News tagged with calcium carbonate

Unprecedented, man-made trends in ocean's acidity

Recent carbon dioxide emissions have pushed the level of seawater acidity far above the range of the natural variability that existed for thousands of years, affecting the calcification rates of shell-forming ...

Jan 22, 2012
4 / 5 (20) 29 | with audio podcast

Sea cucumbers: Dissolving coral reefs?

Coral reefs are extremely diverse ecosystems that support enormous biodiversity. But they are at risk. Carbon dioxide emissions are acidifying the ocean, threatening reefs and other marine organisms. New research led by Carnegie's ...

Dec 22, 2011
5 / 5 (1) 0 | with audio podcast

Crystal clear research

(PhysOrg.com) -- Scientists have successfully created synthetic crystals whose structures and properties mimic those of naturally occurring biominerals such as seashells.

Sep 06, 2011
4.5 / 5 (4) 1 | with audio podcast

How soft corals defy their environment

Many marine organisms, including corals, build skeletons from calcium carbonate -- in the form of calcite or aragonite. The current composition of seawater favors the formation of aragonite -- but soft corals have a specific ...

Aug 16, 2011
not rated yet 0

Soft coral builds strong reefs

Scientists have long believed soft corals, one of the many endangered elements of marine life, are only minor contributors to the structure of coral reefs. But that's not true, says new research from Tel Aviv ...

Aug 16, 2011
5 / 5 (2) 0