• Education
    • Higher Education
    • Scholarships & Grants
    • Online Learning
    • School Reforms
    • Research & Innovation
  • Lifestyle
    • Travel
    • Food & Drink
    • Fashion & Beauty
    • Home & Living
    • Relationships & Family
  • Technology & Startups
    • Software & Apps
    • Startup Success Stories
    • Startups & Innovations
    • Tech Regulations
    • Venture Capital
    • Artificial Intelligence
    • Cybersecurity
    • Emerging Technologies
    • Gadgets & Devices
    • Industry Analysis
  • About us
  • Contact
  • Advertise with Us
  • Privacy & Policy
Today Headline
  • Home
  • World News
    • Us & Canada
    • Europe
    • Asia
    • Africa
    • Middle East
  • Politics
    • Elections
    • Political Parties
    • Government Policies
    • International Relations
    • Legislative News
  • Business & Finance
    • Market Trends
    • Stock Market
    • Entrepreneurship
    • Corporate News
    • Economic Policies
  • Science & Environment
    • Space Exploration
    • Climate Change
    • Wildlife & Conservation
    • Environmental Policies
    • Medical Research
  • Health
    • Public Health
    • Mental Health
    • Medical Breakthroughs
    • Fitness & Nutrition
    • Pandemic Updates
  • Sports
    • Football
    • Basketball
    • Tennis
    • Olympics
    • Motorsport
  • Entertainment
    • Movies
    • Music
    • TV & Streaming
    • Celebrity News
    • Awards & Festivals
  • Crime & Justice
    • Court Cases
    • Cybercrime
    • Policing
    • Criminal Investigations
    • Legal Reforms
No Result
View All Result
  • Home
  • World News
    • Us & Canada
    • Europe
    • Asia
    • Africa
    • Middle East
  • Politics
    • Elections
    • Political Parties
    • Government Policies
    • International Relations
    • Legislative News
  • Business & Finance
    • Market Trends
    • Stock Market
    • Entrepreneurship
    • Corporate News
    • Economic Policies
  • Science & Environment
    • Space Exploration
    • Climate Change
    • Wildlife & Conservation
    • Environmental Policies
    • Medical Research
  • Health
    • Public Health
    • Mental Health
    • Medical Breakthroughs
    • Fitness & Nutrition
    • Pandemic Updates
  • Sports
    • Football
    • Basketball
    • Tennis
    • Olympics
    • Motorsport
  • Entertainment
    • Movies
    • Music
    • TV & Streaming
    • Celebrity News
    • Awards & Festivals
  • Crime & Justice
    • Court Cases
    • Cybercrime
    • Policing
    • Criminal Investigations
    • Legal Reforms
No Result
View All Result
Today Headline
No Result
View All Result
Home Science & Environment

Penguins Help to Map Antarctica’s Growing Mercury Threat todayheadline

February 12, 2025
in Science & Environment
Reading Time: 3 mins read
A A
0
Gentoo penguin
5
SHARES
11
VIEWS
Share on FacebookShare on Twitter


February 12, 2025

2 min read

Penguins Help to Map Antarctica’s Growing Mercury Threat

Molted penguin feathers record mercury infiltrating Antarctica’s food web

By Gayoung Lee edited by Sarah Lewin Frasier

Gentoo penguins have a wide geographic range, making them good targets for follow-up research.

David Merron Photography/Getty Images

When Philip Sontag first visited Antarctica as a Ph.D. student, he brought back an unusual souvenir: a huge bag of penguin feathers. And now, after a decade-long analysis, Sontag and his colleagues have figured out how to use such feathers to create a living map of the mercury contamination that increasingly threatens Southern Hemisphere wildlife.

Mercury is a common by-product of gold mining, a growing industry in several southern countries. The toxic metal accumulates as it moves up the food chain by binding with amino acids in animals and then infiltrating their central nervous systems, where it can inhibit neural growth. Tracking mercury exposure is crucial for monitoring an ecosystem—but merely sampling rocks, ice or soil for its presence tells little about how much is actually entering the food web.

