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Type: Species

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

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Fungi

    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

     

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  • Wildlife Conservation Efforts

    Species in News: Marbled Cat

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Marbled Cat

    Species in News: Marbled Cat

    Why in the News?

    The elusive marbled cat (Pardofelis marmorata) has been spotted in Dehing Patkai National Park in Assam’s Tinsukia district.

    About Marbled Cat

    • The marbled cat is a small wild cat species native to South and Southeast Asia.
    • It belongs to the Felidae family and is closely related to the clouded leopard (Neofelis nebulosa) and the bay cat (Catopuma badia).
    • The species was first described in 1836 by British zoologist William Charles Linnaeus Martin.
    • It is characterised by brown, gray, or yellowish fur with distinctive black spots, marbled patterns, and stripes for camouflage.
    • It is found in dense tropical and subtropical forests at elevations up to 2,500 meters.
    • It primarily inhabits rainforests, evergreen forests, and mountainous terrain.
    • It is arboreal, spending a significant amount of time in trees.
    • It is nocturnal and crepuscular, meaning it is most active at dawn and dusk.
    • Conservation Status:
      • IUCN Red List Status: Near Threatened (NT) due to habitat loss and fragmentation.
      • CITES: Appendix I

    About Dehing Patkai National Park

    • Dehing Patkai NP is located in the Dibrugarh and Tinsukia districts of Assam, India, near the border with Arunachal Pradesh.
    • It spans an area of 231.65 km² and is part of the Dehing Patkai Elephant Reserve. It was upgraded to a national park in 2020 and officially notified in 2021.
    • The park features the largest stretch of lowland rainforests in India, including Dipterocarp trees, orchids, and medicinal plants like Rauvolfia serpentina and Acorus calamus.
    • The park is home to diverse wildlife, including Bengal tigers, leopards, clouded leopards, Asian elephants, and Hoolock gibbons.
      • It is unique for hosting seven species of wild cats.
    • The Dehing River flows through the park, nourishing its forests and contributing to the biodiversity.
    • Indigenous communities such as the Tai Phake, Khamti, and Singpho tribes have lived in the area for generations, maintaining a close relationship with the forest.
    • The park is situated in the Patkai Hills region, part of the Indo-Myanmar biodiversity hotspot, known for its rich biodiversity.
    • Known as the Amazon of the East, Dehing Patkai National Park is famous for its pristine rainforest ecosystems and significant biodiversity.

     

    PYQ:

    [2015] Which one of the following National Parks has a climate that varies from tropical to subtropical, temperate and arctic?

    (a) Khangchendzonga National Park

    (b) Nandadevi National Park

    (c) Neora Valley National Park

    (d) Namdapha National Park

     

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  • Wildlife Conservation Efforts

    First Comprehensive Survey of River Dolphins in India

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: River Dolphins in India

    Why in the News?

    India’s first-ever comprehensive river dolphin survey conducted under Project Dolphin (2020) has estimated a population of 6,327 dolphins, primarily across the Ganga, Brahmaputra, and Indus River basins.

    First Comprehensive Survey of River Dolphins in India

    River Dolphins in India:

    Species Habitat Conservation Status Key Features & Threats
    Ganges River Dolphin (Platanista gangetica)

    		 Ganges-Brahmaputra-Meghna & Karnaphuli river systems (India, Bangladesh, Nepal) IUCN: Endangered
    WPA, 1972: Schedule I    		 Known as “Susu”, India’s National Aquatic Animal in 2009. Faces threats from pollution, habitat fragmentation, and accidental bycatch.

    Vikramshila Gangetic Dolphin Sanctuary (Bihar) – Only dolphin sanctuary in India.
    Indus River Dolphin (Platanista minor)

    		 Indus River (Pakistan) & Beas River (India) IUCN: Endangered
    WPA, 1972: Schedule I    		 One of the rarest dolphins, facing population decline due to water diversion, dam construction, and habitat degradation.

    Beas Conservation Reserve (Punjab) – Focused on Indus River Dolphin protection.
    Irrawaddy Dolphin (Orcaella brevirostris)

    		 Chilika Lake (India) & rivers of South & Southeast Asia IUCN: Endangered
    WPA, 1972: Schedule I    		 Known for “spy-hopping” behavior (rising vertically to observe surroundings). Threatened by fishing nets and habitat destruction.

    Key Highlights of the Survey

    • The survey estimated the Ganges River dolphin population at 6,324, with Uttar Pradesh (2,397) and Bihar (2,220) recording the highest numbers, while the Brahmaputra basin had 635 dolphins, indicating a stable population.
    • The Indus River dolphin population was found to be critically low, with only 3 individuals recorded in the Beas River in Punjab, highlighting the urgent need for conservation efforts.
    • Key habitats were identified, with the highest dolphin concentrations observed in the Bhind-Pachnada stretch of the Chambal River and the Chausa-Manihari stretch of the Ganga.
    • Dolphins were found to prefer deep water zones, confluences, mid-channel islands, and meandering sections of rivers, indicating specific habitat requirements.

    PYQ:

    [2015] Which one of the following is the national aquatic animal of India?

    (a) Saltwater crocodile
    (b) Olive ridley turtle
    (c) Gangetic dolphin
    (d) Gharial

     

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  • Wildlife Conservation Efforts

    Species in news: Gharials

    Prelims OnlySpecies | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Gharial

    Why in the News?

    Madhya Pradesh CM released 10 gharials into the Chambal River at the National Chambal Gharial Sanctuary in Morena.

    Species in news Gharials

    About Gharial

    • The gharial (Gavialis gangeticus) is a unique species of crocodilian, characterized by its long, slender snout, which is perfectly adapted for catching fish.
    • The species derives its name from the “ghara”, a bulbous growth found on the snouts of adult males, which aids in vocalization and mating displays.
    • It is a fish-eating crocodile native to the Indian subcontinent.
    • They are a crucial indicator of clean river water.

    Conservation Status:

    • Recognizing the rapid decline in gharial populations, India launched captive breeding and release programs in the late 1970s.
    • Between 1975 and 1982, the country established 16 captive breeding centers and 5 protected sanctuaries to ensure the survival of the species.
    • Gharials are ‘Critically Endangered’ in the IUCN Red List of Species.
    • The species is also listed under Schedule I of the Wildlife (Protection) Act, 1972.
    • Today, gharials primarily survive in 5 major refuges:
    1. National Chambal Sanctuary (NCS) – The largest stronghold of gharials.
    2. Katerniaghat Wildlife Sanctuary in Uttar Pradesh.
    3. Chitwan National Park in Nepal.
    4. Son River Sanctuary in Madhya Pradesh.
    5. Satkosia Gorge Sanctuary in Odisha.

    PYQ:

    [2013] Consider the following fauna of India:

    1. Gharial

    2. Leatherback turtle

    3. Swamp deer

    Which of the above is/are endangered?

    (a) 1 and 2 only

    (b) 3 only

    (c) 1, 2 and 3

    (d) None

     

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  • New Species of Plants and Animals Discovered

    Loggerhead Turtles use Geomagnetic Field to navigate large Distances

    Prelims OnlySpecies | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Loggerhead Turtles

    Loggerhead Turtles use Geomagnetic Field to navigate large Distances

    Why in the News?

    A new study in Nature reveals that loggerhead turtles can learn and remember the magnetic signature of an area, using Earth’s geomagnetic field for navigation during long migrations.

    About Loggerhead Sea Turtles (Caretta caretta)

    • Loggerhead Sea Turtles belong to the Cheloniidae family, widely distributed across the world’s oceans.
    • They are commonly found in Atlantic, Pacific, Indian Oceans, and the Mediterranean Sea.
    • They Spends most of its life in saltwater and estuarine habitats, coming ashore only to nest.
    • They are omnivorous, feeding primarily on bottom-dwelling invertebrates.
    • It is listed as Vulnerable by the International Union for Conservation of Nature (IUCN).
    • International trade banned under CITES Appendix I.

    Significance of the study

    • Loggerhead turtles travel thousands of kilometers across oceans and return to the same feeding and nesting sites.
    • Their ability to store magnetic memories helps them navigate vast distances, reinforcing the hypothesis that other migratory species may also rely on Earth’s magnetic field.

    PYQ:

    [2019] Consider the following statements:

    1. Some species of turtles are herbivores.
    2. Some species of fish are herbivores.
    3. Some species of marine mammals are herbivores.
    4. Some species of snakes are viviparous.

    Which of the statements given above are correct?

    (a) 1 and 3 only
    (b) 2, 3 and 4 only
    (c) 2 and 4 only
    (d) 1, 2, 3 and 4

     

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  • NGT issues notice to Centre on use of invasive fish species for mosquito control

    Prelims OnlySpecies | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Mosquitofishes

    Why in the News?

    The National Green Tribunal (NGT) has sought a response from the Central government regarding the use of two highly invasive and alien fish species—Gambusia affinis (Mosquitofish) and Poecilia reticulata (Guppy)—as biological agents for mosquito control in multiple states.

    Both species are classified as “invasive and alien” by the National Biodiversity Authority (NBA).

    About Gambusia Affinis (Western Mosquitofish)

    • It has been widely introduced worldwide as a biological control agent to reduce mosquito populations.
    • The mosquitofish primarily feeds on mosquito larvae, small insects, and zooplankton.
    • Despite its intended benefits, Gambusia affinis has been identified as one of the world’s most invasive species.
    • It is highly aggressive and competes with native fish for resources.
    • It also preys on the eggs and juveniles of indigenous fish, amphibians, and invertebrates, leading to a decline in local biodiversity.
    • The Invasive Species Specialist Group (ISSG) has listed it among the 100 worst invasive species globally due to its harmful ecological impact.

    About Poecilia Reticulata (Guppy, Millionfish, Rainbow Fish)

    • Poecilia reticulata, commonly known as the Guppy, Millionfish, or Rainbow Fish, is a small freshwater fish native to Northern South America and the Caribbean.
    • It is widely recognized for its vibrant colors and adaptability, making it a popular choice for both aquarium enthusiasts and mosquito control programs worldwide.
    • It is a highly adaptable species, capable of surviving in a variety of freshwater environments.
    • Guppies are omnivorous, feeding on mosquito larvae, small insects, algae, and organic detritus.
    • Their feeding habits make them a common choice for mosquito control programs, although their effectiveness is still debated.
    • While guppies are less aggressive than mosquitofish, their population growth can still disrupt local ecosystems.

    PYQ:

    [2023] ‘Wolbachia method’ is sometimes talked about with reference to which one of the following?

    (a) Controlling the viral diseases spread by mosquitoes
    (b) Converting crop residues into packing material
    (c) Producing biodegradable plastics
    (d) Producing biochar from thermo-chemical conversion of biomass

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  • Wildlife Conservation Efforts

    Species in news: Indian Bison (Gaur)

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Indian Bison (Gaur)

    Why in the News?

    The Jharkhand Forest department has initiated a study to revive the dwindling population of Bison, popularly known as Gaur, at Palamu Tiger Reserve (PTR).

    bison

    About Indian Bison (Gaur)

    Details
    • Largest and tallest species in the wild cattle family.
    • Scientific Name: Bos gaurus.
    • Indigenous to South and Southeast Asia.
    Species Habitat and Location
    • Found in evergreen, semi-evergreen, and moist deciduous forests with open grasslands.
    • Prefers hilly terrains below 1,500–1,800 m with abundant water.
    • Distributed across India, Nepal, Bhutan, Myanmar, and Thailand.
    Behavioural Features
    • Social animals living in herds of 30–40 individuals.
    • Strong and sturdy limbs, short tails, and inward-curved pale green/yellowish-brown horns.
    • Males weigh 600–1,500 kg; females weigh 400–1,000 kg.
    • Convex-shaped forehead; height ranges from 170–230 cm.
    Conservation Status
    • IUCN Red List: Vulnerable.
    • Wildlife Protection Act, 1972: Schedule I.
    • CITES: Appendix I.

     

    PYQ:

    [2011] A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal?

    (a) Indian wild buffalo

    (b) Indian wild ass

    (c) Indian wild boar

    (d) Indian gazelle.

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  • New Species of Plants and Animals Discovered

    Migratory Bats ‘surf’ storm front winds to save energy

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Common Noctule Bats (Nyctalus noctula)

    Migratory Bats ‘surf’ storm front winds to save energy

    Why in the News?

    The Common Noctule Bats are surf over the storm winds when they migrate thousands of miles across continents, reveals new research.

    About the Common Noctule Bats (Nyctalus noctula)

    • The common noctule bat (Nyctalus noctula) is one of the largest bat species in Europe.
    • It has a body length of 7–9 cm, a wingspan of 32–40 cm, and weighs between 18–40 grams.
    • Its fur is reddish-brown to golden-brown, darker on the back and lighter underneath, while its wings are long and narrow, designed for fast and sustained flight.
    • Features: 
      • Common noctules are known for their swift and high-altitude flight, reaching heights of up to 3,000 meters.
      • They are primarily insectivorous, feeding on moths, beetles, and other flying insects.
      • Their echolocation abilities allow them to detect and hunt prey with precision, even in complete darkness.
      • Although classified as Least Concern by the IUCN, common noctule bats face several threats, including habitat loss due to deforestation and urbanization.
    • Habitat:
      • The common noctule bat is widely distributed across Europe, North Africa, and Asia, extending into Siberia and parts of China.
      • It is migratory, especially in central and eastern Europe, traveling long distances between summer breeding sites and winter hibernation sites.
      • It inhabits forests and woodlands, where it uses hollow trees for roosting, as well as urban areas, where it often roosts in buildings, attics, and bat boxes.
      • These bats also thrive in wetlands and grasslands, hunting over water bodies and open fields where insect populations are abundant.

    PYQ:

    [2012] Consider the following kinds of organisms:

    1. Bat

    2. Bee

    3. Bird

    Which of the above is/are pollinating agent/agents?

    (a) 1 and 2 only

    (b) 2 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

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  • New Species of Plants and Animals Discovered

    How are Zebrafishes able to repair damaged hearts?

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Zebrafish

    Why in the News?

    A recent research revealed that the Zebrafish (a popular aquarium fish) can regenerate damaged heart muscle within 60 days, a capability absent in humans. The Hmga1 protein plays a key role in this process, offering potential insights for heart repair in mammals.

    Discovery of Hmga1’s Role in Zebrafish Heart Regeneration:

    • In zebrafish, the Hmga1 protein plays a pivotal role in activating dormant genes necessary for regeneration.
    • It removes molecular “roadblocks” on chromatin (DNA-packaging structures), shifting genes from an inactive state to active regeneration mode.
    • The Hmga1 gene, active during embryonic development in mice and humans, becomes inactive after birth.
    • In zebrafish, however, the gene remains active during heart regeneration, enabling the repair process.

    About Zebrafish

    • Zebrafish are small freshwater fish measuring 2-3 cm in length.
    • It is named for the horizontal blue stripes running along their bodies.
    • It is native to South Asia’s Indo-Gangetic plains and is commonly found in paddy fields, stagnant water, and streams.
    • It is classified as Least Concern by the IUCN.

    Features of Zebrafish

    • Zebrafishes are known for their ability to regenerate almost all major organs, including the heart, brain, eyes, and spinal cord.
    • This unique trait makes them an important model in developmental biology and disease research.
    • They share approximately 70% of their genes with humans.
    • Over 80% of human disease-related genes have counterparts in zebrafish, making them valuable for studying genetic disorders.
    • They produce hundreds of embryos in a single clutch, enabling large-scale studies.
    • They are now preferred over rodent (guinea pigs) models for certain vertebrate development studies.
    • Widely used for regenerative biology and drug discovery due to their cost-effectiveness and rapid breeding.

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  • Wildlife Conservation Efforts

    African Wild Cat (Leptailurus serval)

    Species | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: African Wild Cat (Leptailurus serval)

    African Wild Cat (Leptailurus serval)

    Why in the News?

    The Border Security Force (BSF) has rescued a Serval, the African wild cat (Leptailurus serval) from an alleged wildlife smuggling attempt along the India-Bangladesh border.

    About African Wild Cat (Leptailurus serval):

    Details
    About
    • Scientific Name: Leptailurus serval
    • Common Name: African Wild Cat, Serval
    • Family: Felidae
    • Physical Description: Medium-sized wild cat with a slim, long-legged body, tawny coat with black spots and stripes, and large rounded ears. Can leap 3 meters (10 feet) vertically.
    Habitat and Features
    • Found across Sub-Saharan Africa.
    • Preferred Habitats: Savannahs, grasslands, and wetlands; avoids arid regions and dense forests.
    • Diet: Carnivorous, feeding on small mammals, birds, reptiles, and insects. Uses acute hearing to hunt.
    • Behavior: Solitary, nocturnal or crepuscular, and communicates through vocalizations and scent-marking.
    • Reproduction: Breeds year-round, with 2–3 kittens per litter; gestation period is 74 days.
    Conservation Status
    • IUCN Red List: Listed as Least Concern.
    • CITES: Included in Appendix II to regulate trade.

    Threats: Habitat loss, illegal hunting for fur, and conflicts with humans (e.g., poultry attacks).

     

    PYQ:

    [2015] With reference to the International Union for Conservation of Nature and Natural Resources (IUCN) and the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), which of the following statements is/are correct?

    1. IUCN is an organ of the United Nations and CITES is an international agreement between governments.
    2. IUCN runs thousands of field projects around the world to better manage natural environments.
    3. CITES is legally binding on the States that have joined it, but this Convention does not take the place of national laws.

    Select the correct answer using the code given below:

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

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