Sunday , April 11 2021

Acidic acidity "can have consequences for millions" – ScienceDaily

Oxygen acidity can have serious consequences for millions of people globally whose lives depend on coastal protection, fishing and aquaculture, suggests the new publication.

Writing inside New topics in life sciences, scientists say only significant reductions in emissions of fossil fuels will prevent changes that are already visible in areas where projected future carbon dioxide levels are becoming widespread.

They also call for a binding international agreement based on the United Nations sustainable development goals to minimize and address ocean acidity impacts.

The article was written by Jason Hal Spencer, a professor of marine biology at the University of Plymouth and Plymouth Graduate, Dr. Ben Harvey, now an assistant at the University of Tsukuba, the Marine Research Research Center in Chimoda.

They and other associates have published several studies over the past decade, which show the threats from ocean acidification in terms of habitat degradation and loss of biodiversity.

These are centered around the coast of Japan, where they have shown that ocean acidification has a major impact on marine life and in the Mediterranean, where they have shown a negative impact on wild fish.

Both regions have a volcanic CO2 is stimulated, where the outgoing gas dissolves into seawater and creates conditions similar to those expected to emerge around the world in the coming years.

Their new publication provides a synthesis of the possible effects of ocean acidity on the properties, functions and services of the ecosystem and is based on laboratory experiments and observations along natural gradients in CO2.

She says CO studies2 spread throughout the world showed that combs made by organisms with shells or skeletons, such as oysters or coral, are sensitive to ocean acidity and that degraded cliffs provide less coastal protection and less residue for commercially important fish and shellfish.

This increases the risk for marine products and climate change services, causing changes in algae domination, habitat degradation and loss of biodiversity in the tropics, sub-tropics and temperate coasts.

Dr Harvey, who graduated from the BSc (Hons) Ocean Science program in 2008, said: "We release about 1 million tonnes of carbon dioxide per hour in the Earth's atmosphere. About 25% of this gas is affected by the ocean, where reacts with seawater to form a weak acid, causing the pH of the ocean surface to fall by about 0.002 units per year. Of course, the chemistry of this rapid change in surface water, however, is uncertainty about its effects on society, what is it about what we are trying to overcome in this study ".

Professor Hal-Spencer, lead author of the edition, added: "The Paris agreement on climate change was welcomed, but the acidity of the oceans is not mentioned, nor the fact that this rapid shift in surface chemistry is undermining the social, economic and environmental pillars of sustainable development.The time is ripe for the "Paris Agreement for the Oceans", with a specific objective to minimize and address the effects of acidity on the oceans, including through enhanced scientific cooperation at all levels. "

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