Navigation Links
Dissolved organic matter in the water column may influence coral health
Date:3/4/2008

PORT ARANSAS, TexasBacterial communities endemic to healthy corals could change depending on the amount and type of natural and man-made dissolved organic matter in seawater, report researchers from The University of Texas at Austin Marine Science Institute and Mote Marine Laboratory in Sarasota, Florida.

Healthy corals naturally exude a surrounding mucous layer in which a complex population of bacteria exists. Recent studies have indicated that some coral diseases may be linked to community shifts in this bacterial population.

In experiments with a common reef building coral in the Florida Keys, Chris Shank of the University of Texas Marine Science Institute and Kim Ritchie of Mote Marine Laboratory found an obvious shift in the composition of the coral bacterial community resulting from changes in the pool of surrounding dissolved organic matter.

Dissolved organic matter in the water column near Florida Keys coral reefs comes from a variety of natural sources, including coastal mangroves, seagrasses, and plankton, as well as man-made sources, including sewage effluent. The composition of dissolved organic matter surrounding Florida Keys coral reefs has likely changed in recent decades due to growing coastal populations.

When coastal ecosystems are physically altered, the natural flow of dissolved organic material to nearby coral ecosystems is disrupted with potentially harmful consequences for the corals, said Shank, assistant professor of marine science.

Shank and Ritchie, manager of the Marine Microbiology Program at Mote, placed Montastraea faveolata coral fragments in aquaria filled with water collected from either Florida Bay or from an offshore bluewater site.

Dissolved organic matter concentrations are much greater in Florida Bay than in offshore waters and typically have different chemical characteristics. Water collected from these distinct locations used for the coral incubation experiments represented the variable nature of dissolved organic matter experienced by corals in the middle and lower Florida Keys.

They found that the microbial community of healthy corals shifts measurably when exposed to water from Florida Bay, suggesting the microbes that normally play a role in coral immunity may be out-competed by potentially problematic bacteria. In combination with increased water temperatures, this is an example of the type of compounded stressors known to cause health problems in corals, or reef deterioration.

The scientists reported their results today at the Ocean Sciences Meeting in Orlando, Florida.

The scientists research is part of their larger effort to investigate the link between alterations to the south Florida ecosystem and Florida Keys coral ecosystems. Coral reefs there, as with coral reefs around the world, are increasingly threatened by rising water temperatures, advancing ocean acidification and rapidly rising coastal populations.

Corals are especially susceptible to coastal alterations because they commonly exist in shallow waters at the interface of land and sea.

Shank and Ritchie are planning a series of experiments to more closely evaluate the chemical nature of the water column dissolved organic matter surrounding the corals in the Florida Keys and identify shifts in potentially harmful bacterial populations.


'/>"/>

Contact: Chris Shank
chris.shank@mail.utexas.edu
361-749-6776
University of Texas at Austin
Source:Eurekalert

Related biology news :

1. New microsensor measures volatile organic compounds in water and air on-site
2. Surprise in the organic orchard -- a healthier worm in the apple
3. Study reveals that nitrogen fertilizers deplete soil organic carbon
4. Is it organic or not?
5. Uncharged organic molecule can bind negatively charged ions
6. Primate sperm competition: speed matters
7. How size matters
8. Nitrous oxide: definitely no laughing matter
9. Freshwater supplies threatened in central Pacific
10. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
11. Innovative civil engineering application promises cleaner waters
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/20/2016)... 2016   Valencell , the leading innovator ... STMicroelectronics (NYSE: STM), a global semiconductor leader serving ... today the launch of a new, highly accurate ... includes ST,s compact SensorTile turnkey multi-sensor ... sensor system. Together, SensorTile and Benchmark deliver the ...
(Date:12/15/2016)... and BADEN-BADEN, Germany , December 15, ... global financial services provider, today announced an agreement with NuData ... biometrics, to join forces. The partnership will enable clients to ... in compliance with local data protection regulation. ... In order to provide ...
(Date:12/15/2016)... "Increase in mobile transactions is driving the growth of ... expected to grow from USD 4.03 billion in 2015 ... of 29.3% between 2016 and 2022. The market is ... smart devices, government initiatives, and increasing penetration of e-commerce ... to grow at a high rate during the forecast ...
Breaking Biology News(10 mins):
(Date:1/18/2017)... MA (PRWEB) , ... January 18, 2017 , ... ... today that Dr. Dante Leven successfully implanted SpineFrontier’s A-CIFT™ Solofuse-P™. The operation took ... Center in Valley Stream, NY. The procedure was an anterior cervical discectomy and ...
(Date:1/18/2017)... , ... January 18, 2017 , ... ... federally funded bio-focused Manufacturing Innovation Institutes (MII). U.S. Secretary of Commerce Penny Pritzker ... Biopharmaceuticals (NIIMBL), and the Department of Defense has announced the award of a ...
(Date:1/18/2017)... York, NY (PRWEB) , ... January 18, 2017 , ... Researchers from a new ... (PSA) do not fall low enough after prostate cancer treatment, this indicates there is still ... man’s risk of mortality. , “ The PSA test has always been an indicator of ...
(Date:1/18/2017)... ... January 18, 2017 , ... ... to sell research and genetic testing lab equipment from two different leading institutes. This ... and Northeast regions of the United States. This 1-day online auction will take ...
Breaking Biology Technology: