Navigation Links
Earliest animals lived in a lake environment, research shows
Date:7/27/2009

RIVERSIDE, Calif. Evidence for life on Earth stretches back billions of years, with simple single-celled organisms like bacteria dominating the record. When multi-celled animal life appeared on the planet after 3 billion years of single cell organisms, animals diversified rapidly.

Conventional wisdom has it that animal evolution began in the ocean, with animal life adapting much later in Earth history to terrestrial environments.

Now a UC Riverside-led team of researchers studying ancient rock samples in South China has found that the first animal fossils in the paleontological record are preserved in ancient lake deposits, not marine sediments as commonly assumed.

"We know that life in the oceans is very different from life in lakes, and, at least in the modern world, the oceans are far more stable and consistent environments compared to lakes which tend to be short-lived features relative to, say, rates of evolution," said Martin Kennedy, a professor of geology in the Department of Earth Sciences who participated in the research. "Thus it is surprising that the first evidence of animals we find is associated with lakes, a far more variable environment than the ocean."

The study, published in the July 27-31 online edition of the Proceedings of the National Academy of Sciences, raises questions such as what aspects of the Earth's environment changed to enable animal evolution.

In their research, the authors focused on South China's Doushantuo Formation, one of the oldest fossil beds that houses highly preserved fossils dated to about 600 million years ago. These beds have no adult fossils. Instead, many of the fossils appear as bundles of cells interpreted to be animal embryos.

"Our first unusual finding in this region was the abundance of a clay mineral called smectite," said lead author '/>"/>

