Note4Students
From UPSC perspective, the following things are important :
Prelims level: Madhavpur Mela
Mains level: Not Much
The Madhavpur Mela was recently inaugurated by the President of India.
In the entire country, there is no other fair which the President and host of Union Ministers and Chief Ministers of a number of states visit.
What is the Madhavpur Mela?
- The Mela is a religio-cultural fair taking place every year in Madhavpur, a village on the Porbandar coast, also known as Madhavpur Ghed.
- The village has temples of Madhavraiji, or Lord Krishna, and his consort Rukmini, believed to have been built in the 15th century.
- It is also known for its sandy sea beach, the turquoise waters of the Arabian Sea, a sea turtle hatchery and the Osho Ashram
- The fair begins on Ram Navami, Lord Rama’s birth anniversary falling on the ninth day of the month of Chaitra in the Hindu calendar, and culminates on Tryodashi, the 13th day of the month.
Mythology behind the fair
- The fair celebrates the marriage of Lord Krishna with Rukmini around 4,000 years ago, as per Hindu mythology.
- The fair begins on Ram Navami, Lord Rama’s birth anniversary falling on the ninth day of the month of Chaitra in the Hindu calendar, and culminates on Tryodashi, the 13th day of the month.
- According to mythology, Lord Krishna had established his kingdom in Dwarka near Porbandar.
- Rukmini, daughter of King Bhimak of the present-day Arunachal Pradesh, wanted to marry Krishna, while her brother wanted to marry her off to Shishupal, Krishna’s cousin.
- Therefore, Krishna abducted Rukmini, brought her to Gujarat and tied the knot with her at Madhavpur village.
- Today, to mark the wedding, marriage rituals go on for five days.
- They culminate with the idols of Lord Krishna and Rukmini being taken out in a procession through Madhavpur for ‘samaiya’, a ritual to welcome the bridegroom back home with his bride.
Significance of the fair
- The President observed that fairs and festivals have bonded the people of India for ages and that Madhavpur Mela also integrates Gujarat to the Northeast of India.
- This fair reflects that, despite our languages, dialects and lifestyles being different, Indians, since time immemorial, have been one culturally.
Do you know?
There is one such festival called ‘Pushkaram’ which is celebrated by the people of Tamil Nadu. Devotees from Tamil Nadu perform rituals at the banks of Brahmaputra River.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Megalithic Burials in India
Mains level: Not Much
The discovery of a number of megalithic stone jars in Assam’s Dima Hasao district has brought to focus possible links between India’s Northeast and Southeast Asia, dating back to the second millennium BC.
What is the news?
- According to a study in Asian Archaeology, the jars are a “unique archaeological phenomenon”.
- It calls for more research to understand the “likely cultural relationship” between Assam and Laos and Indonesia, the only two other sites where similar jars have been found.
About the Megalithic Jars
- The jars of Assam were first sighted in 1929 by British civil servants James Philip Mills and John Henry Hutton.
- They recorded their presence in six sites in Dima Hasao: Derebore (now Hojai Dobongling), Kobak, Kartong, Molongpa (now Melangpeuram), Ndunglo and Bolasan (now Nuchubunglo).
- More such sites were later discovered in 2016 and 2020.
- Researchers documented three distinct jar shapes (bulbous top with conical end; biconcial; cylindrical) on spurs, hill slopes and ridge lines.
Their significance
- While the jars are yet to be scientifically dated, the researchers said links could be drawn with the stone jars found in Laos and Indonesia.
- There are typological and morphological similarities between the jars found at all three sites.
- Dating done at the Laos site suggests that jars were positioned at the sites as early as the late second millennium BC.
- The other takeaway is the link to mortuary practices with human skeletal remains found inside and buried around the jars.
- In Indonesia, the function of the jars remains unconfirmed, although some scholars suggest a similar mortuary role.
Back2Basics: Megalithic Burials in India
- Megaliths were constructed either as burial sites or commemorative (non-sepulchral) memorials.
- The former are sites with actual burial remains, such as dolmenoid cists (box-shaped stone burial chambers), cairn circles (stone circles with defined peripheries) and capstones (distinctive mushroom-shaped burial chambers found mainly in Kerala).
- The urn or the sarcophagus containing the mortal remains was usually made of terracotta.
- Non-sepulchral megaliths include memorial sites such as menhirs. (The line separating the two is a bit blurry, since remains have been discovered underneath otherwise non-sepulchral sites, and vice versa.)
- Taken together, these monuments lend these disparate peoples the common traits of what we know as megalithic culture, one which lasted from the Neolithic Stone Age to the early Historical Period (2500 BC to AD 200) across the world.
- In India, archaeologists trace the majority of the megaliths to the Iron Age (1500 BC to 500 BC), though some sites precede the Iron Age, extending up to 2000 BC.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: SSLV, PSLV, GSLV
Mains level: Read the attached story
The Geosynchronous Satellite Launch Vehicle (GSLV) with improvements added to its cryogenic upper stage (CUS) is expected to be ready in the second half of this year.
What is GSLV?
- GSLV is an expendable space launch vehicle designed, developed, and operated by the ISRO to launch satellites and other space objects into Geosynchronous Transfer Orbits.
- GSLV is 49.13 m tall and tallest among all other vehicles of ISRO.
- It is a three-stage vehicle with a lift-off mass of 420 tonnes.
- ISRO first launched GSLV on April 18, 2001 and has made 13 launches since then.
Stages in GSLV
- The first stage comprises S139 solid booster with 138-tonne propellant and four liquid strap-on motors, with 40-tonne propellant.
- The second stage is a liquid engine carrying 40-tonne of liquid propellant.
- The third stage is the indigenously built Cryogenic Upper Stage (CUS) carrying 15-tonne of cryogenic propellants.
Variants in GSLV
- GSLV rockets using the Russian Cryogenic Stage (CS) are designated as the GSLV Mk I while versions using the indigenous Cryogenic Upper Stage (CUS) are designated the GSLV Mk II.
- All GSLV launches have been conducted from the Satish Dhawan Space Centre in Sriharikota.
Difference between PSLV and GSLV
- GSLV has the capability to put a heavier payload in the orbit than the Polar Satellite Launch Vehicle (PSLV).
- PSLV can carry satellites up to a total weight of 2000 kg into space and reach up to an altitude of 600-900 km.
- GSLV can carry weight up to 5,000 kg and reach up to 36,000 km.
- PSLV is designed mainly to deliver earth observation or remote sensing satellites, whereas, GSLV has been designed for launching communication satellites.
- GSLV delivers satellites into a higher elliptical orbit, Geosynchronous Transfer Orbit (GTO) and Geosynchronous Earth Orbit (GEO).
Back2Basics: ISRO’s transportation modules
(1) SLV
- In the space transportation domain, the commissioning of the Satellite Launch Vehicle-3 (SLV-3) project in the early 1970s was the first indigenous experimental satellite launch vehicle.
- As a four stage, all solid, launch vehicle, SLV-3 had its successful launch in July 1980, thrusting India into the select league of six countries with the capability to launch satellites on their own.
- The ASLV- Augmented Satellite Launch Vehicle project, in the early 1980s, was the next step of evolution in launch vehicle technology.
(2) PSLV
- In mid 80s came the Polar Satellite Launch Vehicle (PSLV) project. PSLV was successfully launched in 1994.
- The vehicle has proven to be a workhorse of ISRO, logging over 50 successful missions, launching national as well as foreign satellites.
- On 15 February 2017, PSLV created a world record by successfully placing 104 satellites.
- The nation embarked upon a highly challenging quest to master the complex cryogenic technology.
(3) GSLV
Discussed above.
(4) SSLV
- 600 kg to Low Earth Orbit (500 km) or
- 300 kg to Sun-synchronous Orbit (500 km)
- It would help launching small satellites, with the capability to support multiple orbital drop-offs.
- In future a dedicated launch pad in Sriharikota called Small Satellite Launch Complex (SSLC) will be set up.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Yakshagana
Mains level: Not Much
Many students from Madhya Pradesh, Uttar Pradesh, West Bengal, Gujarat, and Rajasthan are enrolling for training of Yakshagana theatre.
What is Yakshagana?
- Yakshagana is a traditional theater, developed in Dakshina Kannada, Udupi, Uttara Kannada, Shimoga and western parts of Chikmagalur districts, in the state of Karnataka and in Kasaragod district in Kerala.
- It emerged in the Vijayanagara Empire and was performed by Jakkula Varu.
- It combines dance, music, dialogue, costume, make-up, and stage techniques with a unique style and form.
- Towards the south from Dakshina Kannada to Kasaragod of Tulu Nadu region, the form of Yakshagana is called as ‘Thenku thittu’ and towards north from Udupi up to Uttara Kannada it’s called as ‘Badaga Thittu‘.
- It is sometimes simply called “Aata” or āṭa (meaning “the play”). Yakshagana is traditionally presented from dusk to dawn.
- Its stories are drawn from Ramayana, Mahabharata, Bhagavata and other epics from both Hindu and Jain and other ancient Indic traditions.
Try this question from CSP 2017:
Q.With reference to Manipuri Sankirtana, consider the following statements:
- It is a song and dance performance.
- Cymbals are the only musical instruments used in the performance.
- It is performed to narrate the life and deeds of Lord Krishna.
Which of the statements given above is/are correct?
(a) 1, 2 and 3.
(b) 1 and 3 only
(c) 2 and 3 only
(d) 1 only
Post your answers here.
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Microbots for drug delivery
Mains level: NA
An Indian researcher has found that it is possible to use light as a fuel to move microbots in real-body conditions with intelligent drug delivery that is selectively sensitive to cancer cells
Microswimmers for drug delivery
- Made from the two-dimensional compound poly (heptazine imide) carbon nitride (aka PHI carbon nitride), these microbots are nothing like the miniaturised humans.
- They range from 1-10 micrometre (a micrometre is one-millionth of a metre) in size, and can self-propel when energised by shining light.
- While carbon nitride is an excellent photo-catalyst, the two-dimensional PHI has a sponge-like structure full of pores and voids and charge storage properties.
- The researchers found that the ions in the salty solution passed through the pores of PHI carbon nitride.
- Thus, there was little or no resistance from the salt ions.
How do they swim across the blood?
- The PHI carbon nitride microparticles are photocatalytic.
- Like in a solar cell, the incident light is converted into electrons and holes.
- These charges drive reactions in the surrounding liquid. The charges react with the fluid surrounding them.
- This reaction, combined with the particle’s electric field, makes the microbots (micro-swimmers) swim.
- As long as there is light, electrons and holes are produced on the surface of the swimmers, which in turn react to form ions and an electric field around the swimmer.
- These ions move around the particle and cause fluid to flow around the particle.
- So this fluid flow causes the micro-swimmers to move.
How does the ion movement occur?
- The ions move from the bright surface of the micro-swimmer to the rear end.
- The diffusion of the swimming medium in one direction propels the micro-swimmer in the opposite direction.
- This is like a boat moving in the direction opposite to the oar strokes.
- The particles are nearly spherical, and the incident light illuminates one-half of the sphere, leaving the other dark.
- As photocatalysis is light-driven, it occurs only on the brightened hemisphere.
- As the ions move from the bright side to the dark side, micro-swimmers march in the direction of the light source.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Guru Nabha Das Ji
Mains level: Bhakti Movement
Punjab government has announced gazetted holiday on the birth anniversary of Guru Nabha Dass, a 16th century saint, taking it out from list of restricted holidays.
Who was Guru Nabha Dass?
- Guru Nabha Dass was born on April 8, 1537 at village Bhadrachalam on the bank of Godavari river in Khammam district, which falls in the present day Telangana.
- He belonged to Mahasha also known as doom or dumna community, which is one of the Schedule Caste communities.
- Since childhood, orphaned Guru Nabha Dass, whose original name was Narayan Dass, had an inclination towards spirituality.
- Two religious gurus — Agar Dass and Keel Dass — who were passing through his village took the orphan child to a temple at Ghalta Dham, which is now main pilgrimage of Nabhadassias, at Jaipur.
- People from this community are also known as Nabhadassias. They are known for making baskets and grain storage containers with bamboo.
His legacy
- Guru Nabha Dass wrote ‘Bhagatmal’ in 1585.
- It has the life history of around 200 saints. He died in 1643.
What is his connection with Punjab?
- Guru Nabha Dass used to visit village Pandori in Gurdaspur district where people of Doom community live.
- Some gurus of the community also used to live there.
What made government announce gazetted holiday now?
- Political parties can’t manage to ignore the sentiments of such a large community.
- The community had been requesting the government to declare April 8 as a gazetted holiday since long.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Recombination vs Mutation in viruses
Mains level: Severity of COVID
The World Health Organization (WHO) has flagged the emergence of a new variant of the SARS-CoV-2 virus — the XE recombinant.
How are variants created?
- SARS-CoV-2, the virus that causes COVID-19, is an RNA virus which evolves by accumulating genetic errors in its genome.
- These errors are produced when the virus infects a person and makes copies of itself inside the host’s cells.
- These errors (otherwise called mutations) are therefore a by-product of replication of SARS-CoV-2 inside the cell and may be carried forward as the virus continues to infect people.
- When viruses having a specific set of errors or mutations infect a number of people, this forms a cluster of infections descending from a common parental virus genome and is known as a lineage or a variant of the virus.
Who name these variants?
- The PANGO network, an open global consortium of researchers from across the world, provides a system for naming different lineages of SARS-CoV-2.
- Pangolin was developed to implement the dynamic nomenclature of SARS-CoV-2 lineages, known as the Pango nomenclature.
- These variants or lineages are widely followed by epidemiologists for tracking the evolution of SARS-CoV-2.
What is a recombinant variant?
- Apart from the errors in the virus genome, another process through which a virus increases its genetic diversity is recombination.
- Recombination occurs when, in extremely rare situations, two different lineages of the virus co-infect the same cell in the host and exchange fragments of their individual genomes.
- This generates a descendent variant having mutations that occurred in both the original lineages of the virus.
- Recombination of lineages happens in a variety of other viruses, including those that cause influenza, as well as other coronaviruses.
- Such recombination events occur typically in situations where two or more lineages of SARS-CoV-2 may be co-circulating in a certain region during the same time period.
- This co-circulation of lineages provides an opportunity for recombination to occur between these two lineages of SARS-CoV-2.
How many recombinant viruses have been detected?
- While recombination events are not frequently observed for the SARS-CoV-2 virus, multiple recombinant lineages have been designated during the pandemic.
- The recombinant lineages are annotated by PANGO with an ‘X’ followed by an alphabet which indicates the order of discovery.
- Some previously detected and designated lineages include XA, a recombinant of B.1.1.7 (Alpha) and B.1.177 detected in the U.K., lineage XB detected in the U.S., and lineage XC detected in Japan, which is a recombinant of B.1.1.7 (Alpha) and AY.29 sublineage of Delta.
- Three new recombinant lineages of SARS-CoV-2 have been recently designated by the PANGO network and are being monitored — XD, XE, and XF.
- Although currently present in a very low proportion of genomes in the U.K., early data from the country show evidence of community transmission of XF.
Are recombinant variants more deadly?
- Although recombination has been detected in SARS-CoV-2, it has not yet impacted public health in a unique way.
- There is little evidence to suggest that recombinant lineages have a varied clinical outcome compared to the currently dominant Omicron variant.
- It is certain at this point in time that more data will be needed to ascertain the impact of these lineages on the epidemiology of COVID-19.
What are the methods through which recombinants are identified?
- Identifying and tracking recombinant lineages for SARS-CoV-2 is a challenging task.
- This would require specialised tools and the availability of primary (or raw) data for genome sequences as similar variant combinations could also arise from inadvertent errors in sequencing or analysis as well as contamination of sequencing experiments.
- A cluster of recombinant genomes can be designated a lineage name by the PANGO network if it can be confirmed that samples in the cluster have a common origin and descend from two individual lineages of SARS-CoV-2.
- Additionally, there should be at least 5 genomes in the public domain belonging to the cluster, indicating an ongoing transmission of the lineage.
- Furthermore, screening the sequencing data of these samples should show no signs of contamination and meet the definition of a recombinant.
Way ahead
- Since recombinations are extremely rare occurrences, it is unclear how and why the viruses recombine.
- It is, therefore, important to track the recombination of SARS-CoV-2 lineages because it may lead to the generation of a viral lineage that is better at infecting people or transmitting from host to host.
- Monitoring circulating SARS-CoV-2 genomes for evidence of recombination will help gain a better understanding of the ongoing evolution of SARS-CoV-2.
- It will also provide information if a more “concerning” variant of the virus were to emerge.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Creation of new districts
Mains level: Administrative convenience
Andhra Pradesh has got a new map with the creation of 13 new districts, taking the number of total districts in the state to 26.
What are Districts?
- India’s districts are local administrative units inherited from the British Raj.
- They generally form the tier of local government immediately below that of India’s subnational states and territories.
- A district is headed by a Deputy Commissioner/ Collector, who is responsible for the overall administration and the maintenance of law and order.
- The district collector may belong to IAS (Indian Administrative Service).
- Districts are most frequently further sub-divided into smaller administrative units, called either tehsils or talukas or mandals, depending on the region.
How are new districts carved?
- The power to create new districts or alter or abolish existing districts rests with the State governments.
- This can either be done through an executive order or by passing a law in the State Assembly.
- Many States prefer the executive route by simply issuing a notification in the official gazette.
How does it help?
- States argue that smaller districts lead to better administration and governance.
- For example, in 2016, the Assam government issued a notification to upgrade the Majuli sub-division to Majuli district for “administrative expediency”.
Does the Central government have a role to play here?
- The Centre has no role to play in the alteration of districts or creation of new ones. States are free to decide.
- The Home Ministry comes into the picture when a State wants to change the name of a district or a railway station.
- The State government’s request is sent to other departments and agencies such as the Ministry of Earth Sciences, Intelligence Bureau, Department of Posts, Geographical Survey of India Sciences and the Railway Ministry seeking clearance.
- A no-objection certificate may be issued after examining their replies.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Sacred Grooves
Mains level: Read the attached story
India’s sacred groves are being gradually altered due to ever-expanding human populations, pollution and removal of biomass; effective conservation is the need of the hour to maintain their functional values
What are Sacred Grooves?
- Sacred groves of India are forest fragments of varying sizes, which are communally protected, and which usually have a significant religious connotation for the protecting community.
- It usually consists of a dense cover of vegetation including climbers, herbs, shrubs and trees, with the presence of a village deity and is mostly situated near a perennial water source.
- Sacred groves are considered to be symbols of the primitive practice of nature worship and support nature conservation to a great extent.
- The introduction of the protected area category community reserves under the Wild Life (Protection) Amendment Act, 2002 has introduced legislation for providing government protection to community-held lands, which could include sacred groves.
Historical references
- Indian sacred groves are often associated with temples, monasteries, shrines, pilgrimage sites, or with burial grounds.
- Historically, sacred groves find their mentions in Hindu, Jain and Buddhist texts, from sacred tree groves in Hinduism to sacred deer parks in Buddhism for example.
- Sacred groves may be loosely used to refer to natural habitat protected on religious grounds.
- Other historical references to sacred groves can be obtained in Vrukshayurveda an ancient treatise, ancient classics such as Kalidasa’s Vikramuurvashiiya.
- There has been a growing interest in creating green patches such as Nakshatravana
Regulation of activities in Sacred Grooves
- Hunting and logging are usually strictly prohibited within these patches.
- Other forms of forest usage like honey collection and deadwood collection are sometimes allowed on a sustainable basis.
- NGOs work with local villagers to protect such groves.
- Traditionally, and in some cases even today, members of the community take turns to protect the grove.
Threats to such grooves
- Threats to the groves include urbanization, and over-exploitation of resources.
- While many of the groves are looked upon as abode of Hindu deities, in the recent past a number of them have been partially cleared for construction of shrines and temples.
Total grooves in India
- Around 14,000 sacred groves have been reported from all over India, which act as reservoirs of rare fauna, and more often rare flora, amid rural and even urban settings.
- Experts believe that the total number of sacred groves could be as high as 100,000.
- They are called by different names in different states:
- Sarna in Bihar
- Dev Van in Himachal Pradesh
- Devarakadu in Karnataka
- Kavu in Kerala
- Dev in Madhya Pradesh
- Devarahati or Devarai in Maharashtra
- Lai Umang in Maharashtra
- Law Kyntang or Asong Khosi in Meghalaya
- Oran in Rajasthan
- Kovil Kadu or Sarpa Kavu in Tamil Nadu
What lies ahead?
- The groves have great research value in in situ conservation of rare, endangered and threatened plant species.
- It is high time that public awareness is created about the importance of these sacred groves, developmental activities are banned and the felling of trees or removal of any other vegetation is completely stopped.
- This is possible only by way of enacting a special law for the protection and management of sacred groves.
- As the management practices and other rituals vary from state to state, the concerned state governments may promulgate such an act as suitable for the state.
- The idea should be to protect certain rare, endangered and threatened plant species in the era of global warming and climate change.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Near Field Communication (NFC)
Mains level: Not Much
Google Pay has recently launched a new feature in India, ‘Tap to pay for UPI’, in collaboration with Pine Labs. The feature makes use of Near Field Communication (NFC) technology.
What is Near Field Communication (NFC)?
- NFC is a short-range wireless connectivity technology that allows NFC-enabled devices to communicate with each other and transfer information quickly and easily with a single touch.
- It makes possible to pay bills, exchange business cards, download coupons, or share a document.
How does it work?
- NFC transmits data through electromagnetic radio fields, to enable communication between two devices. Both devices must contain NFC chips, as transactions take place within a very short distance.
- NFC-enabled devices must be either physically touching or within a few centimetres from each other for data transfer to occur.
When did NFC tech start?
- In 2004, consumer electronics companies, Nokia, Philips and Sony together formed the NFC Forum, which outlined the architecture for NFC technology to create powerful new consumer-driven products.
- Nokia released the first NFC-enabled phone in 2007.
How will this technology work with the recently launched feature, ‘Tap to pay for UPI’?
- Google Pay has been the first among UPI apps to bring the Tap to Pay feature working on POS terminals.
- It will allow users with UPI accounts configured on Google Pay to make payments just by tapping their NFC-enabled Android smartphones on any Pine Labs Android POS terminal.
- Once users tap their phones on the POS terminal, it will automatically open the Google pay app with the payment amount pre-filled.
- Users can then verify the amount and merchant name and authenticate the payment, using their UPI PIN.
- The process is much faster compared to scanning a QR code or entering the UPI-linked mobile number which has been the conventional way till now.
What are the other applications of NFC technology?
- NFC tech has a wide range of applications besides driving payment services.
- It is used in contactless banking cards to perform money transactions or to generate contact-less tickets for public transport.
- Contactless cards and readers use NFC in several applications from securing networks and buildings to monitoring inventory and sales, preventing auto theft, keeping tabs on library books,
- NFC is behind the cards that we wave over card readers in subway turnstiles and on buses to check tickets.
- It is present in speakers, household appliances, and other electronic devices that we monitor and control through our smartphones.
- With just a touch, NFC can also set up WiFi and Bluetooth devices in our homes, investopedia noted.
- It also has an application in healthcare, to monitor patient stats through NFC-enabled wristbands.
- NFC is used in wireless charging too.
How safe is this technology?
- NFC technology is designed for an operation between devices within a few centimetres from each other.
- This makes it difficult for attackers to record the communication between the devices compared to other wireless technologies which have a working distance of several metres, according to the NFC forum, a non-profit industry association.
- The user of the NFC-enabled device determines by the touch gesture which entity the NFC communication should take place with, making it more difficult for the attacker to get connected.
- The security level of the NFC communication is by default higher compared to other wireless communication protocols.
Where does it stand in comparison to other wireless technologies?
- There are other wireless technologies available which are replacing cable-based connections.
- The IrDa technology is a short range (a few metres) connection based on the exchange of data over infrared light where the two communication devices must be positioned within a line of sight.
- Today, this technology is mainly used for remote control devices. For larger data communication with computer devices this technology was replaced by Bluetooth or WiFi connections.
- However, for these technologies’ receiver devices need their own power supply due to the larger working distance.
- Therefore, the receiving device cannot be powered by the radiofrequency (RF) field like in NFC, the NFC forum highlighted.
- Another consequence of the larger working distance is the need for the user to configure their device and to pair them together for communication.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Wheat
Mains level: Indias export of agricultural commodities
Russia and Ukraine account for about 25% of the world’s wheat exports. However, Russia’s invasion of Ukraine and the subsequent Western sanctions against Moscow have curtailed wheat supplies drastically.
India eyeing the global wheat basket
- As a result of War, many countries which were sourcing wheat mainly from these two nations are now in a dire need of alternatives.
- India, the largest wheat producer after China, is reported to be eyeing the void.
- The government plans to allow increased exports to cash in on the higher price of wheat in the international market.
- With harvesting season (March to May) coinciding with the supply crunch, a bumper crop is also expected again this year.
Global wheat scenario
- While Russia and Ukraine exported 183 million tonnes (MT) and 91 MT of wheat, respectively, between 2017 and 2021, India exported just a fraction of its output, or just 12.6 MT, in the period.
- Five other countries accounted for the bulk of wheat exports in this period, including the European Union (157 MT), the U.S. (125 MT), Canada (112 MT) and Australia (83 MT).
- India, which had the second-highest wheat supply (including production, existing stocks and imports) in this period at 613 million tonnes, exported only 2% of this, with about 80% used for domestic consumption, and the rest stored.
Impact of the war
- Many countries in Africa, West Asia and Southeast Asia rely heavily on Russian and Ukrainian wheat.
- Egypt, the biggest importer of wheat, sources 93% of its needs from the East European neighbors. Indonesia, the second-largest importer, has a 30% dependence on these two nations.
- African nations such as Sudan (60% reliance), Tanzania (64%), Libya (53%), Tunisia (52%), and West Asian countries including Lebanon (77% dependency), Yemen (50%) and the UAE (42%) are also highly dependent on supplies from the two neighbors now at war.
India’s focus markets
- India is now focussing on exporting wheat to many nations such as Egypt, Turkey, Nigeria, Algeria, West Asia, Indonesia, Vietnam, Sri Lanka, Bangladesh, Thailand, the Philippines, Morocco and Tanzania.
- To give impetus to the export promotion of wheat as well as to bring focus on the challenges and bottlenecks faced in production and export, APEDA has created a task group.
Legal hurdles over Wheat Exports
- If India decides to export wheat from its stocks, some developed nations may raise objections at the World Trade Organisation.
- Already, in March, India was accused of exporting rice from its stocks.
- India had replied that its rice exports were not from stocks set aside under the public stockholding programs.
India’s consideration
- The Supreme Court in the Right to Food case, observed that the peace clause adopted in WTO’s Bali Ministerial in 2014 does not prevent India from exporting foodgrains.
- With the buffer stocks at hand, India should increase its wheat exports in order to stabilise global prices to the extent that it can.
- It is also important because the countries that were dependent on Russia and Ukraine for their wheat are looking for an alternative source.
Way ahead
- There is a need to prioritise local prices and ensure adequate supplies for domestic consumption before deciding on the quantum of exports.
- Ensuring the stability of prices in India and availability of grain for internal consumption should be of utmost priority to the Indian government
- The government should plan this move in such a way that it does not impact local consumption.
- A bumper crop of wheat is expected, so the government can procure enough for its distribution and buffer needs.
- Further, as of now, there are no export restrictions, so farmers can also get the advantage of higher prices by selling the surplus to private traders for exports.
Try this PYQ from CSP 2019:
Q. Among the agricultural commodities imported by India, which one of the following accounts for the highest imports in terms of value in the last five years?
(a) Spices
(b) Fresh fruits
(c) Pulses
(d) Vegetable oils
Answer is subjective to the year. But still you can give it a try.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Raja Ravi Varma
Mains level: Not Much
Raja Rai Varma’s Draupadi Vastraharan is expected to fetch between Rs 15 and Rs 20 crore at an auction.
Who was Raja Ravi Varma?
- Raja Ravi Varma was born in April 1848 in Kilimanoor, Kerala, to a family which was very close to the royals of Travancore.
- Often referred to as the father of modern Indian art, he is widely known for his realistic portrayal of Indian gods and goddesses.
- While he majorly painted for the royalty, he is also credited for taking art to the masses with his prints and oleographs.
- At a young age, he would draw animals and everyday scenes on the walls in indigenous colours made from natural materials such as leaves, flowers and soil.
- His uncle, Raja Raja Varma, noticed this and encouraged his talent.
- Patronised by Ayilyam Thirunal, the then ruler of Travancore, he learnt watercolour painting from the royal painter Ramaswamy Naidu, and later trained in oil painting from Dutch artist Theodore Jensen.
How he became an artist of the royals?
- Varma became a much sought-after artist for the aristocrats and was commissioned several portraits in late 19th century.
- Arguably, at one point, he became so popular that the Kilimanoor Palace in Kerala opened a post office due to the sheer number of painting requests that would come in for him.
- He travelled across India extensively, for work and inspiration.
Fame as a notable painter
- Following a portrait of Maharaja Sayajirao of Baroda, he was commissioned 14 Puranic paintings for the Durbar Hall of the new Lakshmi Vilas Palace at Baroda.
- Depicting Indian culture, Varma borrowed from episodes of Mahabharata and Ramayana for the same.
- He also received patronage from numerous other rulers, including the Maharaja of Mysore and Maharaja of Udaipur.
- As his popularity soared, the artist won an award for an exhibition of his paintings at Vienna in 1873.
- He was also awarded three gold medals at the World’s Columbian Exposition in Chicago in 1893.
Nature of his artforms
- Much of his celebrated art also borrows heavily from Indian mythology.
- In fact, he is often credited with defining the images of Indian gods and goddesses through his relatable and more realistic portrayals often painted with humans as models.
- The depictions include Lakshmi as the goddess of wealth, Saraswati as the goddess of knowledge and wisdom, and Lord Vishnu with his consorts, Maya and Lakshmi.
How he took Indian art to the masses?
- Raja Ravi Varma aspired to take his art to the masses and the intent led him to open a Lithographic Press in Bombay in 1894.
- The idea, reportedly, came from Sir T Madhava Rao, former Dewan of Travancore and later Baroda, in a letter where he pointed out to Varma that since it was impossible for him to meet the large demand for his work, it would be ideal for him to send some of his select works to Europe and have them produced as oleographs.
- Varma, instead, chose to establish a printing press of his own.
- The first picture printed at Varma’s press was reportedly The Birth of Shakuntala, followed by numerous mythological figures and saints such as Adi Shankaracharya.
Try this PYQ:
Q. There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings?
(a) Bagh caves
(b) Ellora caves
(c) Lomas Rishi cave
(d) Nasik caves
Post your answers here.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Darlong Tribes
Mains level: Scheduled Tribes and issues
The Lok Sabha recently passed a bill to amend a constitutional order to include Darlong, a tribal clan in Tripura which was among the generic Halam community till now, in the list of Scheduled Tribes (ST).
Who are Darlongs?
- Darlong is a tribal community of 11,000 people.
- Despite its small population, the community has a high prevalence of education, cultural activities and members of the community are serving in different high positions in the local administration.
- Darlongs, despite being Scheduled Tribes, were never given ST certificates.
- Since they were considered a generic tribe under the Kuki community, they were handed their tribal certificates as members of ‘Kuki’ community.
- The subsequent identity crisis among them, especially Darlong youths, who were equipped with modern education, culminated in the demand for a separate statutory identity of their own in 1995.
- The group is a small tribal clan but has produced a high number of educated people proportionate to its population in the state.
- People from the Darlong community, like many other tribal communities, are now serving in high positions in the state administration, academia, and public services.
- Tribal musicologist and Rosem (tribal instrument) maestro Thanga Darlong was conferred the prestigious Padma Shri award a few years back for his contribution to culture.
Why is tribal identity a big issue in Tripura?
- Out of 37 lakh people of Tripura, nearly 30 per cent are tribals, who mostly live in areas under jurisdiction of the Tripura Tribal Areas Autonomous District Council (TTAADC).
- They are spread in patches across all eight districts and covering 70 per cent of the state’s geographical area.
- The state saw tribals become minority in their own state due to arrival of East Pakistani refugees who fled their country.
- Tribal identity is a major issue in Tripura, which is also one of the major subjects dominating the state politics now.
- There is rising demand of Greater Tipraland – a proposed separate state for Tiprasa or Tripuris (tribal and non-tribal) living in the state.
Back2Basics: Tribes of Tripura
- Tripura, the tiny Northeast state of 37 lakh people houses 19 tribal communities.
- These include Tripuri or Debbarma, Reangs or Brus, Jamatia, Noatia, Uchoi, Chakma, Mog, Lushai, Kuki, Munda, Kour, Oram, Santhal, Bhil, Bhutia, Chaimar or Sermai, Garo, Khasi, Lepcha and Halam.
- Many of these communities are further divided into sub-tribes.
- For example, Kukis have nearly 17-18 sub-tribes within the community.
- It is an umbrella tribal community including many smaller clans like Khasi, Lushai, Hmars and other generic clans.
- In course of time, Lushai, Hmar, Garo etc. came out of Kuki as separate communities.
- Halam community also has several sub-tribes such as Rangkhawl, Ranglong, Dab, Chaimar or Sermai, Bong, Korbong, Harbong, Bongcher etc.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Hindu new year , Gudi Padwa
Mains level: NA
The President of India has sent his greetings to fellow citizens on the eve of Chaitra Sukladi, Ugadi, Gudi Padwa, Cheti Chand, Navreh and Sajibu Cheiraoba.
Gudi Padwa
- Gudi Padwa is a spring-time festival that marks the traditional New Year for Marathi and Konkani Hindus, but is also celebrated by other Hindus as well.
- It is celebrated in and around Maharashtra, Goa, and the union territory of Damaon on the first day of the Chaitra month, to mark the beginning of the New Year according to the luni-solar method of the Hindu calendar.
- Padava or paadvo comes from the Sanskrit word pratipada, which is the first day of a lunar fortnight.
- The spring festival is observed with colourful floor decorations called rangoli, a special Gudhi dvaja (flag garlanded with flowers, mango and neem leaves, topped with upturned silver or copper vessels), street processions, dancing& festive foods.
Significance
- Gudhi Padva signifies the arrival of spring and to the reaping of Rabi crops.
- The festival is linked to the mythical day on which Hindu god Brahma created time and universe.
- To some, it commemorates the coronation of Rama in Ayodhya after his victory over evil Ravana, or alternatively the start of Shalivahan calendar after he defeated the Huns invasion in the 1st century.
State-wide celebrations
- Bihu among the Assamese of Assam.
- Cheti Chand among the Sindhi people
- Navreh among the Kashmiri Pandits in Jammu and Kashmir.
- Pahela Baishakh among the Bengalis in West Bengal and Bangladesh.
- Puthandu among the Tamils in Tamil Nadu.
- Samvatsar Padvo among Hindu Konkanis of Goa and Konkani diaspora in Kerala
- Vaisakhi or Baisakhi among the Punjabis in Punjab.
- Vishu or among the Malayalis in Kerala.
- Ugadi among the south-Indian states of Karnataka, Andhra Pradesh and Telangana.
- Sajibu Cheiraoba in Manipur
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Project NETRA
Mains level: Space Debris
The Indian Space Research Organisation (ISRO) is building up its orbital debris tracking capability by deploying new radars and optical telescopes under the Network for Space Objects Tracking and Analysis (NETRA) project.
Project NETRA
- The project will give India its own capability in space situational awareness (SSA) like the other space powers — which is used to ‘predict’ threats from debris to Indian satellites.
- NETRA’s eventual goal is to capture the GEO, or geostationary orbit, scene at 36,000 km where communication satellites operate.
- The initial SSA will first be for low-earth orbits or LEO which have remote-sensing spacecraft.
- Under NETRA the ISRO plans to put up many observational facilities: connected radars, telescopes; data processing units and a control centre.
- They can, among others, spot, track and catalogue objects as small as 10 cm, up to a range of 3,400 km and equal to a space orbit of around 2,000 km.
- The NETRA effort would make India a part of international efforts towards tracking, warning about and mitigating space debris.
What NETRA consists of?
- In the plans are a high-precision, long range telescope in Leh and a radar in the North East.
- Along with them, we will also use the Multi-Object Tracking Radar (MOTR) that we have put up at the Satish Dhawan Space Centre in Sriharikota, and the telescopes at Ponmudi and Mount Abu to get a broad SSA picture.
- NORAD, or the North American Aerospace Defense Command, is an initiative of the U.S. and Canada that shares selective debris data with many countries.
- The new SSA centre would consolidate debris tracking activities that are now spread across ISRO centres.
- Currently there are 15 functional Indian communication satellites in the geostationary orbit of 36,000 km; 13 remote sensing satellites in LEO of up to 2,000 km; and eight navigation satellites in medium earth orbits.
Why Space debris matters?