Many predators, including penguins, have evolved ways to dispose of mercury. The chemical builds up in feathers that the birds regularly molt in large quantities. Sontag, now a polar researcher based at Rutgers University, and his colleagues hoped to use molted feathers to determine where penguins picked up the toxic substance. The scientists were surprised to find a very clear correlation between the feathers’ levels of mercury and of a carbon isotope called carbon-13; the latter varies based on geographic location and thus acts as an indicator of “where the penguins are feeding or where their breeding grounds are,” Sontag says. These findings, published in Science of the Total Environment, confirmed this connection in seven penguin species scattered across the Southern Ocean—a pattern suggesting they’re exposed to more mercury farther north, where the comparatively warmer environment leads to higher carbon-13 levels.


On supporting science journalism

If you’re enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


These findings suggest that penguins could function as mercury bioindicators: living trackers of environmental pollutants, says the study’s senior author John Reinfelder, a marine biologist at Rutgers. Rather than measuring the chemical itself in a snapshot of time and place, he says, measuring penguin feathers’ mercury levels tracks the substance’s movement through the oceanic food web. For instance, penguin species known to reside near one another had varying mercury and carbon-13 levels because of their different migration and feeding patterns. These data could be modeled into a maplike database to help guide future projects on conservation and polar science research.

Scientists consider penguins promising candidates for such bioindicators, says marine scientist Míriam Gimeno Castells, a Ph.D. student at the Institute of Marine Science from the Spanish National Research Council, who was not involved in the study. The animals are midway through the food chain. They breed in colonies, so researchers can easily scoop up feathers from many different individuals. Additionally, every breeding season they undergo dramatic molts; the feathers they lose “will contain the mercury that has accumulated during the nonbreeding season,” Gimeno Castells says.

Sontag’s next steps are to collect newer feathers to experiment with, across different species, and to measure mercury in penguins’ blood and prey to compare with levels of the substance in their feathers.

And how are the penguins themselves doing with their current mercury levels? “We don’t believe penguins have been exposed to toxic levels as of yet,” Reinfelder says. “Yes, the penguins will be okay.”

Previous Post

U.S. Air Force extends Sierra Space contract for upper stage rocket engine

Next Post

NJ Republicans push state to restore $150 million in aid to towns todayheadline

Related Posts

Can AI understand a flower without being able to touch or smell?

Can AI understand a flower without being able to touch or smell? todayheadline

June 4, 2025
5

Sierra Space Wins NASA Contract to Advance Lunar Logistics Solutions

June 4, 2025
5
Next Post
NJ Republicans push state to restore $150 million in aid to towns

NJ Republicans push state to restore $150 million in aid to towns todayheadline

  • Trending
  • Comments
  • Latest
Family calls for change after B.C. nurse dies by suicide after attacks on the job

Family calls for change after B.C. nurse dies by suicide after attacks on the job

April 2, 2025
Pioneering 3D printing project shares successes

Product reduces TPH levels to non-hazardous status

November 27, 2024

Hospital Mergers Fail to Deliver Better Care or Lower Costs, Study Finds todayheadline

December 31, 2024

Police ID man who died after Corso Italia fight

December 23, 2024
Harris tells supporters 'never give up' and urges peaceful transfer of power

Harris tells supporters ‘never give up’ and urges peaceful transfer of power

0
Des Moines Man Accused Of Shooting Ex-Girlfriend's Mother

Des Moines Man Accused Of Shooting Ex-Girlfriend’s Mother

0

Trump ‘looks forward’ to White House meeting with Biden

0
Catholic voters were critical to Donald Trump’s blowout victory: ‘Harris snubbed us’

Catholic voters were critical to Donald Trump’s blowout victory: ‘Harris snubbed us’

