Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Ocean acidification makes coralline algae less robust

08.02.2016

Ocean acidification (the ongoing decrease in the pH of the Earth's oceans, caused by the uptake of CO2 from the atmosphere), is affecting the formation of the skeleton of coralline algae which play an important part in marine biodiversity, new research from the University of Bristol, UK has found.

Coralline red algae form maerl beds which provide important habitat in shallow waters, including the UK coastal shelf. Maerl hosts a high diversity of organisms by providing habitats, shelter and nursery areas for, amongst others, fish larvae and young scallops. Both coralline algae and the maerl beds they generate are protected by national and international regulation as they form biodiversity hotspots and support fisheries.


This is coralline algae (with a scale bar of 1cm). New research from the University of Bristol, UK has found that ocean acidification is affecting the formation of the skeleton of coralline algae which play an important part in marine biodiversity.

Credit: Leanne Melbourne

The skeletal structure of coralline algae is composed of high- magnesium calcite, the most soluble form of calcium carbonate, and is therefore potentially vulnerable to the change in carbonate chemistry resulting from the absorption of man-made CO2 by the ocean.

Previous Bristol-led research has shown that ocean acidification affects coralline algae by reducing the thickness of their cell walls and thus their structural strength, crucial for withstanding natural stresses such as wave movement or grazing. It also showed that, given enough time, the algae can acclimatise and continue to grow.

In a new study, published today in Scientific Reports, Dr Federica Ragazzola and colleagues assessed this new growth to see whether it is of the same quality as before and hence whether coralline algae are able to grow as strong a skeleton under climate change conditions. The strength of this skeletal structure is important as it impacts the ability of alga to provide shelter for other species.

The researchers found that, under ocean acidification, the chemical composition of the skeleton is changing, making it potentially more brittle.

Professor Daniela Schmidt, Head of Global Change at the Cabot Institute and senior author of the study said: "Our research suggests that in the near future these organisms are not sufficiently calcified to provide habitat for other species. Coralline algae support a huge variety of marine life, with more than 460 species associated with their beds including economically important species such as scallops.

"While a number of studies have now shown that coralline algae can continue to grow even in challenging environmental conditions, it is fundamentally important that we combine these physiological studies with potential impacts on the structural integrity of the skeleton and its consequences to habitat formation."

###

Paper

'Impact of high CO2 on the geochemistry of the coralline algae Lithothamnion glaciale' by F. Ragazzola, L.C. Foster, C.J. Jones, T B. Scott, J. Fietzke, Matt R. Kilburn and D.N. Schmidt in Scientific Reports

Media Contact

Hannah Johnson
hannah.johnson@bristol.ac.uk
44-117-928-8896

 @BristolUni

http://www.bristol.ac.uk 

Hannah Johnson | EurekAlert!

More articles from Earth Sciences:

nachricht New research calculates capacity of North American forests to sequester carbon
16.07.2018 | University of California - Santa Cruz

nachricht Scientists discover Earth's youngest banded iron formation in western China
12.07.2018 | University of Alberta

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Microscopic trampoline may help create networks of quantum computers

17.07.2018 | Information Technology

In borophene, boundaries are no barrier

17.07.2018 | Materials Sciences

The role of Sodium for the Enhancement of Solar Cells

17.07.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>