- Space junk or debris consists of spent rocket stages, dead satellites, fragments of space objects and debris resulting from ASAT.
- Hurtling at an average speed of 27,000 kmph in LEO, these objects pose a very real threat as collisions involving even centimetre-sized fragments can be lethal to satellites.
- Last year, ISRO monitored 4,382 events in LEO and 3,148 events in the geostationary orbit where space objects closely approached Indian assets.
- Fragments from the Fengyun-1C satellite (part of the anti-satellite test (ASAT) by China in 2007) and the Cosmos 2251-Iridium satellite collision in 2009 accounted for the maximum number of these threats.
- The observations also covered 84 “close approaches of less than one km” between Starlink satellites and Indian assets.
Enhancing Space situational awareness (SSA)
- India, as a responsible space power, should have SSA as a part of a national capability, as in the U.S. This is a vital requirement for protecting our space assets and a force multiplier.
- The SSA has a military quotient to it and adds a new ring to the country’s overall security.
- It uses satellites, ground and air radars to secure its two countries against attacks from air, space or sea.
- With long-range tracking radars, the SSA also provides us the capability of an early warning system against ballistic missiles coming in at a height.
- Apart from radars and telescopes, he said India should also think of deploying satellites that track other satellites — as the U.S. and other space powers had done.
- Combined with other elements of military intelligence SSA would help us to understand motives behind any suspicious orbit changes of other satellites and to know if they were spying on or harming our spacecraft.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Startup India Initiative
Mains level: Success of the scheme
A research, reviewing India’s entrepreneurial policy Startup India, affirmed its positive impact in reducing regional entrepreneurial disparities.
Startup India Initiative
- The Startup India campaign was first announced by PM Modi during his speech on 15 August 2015 address from the Red Fort.
- The action plan for this initiative is focusing on three areas:
- Simplification and Handholding.
- Funding Support and Incentives.
- Industry-Academia Partnership and Incubation.
- An additional area relating to this initiative is to discard restrictive States Government policies within this domain, such as License Raj, Land Permissions, Foreign Investment Proposals, and Environmental Clearances.
- It was organized by the Department for promotion of industry and internal trade (DPI&IT).
The success of the scheme
- Minister for Commerce and Industry has informed the Lok Sabha that the entrepreneurial portal had more than 65,000 startups registered.
- Of which, 40 attained the ‘unicorn’ status in the last twelve months, bringing the total as of date to 90.
- India now ranks third among global startup eco-systems.
- The networking, training and mentoring facilities provided by Startup India alongside entrepreneurship outreach campaigns in tier-2 and tier-3 cities, helped address regional entrepreneurial disparities in India.
Limitations to its success
(1) Heavy concentration in megacities
- Entrepreneurship continues to be “highly concentrated” in three megacities, namely, Mumbai, Bengaluru and Delhi NCR.
- India’s venture capital industry is also clustered in and around these three cities.
- Such concentration can lead to increased economic inequality and hinder emergence of entrepreneurs from industries other than those belonging to the clusters.
(2) Narrow Representation
- The Startup India Action Plan document has no mention of the words ‘caste’, ‘tribe’, ‘marginalised’, ‘indigenous’ or ‘social group’.
- Additionally, the policy’s reliance on technology does not take into consideration India’s digital divide, especially with respect to urban and rural areas.
(3) Few Women in the industry
- There is an under-representation of women and marginalized caste groups in the national startup ecosystem.
Dedicated measures to support Women
- 10% of the fund in the Fund of Funds operated by Small Industries Development Bank of India (SIDBI) has been reserved for women-led startups.
- Further, all the alternate investment funds where the SIDBI takes equity have been mandated to contribute 20% in business which are women led.
- There is a capacity-building program and a dedicated webpage for women on the portal.
Way ahead
- There is a need for policies and progressive strategies from governments to encourage startups and provide access and assistance in key areas including tax clarity, incubation, affordability and licensing.
- In any case, governments should be well prepared and dedicated to creating a culture of startups to impact the entrepreneurial ecosystem in their cities, countries and citizens.
Also read:
[Burning Issue] Five Years of Startup India Scheme
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Sariskta TR
Mains level: Forest fires
A massive fire has broken out in the Sariska Tiger Reserve and Air Force helicopters equipped with water sprays are battling to bring it under control.
Sariska Tiger Reserve
- Sariska Tiger Reserve is a tiger reserve in Alwar district, Rajasthan.
- It stretches over an area of 881 sq km comprising scrub-thorn arid forests, dry deciduous forests, grasslands, and rocky hills.
- This area was a hunting preserve of the Alwar state and was declared a wildlife sanctuary in 1958.
- It was given the status of a tiger reserve making it a part of India’s Project Tiger in 1978.
- It is the first reserve in the world with successfully relocated tigers.
- It is a part of the Aravalli Range and the Khathiar-Gir dry deciduous forests eco-region.
Existential threats
- It is rich in mineral resources, such as copper.
- In spite of the Supreme Court’s 1991 ban on mining in the area, marble mining continues to threaten the environment.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Microplastics
Mains level: Microplastics Contamination
A study by researchers from The Netherlands has found Microplastics in blood samples. About half of these were PET (polyethylene tertraphthalate) plastics, which is used to make food grade bottles.
What are Microplastics?
- Microplastics are tiny bits of various types of plastic found in the environment.
- The name is used to differentiate them from “macroplastics” such as bottles and bags made of plastic.
- There is no universal agreement on the size of microplastics. It defines microplastic as less than 5mm in length.
- However, for the purposes of this study, since the authors were interested in measuring the quantities of plastic that can cross the membranes and diffuse into the body via the blood stream.
- Hence they agreed on an upper limit on the size of the particles as 0.0007 millimetre.
What were the plastics that the study looked for in the blood samples?
- The study looked at the most commonly used plastic polymers.
- These were polyethylene tetraphthalate (PET), polyethylene (used in making plastic carry bags), polymers of styrene (used in food packaging), poly (methyl methylacrylate) and poly propylene.
- They found a presence of the first four types.
Significance of the study
- Making a human health risk assessment in relation to plastic particles is not easy, perhaps not even possible, due to the lack of data on exposure of people to plastics.
- In this sense, it is important to have studies like this one.
- The authors of the paper also remark that validated methods to detect the tiny (trace) amounts of extremely small-sized (less than 10 micrometre) plastic particles are lacking.
