Featured Research

from universities, journals, and other organizations

Novel Evolutionary Theory For The Explosion Of Life

Date:
October 27, 2009
Source:
IBEC - Institute for Bioengineering of Catalonia
Summary:
The Cambrian Explosion is widely regarded as one of the most relevant episodes in the history of life on Earth, when the vast majority of animal phyla first appear in the fossil record. However, the causes of its origin have been object of debate for decades. A novel theory formulates that the geologically induced increase on marine calcium, as a result of volcanic activity, might be the key for understanding this important stage in evolution.

The Cambrian Explosion is widely regarded as one of the most relevant episodes in the history of life on Earth, when the vast majority of animal phyla first appear in the fossil record. However, the causes of its origin have been the subject of debate for decades, and the question of what was the trigger for the single cell microorganisms to assemble and organize into multicellular organisms has remained unanswered until now.

Within a longstanding research collaboration between the Institute for Bioengineering of Catalonia and Bielefeld University together with the Friedrich-Miescher-Institute in Basel and the Marine Biological Laboratory at Woods Hole (Massachusetts), Xavier Fernŕndez-Busquets (Barcelona) and Dario Anselmetti (Bielefeld) and their colleagues published online in the journal Molecular Biology and Evolution their biophysical single molecule results on the effect of calcium on the interactions of cell adhesion molecules from marine sponges. These simply organized organisms do not have specialized muscle or nerve cells and nevertheless survived the last 500 million years almost unchanged and are considered a link between the single-cell dominated Precambrian and later multicellular organisms.

The researchers succeeded to show that the massive and sudden surge in the calcium concentration of the Cambrian seawater -- that is believed to be the result of volcanically active midocean ridges -- not only initiated the buildup of calcified shells, but was also mandatory for the aggregation and stabilisation of multicellular sponge structures. This allows, on the other hand, to formulate a novel theory where the geologically induced increase of marine calcium might be the key for understanding the Cambrian Explosion of Life.

This paper constitutes the first research work where single molecule force spectroscopy studies have provided meaningful answers to such a deep evolutionary biology question as the origin of multicellular animals, and might represent a milestone for both disciplines and an example of how multidisciplinarity and collaboration are essential components of excellent contemporary science.


Story Source:

The above story is based on materials provided by IBEC - Institute for Bioengineering of Catalonia. Note: Materials may be edited for content and length.


Journal Reference:

  1. Xavier Fernández-Busquets, André Körnig, Iwona Bucior, Max M. Burger, and Dario Anselmetti. Self-Recognition and Ca2 -Dependent Carbohydrate-Carbohydrate Cell Adhesion Provide Clues to the Cambrian Explosion. Molecular Biology and Evolution, 2009; 26 (11): 2551 DOI: 10.1093/molbev/msp170

Cite This Page:

IBEC - Institute for Bioengineering of Catalonia. "Novel Evolutionary Theory For The Explosion Of Life." ScienceDaily. ScienceDaily, 27 October 2009. <www.sciencedaily.com/releases/2009/10/091016224153.htm>.
IBEC - Institute for Bioengineering of Catalonia. (2009, October 27). Novel Evolutionary Theory For The Explosion Of Life. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2009/10/091016224153.htm
IBEC - Institute for Bioengineering of Catalonia. "Novel Evolutionary Theory For The Explosion Of Life." ScienceDaily. www.sciencedaily.com/releases/2009/10/091016224153.htm (accessed September 20, 2014).

Share This



More Plants & Animals News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) — The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) — Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) — The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) — A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins