Ocean ecosystems play a critical role in carbon ... Some plankton combine calcium and dissolved carbonates to form a calcium carbonate protective coating like the shells and other body parts ...

Ocean acidification can negatively affect marine life, causing organisms' shells and skeletons made from calcium carbonate to dissolve. The more acidic the ocean, the faster the shells dissolve. By ...

Exclusive photos reveal a sprawling, 300-year-old coral near Solomon Islands, recently discovered by the National Geographic ...

The accumulation of anthropogenic CO₂ in the ocean has altered carbonate chemistry in surface waters since preindustrial times and is expected to continue to do so in the coming centuries. Changes in ...

According to a recent study published in Nature, many planktonic foraminifera species may face unprecedented environmental ...

When CO2 dissolves in the ocean, it raises the water's acidity level. This prevents a build up of calcium carbonate, which corals draw from seawater to build their skeleton. The study, published ...

Over time, more hydrogen ions and fewer carbonate ions cause the ocean to trend towards acidity. Some marine organisms, such as oysters and corals, need calcium and carbonate — or salt molecules made ...

Planktonic foraminifera are tiny marine organisms, which are essential to the ocean's carbon cycle. A recent study reveals that these populations are shrinking at an alarming rate due to ocean warming ...

Found all over the world, calcite is the most stable form of calcium carbonate and is the main mineral found in limestone. We find calcite in the ocean, in shells or hard parts of marine organisms ...

Plankton are a diverse group of marine organisms, which are carried by tides and currents. Most are microscopic, but there ...