0
Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

June 4, 2025
Air Haifa broadens reach with direct Rhodes flights

Air Haifa broadens reach with direct Rhodes flights

June 4, 2025

Coco Gauff bests Madison Keys to return to French Open semis todayheadline

June 4, 2025
Longtime coach Kevin Boyle to leave Montverde Academy

2025 NBA draft big board rankings: Top 100 prospects todayheadline

June 4, 2025

Recent News

Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

June 4, 2025
3
Air Haifa broadens reach with direct Rhodes flights

Air Haifa broadens reach with direct Rhodes flights

June 4, 2025
5

Coco Gauff bests Madison Keys to return to French Open semis todayheadline

June 4, 2025
4
Longtime coach Kevin Boyle to leave Montverde Academy

2025 NBA draft big board rankings: Top 100 prospects todayheadline

June 4, 2025
4

TodayHeadline is a dynamic news website dedicated to delivering up-to-date and comprehensive news coverage from around the globe.

Follow Us

Browse by Category

  • Africa
  • Asia
  • Basketball
  • Business & Finance
  • Climate Change
  • Crime & Justice
  • Cybersecurity
  • Economic Policies
  • Elections
  • Entertainment
  • Entrepreneurship
  • Environmental Policies
  • Europe
  • Football
  • Gadgets & Devices
  • Health
  • Medical Research
  • Mental Health
  • Middle East
  • Motorsport
  • Olympics
  • Politics
  • Public Health
  • Relationships & Family
  • Science & Environment
  • Software & Apps
  • Space Exploration
  • Sports
  • Stock Market
  • Technology & Startups
  • Tennis
  • Travel
  • Uncategorized
  • Us & Canada
  • Wildlife & Conservation
  • World News

Recent News

Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

Ford, Hyundai post higher U.S. sales in May on strong SUV, truck demand

June 4, 2025
Air Haifa broadens reach with direct Rhodes flights

Air Haifa broadens reach with direct Rhodes flights

June 4, 2025
  • Education
  • Lifestyle
  • Technology & Startups
  • About us
  • Contact
  • Advertise with Us
  • Privacy & Policy

© 2024 Todayheadline.co

Welcome Back!

OR

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Business & Finance
  • Corporate News
  • Economic Policies
  • Entrepreneurship
  • Market Trends
  • Crime & Justice
  • Court Cases
  • Criminal Investigations
  • Cybercrime
  • Legal Reforms
  • Policing
  • Education
  • Higher Education
  • Online Learning
  • Entertainment
  • Awards & Festivals
  • Celebrity News
  • Movies
  • Music
  • Health
  • Fitness & Nutrition
  • Medical Breakthroughs
  • Mental Health
  • Pandemic Updates
  • Lifestyle
  • Fashion & Beauty
  • Food & Drink
  • Home & Living
  • Politics
  • Elections
  • Government Policies
  • International Relations
  • Legislative News
  • Political Parties
  • Africa
  • Asia
  • Europe
  • Middle East
  • Artificial Intelligence
  • Cybersecurity
  • Emerging Technologies
  • Gadgets & Devices
  • Industry Analysis
  • Basketball
  • Football
  • Motorsport
  • Olympics
  • Climate Change
  • Environmental Policies
  • Medical Research
  • Science & Environment
  • Space Exploration
  • Wildlife & Conservation
  • Sports
  • Tennis
  • Technology & Startups
  • Software & Apps
  • Startup Success Stories
  • Startups & Innovations
  • Tech Regulations
  • Venture Capital
  • Uncategorized
  • World News
  • Us & Canada
  • Public Health
  • Relationships & Family
  • Travel
  • Research & Innovation
  • Scholarships & Grants
  • School Reforms
  • Stock Market
  • TV & Streaming
  • Advertise with Us
  • Privacy & Policy
  • About us
  • Contact

© 2024 Todayheadline.co