Navigation Links
Study identifies molecules used by certain species of seaweed to harm corals
Date:10/17/2011

earchers followed up their initial study by investigating interactions between eight different species of seaweed and three species of coral growing in the waters off the Fiji Islands. In 79 percent of the interactions studied, the seaweed chemicals harmed the coral.

"Though some corals were more resistant than others, what we have shown is that these seaweeds are generally bad for corals," said Hay, who has been studying coral reefs for more than 30 years. "At some level, these seaweed molecules can definitely kill the corals. But at other levels, what they are probably doing is cutting off the options for reefs to recover by making these reefs unreceptive to newly-arriving coral larvae. It is difficult for juvenile corals to colonize and grow through a chemically-toxic layer of seaweed."

In the 2010 study, the researchers determined that seaweed harmed coral only when their surfaces touched. That meant the harmful compounds were likely hydrophobic chemicals that dissolved in oil rather than water.

To identify the specific harmful compounds, the researchers produced extracts from the surfaces of the two most harmful seaweeds. Using a technique called bioassay-guided fractionation, they divided up compounds in these seaweed extracts by the degree to which they could be dissolved in oils versus water, or by their size.

They then placed gels containing the extracted compounds into contact with the most sensitive coral, Acropora. The coral samples had been placed into metal racks located on healthy coral reefs near Votua Village in the Fiji Islands. Similar gels not containing the extracts were used as controls and produced no effect on the coral.

By studying the effects of the extracts on the coral with a pulse-amplitude-modulated fluorometer to assess changes in coral photosynthesis, the researchers narrowed the list of suspect molecules. From the two most chemically-damaging seaweed species, the r
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. UGA study suggests key to avoiding ankle re-injury may be in the hips and knees
2. Genetic study of cave millipedes reveals isolated populations and ancient divergence between species
3. Study shows that new DNA test to identify Down syndrome in pregnancy is ready for clinical use
4. Study shows unexpected effect of climate change on body size for many different species
5. Joslin study finds clue to birth defects in babies of mothers with diabetes
6. First genome-wide association study for dengue identifies candidate susceptibility genes
7. Largest ever genetic study of liver function could point the way to new treatments
8. Study reveals new role for RNA interference during chromosomal replication
9. Method of studying roots rarely used in wetlands improves ecosystem research
10. Southampton scientists herald significant breakthrough in study of chlamydia
11. Einstein College of Medicine given $6.7 million to study congenital heart defect genetics
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study identifies molecules used by certain species of seaweed to harm corals
(Date:4/23/2014)... group decision increases with the abundance of brains involved ... variety of factors as often happens in life ... groups actually tend to make more accurate decisions while ... pieces of information. , The findings present a significant ... the "wisdom of crowds," wherein individual observations even ...
(Date:4/23/2014)... newly coined term for novels and films which focus on ... Copenhagen shows how these fictions serve as a mental laboratory ... change and imagine other living conditions. , "Global warming ... atmosphere; it is also a cultural phenomenon in which meaning ... films we see. And there are so many of them ...
(Date:4/23/2014)... HOUSTON, April 23, 2014 A biomedical engineer at ... highly innovative technology to make blood transfusions safer. His ... the National Institutes of Health (NIH). , Blood ... one of modern medicine,s absolute necessities. Without them, for ... mean transfusions are perfect, however. There,s strong evidence that ...
Breaking Biology News(10 mins):Too many chefs: Smaller groups exhibit more accurate decision-making 2Too many chefs: Smaller groups exhibit more accurate decision-making 3Fiction prepares us for a world changed by global warming 2Fiction prepares us for a world changed by global warming 3UH biomedical engineer works to make blood transfusions safer 2UH biomedical engineer works to make blood transfusions safer 3
... More than 450 world experts from 60 countries will ... DNA "barcoding" - a rapidly growing international initiative to develop ... Earth. The Fourth International Barcode of Life Conference ... from Wednesday 30 November to Saturday 3 December. ...
... years ago, two teams of explorers raced to be the first ... South Pole on December 14, 1911. , Thirty-three days later ... Falcon Scott arrived at the Pole in second place. At ... by Douglas Mawson was searching for the South Magnetic Pole. ...
... surface of an implant such as a new hip or ... and researchers at the University of Gothenburg, Sweden, can now ... are presented in the International Journal of Nanomedicine . ... of the most common reasons for an implant being rejected," ...
Cached Biology News:Seaweed hotspots, illegal logging, and discovering new species under the desert 2Seaweed hotspots, illegal logging, and discovering new species under the desert 3Seaweed hotspots, illegal logging, and discovering new species under the desert 4Climate change stunting growth of century-old Antarctic moss shoots 2Cobblestones fool innate immunity 2
(Date:1/15/2014)... laureate Herbert Kroemer famously observed, referring to the ... where layers of different materials meet. In today,s ... of metal oxides are becoming increasingly prominent, with ... superconductors, ferroelectrics and multiferroics. Realizing the vast potential ...
(Date:1/15/2014)... 2014 The Pittcon Organizing Committee is pleased ... Safety Tech , an e-Journal and producer of ... the second year for the co-location of Food Labs Conference ... provides that the registration fee to attend the two-day Food ...
(Date:1/15/2014)... Look inside the new Preferred Solutions® catalog ... from fluid handling to instruments to supplies. Many items ... order. , Preferred Solutions features a full selection ... model for precise flow control and dispensing to I/P® ...
(Date:1/15/2014)... OXFORD, England and SAN JOSE, California ... an international biotechnology company developing antibody-drug conjugates for cancer, today ... its Board of Directors. Dr Reynolds has over 20 years, ... Chief Medical Officer at Seattle Genetics. "I am ...
Breaking Biology Technology:A deeper look at interfaces 2Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3Cole-Parmer Begins 2014 with the Release of Preferred Solutions 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 3
... May 9, 2011 /PRNewswire-Asia-FirstCall/ -- American Oriental Bioengineering, ... or "AOB"), a pharmaceutical company dedicated to improving ... a broad range of prescription and over–the-counter ("OTC") ... quarter ended March 31, 2011. ...
... Fla., May 9, 2011 Dyadic International, Inc. ... focused on the discovery, development, manufacture and sale ... industrial enzyme and biopharmaceutical industries, today announced that ... and development center in The Netherlands, will be ...
... 9, 2011 Ardea Biosciences, Inc. (Nasdaq: ... of small-molecule therapeutics for the treatment of serious diseases, ... first quarter ended March 31, 2011. "Results from our ... with allopurinol demonstrate lesinurad,s potential to bring relief to ...
Cached Biology Technology:American Oriental Bioengineering Reports First Quarter 2011 Financial Results 2American Oriental Bioengineering Reports First Quarter 2011 Financial Results 3American Oriental Bioengineering Reports First Quarter 2011 Financial Results 4American Oriental Bioengineering Reports First Quarter 2011 Financial Results 5Ardea Biosciences Reports Recent Accomplishments and Announces First Quarter 2011 Financial Results 2Ardea Biosciences Reports Recent Accomplishments and Announces First Quarter 2011 Financial Results 3Ardea Biosciences Reports Recent Accomplishments and Announces First Quarter 2011 Financial Results 4Ardea Biosciences Reports Recent Accomplishments and Announces First Quarter 2011 Financial Results 5Ardea Biosciences Reports Recent Accomplishments and Announces First Quarter 2011 Financial Results 6
APG5 autophagy 5-like (S. cerevisiae)...
...
Griess Reagent component for determination of nitrite in aqueous solutions....
... terminators, template DNA, primers, salts or other ... have proved critical for both standard and ... work with dye terminator cycle sequencing chemistries ... unique uniformity of the magnetic paeticles guarantees ...
Biology Products: