UPSC Prelims Current Affairs for 1 September 2026

Ghepan Lake

September 1, 2026

Ghepan Lake Latest News

Learning from the devastation caused by the flood resulting from a glacial burst in Nepal, the Lahaul-Spiti district administration recently decided to further strengthen monitoring and precautionary measures regarding the Ghepan Glacial Lake.

About Ghepan Lake

Ghepang Ghat glacial lake, known locally as Ghepan Lake, is a high-altitude glacial lake located in the Lahaul region of Himachal Pradesh.
It is situated at an altitude of 4,070 meters.
Named after Ghepan, the protector deity of Lahaul, the lake has deep ties to local culture and faith.
The lake is known for its enchanting turquoise blue waters and glacial surroundings.
A total of three hanging glaciers feed Ghepan Lake. It is unusual to see this kind of setting of glaciers feeding alpine lakes at this height, as it happens deep in the Himalayas, above 15,000 feet.
The lake is a popular but challenging trekking destination, with the trek generally beginning from Sissu in the Lahaul Valley.
Over the past three decades, rapid glacier melt has expanded the lake at an alarming pace, turning it into a serious threat for communities living downstream.
- A sudden collapse could release a huge volume of water, rocks, and debris, a type of disaster known as a glacial lake outburst flood.
- The widening of this lake is not an isolated event; it reflects the wider impacts of climate change in the Western Himalaya.

News: HT

Ghepan Lake FAQs

Q1: Where is Ghepan Lake located?

Ans: It is located in the Lahaul region of Himachal Pradesh.

Q2: At what altitude is Ghepan Lake situated?

Ans: Ghepan Lake is situated at an altitude of 4,070 metres.

Q3: What is the colour of the waters of Ghepan Lake?

Ans: Ghepan Lake is known for its turquoise blue waters.

Q4: What has happened to Ghepan Lake over the past three decades?

Ans: Rapid glacier melt has caused the lake to expand significantly over the past three decades.

Rotenone

September 1, 2026

Rotenone Latest News

In a remote corner of Southcentral Alaska, state biologists carried out a dramatic restoration: they treated an entire lake with rotenone, a plant-derived piscicide, to wipe out an invasive population of northern pike.

About Rotenone

It is a naturally occurring compound derived from the roots of tropical plants in the genus Derris, Lonchocarpus, or Tephrosia.
It is commonly used as an insecticide and a pesticide.
It has been used for decades in fisheries management to remove unwanted fish from lakes and streams.
When applied at carefully calculated concentrations, it blocks oxygen uptake in fish gills, killing fish while leaving most other aquatic organisms unaffected.
The chemical breaks down relatively quickly in sunlight and warm water.
Currently, rotenone is commercially available as either a wettable powder or liquid.

Key Facts about Northern Pike

It is a freshwater predatory fish belonging to the pike family (Esocidae).
Scientific Name: Esox lucius
Habitat and Distribution:
- They are native in all of the circumpolar regions.
- They can be found through much of the northern reaches of the USA, parts of Alaska, Canada, Europe, and Asia in both rivers and lakes as well as the brackish waters of the Baltic Sea.
- Unfortunately this hearty fish species is often found out of its northern native range, where they can become a nuisance because they devour other native fish such as trout, perch, and bass.
Features:
- Their elongated slender bodies help them hide in weeds and among logs and rocks to ambush prey half their size.
- They have a long head and flattened snout. Their mouths are enormous, with a one-way road of teeth.
- These aggressive fish are striking in appearance, usually brownish green on top and sides covered with whitish bar-like spots.
- The fins are dashed with red and brown streaks and darker dots, and the belly is cream-colored and white.
Conservation Status:
- IUCN Red List: Least Concern

News: TOI

Rotenone FAQs

Q1: What is rotenone?

Ans: Rotenone is a naturally occurring compound derived from the roots of tropical plants belonging to the genera Derris, Lonchocarpus, and Tephrosia.

Q2: What is rotenone commonly used for?

Ans: Rotenone is commonly used as an insecticide and pesticide.

Q3: How has rotenone been used in fisheries management?

Ans: It has been used to remove unwanted fish from lakes and streams.

Q4: How does rotenone kill fish?

Ans: At carefully calculated concentrations, rotenone blocks oxygen uptake in fish gills, resulting in the death of fish.

Attunli Hydroelectric Project

September 1, 2026

Attunli Hydroelectric Project Latest News

The Expert Appraisal Committee (EAC) for River Valley and Hydroelectric Projects recently recommended environmental clearance for SJVN Limited’s 680 MW Attunli Hydroelectric Project in Dibang Valley district of Arunachal Pradesh.

About Attunli Hydroelectric Project

It is a 680 MW run-of-river hydropower project in the Dibang Valley district of Arunachal Pradesh.
The project envisages an 85-metre concrete gravity dam across the Tangon (Talo) river, along with a 7.955 km head race tunnel, a 93-metre surge shaft, and twin pressure shafts.
The underground powerhouse will be equipped with four 170 MW Francis turbines, while a tailrace tunnel will discharge water back into the river.
It is expected to generate around 2,728 million units annually.
The project was initially conceived by Attunli Hydro Electric Power Company Limited, a joint venture of Jindal Power and the Hydro Power Development Corporation of Arunachal Pradesh, before being allotted to Satluj Jal Vidyut Nigam (SJVN).
- SJVN is a collaborative venture between the government of India and the state government of Himachal Pradesh.

News: PBD

Attunli Hydroelectric Project FAQs

Q1: Where is the Attunli Hydroelectric Project located?

Ans: It is located in Dibang Valley district of Arunachal Pradesh.

Q2: What is the installed capacity of the Attunli Hydroelectric Project?

Ans: The project has an installed capacity of 680 MW.

Q3: What type of hydropower project is the Attunli Hydroelectric Project?

Ans: It is a run-of-river hydropower project.

Q4: Which river will the Attunli Hydroelectric Project be constructed across?

Ans: It will be constructed across the Tangon (Talo) River.

Liocheles gracilipalpus

September 1, 2026

Liocheles gracilipalpus Latest News

A team of researchers recently discovered and formally described a new species of scorpion named liocheles gracilipalpus from the Shivalik Hills of Reasi district in Jammu and Kashmir.

About Liocheles gracilipalpus

It is a new species of scorpion belonging to the Hormuridae family.
It was discovered from the Shivalik Hills of the Reasi district in Jammu and Kashmir at an elevation of 1,655 metres above sea level.
The name Liocheles gracilipalpus refers directly to its distinctive anatomy, with ‘’gracilis’’ meaning ‘’slender’’ and palpus referring to the pedipalp.
It had unusually long and slender pedipalps — the pincer-like appendages characteristic of scorpions.
It is relatively large for its genus, measuring between 34.8 and 43.2 mm in total length.
Its body ranges from greyish brown to dark brown, while the legs and tail are lighter in colour.
The researchers also observed marked sexual dimorphism, with differences between males and females particularly evident in the structure of the pedipalps.
It was found beneath flat rocks near a man-made wall at the type locality.
The species appeared to be relatively abundant there and was recorded across an elevation range extending from 1,655 metres down to Reasi town, located at around 600 metres.
Interestingly, the scorpion was not restricted to undisturbed natural habitats. Researchers observed individuals in human-inhabited areas, including wood-storage sheds.
Before the latest finding, L. australasiae, L. nigripes and L. schalleri were among the species of the genus recorded from India.

News: TRIB

Liocheles gracilipalpus FAQs

Q1: What is Liocheles gracilipalpus?

Ans: It is a newly discovered species of scorpion belonging to the Hormuridae family.

Q2: Where was Liocheles gracilipalpus discovered?

Ans: It was discovered in the Shivalik Hills of Reasi district, Jammu and Kashmir.

Q3: What is the distinctive anatomical feature of Liocheles gracilipalpus?

Ans: It has unusually long and slender pedipalps.

Q4: What is the body colour of Liocheles gracilipalpus?

Ans: Its body ranges from greyish brown to dark brown, while its legs and tail are lighter.

Sharp Tailed Sandpiper

September 1, 2026

Sharp Tailed Sandpiper Latest News

Recently, a rare sharp-tailed sandpiper was spotted in Chandu village, Gurgaon.

About Sharp Tailed Sandpiper

The sharp-tailed sandpiper (Calidris acuminata ) is a small wader bird.
Appearance
- It is a medium-sized sandpiper with a distinct cap.
- Breeding adults are heavily marked with chevrons and spots on the underparts and have a rich chestnut cap and white eye-ring.
- Nonbreeding adults are duller grayish-brown with a drab brown cap.
Habitat: It is found in freshwater marshes and coastal mudflats, sometimes inland.
Breeding: It breeds in northern Siberia, in an area that extends from the Lena river delta on the eastern Arctic Ocean southeastward to the Kolyma region.
It migrates south over East Asia to its main non-breeding grounds in Australia and New Zealand.
Diet: It feeds on seeds, worms, molluscs, crustaceans, and insects after rainfall, and often forages in agricultural pastures and in the shallow-water edges of wetlands.
Threats: Pollution, altered sediment flows, and rise in sea levels are major reasons for its population decline.
Conservation Status
- IUCN Red List: Vulnerable

Source: TOI

Sharp Tailed Sandpiper FAQs

Q1: What is the scientific name of Sharp-tailed Sandpiper?

Ans: Calidris acuminata

Q2: What is the IUCN status of Sharp-tailed Sandpiper?

Ans: Vulnerable

Germany

September 1, 2026

Germany Latest News

India and Germany are holding the 4th Indo-German Environment Forum, themed 'Together For More Resilience' in New Delhi.

About Germany

Location: It is located in central Europe.
Bordering Countries: It shares its land border with Denmark (North), Poland and Czech Republic (East), Austria and Switzerland (South), and France, Luxemburg, Belgium and Netherlands (West).
Maritime Border: It is bounded by the North Sea in the northwest and by the Baltic Sea in the northeast.
Capital City: Berlin

Geographical Features of Germany

Climate: It is favored with a generally temperate climate.
Major mountain Ranges: Alps & Bavarian highlands
Major River: The most substantial rivers in Germany are the Rhine, the Elbe, and the Danube.
Lake: Lake Constance is the largest freshwater lake, bordering Germany, Austria, and Switzerland.
Natural Resources: It majorly consists of lignite, coal, natural gas, iron ore, copper, nickel, potash, uranium.

Source: PIB

Germany FAQ's

Q1: What is the capital of Germany ?

Ans: Berlin

Q2: Germany borders with how many countries?

Ans: It shares border with 9 countries namely Denmark Poland, Czech Republic Austria, Switzerland, France, Luxemburg, Belgium and Netherlands.

Tetragonula nagalandensis

September 1, 2026

Tetragonula nagalandensis Latest News

Recently, scientists have discovered a new species of stingless honey bee and named it Tetragonula nagalandensis.

About Tetragonula nagalandensis

It is a species of stingless honey bee discovered in Nagaland.
The name nagalandensis was chosen as a tribute to the state of Nagaland, where the bee was first discovered in the Medziphema region.
It brings the total number of known stingless bee species in the country to 19.
Their unique reproductive anatomy provides the fingerprint needed for identification.
Characteristics
- Morphology: Under a microscope, the researchers found distinct differences in the male's underside and reproductive organs, specifically a C-shaped notch and a sharply curved penis valve.
- It is notably smaller, with a body length of about 5 millimetres.
- Unlike common honey bees that build hives in trees or buildings, these bees are subterranean, living under the soil.
- Its home is also unique; as it builds compact clusters of brood cells protected by several thin layers of wax and organic material to survive the damp, underground environment.
Ecological Role: Stingless bees are vital pollinators for local crops and wild vegetation.

Source: RM

Tetragonula nagalandensis FAQs

Q1: What is Tetragonula nagalandensis ?

Ans: Stingless honey bee

Q2: Where did researchers discover Tetragonula nagalandensis?

Ans: Nagaland

Ramon Magsaysay Award

September 1, 2026

Ramon Magsaysay Award Latest News

Recently, Singaporean lawyer and diplomat Tommy Koh, Myanmar activist Bo Kyi and Bangladeshi social worker Runa Khan have been named winners of this year’s Ramon Magsaysay Awards.

About Ramon Magsaysay Award

It is Asia’s premier prize and highest honor, celebrates greatness of spirit and transformative leadership in Asia.
It was first given in 1958 and named after former Philippine president Ramon Magsaysay.
It is presented in formal ceremonies in Manila, Philippines on August 31st.
Selection: The Awardees, annually selected by the RMAF board of trustees, are presented with a certificate and a medallion with an embossed image of Ramon Magsaysay facing right in profile.
From 1958 to 2008, the Award was given in six categories annually:
- Government Service: To recognize outstanding service in the public interest in any branch of government, including the executive, judicial, legislative, or military;
- Public Service: To recognize outstanding service for the public good by a private citizen;
- Community Leadership: To recognize leadership of a community toward helping the disadvantaged have fuller opportunities and a better life;
- Journalism, Literature, and Creative Communication Arts: To recognize effective writing, publishing, or photography or the use of radio, television, cinema, or the performing arts as a power for the public good;
- Peace and International Understanding: To recognize contributions to the advancement of friendship, tolerance, peace, and solidarity as the foundations for sustainable development within and across countries.
- Emergent Leadership: To recognize an individual, forty years of age or younger, for outstanding work on issues of social change in his or her community, but whose leadership may not yet be broadly recognized outside of this community.
The category of Emergent Leadership was inaugurated in 2000 and is supported by a grant from the Ford Foundation.
Starting in 2009, the Ramon Magsaysay Award is no longer being given in fixed Award categories, except for Emergent Leadership.
The winners are presented with a certificate and a medallion with an embossed image of Ramon Magsaysay.

Source: TH

Ramon Magsaysay Award FAQs

Q1: Ramon Magsaysay award established in which year?

Ans: 1957

Q2: Who is the first ever Ramon Magsaysay Award winner from India?

Ans: Vinoba Bhave

AstroRad

September 1, 2026

AstroRad Latest News

An Israeli company named StemRad has, along with Lockheed Martin, recently developed a vest called AstroRad for spaceflight.

About AstroRad

It is a wearable, radiation-shielding vest designed for space travel by the Israeli company named StemRad, with support from the Israel Space Agency and Lockheed Martin.
It protects astronauts' vital organs from dangerous space radiation beyond low-Earth orbit (LEO).
It reduces Radiation Exposure Induced Death (REID) while eliminating the possibility of Acute Radiation Syndrome (ARS) due to solar particle events.

AstroRad Features

The AstroRad uses a proprietary smart shielding design to selectively protect those organs and tissues which are most sensitive to radiation in terms of REID probability.
This approach provides the greatest biological impact of protection with the least amount of mass.
Tissue-weighting factors are assigned to organs and tissues in the body to reflect the variance in radiation sensitivity, with organs such as the lungs, bone marrow, colon, stomach, breasts, and ovaries being among the most sensitive.
Selective protection of these organs, and tissue-resident stem cell concentrations within them was accomplished by designing variable shielding thickness to complement the body’s own shielding.
The shielding in the AstroRad comprises a polymer with a high abundance of hydrogen, which is advantageous for shielding against space radiation because it minimizes the generation of secondary radiation.
Individual solid shielding elements are organized into a scale-like architecture to allow for uninhibited, comfortable movement of the astronauts while wearing the AstroRad.

News: TH

AstroRad FAQs

Q1: What is AstroRad?

Ans: AstroRad is a wearable, radiation-shielding vest designed to protect astronauts during space travel.

Q2: Which company developed AstroRad?

Ans: AstroRad was developed by the Israeli company StemRad.

Q3: What is the primary purpose of AstroRad?

Ans: Its primary purpose is to protect astronauts' vital organs from dangerous space radiation beyond low-Earth orbit (LEO).

Q4: What is the key principle behind AstroRad's smart shielding design?

Ans: It selectively protects radiation-sensitive organs and tissues while minimizing the overall mass of the shielding.

Coral Bleaching

September 1, 2026

Coral Bleaching Latest News

Recently, the seventh Status of Coral Reefs of the World report by the Global Coral Reef Monitoring Network (GCRMN) said that Coral bleaching events are becoming more frequent and recovery periods have shortened dramatically.

About Coral Bleaching

It occurs when corals experience stress in their environment due to changes in temperature, pollution or high levels of ocean acidity.
Process of Coral Bleaching
- 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 expose their pale white exoskeleton, giving the corals a bleached appearance.
- This also ends the symbiotic relationship that helps the corals to survive and grow.

What Causes Coral Bleaching?

Change in Ocean Temperature: Increased Ocean temperature caused by climate change is the leading cause of coral bleaching.
Runoff and Pollution: Storm generated precipitation can rapidly dilute ocean water and runoff can carry pollutants, which can bleach near shore corals.
Overexposure to sunlight: When temperatures are high, high solar irradiance contributes to bleaching in shallow water corals.
Extremely low tides: Exposure to the air during extremely low tides can cause bleaching in shallow corals.

What are Corals?

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.
Corals share a symbiotic relationship with single-celled algae called zooxanthellae.
The algae provide 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.

Source: DTE

Coral Bleaching FAQs

Q1: What is Coral Bleaching?

Ans: It is the expulsion of zooxanthellae Symbiodinium algae due to heat stress, coral turns white.

Q2: What are the major Indian Coral reef regions?

Ans: Gulf of Mannar, Gulf of Kutch, Lakshadweep, Andaman & Nicobar