* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Sunday, June 1, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Mavs CEO holds firm on new arena, entertainment district in Dallas – Dallas News

    Mavs CEO Stands Strong on Vision for New Arena and Entertainment District in Dallas

    Entertainment: On Your Marks, Get Set, Beer Run! – Urban Milwaukee

    Get Ready to Race: The Ultimate Beer Run Experience Awaits!

    Rachel Guttman Launches Entertainment Law Firm Gutt Law, PLLC [Exclusive] – MusicRow.com

    Rachel Guttman Unveils Exciting New Entertainment Law Firm: Gutt Law, PLLC!

    HYBE Cashes In: Offloads Final Stake in K-Pop Rival SM Entertainment for $177 Million!

    Allied Gaming & Entertainment Receives Expected Nasdaq Notice Regarding Delayed Quarterly Report – Business Wire

    Allied Gaming & Entertainment Faces Nasdaq Notice Over Delayed Quarterly Report

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Drone technology demo in Cambria County showcases future of lifesaving medical deliveries – local21news.com

    Revolutionizing Healthcare: Drone Technology Takes Flight for Lifesaving Medical Deliveries in Cambria County

    Revolutionary Harvesting Technology Promises to Slash CAR-T Manufacturing Costs!

    Stop the Machines: The Rise of Anti-Technology Extremism – International Centre for Counter-Terrorism – ICCT

    Unplugged: The Surge of Anti-Technology Extremism

    Finland to head EU’s quantum defense technology project – Latest news from Azerbaijan

    Finland Takes the Lead in Pioneering EU’s Quantum Defense Technology Initiative!

    i3D Robotics Unveils Breakthrough Glass Defect Detection Technology – USGlass Magazine

    Revolutionary Glass Defect Detection Technology Unveiled by i3D Robotics!

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

    Mavs CEO holds firm on new arena, entertainment district in Dallas – Dallas News

    Mavs CEO Stands Strong on Vision for New Arena and Entertainment District in Dallas

    Entertainment: On Your Marks, Get Set, Beer Run! – Urban Milwaukee

    Get Ready to Race: The Ultimate Beer Run Experience Awaits!

    Rachel Guttman Launches Entertainment Law Firm Gutt Law, PLLC [Exclusive] – MusicRow.com

    Rachel Guttman Unveils Exciting New Entertainment Law Firm: Gutt Law, PLLC!

    HYBE Cashes In: Offloads Final Stake in K-Pop Rival SM Entertainment for $177 Million!

    Allied Gaming & Entertainment Receives Expected Nasdaq Notice Regarding Delayed Quarterly Report – Business Wire

    Allied Gaming & Entertainment Faces Nasdaq Notice Over Delayed Quarterly Report

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

    Drone technology demo in Cambria County showcases future of lifesaving medical deliveries – local21news.com

    Revolutionizing Healthcare: Drone Technology Takes Flight for Lifesaving Medical Deliveries in Cambria County

    Revolutionary Harvesting Technology Promises to Slash CAR-T Manufacturing Costs!

    Stop the Machines: The Rise of Anti-Technology Extremism – International Centre for Counter-Terrorism – ICCT

    Unplugged: The Surge of Anti-Technology Extremism

    Finland to head EU’s quantum defense technology project – Latest news from Azerbaijan

    Finland Takes the Lead in Pioneering EU’s Quantum Defense Technology Initiative!

    i3D Robotics Unveils Breakthrough Glass Defect Detection Technology – USGlass Magazine

    Revolutionary Glass Defect Detection Technology Unveiled by i3D Robotics!

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

Ammonites Were Not in Decline Prior to End-Cretaceous Extinction, New Study Suggests

June 29, 2024
in Science
Ammonites Were Not in Decline Prior to End-Cretaceous Extinction, New Study Suggests
Share on FacebookShare on Twitter

A team of paleontologists from the United Kingdom and the United States has analyzed the fossil record of ammonites — marine mollusks often distinguished by their coiled shells — through the Late Cretaceous epoch (100.5 to 66 million years ago), characterized by some scientists as an interval of decline prior to their total extinction at the Cretaceous-Paleogene boundary. Their results show that instead of fizzling out ahead of their extinction, ammonoids were still going strong across the globe in the Late Cretaceous.

Ammonites basking under the Late Cretaceous Sun. Image credit: Callum Pursall.

Ammonites basking under the Late Cretaceous Sun. Image credit: Callum Pursall.

Ammonoids flourished in Earth’s oceans for more than 350 million years until they died out during the same chance event that wiped out the dinosaurs 66 million years ago.

Some paleontologists have argued that their demise was inevitable and that the diversity of ammonites (the last major lineage of ammonoids) was decreasing long before they went extinct at the end of the Cretaceous period.

However, the new study shows that their fate was not set in stone; instead, the final chapter in ammonite evolutionary history is more complex.

“Understanding how and why biodiversity has changed through time is very challenging,” said Dr. Joseph Flannery-Sutherland, a paleontologist at the University of Birmingham and the University of Bristol.

“The fossil record tells us some of the story, but it is often an unreliable narrator.”