Contact: Iqbal Pittalwala
iqbal@ucr.edu
951-827-6050
University of California - Riverside
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. The life histories of the earliest land animals
2. New research reveals the earliest evidence for corn in the New World
3. Researchers find the earliest evidence of domesticated maize
4. Evidence of earliest known domestic horses found in Kazakhstan
5. Engineering technology pinpoints earliest signs of animal life
6. Earliest animal footprints ever found -- discovered in Nevada
7. Researchers devise means to create blood by identifying earliest stem cells
8. More acidic ocean could spell trouble for marine lifes earliest stages
9. Scientists confirm that parts of earliest genetic material may have come from the stars
10. Warmer environment means shorter lives for cold-blooded animals
11. Researchers shed light on trading behavior in animals -- and humans
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Earliest animals lived in a lake environment, research shows
(Date:8/18/2015)... , Aug. 18, 2015  Navitas today ... contributor to the Submission Content Management webinar ... a non-profit forum. Dedicated to the Implementation of ... neutral platform for industry, vendors, health authorities, ... and work towards a standard method of ...
(Date:8/12/2015)... , Aug. 12, 2015   MedNet Solutions ... the entire spectrum of clinical research, is proud to ... the company,s comprehensive SaaS-based eClinical technology platform, has led ... the first two quarters of 2015.   Q2 2015 ... largest quarters measured by contract value sold in the ...
(Date:8/12/2015)... SAN JOSE, Calif. , Aug. 12, 2015 ... leading developer of human interface solutions, today announced ... the recently announced Match-in-Sensor solution, have officially been ... (FIDO) Alliance. As part of the certification, Synaptics, ... the FIDO 1.0 Universal Authentication Framework (UAF) standard ...
Breaking Biology News(10 mins):Navitas, a Key Contributor in IRISS Forum Webinar 2Navitas, a Key Contributor in IRISS Forum Webinar 3MedNet Solutions Experiences Explosive Corporate Growth 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 2Synaptics Announces FIDO Certification of Natural ID Fingerprint Solutions 3
... This release is available in German . ... in many animal species. During mating season male testosterone ... and masculine features. Male bonobos, however, invest much more ... levels would collide with this increased tendency towards forming ...
... PROVIDENCE, R.I. [Brown University] For the 26 million ... way to check glucose levels. It is invasive and ... working on a new sensor that can check blood ... The technique takes advantage of a convergence of ...
... Spanish . There are some jobs ("dirty ... a certain amount of social rejection towards the people who ... to moral conflicts and ethical decisions related to performing those ... perspective, as in the case of a police officer who ...
Cached Biology News:Bonobos' unusual success story 2Biochip measures glucose in saliva, not blood 2Biochip measures glucose in saliva, not blood 3Moral imagination as a key to overcoming work-related stigmas 2
(Date:8/27/2015)... ON , Aug. 27, 2015 /PRNewswire/ - BIOREM Inc. (TSXV: ... three and six-month periods ended June 30, 2015. Biorem,s complete second ... www.sedar.com ). FINANCIAL HIGHLIGHTS: in ,000,s except earnings per shareThree-months ... , 2014 , 2015 , 2014 ... 9,398 , 4,433 Gross profit , 1,656 ...
(Date:8/27/2015)... 27, 2015 In response to recent ... and The US Postal Service to no longer ... ,select agents, by the CDC, Marken reaffirmed today ... sensitive shipments. Marken uses its flexible ... and certified personnel to ensure the safe and ...
(Date:8/26/2015)... MO (PRWEB) , ... August 26, 2015 , ... ... it is increasing its investment in the development and manufacture of highly valued ... The company’s scientific team's extensive expertise with protein chemistry has led to ...
(Date:8/26/2015)... , Aug. 26, 2015 China Cord ... China,s leading provider of cord blood ... cell storage services, today announced that the Company has ... ("MO2"), an entity wholly owned by Mr. Yuen Kam, ... has acquired the outstanding shares (the "Shares") of  Excellent ...
Breaking Biology Technology:BIOREM Reports $718,000 Net Earnings for the Second Quarter 2BIOREM Reports $718,000 Net Earnings for the Second Quarter 3Marken Ensures Safe Transportation Of Select Agents And Toxins 2Lee Biosolutions Announces Increased Investment in the Development and Manufacturing of Biomarkers Used in Early Detection Of Heart Disease 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 2China Cord Blood Corporation Receives Notice of Transactions Regarding its 7% Senior Convertible Notes Due 2017 3
... WASHINGTON, June 11 Syngenta today ... to add an innovative antitoxin crop protection technology to the ... which is aimed at reducing aflatoxin, a toxin that can ... heat and drought stress. , , "The acquisition ...
... PharmaNet Development Group, Inc., a leading provider of clinical development services ... its participation at several international professional meetings during the month of June. ... 45th Drug Information Association (DIA) Annual Meeting, ... 321, ...
... Study to Evaluate FDA-Approved Topical Anesthetic Pretreatment , ... Inc. (Nasdaq: NGSX ) announced today that ... its proposed study to evaluate Qutenza(TM) in patients with ... anesthetic. As part of its ongoing new drug application ...
Cached Biology Technology:Syngenta Acquires Innovative Bio-Control Technology to Improve Usable Crop Yields 2Syngenta Acquires Innovative Bio-Control Technology to Improve Usable Crop Yields 3PharmaNet Development Group Clinical Research Experts to Present at Global Professional Meetings in June 2NeurogesX Provides U.S. Regulatory Update for Qutenza(TM) 2NeurogesX Provides U.S. Regulatory Update for Qutenza(TM) 3NeurogesX Provides U.S. Regulatory Update for Qutenza(TM) 4
... microarrays are derived from frozen embedded tissue ... control procedures to ensure the highest quality. ... in one block, sectioned at a thickness ... slides. Sections are large (3-5 mm in ...
... tissue microarrays are derived from Paraffin embedded ... quality control procedures to ensure the highest ... assembled in one block, sectioned at a ... coated slides. Sections are large (3-5 mm ...
... 2-D standards consist of seven reduced, denatured ... carbonic anhydrase, rabbit muscle GAPDH, bovine muscle ... with pIs ranging from 4.5 to 8.5 ... 76,000. These 2-D standards provide calibrated references ...
The PROTEAN II xi multi-cell 2-D conversion kit converts the PROTEAN II xi multi-cell to the PROTEAN II XL multi-cell for a wider format cell that accepts 17 to 18 cm IPG strips....
Biology Products: