HOME >> BIOLOGY >> NEWS
Corals switch skeleton material as seawater changes

Leopards may not be able to change their spots, but corals can change their skeletons, building them out of different minerals depending on the chemical composition of the seawater around them.

That's the startling conclusion drawn by a Johns Hopkins University marine geologist, writing in the July issue of the journal Geology.

Postdoctoral fellow Justin Ries and his collaborators say this is the first known case of an animal altering the composition of its skeleton in response to change in its physical environment. The aquatic animal's sensitivity to such changes poses questions about its evolutionary history, as well as the future of the ecologically important coral reefs that it builds, Ries said, especially at a time when seawater is changing in response to global warming and the buildup of carbon dioxide in the atmosphere.

A 2005 Ph.D. graduate of Johns Hopkins, Ries collaborated on the research with his dissertation advisors, Steven M. Stanley (now of the University of Hawaii) and Lawrence A. Hardie, professor in the Morton K. Blaustein Department of Earth and Planetary Sciences at Johns Hopkins.

Reefs are large underwater structures of coral skeletons, made from calcium carbonate secreted by generation after generation of tiny coral polyps over sometimes millions of years of coral growth in the same location. The team showed that corals can switch from using aragonite to another mineral, calcite, in making the calcium carbonate. They make that switch in response to decreases in the ratio of magnesium to calcium in seawater, Ries said. That ratio has changed dramatically over geologic time.

"This is intriguing because, until now, it was generally believed that the skeletal composition of corals was fixed," he said.

Ries spent two months growing three species of modern scleractinian corals (the major reef-building corals in today's seas) in seawater formulated at six different chemical ratios th
'"/>

Contact: Lisa DeNike
LDE@jhu.edu
443-287-9960
Johns Hopkins University
6-Jul-2006


Page: 1 2 3

Related biology news :

1. Corals -- More complex than you?
2. Corals that can fight global warming may one day help fragile reefs
3. U-M researchers find family of on switches that cause prostate cancer
4. Scientists find stem cell switch
5. Illinois-based study of energy crops finds miscanthus more productive than switchgrass
6. Scientists find brown fat master switch
7. Weizmann Institute scientists develop a general control switch for protein activity
8. U-M researchers discover gene switched off in cancer can be turned on
9. Babies able to tell through visual cues when speakers switch languages: UBC study
10. Exercise pill switches on gene that tells cells to burn fat
11. Structural basis for photoswitching in fluorescent proteins brought into focus

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/5/2017)... -- The Allen Institute for Cell Science today announces the ... and dynamic digital window into the human cell. The ... of deep learning to create predictive models of cell ... growing suite of powerful tools. The Allen Cell Explorer ... available resources created and shared by the Allen Institute ...
(Date:3/30/2017)...  On April 6-7, 2017, Sequencing.com will host the ... hackathon at Microsoft,s headquarters in Redmond, Washington ... developing health and wellness apps that provide a unique, ... is the first hackathon for personal genomics and ... in the genomics, tech and health industries are sending ...
(Date:3/27/2017)... March 27, 2017  Catholic Health Services (CHS) ... Systems Society (HIMSS) Analytics for achieving Stage 6 ... sm . In addition, CHS previously earned a ... using an electronic medical record (EMR). ... level of EMR usage in an outpatient setting.  ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... For the second time in ... STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. Tuesday, ... , US2020’s mission is to change the trajectory of STEM education in America ...
(Date:10/10/2017)... Calif. , Oct. 10, 2017 SomaGenics ... from the NIH to develop RealSeq®-SC (Single Cell), expected ... for profiling small RNAs (including microRNAs) from single cells ... Program highlights the need to accelerate development of approaches ... "New techniques for measuring levels ...
(Date:10/9/2017)... 9, 2017  BioTech Holdings announced today identification ... its ProCell stem cell therapy prevents limb loss ... Company, demonstrated that treatment with ProCell resulted in ... as compared to standard bone marrow stem cell ... in reduction of therapeutic effect.  ...
(Date:10/9/2017)... ... October 09, 2017 , ... ... line of medical marijuana products targeting the needs of consumers who are incorporating ... Kindred takes place in Phoenix, Arizona. , As operators of two successful Valley ...
Breaking Biology Technology:
Cached News: