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GS Paper: GS3-18.Conservation, Environmental Pollution and Degradation, Environmental Impact Assessment.

  • Specie in news: Charru mussel (Mytella strigata)

    An invasive mussel native to the South and Central American coasts is spreading quickly in the backwaters of Kerala.

    Try this PYQ from CSP 2018:

    Q. Why is a plant called Prosopis juliflora often mentioned in news?

    (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 pesticides.

    (d) None of the above

    Charru mussel

    • The rapid spread of the Charru mussel (Mytella strigata) may have been triggered by Cyclone Ockhi which struck the region in 2017.
    • With a population as high as 11,384 per sq metre here, it has replaced the Asian green mussel (Perna Viridis) and the edible oyster Magallana bilineata (known locally as muringa).
    • Externally, the Charru mussel resembles the green and brown mussels (kallummekka in Malayalam) but is much smaller in size. Its colour varies from black to brown, purple or dark green.
    • Surveys show the presence of the Charru mussel in the Kadinamkulam, Paravur, Edava-Nadayara, Ashtamudi, Kayamkulam, Vembanad, Chettuva and Ponnani estuaries/backwaters.
    • Ashtamudi Lake, a Ramsar site in Kollam district, remains the worst-hit.

    Threats posed

    • Though this smaller mussel is edible, the overall economic loss and impact on biodiversity are much bigger, it is pointed out.
    • It is throwing out other mussel and clam species and threatening the livelihoods of fishermen engaged in shrimp fisheries.

  • Species in news: Dugong

    The dugong, commonly known as the sea cow, is fighting for its survival in Indian waters experts have said on the eve of ‘World Dugong Day’ on May 28, 2020.

    Try this question from CSP 2015:

    Q) With reference to ‘dugong’, a mammal found in India, which of the following statements is/are correct?

    1) It is a herbivorous marine animal.

    2) It is found along the entire coast of India

    3) It is given legal protection under Schedule 1 of the Wildlife (Protection) Act, 1972.

    Select the correct answer using the code given below.
    (a) 1 and 2
    (b) 2 only
    (c) 1 and 3
    (d) 3 only

    Dugong

    • Dugongs are mammals, which means they give birth to live young and then produce milk and nurse them.
    • It is the flagship animal of Gulf of Mannar Marine National Park.
    • Once the female is pregnant, she will carry the unborn baby, called a foetus for 12-14 months before giving birth.
    • Female dugongs give birth underwater to a single calf at three to seven-year intervals.
    • Dugongs graze on seagrass, especially young shoots and roots in shallow coastal waters. They can consume up to 40 kilograms of seagrass in a day.
    • Dugongs are an IUCN Endangered marine species like sea turtles, seahorses, sea cucumbers and others.
    • They are protected in India under Schedule I of the Wild (Life) Protection Act, 1972.

    Threats to dugongs

    • Human activities such as the destruction and modification of habitat, pollution, rampant illegal fishing activities, vessel strikes, unsustainable hunting or poaching and unplanned tourism are the main threats to dugongs.
    • The loss of seagrass beds due to ocean floor trawling was the most important factor behind dwindling dugong populations in many parts of the world.

    Why needs urgent attention?

    • There were just 250 dugongs in the Gulf of Mannar in Tamil Nadu, the Andaman and Nicobar Islands and the Gulf of Kutch in Gujarat according to the 2013 survey report of the Zoological Survey of India (ZSI).
    • Hundreds of dugongs inhabited waters off the Odisha, West Bengal and Andhra Pradesh coasts two centuries back. But they are extinct in these areas now, he added.
    • Seagrass in Odisha’s Chilika Lake is a proper habitat for dugongs. However, there is not an extant population in Chilika.

    Other facts:

    • The 13th CoP of the Convention on the Conservation of Migratory Species of Wild Animals (CMS), an environmental treaty under the aegis of the UNEP, was hosted by India this year at Gandhinagar in Gujarat.
    • India is a signatory to the CMS since 1983.
    • India has signed non-legally binding Memorandums of Understanding with CMS on the conservation and management of Siberian Cranes (1998), Marine Turtles (2007), Dugongs (2008) and Raptors (2016).
    • Proper conservation is the only way to save dugongs from extinction. Conservation in other places like Australia has seen their population crossing 85,000.

  • Species in news: Cicadas

    A brood of periodical cicadas, noisy insects that breed underground for as long as 13-17 years are expected to emerge into some states of the US this year.

    A stand-alone species being mentioned in the news for the first time may find their way into the prelims. Make special note here.

    What are Cicadas?

    • Cicadas are insects that spend most of their lives underground and emerge from the soil mainly to mate.
    • Once out of the ground, their life span is fairly short, somewhere between two-four weeks.
    • At present, there are about 15 active broods of these cicadas as some have gone extinct.
    • The insects are found in America’s as well as New Zealand and Australia.
    • The name 13 and 17 year refers to the number of years that cicada nymphs take to reach adulthood.
    • It is not clear why their development period is so long, researchers suspect that it may be linked to avoiding predators above the soil.

    How are the fed?

    • During this time underground the nymphs feed on sap from plant roots.
    • After this developmental period, the cicada nymphs construct a “cicada hut” and burrow their way out from the soil and climb onto any nearby tree or vegetation.

  • Species in news: Puntius Sanctus fish

    Velankanni in Tamil Nadu has thrown up a new species of small freshwater fish.

    Last year one species from our newscard: Species in news: Hump-backed Mahseer made it into the CSP 2019.  The ‘Puntius Sanctus’ fish in the newscard creates such a vibe yet again.

    A stand-alone species being mentioned in the news for the first time (and that too from Southern India) find their way into the prelims. Make special note here.

    Q. Consider the following pairs

    Wildlife Naturally found in
    1. Blue-finned Mahseer Cauvery River
    2. Irrawaddy Dolphin Chambal River
    3. Rusty-spotted Cat Eastern Ghats

    Which of the pairs given correctly matched? (CSP 2019)

    (a) 1 and 2 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

    Puntius Sanctus

    • The silver-hued fish has been named Puntius Sanctus — ‘Sanctus’ is Latin for holy — after the popular pilgrim town.
    • Encountered in a small waterbody in Venlankanni, Puntius Sanctus is small, it grows to a length of 7 cm.
    • It found to use both as food and as an aquarium draw.
    • “The Puntius species are known locally as ‘Paral’ in Kerala and ‘Kende’ in Tamil Nadu.

  • [pib] L7 Quadricycle category for BS VI

    The Ministry of Road Transport and Highways has issued a notification regarding the emission norms for L7 (Quadricycle) category for BS-VI.

    Practice question for Mains:

    Q. What are Bharat Stage Emission Standards (BSES)? Discuss how the early implementation of BS-VI norms will help curb vehicular pollution in India.

    What is Quadricycle Vehicle verification?

    • The quadricycle is a European Union vehicle category for four-wheeled microcars, which allows these vehicles to be designed to less stringent requirements when compared to regular cars.
    • Quadricycles are defined by limitations in terms of weight, engine power and speed.
    • There are two categories of quadricycles: light quadricycles (L6e) and heavy quadricycles (L7e)

    What are the new notified norms?

    • These norms are applicable from the date of notification.
    • This notification completes the process of BS-VI for all L, M and N category vehicles in India.
    • The emission norms are in line with EU with WMTC cycle.
    • The procedure for testing is laid down in Automotive Industry Standard (AIS) 137-Part 9.

    What is the WMTC cycle?

    • The World Motorcycle Test Cycle (WMTC) is a system of driving cycles used to measure fuel consumption and emissions in motorcycles.
    • The methods are stipulated as part of the Global Technical Regulation established under the UN World Forum for Harmonization of Vehicle Regulations, also known as WP.29.

    Back2Basics:  Bharat Stage Norms

    Standard Reference Date of Implementation
    Bharat Stage II Euro 2 1 April 2005
    Bharat Stage III Euro 3 1 April 2010
    Bharat Stage IV Euro 4 1 April 2017
    Bharat Stage VI Euro 6 April 2020 with a mandate (proposed)

    Minutes of BS-VI

    • Carmakers would have to put three pieces of equipment — a DPF (diesel particulate filter), an SCR (selective catalytic reduction) system, and an LNT (Lean NOx trap) — to meet stringent BS-VI norms, all at the same time.
    • This is vital to curb both PM (particulate matter) and NOx (nitrogen oxides) emissions as mandated under the BS-VI norms.

    How is BS-VI Different from BS-IV?

    • The major difference between the existing BS-IV and forthcoming BS-VI norms is the presence of sulphur in the fuel.
    • While the BS-IV fuels contain 50 parts per million (ppm) sulphur, the BS-VI grade fuel only has 10 ppm sulphur content.
    • Also, the harmful NOx (nitrogen oxides) from diesel cars can be brought down by nearly 70%.
    • In the petrol cars, they can be reduced by 25%.
    • However, when we talk about air pollution, particulate matter like PM 2.5 and PM 10 are the most harmful components and the BS-VI will bring the cancer-causing particulate matter in diesel cars by a phenomenal 80%.

  • [pib] Initiatives launched on International Day of Biodiversity

    In a virtual celebration of the International Day for Biological Diversity 2020, Union Minister of Environment, Forest and Climate Change (MoEFCC) has launched key initiatives towards conservation of biodiversity.

    Possible prelim question:

    The ‘Not all Animals Migrate by Choice’ campaign recently seen in news is an initiative by __________.

    About the International Day for Biological Diversity

    • This Day is a United Nations-sanctioned international day for the promotion of biodiversity issues.
    • It is currently held on May 22.
    • The year 2020 is also the “Super Year for Biodiversity”, as the Strategic Plan for Biodiversity with 20 global Aichi targets adopted in 2010 ends in 2020.

    1) Biodiversity Samrakshan Internship Programme

    • The program proposes to engage 20 students with postgraduate degrees for a period of one year through an open, transparent, online competitive process.
    • It has the National Biodiversity Authority (NBA) and the UN Development Programme (UNDP) as a nodal agency.

     2) ‘Not all Animals Migrate by Choice’ campaign

    • It is a United Nations Environment Programme (UNEP) Campaign launched by the Wildlife Crime Control Bureau on Illegal Trafficking of Endangered Species.
    • It aims to curb illegal trade in wildlife which carries the risk of spreading dangerous pandemics.

    Back2Basics: Aichi Targets

    • The ‘Aichi Targets’ were adopted by the Convention on Biological Diversity (CBD) at its Nagoya conference.
    • The short term plan provides a set of 20 ambitious yet achievable targets, collectively known as the Aichi Targets.
    • The IUCN Species Programme provides advice to Parties, other governments and partners on the implementation of the Strategic Plan for Biodiversity and it’s Aichi Biodiversity Targets (2011 – 2020) and is also heavily involved in work towards the Target.

  • Etalin Hydro Electric Project

    A group of conservationists has written to the Environment Ministry seeking rejection of the approved Etalin Hydro Electric Project in the Dibang Valley district of Arunachal Pradesh.

    Make a note of major dams in India along with the rivers, terrain, major Wildlife sanctuaries and national parks incident to these rivers.

    Etalin Hydro Electric Project

    • Etalin HEP is a 3097 MW project based on the river Dibang.
    • It is envisaged as a run of the river scheme on rivers Dri and Tangon in the Dibang Valley District of Arunachal Pradesh.
    • Dibang is a tributary of the Brahmaputra River which flows through the states of Arunachal Pradesh and Assam.
    • The project is being executed through the Etalin Hydro Electric Power Company Limited, a JV company of Jindal Power Limited and Hydro Power Development Corporation of Arunachal Pradesh Limited.
    • It is expected to be one of the biggest hydropower projects in India in terms of installed capacity.

    Issues with the Project

    • The Project falls under the richest bio-geographical province of the Himalayan zone and would be located at the junction of major biogeographic zones like Palaearctic Zone and Indo-Malayan Zone.
    • It would involve the clearing of 2.7 lakh trees in “subtropical evergreen broad-leaved forest and subtropical rain forests”.
    • Underscoring the inadequacy of the Environment Impact Assessment report on Etalin, the conservationists said observations by wildlife officials were ignored.
    • These include the threat to 25 globally endangered mammal and bird species in the area to be affected.

    Back2Basics: Biogeographic Zones

    • A biogeographic realm or ecozone is the broadest biogeographic division of Earth’s land surface, based on distributional patterns of terrestrial organisms.
    • These zones delineate the large areas of the Earth’s surface within which organisms have been evolving in relative isolation over long periods of time.
    • They are separated from one another by geographic features, such as oceans, broad deserts, or high mountain ranges that constitute barriers to migration.
    • Originally, six biogeographic regions were identified: Palearctic (Europe and Asia), Nearctic (North America), Neotropical (Mexico, Central and South America), Ethiopian/Afrotropic (Africa), Oriental/Indo-Malayan (Southeast Asia, Indonesia) and Australian (Australia and New Guinea).
    • Currently, eight are recognised since the addition of Oceania (Polynesia, Fiji and Micronesia) and Antarctica.

  • Species in news: Pinanga Andamanensis

    A rare palm endemic to the South Andaman Island is finding a second home at Thiruvananthapuram-based Jawaharlal Nehru Tropical Botanic Garden and Research Institute (JNTBGRI).

    Last year one  species from our newscard : Species in news: Hump-backed Mahseer made it into the CSP 2019.  The ‘Abutilon ranadei’ flower in the newscard creates such a vibe yet again.

    A stand-alone species being mentioned in the news for the first time often find their way into the prelims. Make a special note here.

    Pinanga Andamanensis

    • Pinanga andamanensis is an IUCN critically endangered species and one of the least known among the endemic palms of the Andaman Islands.
    • The name is derived from ‘Penang’, the modern-day Malaysian state.
    • Its entire population of some 600 specimens naturally occurs only in a tiny, evergreen forest pocket in South Andaman’s Mount Harriet National Park.
    • It was originally described by the Italian botanist Odoardo Beccari in 1934.
    • His description was based on an old herbarium specimen collected by E.H. Man, a late-19th century assistant superintendent in the Andaman administration.
    • After that first identification, it was thought to be extinct till 1992.

  • Species in news: 40 Gharials released into Ghaghara River in UP

    Forty gharials (Gavialis gangeticus) were released in the Ghaghara River by the Bahraich forest division of Uttar Pradesh.

    This year, we have seen many news focusing on species reintroduction into the wild. Can you recall them?? If not, Click Here.

    And one may often get confused between the Mugger, Gharial and the Saltwater Crocodile. Note the differences about their IUCN status, habitat (freshwater/saltwater) etc..

    Gharials

    • The Gharial is a fish-eating crocodile is native to the Indian subcontinent. They are a crucial indicator of clean river water.
    • Small released populations are present and increasing in the rivers of the National Chambal Sanctuary, Katarniaghat Wildlife Sanctuary, Son River Sanctuary.
    • It is also found at the rainforest biome of Mahanadi in Satkosia Gorge Sanctuary, Orissa.
    • Gharials are ‘Critically Endangered’ in the IUCN Red List of Species.
    • The species is also listed under Schedule I of the Wild Life (Protection) Act, 1972.

    Into the wild

    • A major chunk of gharials in India is found in the Chambal River, which has about 1,000 adults.
    • The Ghaghara acts as an important aquatic corridor for gharials in Uttar Pradesh. The river is a major left-bank tributary of the Ganges.
    • About 250 gharials have been released in the Ghaghara since 2014.
    • However, there are satellite populations of less than 100 adults in the Girwa River (Katarniaghat Wildlife Sanctuary in Uttar Pradesh, the Ramganga River in Jim Corbett National Park and the Son River).
    • Like Uttar Pradesh, Bihar too is releasing gharials in the Valmiki Tiger Reserve as part of restocking the wild population. Unlike crocodiles, gharials do not pose any danger to humans.

    Back2Basics

    Mugger

    • The mugger is a marsh crocodile which is found throughout the Indian subcontinent.
    • It is a freshwater species and found in lakes, rivers and marshes.
    • IUCN Status: Vulnerable

    Saltwater Crocodile

    • It is the largest of all living reptiles.
    • It is found along the eastern coast of India.
    • IUCN Status: Least Concerned

  • Global Forest Resources Assessment, 2020

    The deforestation rate globally declined between 2015 and 2020, according to the Global Forest Resources Assessment, 2020. This decline is a result of sustainable management measures worldwide.

    Possible prelim question:

    Q. The Global Forest Resources Assessment Report recently seen in news is published by-

    a) UN-FAO

    b) UN Forum on Forests

    c) International Union of Forest Research Organizations

    d) None of these

    Global Forest Resources Assessment

    • The Global Forest Resources Assessment (FRA) reports on the status and trends of the world’s forest resources.
    • It is led by the Forestry Department of the Food and Agriculture Organization of the United Nations.
    • The FRA reports the extent of the world’s forest area as well as other variables, including land tenure and access rights, sustainable forest management (SFM), legal and institutional frameworks for forest conservation, and sustainable use.

    Click here for amazing visuals of the FRA

    Highlights of the 2020 report

    • The rate of forest loss in 2015-2020 declined to an estimated 10 million hectares (mha), down from 12 million hectares (mha) in 2010-2015, according to the FRA 2020.
    • The FRA 2020 has examined the status of, and trends in, more than 60 forest-related variables in 236 countries and territories in the period 1990–2020.
    • The world lost 178 mha of forest since 1990, an area the size of Libya, according to the report.
    • However, the rate of net forest loss decreased substantially during 1990–2020 due to a reduction in deforestation in some countries, plus increases in the forest area in others through afforestation.
    • The largest proportion of the world’s forests were tropical (45 per cent), followed by boreal, temperate and subtropical.

    Data on losses and gains

    • The world’s total forest area was 4.06 billion hectares (bha), which was 31 per cent of the total land area. This area was equivalent to 0.52 ha per person.
    • Among the world’s regions, Africa had the largest annual rate of net forest loss in 2010–2020, at 3.9 mha, followed by South America, at 2.6 mha.
    • On the other hand, Asia had the highest net gain of forest area in 2010–2020, followed by Oceania and Europe.
    • However, both Europe and Asia recorded substantially lower rates of the net gain in 2010–2020 than in 2000–2010.
    • Oceania experienced net losses of forest area in the decades 1990–2000 and 2000–2010.
    • More than 54 per cent of the world’s forests were in only five countries — the Russian Federation, Brazil, Canada, the United States of America and China.
    • The highest per cent of plantation forests were in South America while the lowest was in Europe.