These viruses, including an RNA virus never before isolated from a coral, have been shown for the first time to clearly be associated with these microalgae called Symbiodinium. If it's proven that they are infecting those algae and causing disease, it will be another step toward understanding the multiple threats that coral reefs are facing.
The research was published today in the ISME Journal, in work supported by the National Science Foundation.
"We're way behind in our knowledge of how viral disease may affect coral health," said Adrienne Correa, a researcher with the Department of Microbiology at Oregon State University. "If viral infection is causing some bleaching, it could be important in the death of corals and contribute to reef decline. This potential threat from viruses is just starting to be recognized."
Corals co-exist with these algae in a symbiotic relationship, scientists say, in which the algae provide energy to the coral, and contribute to the construction of reefs. The coral in turn offers a place for the algae to live and provides nutrients for it.
Corals and viruses have evolved along with their resident algae for millions of years. They have persisted through previous climate oscillations, and the presence of viruses within corals or their algae doesn't necessarily indicate they are affecting coral colony health. If viruses are causing disease or bleaching of colonies, it's also unknown whether this is happening now more than in the past.
"Corals are known to face various environmental threats, such a warming temperatures, competition and pollution," Correa said. "Some of the environmental changes of the past were likely more gradual and allowed the coral and its associates more time to adapt.
"The stresses challenging coral reefs now are more intense and frequent," she said. "This may mean viruses cause more problems for corals and their algae now than they did historically."
In continued research at OSU, scientists will inoculate Symbiodinium with the viruses and try to prove they are causing actual disease. If the viruses are killing the algae, scientists said, it could have significant implications for coral reef health and survival. There are almost two dozen known diseases that are affecting coral, and scientists still do not know the cause of most of them.
Coral abundance has declined about 80 percent in the Caribbean Sea in the past 30-40 years, and about one-third of all corals around the world are threatened with extinction.
Editor's Note: A digital image of bleached coral is available online: http://bit.ly/L6w0x8
Adrienne Correa | EurekAlert!
New approach for environmental test on livestock drugs
27.07.2016 | Universität Zürich
Managing an endangered river across the US-Mexico border
18.07.2016 | International Institute for Applied Systems Analysis (IIASA)
Transparent electronics devices are present in today’s thin film displays, solar cells, and touchscreens. The future will bring flexible versions of such devices. Their production requires printable materials that are transparent and remain highly conductive even when deformed. Researchers at INM – Leibniz Institute for New Materials have combined a new self-assembling nano ink with an imprint process to create flexible conductive grids with a resolution below one micrometer.
To print the grids, an ink of gold nanowires is applied to a substrate. A structured stamp is pressed on the substrate and forces the ink into a pattern. “The...
A new Fraunhofer MEVIS method conveys medical interrelationships quickly and intuitively with innovative visualization technology
On the monitor, a brain spins slowly and can be examined from every angle. Suddenly, some sections start glowing, first on the side and then the entire back of...
Researchers at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered an unusual property of purple bronze that may point to new ways to achieve high temperature superconductivity.
While studying purple bronze, a molybdenum oxide, researchers discovered an unconventional charge density wave on its surface.
Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.
Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...
Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases
Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...
15.07.2016 | Event News
15.07.2016 | Event News
11.07.2016 | Event News
27.07.2016 | Life Sciences
27.07.2016 | Interdisciplinary Research
26.07.2016 | Information Technology