Studies in the Southern Ocean by Australian scientists found that the shells of tiny amoeba-like creatures called foraminifera have become thinner since the Industrial Revolution.
The scientists say this shows that increasing CO2 uptake in the ocean has a direct effect on the ability of micro-organisms to make shells.
The paper, being presented at the University of Copenhagen's International Scientific Congress on Climate Change, will add to a rising tide of scientific concern over ocean acidification.
The scientists say this shows that increasing CO2 uptake in the ocean has a direct effect on the ability of micro-organisms to make shells.
The paper, being presented at the University of Copenhagen's International Scientific Congress on Climate Change, will add to a rising tide of scientific concern over ocean acidification.