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Subject: Biodiversity

1. Ecology & Ecosystems
2. Indian Biodiversity

  • Species in news: Garcinia kusumae

    Why in the News?

    Researchers in Assam have discovered a new tree species, Garcinia kusumae, locally called thoikora, adding to the Garcinia genus in a notable botanical find.

    About Garcinia kusumae:

    • Species Identity: Garcinia kusumae is a newly discovered evergreen tree species that is endemic to Assam, India.
    • Genus and Local Name: It belongs to the Garcinia genus, locally called thoikora in Assamese.
    • Discovery: It was discovered in 2024 by Jatindra Sarma, during a field survey in Bamunbari, Baksa district.
    • Botanical Traits: It is dioecious, grows up to 18 metres, flowers between February and April, and fruits between May and June.
    • Distinct Features: It differs from similar species by having up to 15 staminate flowers per fascicle, fewer stamens, and blackish resinous berries.
    • Ethnobotanical Uses: Its fruit is used in sherbet, fish curries, and for diabetes and dysentery remedies; the seed aril is eaten raw with condiments.

    What is the Garcinia Genus?

    • Taxonomy: Garcinia is the largest genus in the Clusiaceae family, comprising trees and shrubs.
    • Geographical Spread: It is found in tropical regions of Africa, Southeast Asia, and Australasia, especially in rainforests.
    • Notable Characteristics: The genus is known for floral diversity, medicinal value, and culinary applications.
    • Presence in India: India hosts 33 species and 7 varieties of Garcinia, with Assam having 12 species and 3 varieties.
    • Famous Species: Commonly known species include Garcinia indica (kokum), Garcinia cowa, and Garcinia mangostana (mangosteen).
    • Utility and Significance: It is important for ethnobotanical uses, rural livelihoods, and climate-resilient forestry.
    • Traditional Practices: Several species are used in traditional food, medicine, and rituals.
    [UPSC 2016] Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp.

    In which part of India has it been discovered?

    Options: (a) Andaman Islands* (b) Anaimalai Forests (c) Maikala Hills (d) Tropical rain forests of northeast

     

  • ZSI records 683 faunal discoveries in its 110th year

    Why in the News?

    The Zoological Survey of India (ZSI) released Version 2.0 of the Checklist of Fauna of India, documenting 105,244 species and subspecies.

    Back2Basics: Zoological Survey of India

    • The ZSI was set up by British zoologist Thomas Nelson Annandale in 1916.
    • It is the premier taxonomic research organisation in India, based in Kolkata.
    • It was established to promote surveys, exploration and research leading to the advancement of our knowledge of various aspects of the exceptionally rich animal life of India.
    • The ZSI had its genesis as the Zoological Section of the Indian Museum at Calcutta in 1875.
    • Since its inception, the ZSI has been documenting the diversity and distribution of the fauna of India towards carrying out its mandate of conducting exploration-cum-taxonomic-research programmes.
    • The ZSI has published an extremely large amount of information on all animal taxa, from Protozoa to Mammalia.

    Key Findings About ZSI’s Work and Discoveries (2024–25):

    • Significant Animal Discoveries:
      • New Genus: Dravidoseps gouensis – a new genus of skink (lizard) from Western Ghats
      • New Species of Snakes: Anguiculus dicaprioi – named after actor Leonardo DiCaprio, belongs to the Colubridae family
      • Other Reptiles: 2 new genera and 37 new species of reptiles discovered
      • Amphibians: 5 new amphibian species, including frogs from northeastern and southern India
      • Other Invertebrates: Multiple new insect species, particularly among beetles, moths, flies, and bees
    • Highest representation among newly discovered species were insects, especially:
      • Coleoptera (beetles)
      • Lepidoptera (moths and butterflies)
      • Diptera (flies)
      • Hymenoptera (ants, bees, wasps)
    [2020] With reference to India’s Biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are:

    (a) Birds

    (b) Primates

    (c) Reptiles

    (d) Amphibians

     

  • New flowering plant named after Nyishi Tribe

    Why in the News?

    A new species of flowering plant, Begonia nyishiorum, has been discovered in the East Kameng district of Arunachal Pradesh.

    New flowering plant named after Nyishi Tribe

    About Begonia nyishiorum:

    • Overview: Begonia nyishiorum is a recently identified flowering plant found in East Kameng, Arunachal Pradesh, and is endemic to this region.
    • Scientific Recognition: It was officially described in June 2025 in Novon, a peer-reviewed journal published by the Missouri Botanical Garden.
    • Feature: The species is notable for its crimson, fringed scales (indumentum) on light green petioles, a distinct trait among Asian begonias.
    • Habitat and Range: It thrives on moist, shaded mountain slopes between 1,500 and 3,000 metres in altitude.
    • Ecological Sensitivity: Known from only two forest locations, the plant is potentially vulnerable and warrants conservation attention.
    • Name Origin: The species name nyishiorum honours the Nyishi tribe, known for their traditional ecological stewardship of local forests.

    About the Nyishi Tribe:

    • Overview: The Nyishi are the largest ethnic group in Arunachal Pradesh, with a population of about 300,000.
    • Name Meaning: The word “Nyishi” combines “Nyi” (man) and “Shi” (being), signifying a civilised human in their language.
    • Linguistic Identity: Their language belongs to the Sino-Tibetan family, although its origins remain debated among scholars.
    • Geographic Spread: They live in eight districts of Arunachal Pradesh (like East Kameng, Papum Pare, and Kurung Kumey) and parts of Assam.
    • Livelihood Practices: Their economy includes slash-and-burn farming, hunting, fishing, and handicrafts such as bamboo work and weaving.
    • Key Festivals: They celebrate Boori-Boot (Feb) for unity, Nyokum (Feb) for prosperity, and Longte (Apr) for protection from evil.
    • Social Structure: Nyishi society is patrilineal and clan-based, with no caste system or rigid social hierarchy.
    • Role of Women: Women are seen as symbols of peace and prosperity, and marriages involve reciprocal family exchanges that build community ties.
    [UPSC 2016] Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp.

    In which part of India has it been discovered?

    Options: (a) Andaman Islands* (b) Anaimalai Forests (c) Maikala Hills (d) Tropical rain forests of northeast

     

  • Spartaeus karigiri: New jumping Spider Species discovered in Karnataka

    Why in the News?

    Researchers from Chennai have discovered a new species of jumping spider, ‘Spartaeus karigiri’, belonging to the Spartaeinae subfamily.

    About the Spartaeus karigiri :

    • Spartaeus karigiri is a newly discovered species of jumping spider, part of the Spartaeinae subfamily within the Salticidae (jumping spider) family.
    • It was first identified in the Karigiri (Elephant Hill) region of Devarayanadurga, Karnataka, and is named after this location.
    • The species marks the first recorded instance of the Spartaeus genus being found in India, extending its previously known range from Southeast Asia.
    • Field specimens were also collected from Villupuram district in Tamil Nadu, suggesting a broader habitat.

    Key Features:

    • Genus Identification: Belongs to the Spartaeus genus, known for its intelligent predation and visual hunting tactics.
    • Habitat: Found in rocky outcrops and forested terrain; prefers crevices and protected microhabitats.
    • Hunting Behaviour: Likely exhibits web-invasion hunting methods and prey mimicry, similar to other Spartaeinae members.
    [UPSC 2025] Regarding the Peacock tarantula (Gooty tarantula), consider the following statements:

    I. It is an omnivorous crustacean.

    II. Its natural habitat in India is only limited to some forest areas.

    III. In its natural habitat, it is an arboreal species.

    Which of the statements given above is/are correct?

    (a) I only (b) I and III (c) II only (d) II and III *

     

  • Pedicularis rajeshiana: New plant species from Himalayas

    rajesh

    Why in the News?

    A new plant species named Pedicularis rajeshiana has been discovered in the western Himalayas of India.

    About Pedicularis rajeshiana:

    • Discovery: It is a newly discovered plant species found at Rohtang Pass, Himachal Pradesh, at an altitude of 4,390 metres.
    • Research Publication: The discovery was made by a scientist from the Botanical Survey of India (BSI), Dehradun, and published in the journal Phytotaxa.
    • Plant Family: It belongs to the Orobanchaceae family and is part of the Lousewort group of plants.
    • Plant Type: It is a hemiparasitic plant, meaning it draws some nutrients from nearby plants but also performs photosynthesis.
    • Habitat: Grows on shaded, rocky mountain slopes, making it rare and possibly endangered due to its specific environment.
    • Diversity: With this addition, India now has 83 Pedicularis species, including 36 in the western Himalayas.

    Key Features of the Plant:

    • Unique Floral Structure:
      • Flowers have a deeply cut lower lip and stamens at three different levels — a very rare combination.
      • Some flowers show a twin galea (double hood), never observed before in this genus, possibly an evolutionary trait to enhance pollination.
    • Microscopic Details: Pollen grains have a croton-like texture and a distinct shape, confirmed through microscope studies.
    • Distinctiveness: Compared to related species like P. porrecta and P. heydei, this plant is smaller, with fewer flowers and leaflets.
    [UPSC 2018] Why is a plant called Prosopis juliflora often mentioned in news?

    Options: (a) Its extract is widely used in cosmetics. (b) It tends to reduce the biodiversity in the area in which it grows. * (c) Its extract is used in the synthesis of pesticides. (d) (None of the above.

     

  • Biological Diversity (Access and Benefit Sharing) Regulation, 2025

    Why in the News?

    The National Biodiversity Authority (NBA) has released new rules to regulate access to biological resources and ensure fair and equitable benefit sharing, as approved by the Central Government.

    About New Biodiversity Regulation, 2025:

    • It governs how benefits from the use of biological resources and associated traditional knowledge or digital sequence information (DSI) are to be shared.
    • It introduces a tiered benefit-sharing structure based on annual turnover of the user:
      • No sharing for turnover up to ₹5 crore.
      • 0.2% for turnover between ₹5–50 crore.
      • 0.4% for ₹50–250 crore, and 0.6% above ₹250 crore.
    • Users must submit resource usage statements annually if turnover exceeds ₹1 crore.
    • Cultivated medicinal plants are exempt, aligning with the Biodiversity (Amendment) Act, 2023.
    • For high-value or threatened species like red sanders, agarwood, and sandalwood, sharing must be at least 5%, rising to 20% or more for commercial use.
    • The Regulation covers researchers, IP right seekers, and includes digital data as part of benefit sharing for the first time.

    Back2Basics: Convention on Biological Diversity (CBD):

    • CBD was adopted at the 1992 Rio Earth Summit; it came into force since 29 December 1993 with secretariat in Montreal, Canada.
    • It is ratified by 196 countries, excluding the US.
    • Key objectives:
      • Conservation of biological diversity.
      • Sustainable use of biodiversity components.
      • Fair sharing of benefits from genetic resources.
    • It is governed by the Conference of the Parties (COP), meeting biennially.
    • COP16 (2024) in Colombia established a multilateral benefit-sharing mechanism for Digital Sequence Information (DSI).
    • It ensures fair reward for communities protecting biodiversity when their knowledge or genetic data is used commercially.

    Nagoya Protocol on ABS:

    • It was adopted in 2010, enforced in 2014, it supplements the CBD.
    • It provides a legal framework for fair benefit-sharing from the use of genetic resources with the country of origin or local communities.
    • It strengthens the global framework for responsible biodiversity use.

     

    [UPSC 2023] Consider the following statements:

    1. In India, the Biodiversity Management Committees are key to the realization of the objectives of the Nagoya Protocol.

    2. The Biodiversity Management Committees have important functions in determining acces and benefit sharing, including the power to levy collection fees on the access of biological resources within its jurisdiction.

    Which of the statements given above is/are correct?

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

     

  • New frog species ‘Leptobrachium aryatium’ discovered in Assam

    Why in the News?

    A 21-year-long study has resulted in the discovery of a new frog species, Leptobrachium aryatium, named after Arya Vidyapeeth College in Assam.

    About the frog ‘Leptobrachium aryatium’

    • Leptobrachium aryatium, a newly discovered species of frog, was found in the Garbhanga Reserve Forest, located on the southwestern edge of Guwahati, Assam, near the Meghalaya border.
    • The species was identified through a re-analysis of past research and new studies on the Leptobrachium genus.
    • Key Features:
      • Distinctive Eyes: The frog has fiery orange-and-black eyes, setting it apart from other species in the genus.
      • Reticulated Throat Pattern: A unique reticulated pattern on its throat adds to its distinct appearance.
      • Smooth, Rhythmic Call: Emits a smooth, rhythmic call at dusk, a feature unique to this species in the genus.
      • Molecular and Morphological Distinctiveness: DNA analysis and physical studies confirmed it as a new species, distinguished by its unique call and appearance.
    [UPSC 2016] Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?

    (a) Andaman Islands* (b) Anaimalai Forests (c) Maikala Hills (d) Tropical rain forests of northeast

     

  • Over 1,000 species of Fungi threatened with extinction: IUCN

    Why in the News?

    The International Union for Conservation of Nature (IUCN) Red List now includes 1,300 fungi species, of which 1000 species are at risk of extinction due to various environmental pressures.

    Important Species under Threat:

    • Fibrous Waxcap (Hygrocybe intermedia): A Vulnerable species of fungi found in Europe, facing threats from habitat loss and land-use changes.
    • 279 Species at Risk: Threatened by deforestation, agricultural expansion, and urban development, leading to habitat loss.
    • 91 Species Threatened by Pollution: Nitrogen and ammonia runoff from fertilizers and industrial activities.
    • 50+ Species at Risk Due to Fire Patterns: Changes in fire cycles, especially in USA, making certain fungi species vulnerable in forest ecosystems.

