Subscribe to our free daily newsletters
. Earth Science News .




Subscribe to our free daily newsletters



WATER WORLD
Skeletons developed as chemistry of oceans changed
by Staff Writers
Edinburgh, UK (SPX) Apr 10, 2017


This is an artist's impression of a Suvorevella fossil, one of the oldest known skeletal macrofossils. Image courtesy Alina Konovalenko.

Skeletons and shells first came into being 550 million years ago as the chemical make-up of seawater changed, a study suggests. Ancient marine life may have developed from soft-bodied animals into creatures with hard body parts as oxygen levels rose and calcium and magnesium levels in prehistoric oceans changed, researchers say.

Until now, little was known about how skeletons and shells - which are made of calcium carbonate - first evolved, the team says.

Previous theories suggested that soft-bodied organisms had undergone a mass extinction, which allowed organisms with skeletons and shells to flourish.

However, researchers at the University of Edinburgh have found that the earliest lifeforms with hard body parts co-existed with closely related soft-bodied species.

The team examined a range of fossils unearthed from limestone rocks in Siberia, which formed millions of years ago from seawater with high levels of calcium carbonate.

They concluded that hard-bodied lifeforms were first present only in such environments where high levels of calcium carbonate allowed organisms to develop primitive hard parts.

Around 10m years later, the diversity of life of Earth increased rapidly - a period known as the Cambrian explosion - and hard-bodied life began to thrive. An increased threat from predators led lifeforms to develop new, more complex hard parts in environments that were less carbonate-rich, the team says.

The development of hard body parts - through a process called biomineralisation - marked a significant evolutionary advance from the previous world of soft-bodied life, the team says.

The study is published in the journal Proceedings of the Royal Society B. The research was carried out in collaboration with Lomonosov Moscow State University.

Professor Rachel Wood, of the University of Edinburgh's School of GeoSciences, who led the study, said: "How animals produced shells and skeletons is one of the major events in the evolution of life. We are only now starting to understand the processes underlying this revolution."

Research paper

WATER WORLD
'Zero recovery' for corals in back-to-back Australia bleaching
Sydney (AFP) April 10, 2017
Coral bleached for two consecutive years at Australia's Great Barrier Reef has "zero prospect" of recovery, scientists warned Monday, as they confirmed the site has again been hit by warming sea temperatures. Researchers said last month they were detecting another round of mass bleaching this year after a severe event in 2016, and their fears were confirmed after aerial surveys of the entire ... read more

Related Links
University of Edinburgh
Water News - Science, Technology and Politics


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

WATER WORLD
Colombia orders protection for musdlide town

Trump's visceral response prompts Syria strikes

Over 6,000 flee 'terrifying' violence in S.Sudan town: UN

After US strikes, Syria attack victims dream of Assad ouster

WATER WORLD
Despite EU fines, Greece struggling to promote recycling

Granites could solve riddle of pinpointing metals crucial for low carbon tech

Seaweed: From superfood to superconductor

More annual shareholder meetings go virtual in US

WATER WORLD
Powers of attraction could decimate deadly starfish

'Zero recovery' for corals in back-to-back Australia bleaching

Most deep-sea animals produce their own light, research shows

UBC invention uses bacteria to purify water

WATER WORLD
Permafrost more vulnerable than thought: scientists

Arctic Ocean becoming more like the Atlantic, scientists say

Microbial colonizers of Arctic soils are sensitive to future climate change

Some of Greenland's coastal ice will be permanently lost by 2100

WATER WORLD
New global report on food crisis

A step forward to making crops drought tolerant

New rice fights off drought

Domesticated rice goes rogue

WATER WORLD
Volcanic arcs form by deep melting of rock mixtures

Panic, damage as three strong quakes hit Philippines

5.1 quake kills one in El Salvador

Project Hotspot

WATER WORLD
Three killed in Mogadishu army camp attack: military

El Nino can warn on cholera outbreaks in Africa: study

Five dead in jihadist attack in Mali

Boko Haram kills eight, abducts women in NE Nigeria: sources

WATER WORLD
Putting social science modeling through its paces

Study reveals 10,000 years of genetic continuity in northwest North America

Married couples with shared ancestry tend to have similar genes

Researchers uncover prehistoric art and ornaments from Indonesian 'Ice Age'




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement