Which of the above pairs is/are correctly matched? (a) 1 and 2 (b) 3 only (c) 1 and 3 (d) None
  • FSI Stops AI-Based Deforestation Alerts to States

    Why in the News

    The Forest Survey of India (FSI) has stopped issuing fortnightly deforestation alerts through its AI-based Anavaran Deforestation Alert System. The portal has not been updated since November 2025.

    What was the Anavaran System?

    • An AI and satellite-based monitoring system launched in January 2024.
    • Provided deforestation alerts every 15 days to states.
    • Alerts included precise geographic coordinates where forest cover loss was detected.

    Purpose:

    • Enable quick field inspections by forest officials.
    • Improve near-real-time monitoring of deforestation.

    Technology Used

    The system used remote sensing and machine learning:

    • Google Earth Engine
    • Sentinel-2
    • Sentinel-1

    Features:

    • Optical satellite imagery (Sentinel-2).
    • Synthetic Aperture Radar (SAR) data from Sentinel-1 for cloudy or monsoon conditions.
    • Machine learning algorithms compared before-and-after images to detect forest loss.

    Performance of the System

    • 12,351 alerts issued between Jan 2024 and Oct 2025.
    • Average alerts per month: 561
    • Alerts increased to 1,028 per month during Nov–March, when deforestation peaks.

    Why Alerts Were Stopped

    • According to FSI officials:
      • The system was only a pilot project.
      • The government is currently reviewing feedback from states on its usefulness.
      • Active monitoring reportedly stopped in January 2026.

    Comparison with Global Systems

    • The system was considered similar to Terra‑I, used in countries like Peru. However, Anavaran had higher spatial resolution:
      • 10–20 metre resolution (Sentinel satellites)
      • Terra-I: 250 metre resolution

    Other Forest Monitoring Systems in India

    • Van Agni Portal
    • Fire alerts using satellite data have been operational since 2004.
    [2015] In which of the following activities are Indian Remote Sensing (IRS) satellites used? 1. Assessment of crop productivity 2. Locating ground water resources 3. Mineral exploration 4. Telecommunications 5. Traffic studies Select the correct answer using the code given below. (a) 1, 2 and 3 only (b) 4 and 5 only (c) 1 and 2 only (d) 1, 2, 3, 4 and 5
  • Cheetah Population in India Crosses 50 Under Project Cheetah

    Why in the News

    A Namibian cheetah Jwala gave birth to five cubs at Kuno National Park, taking India’s total cheetah population to 53. The development is a major milestone under Project Cheetah.

    Key Highlights

    • Five cubs born to Namibian cheetah Jwala.
    • Recently, another cheetah Gamini delivered four cubs at the same park.
    • Total cheetah population in India: 53.
    • Indian-born cubs: 33.
    • Successful litters in India: 10.

    About Project Cheetah

    • Launched on 17 September 2022 by Narendra Modi.
    • Eight cheetahs were translocated from Namibia to Kuno National Park.
    • Aim: Reintroduce cheetahs in India after extinction.

    Background

    • Cheetahs became extinct in India in 1952 due to hunting and habitat loss.
    • The species is the fastest land animal.

    Objectives of the Programme

    • Restore the cheetah population in India.
    • Re-establish a functional grassland ecosystem.
    • Promote wildlife tourism and conservation awareness.
    • Improve genetic diversity and species recovery.
    [2024] Consider the following statements: Lions do not have a particular breeding season. Unlike most other big cats, cheetahs do not roar. 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
  • Silent Valley Bird Survey

    Why in the News
    A recent bird survey in Silent Valley National Park recorded 192 bird species, highlighting the park’s rich avian biodiversity.

    Key Findings

    • Survey dates: March 6 to 8, 2026
    • Organisers:
      • Kerala Forest Department
      • Malabar Natural History Society
    • Participants: About 85 birdwatchers from Kerala and Tamil Nadu.
    • Covered both core and buffer zones of the park.

    Important Observations

    • Total species recorded: 192 bird species
    • Rare migratory birds: Asian house martin and Western house martin. 

    Endemic Western Ghats species recorded:

    • Nilgiri laughingthrush
    • Black-and-orange flycatcher
    • White-bellied treepie
    • Nilgiri pipit
    • White-bellied blue flycatcher
    • Nilgiri sholakili (Nilgiri blue robin)

    About Silent Valley National Park

    • Located in Palakkad.
    • Part of the Western Ghats biodiversity hotspot.
    • Known for tropical evergreen forests and high endemism.
    [2020] With reference to India’s biodiversity, Ceylon frogmouth, Coppersmith barbet, Graychinned minivet and White-throated redstart are: (a) Birds (b) Primates (c) Reptiles (d) Amphibians
  • Land Use Change Reshaping Spider Communities in the Himalayas

    Why in the News

    A new study published in Insect Conservation and Diversity by researchers from the Wildlife Institute of India finds that land use change and elevation are significantly reshaping spider communities in the north western Indian Himalayas, potentially reducing ecosystem resilience.

    What Did the Study Examine?

    • Surveyed spiders along an elevational gradient of 1,500 to 4,500 metres in Himachal Pradesh.
    • Compared three land use types:
      • Forests
      • Agricultural lands
      • Human dominated regions
    • Recorded:
      • 2,936 individuals
      • 126 species
      • 65 genera
      • 26 families

    What is Functional Diversity?

      • Functional diversity refers to the ecological roles species perform, rather than just counting the number of species.
    • Examples of spider traits studied:
        • Circadian activity
        • Hunting strata
        • Ballooning ability
        • Hunting guild
        • Prey range
    • Higher functional diversity means:
      • Greater ecological stability
      • Better pest control
      • More resilience against disturbances

    Key Findings

    • Decline with Elevation: Species richness and functional redundancy decrease with altitude, with a critical threshold around 3,000 to 3,500 metres near the Himalayan treeline, increasing ecosystem vulnerability.
    • Agricultural Homogenisation: Functional diversity remains stable across elevations in agricultural areas, indicating trait homogenisation due to intensification, with dominance of ground dwelling spiders like Lycosidae.
    • Forest Elevational Gradients: Forest ecosystems show clear trait shifts with altitude, with communities largely dominated by cathemeral species.
    • Human Dominated Landscapes: Greater trait richness at lower elevations supports the intermediate disturbance hypothesis, with presence of synanthropic species adapted to human environments.

    Ecological Importance of Spiders

    • Among the most voracious arthropod predators.
    • Consume over 600 million tonnes of insects annually.
    • Help regulate pest populations and disease vectors.
    • Act as bioindicators of habitat disturbance.
    [2011] The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon? (a) It has a high rainfall that supports luxuriant vegetative growth. 

    (b) It is a confluence of different biogeographical zones. 

    (c) Exotic and invasive species have not been introduced in this region. 

    (d) It has less human interference.

  • India Among Four Nations Driving Global Pesticide Toxicity

    Why in the News

    A new study published in Science finds that India is among four countries contributing nearly 70 percent of the world’s Total Applied Toxicity (TAT) from agricultural pesticides. Experts have also raised concerns that the proposed Pesticides Management Bill 2025 may weaken safeguards compared to the older law.

    What is Total Applied Toxicity (TAT)?

    • TAT measures not just the quantity of pesticides used, but their toxicity and lethality to non target species.
    • Researchers analysed over 600 pesticides across 65 countries from 2013 to 2019.
    • Global TAT has increased, especially for around 20 commonly used agricultural pesticides.

    Countries Driving Global TAT

    • Four major contributors: China, Brazil, United States, and India
    • Together, they account for nearly 70 percent of global pesticide toxicity.
    • Only Chile is currently on track to meet the UN target of reducing pesticide risk by 50 percent by 2030.

