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Home / Science / The study shows that acidification of the oceans has a major impact on marine life

The study shows that acidification of the oceans has a major impact on marine life



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IMAGE: Corals, such as this Acroporid table, provide habitat for a wide range of fauna at a reference site, where the CO 2 concentration is currently 300ppm.
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Credit: Marco Milazzo

Carbon dioxide emissions kill coral reefs and kelp forests as heat waves and ocean acidification harm marine ecosystems, scientists warn

Composing in Research reports say researchers that three centuries industrial development has already had a significant impact on our seas.

But if CO 2 continues to grow as predicted, the coming decades will bring down seawater pH

Their predictions will follow a comprehensive study of the effects of recently discovered volcanic CO 2 Leakage off Shikine Island, Japan, which is on the border of temperate and tropical (1

9659005) Due to the ocean currents in the region, there are naturally low CO water values ​​ 2 similar to those prior to the global industrial revolution. However, the volcanic infiltrations indicate that increasing CO 2 concentrations will affect future ecology in both the Northwest Pacific and worldwide.

Lead author Sylvain Agostini, associate professor at Tsukuba University Shimoda Marine Research Center, said: "This CO 2 infiltration represents an important window into the future. In southern Japan, there has been mass deaths of coral, but in the past year Many people are clinging to the hope that corals will be so it is extremely worrying to see that tropical corals are so susceptible to ocean acidification as it will keep them from moving further north and escaping the damage of too hot water. "19659005" The research was conducted by scientists from the University of Tsukuba in Japan, the University of Plymouth in the UK and the University of Palermo in Italy.

Teams of SCUBA divers who conducted underwater investigations completed CO 2 gradients formed by volcanic seepage and demonstrated the response of fauna and flora to the acidification of seawater.

They found that some plant species benefited from the changing conditions, but smaller weeds and algae were, rather, cover the seafloor, stifling coral and reducing overall marine diversity.

These species and some smaller marine animals thrive because they are more tolerant of exposure to rising CO concentrations 2 . Jason Hall-Spencer, Professor of Marine Biology at the University of Plymouth, said: "Our research location is like a time machine." In areas with pre-industrial CO levels 2 the coast has an impressive amount of calcified organisms such as Corals and Oysters However, in areas of intermediate CO content of today's ocean surface 2 we found significantly fewer corals and other calcified habitats, and thus there was less biodiversity, showing the extensive damage caused by humans from CO 2 emissions were caused in the last 300 years, and if we can not handle the CO 2 emissions, we will undoubtedly see a strong deterioration of coastal systems worldwide. "

Professor Kazuo Inaba, former director of the Shimoda Marine Research Center, added: "Local fishermen are curious how the acidification of the oceans will affect their livelihoods. Currents that flow past Japan bring water with a naturally low CO content 2 and fish benefit from the numerous calcified habitats around our islands. If we are able to meet the objectives of the Paris Convention on Emissions, we should be able to limit further damage to kelp forests, coral reefs and all marine ecosystems.

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