- Hence this study, which builds up a methods to check the same, is important.
Health hazard of microplastics
- It is not yet clear if these microplastics can cross over from the blood stream to deposit in organs and cause diseases.
- The report point out that the human placenta has shown to be permeable to tiny particles of polystyrene ( 50, 80 and 24 nanometre beads).
- Experiments on rats where its lungs were exposed to polystryrene spheres (20 nanometre) led to translocation of the nanoparticles to the placental and foetal tissue.
- Oral administration of microplastics in rats led to accumulation of these in the liver, kidney and gut.
- Further studies have to be carried out to really assess the impact of plastics on humans.
Try this PYQ:
Q. Why is there a great concern about the ‘microbeads’ that are released into environment?
(a) They are considered harmful to marine ecosystems.
(b) They are considered to cause skin cancer in children.
(c) They are small enough to be absorbed by crop plants in irrigated fields.
(d) They are often found to be used as food adulterants.
Post your answers here.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Coral Bleaching
Mains level: Coral Reefs and their significance
The management authority of the world’s largest coral reef system, Australia’s Great Barrier Reef, confirmed on March 25 that the reef is experiencing a mass coral bleaching event.
What are Coral Reefs?
- Corals are marine invertebrates or animals not possessing a spine.
- Each coral is called a polyp and thousands of such polyps live together to form a colony, which grows when polyps multiply to make copies of themselves.
- Australia’s Great Barrier Reef is the world’s largest reef system stretching across 2,300 km.
- It hosts 400 different types of coral, gives shelter to 1,500 species of fish and 4,000 types of mollusc.
- Corals are of two types — hard coral and soft coral:
- Hard corals, also called hermatypic or ‘reef building’ corals extract calcium carbonate (also found in limestone) from the seawater to build hard, white coral exoskeletons.
- Soft coral polyps, however, borrow their appearance from plants, attach themselves to such skeletons and older skeletons built by their ancestors. Soft corals also add their own skeletons to the hard structure over the years and these growing multiplying structures gradually form coral reefs. They are the largest living structures on the planet.
How do the feed themselves?
- Corals share a symbiotic relationship with single-celled algae called zooxanthellae.
- The algae provides the coral with food and nutrients, which they make through photosynthesis, using the sun’s light.
- In turn, the corals give the algae a home and key nutrients.
- The zooxanthellae also give corals their bright colour.
What is Coral Bleaching?
- Bleaching happens when corals experience stress in their environment due to changes in temperature, pollution or high levels of ocean acidity.
- Under stressed conditions, the zooxanthellae or food-producing algae living inside coral polyps start producing reactive oxygen species, which are not beneficial to the corals.
- So, the corals expel the colour-giving zooxanthellae from their polyps, which exposes their pale white exoskeleton, giving the corals a bleached appearance.
- This also ends the symbiotic relationship that helps the corals to survive and grow.
- Severe bleaching and prolonged heat stress in the external environment can lead to coral death.
Impact of climate change
- Over the last couple of decades, climate change and increased global warming owing to rising carbon emissions and other greenhouse gases have made seas warmer than usual.
- Under all positive outlooks and projections in terms of cutting greenhouse gases, sea temperatures are predicted to increase by 1.5°C to 2°C by the time the century nears its end.
- The first mass bleaching event had occurred in 1998 when the El Niño weather pattern caused sea surfaces in the pacific ocean to heat up; this event caused 8% of the world’s coral to die.
- The second event took place in 2002.
- In the past decade, however, mass bleaching occurrences have become more closely spaced in time, with the longest and most damaging bleaching event taking place from 2014 to 2017.
Significance of Corals
- Coral reefs support over 25% of marine biodiversity, including fish, turtles and lobsters; even as they only take up 1% of the seafloor.
- The marine life supported by reefs further fuels global fishing industries. Even giant clams and whales depend on the reefs to live.
- Besides, coral reef systems generate $2.7 trillion in annual economic value through goods and service trade and tourism.
- In Australia, the Barrier Reef, in pre-COVID times, generated $4.6 billion annually through tourism and employed over 60,000 people including divers and guides.
- Aside from adding economic value and being a support system for aquatic life, coral reefs also provide protection from storm waves.
- Dead reefs can revive over time if there are enough fish species that can graze off the weeds that settle on dead corals, but it takes almost a decade for the reef to start setting up again.
Current condition of the Great Barrier Reef
- The United Nations Intergovernmental Panel on Climate Change (IPCC) released its report this month, which warned that the life of the Great Barrier is in grave danger.
- The report said that if temperatures continue to rise, bleaching events may occur more often and a large proportion of the remaining reef cover in Australia could be lost.
- Just a couple of weeks after this warning, the Barrier Reef Authority confirmed a mass bleaching phenomenon affecting all pockets of the reef system.
Try this PYQ:
Q. Consider the following statements:
- Most of the world’s coral reefs are in tropical waters.
- More than one third of the world’s coral reefs are located in the territories of Australia, Indonesia and Philippines.
- Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.
Which of the above statements is/are correct?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1 and 3 only
Post your answers here.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now
Note4Students
From UPSC perspective, the following things are important :
Prelims level: Articulated All-Terrain Vehicles
Mains level: Not Much
The Indian Army has issued a Request For Information (RFI) for the supply of Articulated All-Terrain Vehicles to be deployed in Ladakh and Kutch.
What are Articulated All-Terrain Vehicles?
- Articulated ATV is a twin cabin, tracked, amphibious carrier for off road mobility.
- The special design of this equipment exerts low ground pressure on the soil and a pull-push mode of locomotion between two cabins facilitates mobility over varied terrains like snow, desert and slush.
- A ballistic protection in the cabin body ensures protection to troops travelling in it from small arms fire.
- They can reach where wheeled vehicles cannot due to deep snow, slush or marshy terrain and can be very effective for patrolling and rapid deployment in operational situations.
Utility of these vehicles
- These vehicles are very useful to move troops or supplies in snow-bound terrains and in marshy/sandy environments.
- The Indian Army wishes to use these vehicles in the snow-bound areas of Ladakh and in the marshy terrain of the Rann of Kutch.
UPSC 2022 countdown has begun! Get your personal guidance plan now! (Click here)
Get an IAS/IPS ranker as your 1: 1 personal mentor for UPSC 2024
Attend Now