Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

High levels of carbon dioxide threaten oyster survival

06.08.2010
It has been widely reported that the build up of carbon dioxide (CO2) in the air, which is caused by human behavior, will likely lead to climate change and have major implications for life on earth.

But less focus has been given to global warming's evil twin, ocean acidification, which occurs when CO2 lowers the pH of water bodies, thus making them more acidic. This lesser known phenomenon may have catastrophic effects on all sea life.

Oysters in Peril

Inna Sokolova, associate professor of biology at the University of North Carolina at Charlotte, studies the affect of high carbon dioxide on oyster survival, growth and shell hardness. The results of her research suggest that creatures once thought to be fairly adaptable to changes in the environment, may be in serious trouble.

Sokolova's research team includes Anna Ivanina and Ilya Kurochkin also from the University of North Carolina at Charlotte and Nicholas Lieb and Elia Beniash from the Department of Oral Biology at the University of Pittsburg. Their research findings will be reported by Sokolova at the Global Change and Global Science: Comparative Physiology in a Changing World conference from August 4-7, 2010 in Westminster, Colorado. This conference is sponsored by the American Physiological Society (http://www.the-aps.org). The full conference program is found at http://www.the-aps.org/meetings/aps/comparative/preprogram.htm.

The research group monitored oysters that were kept in high CO2 conditions. Juvenile oysters were affected the most by high CO2 conditions. These young oysters grow at a faster rate than the adults and need to use more energy for survival. There was a higher chance that juvenile oysters would die if kept in high CO2. They also had reduced growth of their shells and their soft bodies. The young oysters' shells were also more fragile and prone to breaking, potentially making them more susceptible to predators.

"Living in the high CO2 world may increase the cost of living which cuts into other energy expending pathways," says Sokolova. "Everyday maintenance becomes harder making it harder to live."

The effects on growth were less pronounced in the adult oysters since they don't grow as fast and have slower metabolisms than the juveniles.

The fact that the early life stages are more affected by high CO2, suggests that this may serve as a bottleneck for oyster decline. Sokolova says, "Expect to see huge effects on populations in the future."

The researchers found evidence that the oysters are sensing and trying to offset the affects of a high CO2 environment. The oyster's soft body covering called the mantle had increased expression of carbonic anhydrase, an enzyme that regulates pH and helps make bicarbonate, which is used to make the shell. Sokolova believes that the increased levels of this enzyme show that the oysters are at least trying to compensate for the acidic conditions in response to CO2, but it doesn't seem to be enough.

Oysters – Ecosystem Engineers of the Sea

Oysters live in estuaries – coastal water bodies that have fresh water rivers flowing into salt water – which are highly variable environments because of tides, waves and changes in salt concentration. The focus for those scientists interested in ocean acidification/climate change research generally has been on organisms in stable situations that are thought to be more affected by small changes in the environment. "People feel that oysters are tough and will tough out the changing conditions so they haven't been a primary research focus, but oysters are vulnerable too," says Sokolova.

Sokolova describes oysters as "ecosystem engineers," that are responsible for preventing erosion, filtering the water, ridding the water of harmful algae, providing a habitats and nurseries for other species like crabs. In addition, they are the number one harvested mollusk, meaning their presence is important economically for the seafood industry.

"We are looking at the effects of a very real environmental stressor that oysters see even nowadays. Our research shows that even under the present conditions they may be stressed," says Sokolova. "Monitoring these guys will help us monitor the effects on the entire ecosystem as levels of CO2 increase."

NOTE TO EDITORS: Dr. Sokolova will present her team's findings during the conference, Global Change and Global Science: Comparative Physiology in a Changing World. To arrange an interview with her, please contact Donna Krupa at 301.634.7209 or dkrupa@the-aps.org.

Physiology is the study of how molecules, cells, tissues and organs function to create health or disease. The American Physiological Society (www.The-APS.org/press) has been an integral part of this discovery process since it was established in 1887.

Donna Krupa | EurekAlert!
Further information:
http://www.the-aps.org

More articles from Ecology, The Environment and Conservation:

nachricht Dead trees are alive with fungi
10.01.2018 | Helmholtz Centre for Environmental Research (UFZ)

nachricht Management of mountain meadows influences resilience to climate extremes
10.01.2018 | Max-Planck-Institut für Biogeochemie

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

Im Focus: A thermometer for the oceans

Measurement of noble gases in Antarctic ice cores

The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...

Im Focus: Autoimmune Reaction Successfully Halted in Early Stage Islet Autoimmunity

Scientists at Helmholtz Zentrum München have discovered a mechanism that amplifies the autoimmune reaction in an early stage of pancreatic islet autoimmunity prior to the progression to clinical type 1 diabetes. If the researchers blocked the corresponding molecules, the immune system was significantly less active. The study was conducted under the auspices of the German Center for Diabetes Research (DZD) and was published in the journal ‘Science Translational Medicine’.

Type 1 diabetes is the most common metabolic disease in childhood and adolescence. In this disease, the body's own immune system attacks and destroys the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fachtagung analytica conference 2018

15.01.2018 | Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

 
Latest News

Black hole spin cranks-up radio volume

15.01.2018 | Physics and Astronomy

A matter of mobility: multidisciplinary paper suggests new strategy for drug discovery

15.01.2018 | Life Sciences

New method to map miniature brain circuits

15.01.2018 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>