    About Fungi:

    • Fungi belong to the kingdom Fungi, distinct from animals, plants, and bacteria. They are eukaryotic organisms and include moulds, yeasts, mushrooms, and mildews.
    • Key Properties:
      • Fungi have chitin in their cell walls and form hyphae that create a mycelium network.
      • They are heterotrophic, absorbing nutrients from organic material.
      • They reproduce sexually and asexually through spores.
    • Types of Fungi:
      • Molds: Multicellular, fuzzy fungi.
      • Yeasts: Unicellular fungi used in fermentation.
      • Mushrooms: Fruiting bodies of certain fungi, often edible.
    • Ecological Role: Fungi are crucial in decomposition and nutrient cycling. Some form beneficial relationships with plants (mycorrhizae) to aid in nutrient absorption.
    • Uses:
      • Medicines: Fungi like penicillin have revolutionized medicine.
      • Food: Edible fungi include mushrooms and truffles.
      • Beverages: Yeasts are key in bread, beer, and wine production.
    [UPSC 2021] Which of the following have species that can establish symbiotic relationship with other organisms?​

    1. Cnidarians​

    2. Fungi ​

    3. Protozoa​

    Select the correct answer using the code given below:

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

     

  • Commission on Genetic Resources for Food and Agriculture (CGRFA)

    Why in the News?

    The 20th meeting of the Commission on Genetic Resources for Food and Agriculture (CGRFA-20) is currently underway in Rome.

    About Commission on Genetic Resources for Food and Agriculture (CGRFA)

    • The CGRFA is the only permanent intergovernmental body addressing all components of biodiversity-related to food and agriculture.
    • It was established in 1983 as the Commission on Plant Genetic Resources for Food and Agriculture.
    • It operates under the Food and Agriculture Organization (FAO) of the United Nations.
    • It aims to create international consensus on managing biodiversity in food systems and ensuring the fair and equitable sharing of benefits from these genetic resources.
    • Membership: 179 countries (including India) and the European Union
    • Focus: Coordinates global efforts on biodiversity affecting agriculture, forestry, livestock, and aquatic species, including pollinators, soil organisms, and other vital species for food production.

    Structure and Mandate

    • Structure:
      • Governed by a biennial session where member countries discuss and make decisions.
      • A bureau, elected by member states, guides the Commission’s work.
      • The CGRFA Secretariat, hosted by FAO, offers technical and logistical support.
    • Mandate:
      • Policy Formulation: Develops global action plans, codes of conduct, and policy instruments for sustainable use and conservation of genetic resources for food and agriculture.
      • Global Assessments: Guides preparation of periodic assessments to monitor the status and trends of genetic resources and biodiversity.
      • Sustainable Use of Biodiversity: Promotes biodiversity use for food security, sustainable agriculture, and climate adaptation.
      • Fair and Equitable Benefit Sharing: Ensures fair distribution of benefits from genetic resources, especially plant materials under international treaties.
    • Achievements:
      • International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA): Adopted in 2001, it recognizes farmers’ contributions to crop diversity and provides a global system for accessing plant genetic materials for breeders, farmers, and scientists.
    [UPSC 2014] Consider the following international agreements:

    1. The International Treaty on Plant Genetic Resources for Food and Agriculture

    2. The United Nations Convention to Combat Desertification

    3. The World Heritage Convention

    Which of the above has / have a bearing on the biodiversity?

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

     

  • What is Wallace Line?

    Why in the News?

    In the 19th century, English naturalist Alfred Russel Wallace observed a sharp shift in biodiversity as he moved from Asia to Australia, leading him to propose the Wallace Line—an imaginary boundary separating species from both regions.

    wallace line

    About the Wallace Line:

    • It is a bio-geographical boundary separating Asia and Australia’s eco-zones.
    • It was identified by Alfred Russel Wallace in 1863 during his explorations.
    • It is an imaginary line running through the Lombok Strait (between Bali and Lombok) and the Makassar Strait (between Borneo and Sulawesi).
    • Distinct evolutionary histories:
      • West of the line (Asia): Tigers, elephants, and orangutans.
      • East of the line (Australia): Kangaroos, marsupials, and cockatoos.
    • A very few species cross the line, particularly birds and mammals.
    • This is a barrier for land species but not marine life.
    • Its formation:
      • Continental drift: Australia separated from Antarctica and moved toward Asia (~35 million years ago). This created a deep-water channel, preventing species migration.
      • Pleistocene Epoch Influence: Lower sea levels exposed land bridges but deep waters maintained the boundary.

    Scientific Relevance:

    • Wallace Line is more of a gradient than a strict boundary.
    • Understanding biogeography helps predict species adaptation to climate change.

    Note: 

    Weber Line more accurately defines the balance point where the influence of Asian and Australian species is nearly equal, whereas the Wallace Line marks a sharper divide.