“Patterns of diversity can just reflect patterns of sampling, essentially where and when we have found new fossil species, rather than actual biological history.”

“Analyzing the existing Late Cretaceous ammonite fossil record as though it were the complete, global story is probably why previous researchers have thought they were in long-term ecological decline.”

To overcome this issue, Dr. Flannery-Sutherland and his colleagues assembled a new database of Late Cretaceous ammonite fossils to help fill in the sampling gaps in their record.

“We drew on museum collections to provide new sources of specimens rather than just relying on what had already been published,” said Cameron Crossan, a researcher at the University of Bristol.

“This way we could be sure that we were getting a more accurate picture of their biodiversity prior to their total extinction.”

Using their database, the paleontologists then analyzed how ammonite speciation and extinction rates varied in different parts of the globe.

If ammonites were in decline through the Late Cretaceous, then their extinction rates would have been generally higher than their speciation rates wherever the team looked.

What the researchers instead found was that the balance of speciation and extinction changed both through geological time and between different geographic regions.

“These differences in ammonoid diversification around the world are a crucial part of why their Late Cretaceous story has been misunderstood,” said Dr. James Witts, a paleontologist at the Natural History Museum, London.

“Their fossil record in parts of North America is very well sampled, but if you looked at this alone then you might think that they were struggling, while they were actually flourishing in other regions.”

“Their extinction really was a chance event and not an inevitable outcome.”

To find out what was responsible for the continued success of ammonites through the Late Cretaceous, the scientists looked at potential factors might have caused their diversity to change through time.

They were particularly interested in whether their speciation and extinction rates were driven mainly by environmental conditions like ocean temperature and sea level, or by biological processes like pressure from predators and competition between ammonites themselves.

“What we found was that the causes of ammonite speciation and extinction were as geographically varied as the rates themselves,” said Dr. Corinne Myers, a paleontologist at the University of New Mexico.

“You couldn’t just look at their total fossil record and say that their diversity was driven entirely by changing temperature, for example.”

“It was more complex than that and depended on where in the world they were living.”

The team’s results appear in the journal Nature Communications.

_____

J.T. Flannery-Sutherland et al. 2024. Late Cretaceous ammonoids show that drivers of diversification are regionally heterogeneous. Nat Commun 15, 5382; doi: 10.1038/s41467-024-49462-z

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Breaking Science News – https://www.sci.news/paleontology/ammonites-end-cretaceous-extinction-13056.html

Tags: AmmonitesDecline’science
Previous Post

NASA Release 3D Visualization of ‘Pillars of Creation’

Next Post

Eyed Needles Were Invented around 40,000 Years Ago in Eastern Eurasia, Archaeologists Say

Upgrades coming to ecological park in Sunbury – WNEP

Upgrades coming to ecological park in Sunbury – WNEP

June 1, 2025
This will ‘devastate scientific research’: 16 states sue the Trump administration over National Science Foundation directive – CNN

This will ‘devastate scientific research’: 16 states sue the Trump administration over National Science Foundation directive – CNN

June 1, 2025
Trump’s new ‘gold standard’ rule will destroy American science as we know it | Colette Delawalla – The Guardian

Trump’s Controversial ‘Gold Standard’ Rule: A Threat to the Future of American Science

June 1, 2025
The month of pride – financialexpress.com

Celebrating Pride: A Month of Love, Acceptance, and Empowerment

June 1, 2025
Elon Musk: Five ways world’s richest man changed the White House – BBC

Elon Musk’s Impact: Five Transformative Ways the World’s Richest Man Influenced the White House

June 1, 2025
Last Week at Economy Class and Beyond (31st May) – Economy Class & Beyond –

Last Week at Economy Class and Beyond (31st May) – Economy Class & Beyond –

June 1, 2025
Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

Jackie Chan Reveals This Family Member ‘Never Watched’ The Whole Of Any Of His Movies – Yahoo

June 1, 2025
Governor Newsom proclaims Mental Health Awareness Month – Governor of California (.gov)

Governor Newsom Declares May as Mental Health Awareness Month!

June 1, 2025
Sanders says Harris fell short with working class. He has a plan to fix that. – The Washington Post

Sanders says Harris fell short with working class. He has a plan to fix that. – The Washington Post

June 1, 2025
Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

Lafayette Regional Technology Council – Tech Leadership That’s Homegrown and Future-Focused – Discover Lafayette

June 1, 2025

Categories

Archives

June 2025
MTWTFSS
 1
2345678
9101112131415
16171819202122
23242526272829
30 
« May    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (655)
  • Economy (670)
  • Entertainment (21,576)
  • General (15,254)
  • Health (9,712)
  • Lifestyle (672)
  • News (22,149)
  • People (671)
  • Politics (678)
  • Science (15,891)
  • Sports (21,174)
  • Technology (15,657)
  • World (658)

Recent News

Upgrades coming to ecological park in Sunbury – WNEP

Upgrades coming to ecological park in Sunbury – WNEP

June 1, 2025
This will ‘devastate scientific research’: 16 states sue the Trump administration over National Science Foundation directive – CNN

This will ‘devastate scientific research’: 16 states sue the Trump administration over National Science Foundation directive – CNN

June 1, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version