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Subject: Environment

  • Places in news: Pilibhit Tiger Reserve

    A herd of around 25 elephants from Nepal’s Shuklaphanta National Park reached the tiger reserve in Uttar Pradesh almost a month back.

    Pilibhit Tiger Reserve

    • Pilibhit Tiger Reserve is located in Pilibhit district of Uttar Pradesh and was notified as a tiger reserve in 2014.
    • It is one of the few well-forested districts in Uttar Pradesh.
    • It forms part of the Terai Arc Landscape in the upper Gangetic Plain along the India-Nepal border.
    • The habitat is characterized by sal forests, tall grasslands and swamp maintained by periodic flooding from rivers.
    • The Sharda Sagar Dam extending up to a length of 22 km is on the boundary of the reserve.
    • The tiger reserve got the first international award TX2 for doubling the tiger population in a stipulated time.

    Try answering this PYQ:

    Q.Consider the following protected areas:

    1. Bandipur
    2. Bhitarkanika
    3. Manas
    4. Sunderbans

    Which of the above are declared Tiger Reserves?

    (a) 1 and 2 only

    (b) 1, 3 and 4 only

    (c) 2, 3 and 4 only

    (d) 1, 2, 3 and 4

     

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  • Thawing Permafrost

    The latest IPCC report has warned that increasing global warming will result in reductions in Arctic permafrost and the thawing of the ground is expected to release greenhouse gases like methane and carbon dioxide.

    What is Permafrost?

    • ‘Permafrost’ or permanently frozen ground is land that has been frozen at or below 0 degrees Celsius for two or more consecutive years.
    • A staggering 17 per cent of Earth’s entire exposed land surface is comprised of permafrost.
    • Composed of rock, sediments, dead plant and animal matter, soil, and varying degrees of ice, permafrost is mainly found near the poles, covering parts of Greenland, Alaska, Northern Canada, Siberia and Scandinavia.
    • The Arctic region is a vast ocean, covered by thick ice on the surface (called sea ice), surrounded by land masses that are also covered with snow and ice.

    Permafrost thawing

    • When permafrost thaws, water from the melted ice makes its way to the caves along with ground sediments, and deposits on the rocks.
    • In other words, when permafrost thaws, the rocks grow and when permafrost is stable and frozen, they do not grow.

    Why thawing?

    • The link between the Siberian permafrost and Arctic sea ice can be explained by two factors:
    • One is heat transport from the open Arctic Ocean into Siberia, making the Siberian climate warmer.
    • The second is moisture transport from open seawater into Siberia, leading to thicker snow cover that insulates the ground from cold winter air, contributing to its warming.
    • This is drastically different from the situation just a couple of decades ago when the sea ice acted as a protective layer, maintaining cold temperatures in the region and shielding the permafrost from the moisture from the ocean.
    • If sea ice (in the summer) is gone, permafrost start thawing.

    Impact on Climate Change

    • Due to relentlessly rising temperatures in the region, since the late-twentieth century, the Arctic sea ice and surrounding land ice are melting at accelerating rates.
    • When permafrost thaws due to rising temperatures, the microbes in the soil decompose the dead organic matter (plants and animals) to produce methane (CH4) and carbon dioxide (CO2), both potent greenhouse gases.
    • CH4 is at least 80 times more powerful than CO2 on a decadal timescale and around 25 times more powerful on a century timescale.
    • The greenhouse gases produced from thawing permafrost will further increase temperatures which will, in turn, lead to more permafrost thawing, forming an unstoppable and irreversible self-reinforcing feedback loop.
    • Experts believe this process may have already begun. Giant craters and ponds of water (called ‘thermokarst lakes’) formed due to thawing have been recorded in the Arctic region. Some are so big that they can be seen from space.

    Why a matter of concern?

    • An estimated 1,700 billion tonnes — twice the amount currently present in the atmosphere — of carbon is locked in all of the world’s permafrost.
    • Even if half of that were to be released to the atmosphere, it would be game over for the climate.
    • Scientific estimates suggest that the Arctic Ocean could be largely sea ice-free in the summer months by as early as 2030, based on observational trends, or as late as 2050, based on climate model projections.

    Potential to cause another pandemic

    Ans. Permafrost has many secrets.

    • When the permafrost was formed thousands of years ago, there weren’t many humans who lived in that region which was necessarily very cold.
    • Researchers recently found mammoths in the permafrost in Russia.
    • And some of these mammoth carcasses when they begin to degrade again may reveal bacteria that were frozen thousands of years ago.
    • So there will be surprises. But whether they will be lethal surprises is just not possible to say.

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  • Climate Action and Finance Mobilization Dialogue (CAFMD)

    India and the US has together launched the “Climate Action and Finance Mobilization Dialogue (CAFMD)”.

    What is CAFMD?

    • The CAFMD is one of the two tracks of the India-U.S. Climate and Clean Energy Agenda 2030 partnership launched at the Leaders’ Summit on Climate in April 2021, by PM Modi and US President Mr. Biden.
    • The dialogue will strengthen India-US bilateral cooperation on climate and environment.
    • It will also help to demonstrate how the world can align swift climate action with inclusive and resilient economic development, taking into account national circumstances and sustainable development priorities.

    Key agendas

    • The US will collaborate with India to work towards installing 450 GW of renewable energy by 2030.
    • Currently, India’s installed power capacity is projected to be 476 GW by 2021-22 and is expected to rise to at least 817 GW by 2030.

    CAFMD would have three pillars:

    1. Climate Action Pillar: which would have joint proposals looking at ways in emissions could be reduced in the next decade.
    2. Setting out a Roadmap: to achieving the 450GW in transportation, buildings and industry.
    3. Finance Pillar: would involve collaborating on attracting finance to deploy 450 GW of renewable energy and demonstrate at scale clean energy technologies.

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  • First Dugong Conservation Reserve to be built in India

    India’s first Dugong conservation reserve will be built in Tamil Nadu for the conservation of Dugong, a marine mammal.

    Try answering this PYQ:

    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 I of the Wildlife (Protection) Act, 1974.

    Select the correct answer using the code given below:

    (a) 1 and 2 only

    (b) 2 only

    (c) 1 and 3 only

    (d) 3 only

     

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    Dugong Conservation Reserve

    • The reserve will spread over an area of 500 km in Palk Bay on the southeast coast of Tamil Nadu.
    • Palk Bay is a semi-enclosed shallow water body with a water depth maximum of 13 meters.
    • Located between India and Sri Lanka along the Tamil Nadu coast, the dugong is a flagship species in the region.

    Dugong: The sea cow

    • Dugong or the sea cow is the State animal of Andaman & Nicobar Islands.
    • This endangered marine species survive on seagrass and other aquatic vegetation found in the area.
    • It is the only herbivorous mammal that is strictly marine and is the only extant species in the family Dugongidae.
    • Dugongs are usually about three-meter long and weigh about 400 kg.
    • Dugongs have an expanded head and trunk-like upper lip.
    • Elephants are considered to be their closest relatives. However, unlike dolphins and other cetaceans, sea cows have two nostrils and no dorsal fin.

    Their habitat

    • Distributed in shallow tropical waters in the Indo-Pacific region, in India, they are found in the Gulf of Kutch, Gulf of Mannar, Palk Bay, and Andaman & Nicobar Islands.
    • Dugongs are long-living animals, that have a low reproductive rate, long generation time, and high investment in each offspring.
    • The female dugongs do not bear their first calf until they are at least 10 and up to 17 years old.
    • A dugong population is unlikely to increase more than 5% per year. They take a long time to recover due to the slow breeding rate.

    Causes of extinction

    • Having being declared vulnerable, the marine animal calls for conserving efforts.
    • Studies have suggested the reasons for the extinction of the animal such as slow breeding rate, fishing, and the loss of habitat.
    • They are also known to suffer due to accidental entanglement and drowning in gill-nets.

    Conservation in India

    • The conservation reserve can promote growth and save vulnerable species from the verge of extinction.
    • Dugongs are protected in India under Schedule 1 of the Indian Wildlife Act 1972 which bans the killing and purchasing of dugong meat.
    • IUCN status: Vulnerable

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  • Universal Declaration of the Rights of Rivers

    Activists have highlighted the plight of rivers as well as the support building up for according rights to them under the Universal Declaration of the Rights of Rivers.

    What constitutes the Rights of Rivers?

    • Flow: If we look at a river as an ecosystem instead of cubic metres of water, then the ambit of rights gets broadened.
    • Flora and fauna: It includes aquatic flora and fauna, the biodiversity in its catchment areas, forests, its tributaries, groundwater, the rocks and soil in its bed and banks.
    • Human settlements: The rights of rivers in a sense would mean the ecological causes and conditions making up the natural habitat. Human settlements dependent is the prime factor.
    • Economy: Such rights should not put an end to fishing or other localized, subsistence-based human needs related to the river, but rather push for a healthy relationship respecting the river as an ecosystem.

    Universal Declaration of the Rights of Rivers

    • The declaration is a civil society initiative to define the basic rights to which all rivers are entitled, according to a note by non-profit, International Rivers.
    • This trend of granting rights to nature, taking place across the world, signals the beginnings of a radical shift from an extractive mindset to one where conservation safeguards are being extended to nature.
    • The right to recognize rivers as living entities rather than mere human property started in 2008.
    • That year, Ecuador became the first country to constitutionally recognize the Rights of Nature.

    Present campaigns

    • In the one year since the declaration, rights have been recognised or declared for the Boulder Creek watershed in the US, the Magpie River in Canada, the Alpayacu river in Ecuador and the Paraná river and its wetlands in Argentina.
    • Several campaigns calling for rights to be accorded to rivers have also incorporated the declaration.
    • These include campaigns for the Lempa river in El Salvador, Tavignanu river in France, Ethiope river in Nigeria, the Indus river in Pakistan and the Frome river in the UK.
    • In 2017, a treaty agreement between the Whanganui Iwi (a Māori tribe) and the New Zealand government recognized the Whanganui River as a legal person.

    Recognition of such rights in India

    • In 2017, the Uttarakhand HC ruled that the Indian rivers Ganga and Yamuna, the Gangotri and Yamunotri glaciers, as well as other related natural elements are “legal persons” with all corresponding rights, duties, and liabilities of a living person.
    • Subsequently, in 2018, the same high court ruled that the entire animal kingdom has rights equivalent to that of a living person.

    Challenges

    • Cultural practices: Activists and communities have been arguing for a need of cultural change that can bring about the ethic of care with regard to the rest of nature. Indigenous people have had such an ethic in their worldviews and ways of living.
    • Development paradigm: The most critical challenge is whether can rights be protected without changing the current development paradigm. Any paradigm shift also needs questioning of fundamental forms of injustices, including capitalism, statism, anthropocentrism, and patriarchy.
    • Cross-boundary issues: Rivers don’t necessarily follow human-made political boundaries. Indus, one of the longest that runs through China, Pakistan, and India, doesn’t flow as per political boundaries. Its contiguity demands a cross-boundary approach.
    • Cooperation deficit: There is still very limited understanding across the world on how a law on the rights of rivers can be implemented. What would be the best ways to ensure custodianship, restitution, compensation.

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  • Places in news: Qeqertaq Avannarleq Island

    A group of researchers who went out to collect samples off the coast of Greenland in July found themselves on a tiny, uninhabited and previously unknown island.

    Qeqertaq Avannarleq

    • Measuring 60×30 metres and with a peak of three metres above sea level, it has now become the new northernmost piece of land on Earth.
    • Before this, Oodaaq was marked as the Earth’s northernmost terrain.
    • The new island is made up of seabed mud and moraine, i.e. soil, rock and other material left behind by moving glaciers, and has no vegetation.
    • The group has suggested the discovery be named ‘Qeqertaq Avannarleq’, which is Greenlandic for “the northernmost island”.

    How this island came to existence?

    Ans. Undoubtedly, climate change in Greenland

    • Global warming has had a severe effect on the ice sheet of Greenland.
    • The new island, which was exposed by shifting pack ice, is, however, not a direct consequence of climate change.

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  • Places in news: Gulf of Mexico

    An oil spill spanning at least 10 miles has been captured by satellite imagery in waters off the Louisiana coast near the Gulf of Mexico.