    Impact on Biodiversity

    Species most affected:

    1. Terrestrial arthropods
    2. Soil organisms
    3. Fish
    4. Pollinators
    5. Aquatic plants
    6. Terrestrial vertebrates

    Regions with high increases include sub Saharan Africa and parts of the Indian subcontinent.

    Link to Global Commitments

    • At the 2022 United Nations Biodiversity Conference, countries committed to reducing pesticide risk by 50 percent by 2030. The findings indicate that global progress is not on track.

    Indian Legal Framework

    1. Insecticides Act 1968

    • Focused mainly on agricultural use
    • Limited regulation of domestic and non agricultural applications
    • Considered outdated
    • India reportedly uses several pesticides that are banned in parts of Europe, such as paraquat.

    2. Pesticides Management Bill 2025

    • Proposed to replace the 1968 Act
    • Aims to reduce risk to people and environment
    • Encourages biological and traditional knowledge based alternatives
    • Experts warn that without stronger liability and monitoring provisions, it may not significantly improve regulation
    [2019] In India, the use of carbofuran, methyl parathion, phorate and triazophos is viewed with apprehension. These chemicals are used as: 

    (a) pesticides in agriculture 

    (b) preservatives in processed foods 

    (c) fruit-ripening agents 

    (d) moisturising agents in cosmetics

  • Great Nicobar Mega Project Cleared by NGT

    Why in the News?

    A special bench of the National Green Tribunal has declined to interfere with the environmental clearance granted to the ₹80,000 crore Great Nicobar Mega Infrastructure Project, citing its strategic importance and the presence of adequate safeguards.

    About Great Nicobar Island

    • The southernmost island of the Nicobar group
    • Located in the southeastern Bay of Bengal
    • Area: ~910 sq km
    • Largely covered with tropical rainforest
    • Ecologically sensitive and sparsely populated

    About the Great Nicobar Mega Project

    • Total project area: 166 sq km
    • Forest diversion: 130 sq km
    • Trees to be felled: Nearly 1 million

    Major Components:

    • International transshipment port
    • Integrated township
    • Civil and military airport
    • 450 MVA gas and solar based power plant

    Key Environmental Issues Raised

    • Violation of the Island Coastal Regulation Zone notification 2019
    • Development in prohibited ICRZ areas
    • Insufficient baseline environmental data
    • Threat to endemic biodiversity and coral reefs
      • The NGT relied on findings of a High Powered Committee constituted after its 2023 order.

    NGT’s Key Observations

    1. No part of the project falls in prohibited ICRZ areas as per committee findings
    2. Environmental clearance contains adequate safeguards
    3. Strategic importance of the project cannot be ignored
    4. Balanced approach required between ecology and development

    About Island Coastal Regulation Zone ICRZ

    • Notified under Environment Protection Act 1986
    • Regulates development in coastal areas of Andaman and Nicobar and Lakshadweep islands
    • Categorises areas such as ICRZ IA and IB with varying restrictions
    [2017] Which of the following is geographically closest to Great Nicobar? (a) Sumatra 

    (b) Borneo 

    (c) Java 

    (d) Sri Lanka

  • New Dragonfly Species Discovered in Kerala

    Why in the News

    Researchers have identified and described a new species of dragonfly from Kerala, named Lyriothemis keralensis, highlighting the rich and still underexplored biodiversity of the Western Ghats.

    Key Facts 

    • Scientific name: Lyriothemis keralensis
    • Taxonomic group: Order Odonata, Family Libellulidae
    • Location of discovery: Varapetty near Kothamangalam, Ernakulam district, Kerala
    • Habitat:
      • Vegetated pools and irrigation canals
      • Shaded pineapple and rubber plantations
    • Seasonal visibility:
      • Adult dragonflies seen only during the Southwest monsoon from late May to August
      • Remains in aquatic larval stage during the rest of the year
    [2023] Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food? 

    (a) Butterflies 

    (b) Dragonflies   

    (c) Honeybees 

    (d) Wasps