    Gulf of Mexico

    • The Gulf of Mexico is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent.
    • It is bounded on the northeast, north and northwest by the Gulf Coast of the United States; on the southwest and south by the Mexican states of Tamaulipas, Veracruz, Tabasco, Campeche, Yucatan, and Quintana Roo; and on the southeast by Cuba.
    • The US states of Texas, Louisiana, Mississippi, Alabama, and Florida, which border the Gulf on the north, are often referred to as the “Third Coast” of the United States (in addition to its Atlantic and Pacific coasts).
    • It is covered with a tangle of pipes, wells and other energy infrastructure, much of it no longer used, as a result of generations of oil extraction there.

    Its formation

    • The Gulf of Mexico took shape approximately 300 million years ago as a result of plate tectonics.
    • Its floor consists of sedimentary rocks and recent sediments.
    • It is connected to the part of the Atlantic Ocean through the Florida Straits between the US and Cuba, and with the Caribbean Sea via the Yucatán Channel between Mexico and Cuba.
    • Because of its narrow connection to the Atlantic Ocean, the Gulf experiences very small tidal ranges.

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  • Dinosaur Footprints found in Thar desert

    In a major discovery, footprints of three species of dinosaurs have been found in the Thar desert in Rajasthan’s Jaisalmer district.

    Details of the footprints

    • The footprints, made in the sediment or silt of the seashore, later become permanently stone-like.
    • They belong to three species of dinosaurs — Eubrontes cf. giganteus, Eubrontes glenrosensis and Grallator tenuis.
    • While the giganteus and glenrosensis species have 35 cm footprints, the footprint of the third species was found to be 5.5 cm.
    • The dinosaur species are considered to be of the theropod type, with the distinguishing features of hollow bones and feet with three digits.
    • All three species, belonging to the early Jurassic period, were carnivorous.
    • Eubrontes could have been 12 to 15 metres long and weighed between 500 kg and 700 kg, while the height of the Grallator is estimated to have been two metres, as much as a human, with a length of up to three metres.

    Key findings

    • The discovery of dinosaur footprints prove the presence of the giant reptiles in the western part of the State, which formed the seashore to the Tethys Ocean during the Mesozoic era.
    • Careful geological observations enabled the scientists to interpret ancient environments in which the rocks of the footprints, which were once soft sediments, were deposited.
    • Geochemical analyses and calculation of weathering indices showed that the hinterland climate was seasonal to semi-arid during the deposition of the footprints.
    • Fieldwork in the Kutch and Jaisalmer basins has suggested that after the main transgression during the early Jurassic period, the sea level changed several times.
    • Spatial and temporal distribution of sediments and traces of fossils and post-depositional structures provided an indication to this phenomenon.

    Significance

    • These trace fossils are significant to ascertain how life started and evolved after the mass extinction of species, including dinosaurs, at the end of the cretaceous period around 65 million years ago.
    • This research also illustrates the evidence of a fluvial freshwater palaeo-environment and tropical palaeo-climate, indicating the presence of a tropical forest and a huge network of rivers.

    No matter what, try this PYQ:

    Q.The term “sixth mass extinction/sixth extinction” is often mentioned in the news in the context of the discussion of (CSP 2018):

    (a) Widespread monoculture Practices agriculture and large-scale commercial farming with indiscriminate use of chemicals in many parts of the world that may result in the loss of good native ecosystems.

    (b) Fears of a possible collision of a meteorite with the Earth in the near future in the manner it happened 65million years ago that caused the mass extinction of many species including those of dinosaurs.

    (c) Large scale cultivation of genetically modified crops in many parts of the world and promoting their cultivation in other Parts of the world which may cause the disappearance of good native crop plants and the loss of food biodiversity.

    (d) Mankind’s over-exploitation/misuse of natural resources, fragmentation/loss, natural habitats, destruction of ecosystems, pollution, and global climate change.

     

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  • Hydel projects in Ganga-Himalayan basin

    Context

    The affidavit filed recently by the Ministry of Environment, Forest and Climate Change (MoEFCC) in an ongoing matter in the Supreme Court of India has recommended the construction of seven partially constructed hydroelectric projects in the Uttarakhand Himalaya.

    Background

    • After the Kedarnath tragedy of 2013, an expert body (EB-I) was constituted to investigate whether the hydro-power projects in the State of Uttarakhand was linked to the disaster.
    •  In its findings, EB-I said there was a “direct and indirect impact” of these dams in aggravating the disaster.
    • The Ministry formed another expert body (EB-II; B.P. Das committee) whose mandate has been to pave the way for all projects through some design change modifications
    • This affidavit, dated August 17, reveals that the government is inclined towards construction of 26 other projects, as in the recommendation of the expert body (EB-II; B.P. Das committee). 
    • Ministry’s own observations and admissions given in its earlier affidavit dated May 5, 2014 admitted that hydroelectric projects did aggravate the 2013 flood.

    Concerns

    • Sustainability: The sustainability of the dams in the long term is highly questionable as hydropower solely relies on the excess availability of water.
    • Temperatures across the region are projected to rise by about 1°C to 2°C on average by 2050.
    • Retreating glaciers and the alternating phases of floods and drought will impact the seasonal flows of rivers.
    • Sediment hotspots: The most crucial aspect is the existence of sediment hotspot paraglacial zones, which at the time of a cloud burst, contribute huge amounts of debris and silt in the river.
    • The flash floods in these Himalayan valleys do not carry water alone; they also carry a massive quantity of debris.
    • This was pointed out by EB-II alongside its recommendation not build any projects beyond 2,000 metres or north of the MCT, or the Main Central Thrust (it is a major geological fault).
    • Externalities:  Though hydropower is renewable source, there are contentious externalities associated with the construction of dams such as social displacement, ecological impacts, environmental and technological risks.
    • Climate change: these projects exacerbate ecological vulnerability, in a region that is already in a precarious state.
    • The intense anthropogenic activities associated with the proliferation of hydroelectric projects in these precarious regions accelerate the intensity of flash floods, avalanches, and landslides.
    • Failure of mountain slopes: The construction and maintenance of an extensive network of underground tunnels carrying water to the powerhouses contribute to the failure of mountain slopes.
    • Aggravating the disaster: The Rishi Ganga tragedy and the disasters of 2012 (flashfloods), 2013 are examples of how hydroelectric projects which come in the way of high-velocity flows aggravate a disaster and should be treated as a warning against such projects.

    Conclusion

    Considering the environmental and cultural significance of these areas, it is imperative that the Government refrains from the construction of hydroelectric projects and declares the upper reaches of all the headstreams of the Ganga as eco-sensitive zones. It must allow the river to flow unfettered and free.

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    Back2Basics: Main Central Thrust (MCT)

    • The Main Central Thrust is a major geological fault where the Indian Plate has pushed under the Eurasian Plate along the Himalaya.
    • The fault slopes down to the north and is exposed on the surface in a NW-SE direction (strike).
    • It is a thrust fault that continues along 2200 km of the Himalaya mountain belt

  • Behler Turtle Conservation Award

    Indian biologist Shailendra Singh has been awarded the Behler Turtle Conservation Award for bringing three critically endangered turtle conservation species back from the brink of extinction.

    Behler Turtle Conservation Award

    • The Award is a major annual international award honoring excellence in the field of tortoise and freshwater turtle conservation and biology, and leadership in the chelonian conservation and biology community.
    • It is co-presented by the Turtle Survival Alliance (TSA), the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group (TFTSG) among others.
    • It is widely considered the “Nobel Prize” of turtle conservation and biology.

    Citation for the 2021 Award

    • For some species, such as the Red-crowned Roofed Turtle (Batagur kachuga), Northern River Terrapin (Batagur Baska), and Black Softshell Turtle (Nilssonia nigricans) Dr. Singh and his team’s efforts are the last hope for their wild survival in the country.
    • In just 15 years, there are few individuals that have made such monumental contributions to turtle conservation.

    Turtles in India

    • The Northern River Terrapin (Batagur Baska) is being conserved at the Sunderbans; the Red-crowned Roofed Turtle (Batagur kachuga) at Chambal; and the Black Softshell Turtle (Nilssonia nigricans) at different temples in Assam.
    • These critically endangered turtles are being conserved as a part of TSA India’s research, conservation breeding and education programme in different parts of the country.
    • There are 29 species of freshwater turtles and tortoises in the country.

    About Turtle Survival Alliance (TSA)

    • The TSA was formed in 2001 as an International Union for Conservation of Nature (IUCN) partnership for sustainable captive management of freshwater turtles and tortoises.
    • This alliance arose in response to the rampant and unsustainable harvest of Asian turtle populations to supply Chinese markets, a situation known as the Asian Turtle Crisis.

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